493  
FOUS55 KRIW 140454  
PFMRIW  
FOUS55 KRIW 140454  
PFMRIW  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE RIVERTON WY  
1054 PM MDT TUE APR 13 2021  
 
WYZ020-141100-  
CASPER-NATRONA WY  
42.91N 106.46W ELEV. 5530 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 23 37 26 34 25  
TEMP 25 24 23 29 35 37 37 29 27 27 26 29 32 34 34 28 26 26 25  
DEWPT 17 21 20 20 19 19 18 24 26 25 25 25 25 26 26 25 24 24 23  
RH 71 88 88 69 52 48 46 81 96 92 96 85 75 72 72 88 92 92 92  
WIND DIR NE NE E E E E E E NE E E E NE NE NE NE N N N  
WIND SPD 18 17 18 18 20 19 19 18 18 18 16 12 14 13 13 9 6 8 10  
WIND GUST 27 26 25 25 28 26 26 26 25 26 21 21  
CLOUDS OV OV OV OV BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV  
POP 12HR 40 60 80 70 60  
QPF 12HR 0.01 0.02 0.21 0.13 0.07  
SNOW 12HR T T 2 1 1  
SNOWSHWRS S C C C C C L D D L L L L L L L C C C  
OBVIS BS  
WIND CHILL 11 10 9 17 24 17 14 14 13  
MIN CHILL 11 9 9 25 14 13 14 23 18 15  
WINTER STORM A A A A A A A A A A  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 37 22 40 21 47 26 45 23 50  
TEMP 34 37 27 24 34 37 25 24 41 45 32 30 39 41 29 27 44 48  
DEWPT 25 25 24 21 22 20 20 18 22 23 25 24 25 24 23 21 24 24  
PWIND DIR N N NW W W W N N SW  
WIND CHAR GN GN GN GN GN GN GN LT GN  
AVG CLOUDS OV OV BK BK BK SC SC SC FW FW SC SC BK BK SC SC SC FW  
POP 12HR 50 20 10 5 5 20 30 20 10  
RAIN SHWRS C S  
SNOWSHWRS C C S S S C C S  
 

 
 
WYZ017-141100-  
RIVERTON-FREMONT WY  
43.06N 108.46W ELEV. 5525 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 25 34 26 35 26  
TEMP 30 27 25 28 32 33 34 30 28 27 26 29 32 34 35 30 29 27 26  
DEWPT 18 24 25 24 23 22 21 23 24 25 25 26 24 24 24 23 24 23 23  
RH 60 88100 85 69 63 58 75 85 92 96 88 72 66 64 75 81 85 88  
WIND DIR NE NE NE NE NE NE N N N N N N N N N N N N N  
WIND SPD 17 17 16 16 14 13 14 17 14 16 14 14 13 13 12 10 10 10 9  
WIND GUST 25 25 23 21 23 21 20 20  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV  
POP 12HR 60 90 90 70 30  
QPF 12HR 0.02 0.17 0.44 0.10 0.03  
SNOW 12HR T 3 6 1 T  
SNOWSHWRS C C L D D D D D D D L L C C C C C C C  
WIND CHILL 18 14 12 16 18 16 15 14 18  
MIN CHILL 18 12 12 22 16 14 14 23 20 17  
WINTER STORM A A A A A A A A A A  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 40 23 45 21 51 28 48 25 52  
TEMP 36 39 29 26 37 42 29 24 41 48 36 32 41 44 33 28 44 51  
DEWPT 24 23 22 21 21 18 16 15 21 20 24 24 27 22 23 22 25 22  
PWIND DIR N NW NW S S NE N E SE  
WIND CHAR GN GN GN GN LT LT GN GN LT  
AVG CLOUDS OV BK SC SC SC SC FW FW FW FW SC SC BK BK SC SC SC FW  
POP 12HR 30 10 10 0 0 20 20 10 10  
RAIN SHWRS S S  
SNOWSHWRS C S S S  
 

 
 
WYZ018-141100-  
LANDER-FREMONT WY  
42.82N 108.73W ELEV. 5586 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 22 30 24 33 25  
TEMP 30 23 22 24 28 29 30 27 26 24 24 26 30 32 33 29 27 26 25  
DEWPT 20 22 21 22 21 21 21 21 23 24 24 24 23 22 23 21 22 23 22  
RH 66 96 96 92 75 72 69 78 88100100 92 75 66 66 72 81 88 88  
WIND DIR N N N N N N N N N N NW N N N N N NW N NW  
WIND SPD 9 10 9 8 11 9 10 9 9 9 6 6 8 8 9 5 4 5 4  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV  
POP 12HR 100 90 90 70 40  
QPF 12HR 0.09 0.26 0.53 0.14 0.08  
SNOW 12HR 1 4 7 2 1  
SNOWSHWRS D D D D D D D D D D L L C C C C C C C  
WIND CHILL 12  
MIN CHILL 20 12 13 19 17 14 16 24 22 18  
WINTER STORM W W W W W W W W W W W W W W  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 40 23 43 23 51 29 48 27 53  
TEMP 36 39 30 25 36 41 30 25 43 48 37 32 41 45 35 30 45 51  
DEWPT 25 23 22 20 21 20 18 16 23 23 25 25 27 25 24 23 26 25  
PWIND DIR N N N NW N W NE NW SE  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS OV BK SC SC SC SC FW FW FW FW SC SC BK BK SC SC FW SC  
POP 12HR 30 20 10 0 5 20 30 10 10  
RAIN SHWRS S S C  
SNOWSHWRS C S S S S C  
 

 
 
WYZ028-141100-  
ROCK SPRINGS-SWEETWATER WY  
41.61N 109.07W ELEV. 6760 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 22 39 22 39 24  
TEMP 25 24 23 28 36 39 38 32 28 24 23 27 35 39 38 33 29 26 25  
DEWPT 13 16 18 20 24 25 24 22 20 20 20 21 22 23 21 20 19 20 20  
RH 60 71 81 71 61 57 57 66 71 84 88 78 59 52 50 58 66 78 81  
WIND DIR NE E E E E NE NE NE NE NE NE NE NE NE NE NE NE NE NE  
WIND SPD 32 34 34 31 31 33 29 28 20 18 16 13 14 16 18 16 13 11 14  
WIND GUST 47 51 48 42 43 46 42 39 28 25 23 21 24 25  
CLOUDS OV OV OV BK BK BK OV OV OV BK OV OV BK BK BK BK BK BK BK  
POP 12HR 60 60 70 40 10  
QPF 12HR 0.07 0.06 0.13 0.01 0  
SNOW 12HR 1 00-00 1 T 00-00  
SNOWSHWRS L L L C C C L L L C C C S S  
WIND CHILL 8 6 4 12 23 27 26 18 15 10 10 16 22 18 15 13  
MIN CHILL 8 4 3 24 15 9 9 27 18 13  
WINTER WEATH Y Y Y Y Y Y Y Y Y Y Y Y  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 40 22 42 23 51 28 53 29 56  
TEMP 36 39 27 23 35 39 29 24 41 50 35 30 45 50 35 30 49 54  
DEWPT 20 19 18 17 17 12 14 13 16 13 20 19 23 18 21 20 23 18  
PWIND DIR NE NE NE E NW W NE NE S  
WIND CHAR BZ BZ BZ GN GN GN GN GN GN  
AVG CLOUDS BK SC SC SC SC SC FW CL CL FW FW FW SC SC SC FW FW FW  
POP 12HR 10 5 5 0 0 5 10 5 10  
 

 
 
WYZ026-141100-  
BIG PINEY-SUBLETTE WY  
42.58N 110.11W ELEV. 6990 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 21 40 20 41 20  
TEMP 27 24 22 28 37 40 39 30 25 23 21 27 37 41 40 30 25 24 21  
DEWPT 16 20 20 23 22 22 22 21 21 21 20 22 21 22 21 21 21 21 19  
RH 63 84 92 81 54 48 50 69 84 92 96 81 52 46 46 69 84 88 92  
WIND DIR E W NW S S E S E N N N W S SW SW S S S SE  
WIND SPD 10 2 4 3 8 8 10 4 8 6 6 2 5 8 10 9 5 4 4  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV OV BK BK BK OV OV  
POP 12HR 80 90 80 40 30  
QPF 12HR 0.07 0.22 0.22 0.03 0  
SNOW 12HR 1 T 1 T 00-00  
SNOWSHWRS C L D D D D D D D L C C C C C C S S S  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 42 15 45 15 51 21 52 20 55  
TEMP 38 41 24 17 35 42 24 17 40 47 29 22 43 49 30 23 44 52  
DEWPT 20 19 20 15 17 17 18 14 20 21 23 19 24 24 25 20 24 23  
PWIND DIR SE S W S W W SW S S  
WIND CHAR LT GN LT LT LT GN LT LT LT  
AVG CLOUDS BK SC SC SC SC FW FW FW FW FW FW FW SC SC SC FW FW SC  
POP 12HR 20 10 10 0 0 5 20 5 10  
RAIN SHWRS S  
SNOWSHWRS S S S  
 

 
 
WYZ025-141100-  
PINEDALE-SUBLETTE WY  
42.80N 109.81W ELEV. 7086 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 21 39 21 39 22  
TEMP 26 23 21 28 36 39 38 29 26 23 21 28 36 39 38 30 26 24 22  
DEWPT 18 20 20 22 21 22 21 21 21 21 20 22 22 24 23 22 22 21 20  
RH 71 88 96 78 54 50 50 72 81 92 96 78 56 54 54 72 85 88 92  
WIND DIR E E E E E E E NE N N N N S SW E SE NE SE E  
WIND SPD 12 10 11 12 13 13 14 9 8 6 5 2 5 2 2 5 2 4 3  
WIND GUST 19  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV BK OV BK BK BK BK  
POP 12HR 70 80 80 50 30  
QPF 12HR 0.02 0.09 0.14 0.04 0.03  
SNOW 12HR T T 1 T T  
SNOWSHWRS S C D L L L D D D L C C C C C C S S S  
WIND CHILL 15 12 9 17  
MIN CHILL 15 9 9 28 18 13 15 23 17  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 39 17 42 17 48 22 49 22 51  
TEMP 36 38 24 18 35 39 24 18 41 44 29 24 42 45 29 23 44 48  
DEWPT 21 21 20 15 16 17 17 14 18 19 23 20 22 23 23 19 22 21  
PWIND DIR SE NE NW NE NW NW SW S W  
WIND CHAR LT LT LT LT LT GN LT LT LT  
AVG CLOUDS BK BK BK SC SC SC FW FW FW FW FW SC SC SC SC SC SC SC  
POP 12HR 20 10 10 0 5 10 20 10 10  
RAIN SHWRS S  
SNOWSHWRS S S S  
 

 
 
WYZ013-141100-  
JACKSON-TETON WY  
43.60N 110.73W ELEV. 6451 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 21 39 22 39 22  
TEMP 27 25 22 26 34 38 38 33 29 26 23 26 35 38 38 33 29 26 23  
DEWPT 18 20 18 20 20 19 21 22 22 21 19 20 20 19 21 21 21 21 19  
RH 68 81 84 78 56 46 50 63 75 81 84 78 54 46 50 61 72 81 84  
WIND DIR NE NE NE N NE NE NE NE NE NE NE N N N N NE NE NE NE  
WIND SPD 19 18 19 16 14 14 17 16 13 13 11 10 5 6 10 6 9 9 10  
WIND GUST 28 28 27 23 24  
CLOUDS SC BK OV OV BK OV OV BK OV BK OV OV BK BK BK BK BK SC SC  
POP 12HR 50 60 60 40 30  
QPF 12HR 0.01 0.04 0.04 0.02 0  
SNOW 12HR 00-00 T T T 00-00  
SNOWSHWRS S L L L L L L C C C C C C C C S S  
WIND CHILL 14 11 7 13 22 18 14 12 12  
MIN CHILL 14 7 6 27 18 12 10 31 20 12  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 44 17 47 20 51 24 50 23 53  
TEMP 39 42 27 19 37 44 30 22 42 47 34 26 43 47 33 26 46 50  
DEWPT 21 21 18 14 15 17 18 14 19 23 23 20 24 24 24 20 25 24  
PWIND DIR NE NE NE N N W N NE S  
WIND CHAR GN GN GN GN GN LT LT GN LT  
AVG CLOUDS SC SC SC FW FW FW CL CL CL FW SC SC SC SC FW FW FW SC  
POP 12HR 20 10 10 0 5 10 20 5 20  
RAIN SHWRS S S S  
SNOWSHWRS S S  
 

 
 
WYZ001-141100-  
LAKE YELLOWSTONE-TETON WY  
44.55N 110.42W ELEV. 7835 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 9 30 14 33 14  
TEMP 15 12 9 15 25 30 29 23 19 16 14 20 29 33 31 24 20 17 14  
DEWPT 8 7 6 8 14 16 17 16 14 12 11 13 16 18 18 16 15 12 10  
RH 73 80 87 73 62 55 60 74 80 84 88 74 58 53 58 71 81 80 84  
WIND DIR NE NE NE E E E E NE NE NE NE NE E E NE NE NE NE NE  
WIND SPD 5 6 5 8 9 9 6 4 3 3 2 1 3 4 4 3 1 2 2  
CLOUDS SC SC BK BK OV OV OV BK BK BK BK BK BK BK BK BK SC SC SC  
POP 12HR 20 50 40 30 20  
QPF 12HR 0 0.02 0.02 0 0  
SNOW 12HR 00-00 T 00-00 00-00 00-00  
SNOWSHWRS C C C C C C C C C C C C S S S  
WIND CHILL 1 4  
MIN CHILL 6 -1 -2 17 14 9 14 25 20 14  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 35 11 40 13 44 18 41 15 45  
TEMP 31 33 19 13 31 38 22 15 37 41 26 20 35 38 23 17 38 42  
DEWPT 15 18 13 9 11 12 13 8 15 18 20 16 18 16 16 12 16 18  
PWIND DIR NE NE NE N N NW N NE SW  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS SC SC SC FW FW FW FW CL FW SC SC SC SC SC FW FW FW SC  
POP 12HR 20 10 5 0 20 30 20 10 20  
SNOWSHWRS S S S C S S S S  
 

 
 
WYZ003-141100-  
CODY-PARK WY  
44.52N 109.02W ELEV. 5102 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 19 33 24 36 27  
TEMP 26 21 19 23 30 33 32 28 26 25 24 28 33 36 35 31 29 28 27  
DEWPT 17 17 17 18 18 18 20 22 21 22 22 22 23 21 22 22 21 21 21  
RH 68 84 92 81 60 53 61 78 81 88 92 78 66 54 59 69 72 75 78  
WIND DIR N N N N N N N N NW N N N N N N N NW NW N  
WIND SPD 11 9 10 11 13 12 13 12 9 8 9 11 13 14 13 10 10 8 8  
WIND GUST 20 21  
CLOUDS SC SC BK BK OV OV OV OV OV OV OV OV OV OV OV OV BK OV OV  
POP 12HR 20 50 70 40 20  
QPF 12HR 0 0.02 0.08 0.03 0  
SNOW 12HR 00-00 T 1 T 00-00  
SNOWSHWRS C C C C L L L C C C S S S S S S S  
WIND CHILL 15 7 12 19 17  
MIN CHILL 15 7 7 21 17 14 14 23 20 19  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 43 25 50 28 56 31 48 28 55  
TEMP 39 40 33 29 43 48 36 32 49 52 39 34 42 46 36 31 49 53  
DEWPT 24 22 21 19 19 18 19 16 19 22 26 25 23 22 21 19 23 22  
PWIND DIR N NW NW W S N N NW S  
WIND CHAR GN GN GN GN LT GN GN GN GN  
AVG CLOUDS OV BK SC SC SC FW FW FW FW SC SC BK BK SC SC FW FW SC  
POP 12HR 20 5 5 0 10 30 20 10 10  
RAIN SHWRS C S S S  
SNOWSHWRS S C S S S  
 

 
 
WYZ004-141100-  
GREYBULL-BIG HORN WY  
44.52N 108.08W ELEV. 3939 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 24 42 28 42 29  
TEMP 31 27 25 29 37 41 41 36 33 31 28 31 38 42 41 37 34 32 29  
DEWPT 16 20 20 22 22 21 22 24 25 26 25 26 25 25 25 26 26 27 25  
RH 53 74 81 75 54 44 46 61 72 81 88 81 59 50 52 64 72 81 85  
WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW  
WIND SPD 10 10 9 9 9 11 13 10 9 11 10 10 12 14 16 11 11 9 10  
WIND GUST 23  
CLOUDS SC SC SC BK BK OV OV OV OV OV OV OV OV OV OV BK BK BK BK  
POP 12HR 10 40 60 40 30  
QPF 12HR 0 0.01 0.03 0.02 0  
SNOW 12HR 00-00 00-00 T T 00-00  
RAIN SHWRS S S C  
SNOWSHWRS S S C C L C C C S S C C S S S  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 47 26 52 27 58 31 52 27 57  
TEMP 42 46 35 28 43 51 37 29 48 56 41 32 44 50 37 29 48 56  
DEWPT 25 24 26 23 22 19 22 20 24 23 28 26 25 21 25 23 25 22  
PWIND DIR NW N NW NE S N NW N SE  
WIND CHAR GN GN GN GN LT GN GN GN LT  
AVG CLOUDS SC SC SC FW FW FW FW FW FW FW SC SC SC SC FW FW FW FW  
POP 12HR 20 10 5 0 10 30 20 10 10  
RAIN SHWRS S S C C S S  
SNOWSHWRS S S C S  
 

 
 
WYZ006-141100-  
WORLAND-WASHAKIE WY  
43.97N 107.95W ELEV. 4227 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 25 40 27 41 28  
TEMP 28 27 25 30 36 39 39 33 31 29 27 31 37 40 40 34 32 30 28  
DEWPT 15 21 21 21 20 19 20 23 25 25 25 26 27 26 27 26 27 27 25  
RH 58 78 84 69 52 44 46 66 78 85 92 81 67 57 59 72 81 88 88  
WIND DIR NW NW NW NW NW N N NW N N NW NW N NW NW NW NW NW NW  
WIND SPD 9 9 9 8 8 9 10 10 9 10 9 10 10 11 12 9 9 8 9  
WIND GUST 18  
CLOUDS SC BK BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV BK BK  
POP 12HR 20 60 80 60 30  
QPF 12HR 0 0.01 0.12 0.06 0  
SNOW 12HR 00-00 T 1 1 00-00  
RAIN SHWRS S S C  
SNOWSHWRS C C C C L L D L L L S S C C C C S  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 46 25 50 24 56 31 52 26 57  
TEMP 41 45 32 27 41 49 32 26 47 55 39 32 44 50 35 28 49 56  
DEWPT 26 25 26 23 23 20 23 20 25 24 29 27 28 24 26 24 29 25  
PWIND DIR NW NW NW W SW NW NW W S  
WIND CHAR GN GN GN LT LT GN GN GN LT  
AVG CLOUDS BK BK SC SC FW FW FW FW FW FW SC SC SC SC SC FW FW FW  
POP 12HR 20 10 10 0 5 20 20 10 10  
RAIN SHWRS S S S S S S  
SNOWSHWRS S S S S  
 

 
 
WYZ005-141100-  
HOT SPRINGS COUNTY AIRPORT-HOT SPRINGS WY  
43.71N 108.39W ELEV. 4902 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 23 36 25 37 26  
TEMP 26 24 24 28 33 36 35 30 28 26 26 29 34 37 36 31 29 27 26  
DEWPT 16 20 20 21 21 19 20 22 24 25 25 26 27 27 26 24 24 23 22  
RH 65 84 84 75 61 50 54 72 85 96 96 88 75 67 67 75 81 85 85  
WIND DIR N N N N N NE N N N N N N N N N NW NW NW NW  
WIND SPD 10 9 9 8 10 10 11 9 10 11 10 10 12 14 13 10 11 9 10  
WIND GUST 21  
CLOUDS SC BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV  
POP 12HR 30 70 90 70 40  
QPF 12HR 0.01 0.03 0.27 0.10 0.07  
SNOW 12HR 00-00 T 3 1 1  
SNOWSHWRS S C C C C D D D D L L C C C C C C C  
WIND CHILL 15  
MIN CHILL 15 14 14 26 19 15 15 26 19 16  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 42 24 46 23 54 30 48 25 54  
TEMP 38 40 30 27 40 44 30 26 46 52 37 32 44 47 33 29 48 53  
DEWPT 27 25 23 22 24 21 20 18 26 26 28 26 29 26 25 23 29 28  
PWIND DIR N N NW W SE NW N NW S  
WIND CHAR GN GN GN GN LT GN GN GN LT  
AVG CLOUDS BK SC SC SC SC FW FW FW FW FW SC SC BK SC SC SC FW SC  
POP 12HR 30 20 10 0 5 20 30 10 10  
RAIN SHWRS S S S S S C  
SNOWSHWRS C S S S S S  
 

 
 
WYZ010-141100-  
BUFFALO-JOHNSON WY  
44.38N 106.72W ELEV. 4968 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 20 34 26 34 27  
TEMP 24 22 21 26 31 34 33 28 28 27 27 30 32 34 33 29 28 28 27  
DEWPT 16 19 17 20 21 20 23 25 25 25 24 26 26 26 26 25 24 24 22  
RH 71 88 84 78 66 56 66 88 88 92 88 85 78 72 75 85 85 85 81  
WIND DIR N N N N N N N N N N N N N N N N N N N  
WIND SPD 10 6 9 10 9 9 12 10 8 6 9 11 12 12 12 9 8 10 11  
WIND GUST 19  
CLOUDS SC BK BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV  
POP 12HR 20 50 70 70 60  
QPF 12HR 0 0.01 0.10 0.24 0.10  
SNOW 12HR 00-00 00-00 1 3 1  
SNOWSHWRS S S S S L L L L L L L L L L C C C  
WINTER STORM A A A A A A A A A A  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 38 25 43 27 51 30 42 26 50  
TEMP 36 36 30 28 38 41 32 30 46 47 37 32 38 40 32 30 45 48  
DEWPT 27 26 24 18 23 24 22 17 25 27 27 24 26 25 22 18 23 26  
PWIND DIR N N NW NW NW NW N NW S  
WIND CHAR BZ GN GN GN GN GN GN GN GN  
AVG CLOUDS OV BK BK SC SC SC SC FW FW SC SC BK BK SC SC FW FW FW  
POP 12HR 50 20 10 5 10 30 30 10 10  
RAIN SHWRS C C S  
SNOWSHWRS C C S C C C S  
 

 
 
WYZ012-141100-  
RENDEZVOUS MOUNTAIN-TETON WY  
43.59N 110.89W ELEV. 10318 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 13 28 14 24 16  
TEMP 13 16 14 18 25 28 24 18 16 16 14 18 22 24 22 18 17 17 16  
DEWPT 8 12 10 13 15 17 17 15 14 13 12 14 14 15 16 14 14 13 12  
RH 80 84 84 80 65 63 74 88 92 88 92 84 71 68 77 84 88 84 84  
WIND DIR E E E E E E E E E E E NE N N N N NE NE NE  
WIND SPD 23 21 23 19 17 16 16 17 16 12 11 9 4 6 9 11 11 11 11  
WIND GUST 33 32 32 27 24 23  
CLOUDS BK BK OV OV OV OV OV OV OV OV OV OV BK BK BK BK BK SC SC  
POP 12HR 60 80 70 50 40  
QPF 12HR 0.01 0.23 0.16 0.11 0.04  
SNOW 12HR T 2 2 1 T  
SNOWSHWRS C L D D D L L L L C C C C C C S S S  
OBVIS BS BS  
WIND CHILL -6 -2 -5 2 12 16 11 3 1 2 0 7 5 4 4 3  
MIN CHILL -6 -5 -4 11 1 0 0 12 4 3  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 26 12 28 14 32 18 32 17 34  
TEMP 24 22 15 13 24 25 17 16 28 28 21 19 29 28 20 20 32 32  
DEWPT 14 13 9 7 8 10 8 7 13 16 14 13 17 17 14 14 16 18  
PWIND DIR NE NE NE N NW W NW NE SW  
WIND CHAR GN GN GN GN GN GN GN GN GN  
AVG CLOUDS SC SC SC FW FW SC FW CL CL SC SC SC SC SC FW FW FW SC  
POP 12HR 40 20 10 5 10 10 30 10 20  
SNOWSHWRS S C S S C S  
 

 
 
WYZ023-141100-  
AFTON-LINCOLN WY  
42.71N 110.94W ELEV. 6201 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 24 39 22 37 23  
TEMP 30 27 25 28 35 38 39 32 29 25 23 25 33 36 37 31 28 26 24  
DEWPT 20 22 23 25 26 25 25 24 24 22 22 24 27 27 27 25 24 23 21  
RH 66 81 92 88 69 59 57 72 81 88 96 96 78 69 67 78 85 88 88  
WIND DIR E E E E SE E SE E E E E SW W NW NW W SW S E  
WIND SPD 8 4 8 8 6 4 4 3 3 3 2 2 3 5 4 2 1 2 2  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV BK OV OV OV  
POP 12HR 80 80 80 60 40  
QPF 12HR 0.05 0.13 0.19 0.10 0.09  
SNOW 12HR T T 1 1 1  
RAIN SHWRS D D  
SNOWSHWRS C L D L D D D D D L L L C C C C C C S  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 40 19 44 18 49 23 50 23 53  
TEMP 36 40 29 20 33 42 29 21 38 46 33 27 42 48 35 26 43 51  
DEWPT 27 26 24 18 20 21 21 16 22 24 25 22 26 27 27 22 27 28  
PWIND DIR S SE NE NE NW SW W NE S  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS BK BK BK SC SC SC FW FW FW FW FW FW SC SC FW FW FW SC  
POP 12HR 30 20 10 5 5 5 20 10 20  
RAIN SHWRS C S S S  
SNOWSHWRS S C S S  
 

 
 
WYZ004-141100-  
POWELL-PARK WY  
44.87N 108.79W ELEV. 5092 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 20 34 26 36 28  
TEMP 23 22 20 24 31 34 33 29 28 27 26 29 34 36 35 31 30 29 28  
DEWPT 15 18 19 22 22 21 23 24 24 24 25 25 23 20 20 22 21 21 22  
RH 71 84 96 92 69 58 66 81 85 88 96 85 64 52 54 69 69 72 78  
WIND DIR N NW NW N NW N N NW NW NW N N N N N N N N N  
WIND SPD 16 18 18 17 16 16 18 14 13 17 16 18 17 18 18 14 13 14 14  
WIND GUST 24 27 25 25 23 25 21 24 25 25 27 26 21 21  
CLOUDS FW SC BK BK OV OV OV OV OV OV OV OV OV OV OV BK BK BK BK  
POP 12HR 10 40 50 40 30  
QPF 12HR 0 0.01 0.04 0.03 0  
SNOW 12HR 00-00 T T T 00-00  
SNOWSHWRS S S S S C C C C C C S S C C S S S  
WIND CHILL 10 7 5 10 20 22 18 17 14 13 17 23 24 20 19 18 16  
MIN CHILL 10 5 5 21 17 13 13 23 19 16  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 41 28 48 28 55 32 47 29 54  
TEMP 38 39 33 30 42 47 35 31 47 52 39 34 42 46 36 32 48 53  
DEWPT 22 20 22 21 21 17 20 19 21 22 28 27 24 20 22 20 24 22  
PWIND DIR N N NW W SE N N NW SE  
WIND CHAR BZ GN GN GN LT BZ GN GN GN  
AVG CLOUDS BK SC SC SC SC FW FW FW FW SC SC SC SC SC FW FW FW FW  
POP 12HR 20 10 5 0 20 30 20 10 10  
RAIN SHWRS S S C C S S  
SNOWSHWRS S S C C S S  
 

 
 
WYZ004-141100-  
COWLEY-BIG HORN WY  
44.91N 108.45W ELEV. 4090 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 23 39 28 40 30  
TEMP 28 25 23 27 34 39 39 34 32 30 28 32 36 40 40 36 33 32 30  
DEWPT 18 17 19 20 20 20 21 24 24 24 25 27 24 23 24 25 25 25 26  
RH 66 71 84 74 56 46 48 66 72 78 88 81 61 50 52 64 72 75 85  
WIND DIR N N NW NW W N N N N NW N N N N N N N N N  
WIND SPD 10 6 6 5 5 8 12 9 5 8 8 9 10 13 13 8 8 6 9  
WIND GUST 20  
CLOUDS FW SC SC SC OV OV OV OV OV OV OV OV OV OV OV BK BK BK BK  
POP 12HR 10 30 50 40 30  
QPF 12HR 0 0.01 0.02 0.01 0.01  
SNOW 12HR 00-00 00-00 T T 00-00  
RAIN SHWRS S C  
SNOWSHWRS S C C C C C C S S C C C C S  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 46 28 53 29 59 33 52 29 58  
TEMP 41 45 35 31 44 52 37 31 49 57 41 35 44 51 38 32 50 58  
DEWPT 26 25 26 24 23 21 24 22 25 27 31 29 27 23 25 23 27 24  
PWIND DIR N N NW NE SW N N N SE  
WIND CHAR GN GN GN LT LT GN GN LT LT  
AVG CLOUDS BK SC SC FW FW FW FW FW FW SC SC SC SC SC FW FW FW FW  
POP 12HR 20 10 5 0 10 30 20 10 10  
RAIN SHWRS S C C S S  
SNOWSHWRS S C S  
 

 
 
WYZ016-141100-  
DUBOIS-FREMONT WY  
43.55N 109.69W ELEV. 7291 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 15 29 20 36 22  
TEMP 24 17 16 20 27 29 28 24 22 21 20 26 34 36 35 29 25 24 23  
DEWPT 14 11 11 14 17 18 18 18 17 17 16 19 19 18 18 18 16 16 15  
RH 65 77 80 77 65 63 66 77 81 84 84 74 54 47 49 63 68 71 71  
WIND DIR E E E E E E E E E E E E E E E E E E NE  
WIND SPD 14 17 16 17 19 19 14 11 9 9 6 6 9 12 10 8 5 8 6  
WIND GUST 23 25 23 27 26 21  
CLOUDS BK BK OV OV OV OV OV OV OV OV OV OV OV OV BK BK BK BK BK  
POP 12HR 70 80 80 50 40  
QPF 12HR 0.01 0.10 0.12 0.03 0.03  
SNOW 12HR T 1 1 T T  
SNOWSHWRS S C D D D D D D D L C C C C C C C C C  
OBVIS BS  
WIND CHILL 11 1 1 5 14 16 16 13  
MIN CHILL 11 0 -1 15 12 11 11 26 18 14  
WINTER STORM A A A A A A A A A A  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 38 19 42 21 49 28 46 25 51  
TEMP 36 37 26 21 36 40 27 23 44 47 34 31 43 43 32 29 47 49  
DEWPT 17 16 17 13 12 14 14 12 17 19 22 22 22 22 21 20 21 21  
PWIND DIR E NE NE N NW W N E W  
WIND CHAR GN GN GN LT GN GN LT LT GN  
AVG CLOUDS BK SC SC SC FW SC FW CL CL FW SC SC SC SC SC SC FW SC  
POP 12HR 30 20 10 0 5 20 30 10 20  
RAIN SHWRS S S C S  
SNOWSHWRS C C S S S S C  
 

 
 
WYZ027-141100-  
KEMMERER-LINCOLN WY  
41.83N 110.56W ELEV. 7285 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 21 38 23 39 23  
TEMP 28 23 21 26 34 38 37 30 27 25 23 27 36 39 38 31 28 25 23  
DEWPT 16 19 19 22 25 26 25 24 23 23 22 23 23 24 23 22 22 22 21  
RH 60 84 92 85 69 62 61 78 85 92 96 85 59 54 54 69 78 88 92  
WIND DIR E E E E E E E E E E E SE SE S W SE SE SE E  
WIND SPD 25 20 25 18 23 21 19 17 11 8 8 4 5 4 5 4 5 4 8  
WIND GUST 37 31 34 25 32 31 27 24  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV OV BK BK BK BK BK  
POP 12HR 90 90 80 40 20  
QPF 12HR 0.15 0.21 0.13 0.04 0  
SNOW 12HR 2 1 1 T 00-00  
SNOWSHWRS L D D D D D D D L L C C C C S S S S S  
OBVIS BS BS BS BS  
WIND CHILL 13 8 4 13 22 27 18  
MIN CHILL 12 4 5 23 17 14 15 31 22 14  
WINTER WEATH Y Y Y Y Y Y Y Y Y Y Y Y  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 40 20 42 20 50 27 54 27 56  
TEMP 37 38 27 22 35 39 27 22 41 47 33 28 46 50 33 28 48 53  
DEWPT 22 21 22 19 20 18 19 16 22 23 24 23 26 25 26 23 27 25  
PWIND DIR E E E E NW W W N SE  
WIND CHAR GN GN GN LT LT GN LT LT LT  
AVG CLOUDS BK SC SC SC SC SC FW CL CL FW FW FW FW SC FW FW FW SC  
POP 12HR 20 5 10 5 0 5 20 5 10  
RAIN SHWRS S  
SNOWSHWRS S S  
 

 
 
WYZ023-141100-  
ALPINE-LINCOLN WY  
43.18N 111.04W ELEV. 5634 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 24 43 25 40 26  
TEMP 30 28 25 28 37 42 43 36 32 29 26 28 36 39 40 35 31 29 27  
DEWPT 22 24 24 25 27 27 28 29 28 26 25 26 29 29 30 29 27 26 24  
RH 72 85 96 88 67 55 55 75 85 88 96 92 75 67 67 78 85 88 88  
WIND DIR E E NE E E E E NE NE NE NE N NW NW NW NW NE E NE  
WIND SPD 10 9 12 12 9 8 8 6 5 4 4 2 3 5 6 2 3 2 4  
CLOUDS BK BK OV OV OV OV OV OV OV OV OV OV OV OV BK BK BK BK BK  
POP 12HR 60 80 70 50 40  
QPF 12HR 0.03 0.09 0.14 0.06 0.03  
SNOW 12HR T T 1 T 00-00  
RAIN SHWRS L L C C  
SNOWSHWRS S C D L L L L L L C C C C C C C C S  
WIND CHILL 14 17  
MIN CHILL 21 14 12 26 20 21 28 22  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 44 20 47 21 52 26 52 25 55  
TEMP 39 44 30 22 38 45 31 23 41 49 35 27 44 50 35 28 46 53  
DEWPT 27 29 24 20 21 23 21 18 24 26 26 23 28 30 27 24 30 29  
PWIND DIR NE NE NE NE N SW N NE S  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS BK SC SC FW FW SC FW CL CL FW FW FW FW SC FW FW FW SC  
POP 12HR 30 20 10 5 5 10 20 5 20  
RAIN SHWRS C S S S  
SNOWSHWRS S C S  
 

 
 
WYZ023-141100-  
COKEVILLE-LINCOLN WY  
42.05N 110.97W ELEV. 6270 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 23 40 22 42 23  
TEMP 28 26 24 28 36 40 40 32 28 25 23 28 37 42 42 33 29 26 24  
DEWPT 20 23 21 23 23 23 23 23 23 23 22 24 25 27 27 25 25 24 23  
RH 71 88 88 81 59 50 50 69 81 92 96 85 61 55 55 72 85 92 96  
WIND DIR E E E E E E E E SE E SE S S W W NW SE SE E  
WIND SPD 16 13 19 19 17 14 13 11 6 4 4 4 3 6 6 3 3 3 5  
WIND GUST 25 21 27 26 25  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV OV BK BK BK BK BK  
POP 12HR 80 80 70 40 30  
QPF 12HR 0.07 0.11 0.04 0.05 0  
SNOW 12HR 1 T 1 T 00-00  
RAIN SHWRS L L C C  
SNOWSHWRS L D D L L L L L L C C C C C C C S S S  
WIND CHILL 16 14 10 15  
MIN CHILL 16 10 8 29 21 17 16 25 17  
WINTER WEATH Y Y Y Y Y Y Y Y Y Y Y Y  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 43 20 46 18 53 25 56 25 58  
TEMP 38 43 27 20 36 43 27 19 42 49 32 26 47 52 32 25 48 55  
DEWPT 25 25 23 18 20 21 22 16 22 23 26 22 26 26 27 22 27 27  
PWIND DIR SE E E E NW W SW NE S  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS BK SC SC SC SC SC FW CL CL FW FW FW FW SC FW FW FW SC  
POP 12HR 20 10 10 5 5 5 20 5 10  
RAIN SHWRS S S  
SNOWSHWRS S S  
 

 
 
WYZ028-141100-  
GREEN RIVER-SWEETWATER WY  
41.46N 109.49W ELEV. 7182 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 22 42 24 42 24  
TEMP 29 25 23 28 37 41 42 35 30 27 25 29 38 42 42 35 30 27 25  
DEWPT 14 17 18 20 24 25 25 23 22 22 23 22 23 22 22 19 19 19 19  
RH 53 71 81 71 59 52 50 61 72 81 92 75 54 44 44 52 63 71 78  
WIND DIR E E E E E E E NE NE NE NE NE NE NE NE E E E NE  
WIND SPD 25 26 24 24 27 27 26 20 12 12 9 8 10 10 12 10 9 4 8  
WIND GUST 37 39 33 33 39 39 36 28  
CLOUDS OV OV OV BK BK BK OV OV OV OV OV OV OV BK BK SC BK BK BK  
POP 12HR 60 60 70 40 20  
QPF 12HR 0.06 0.04 0.10 0.02 0  
SNOW 12HR T T T 00-00 00-00  
RAIN SHWRS C S  
SNOWSHWRS C L L C C C L L L C C C C C S S S  
WIND CHILL 15 9 7 14 25 30 24 16  
MIN CHILL 14 7 6 27 20 15 14 22 16  
WINTER WEATH Y Y Y Y Y Y Y Y Y Y Y Y  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 44 23 46 23 54 29 57 30 61  
TEMP 39 43 30 24 39 44 31 24 44 53 37 31 49 54 39 31 54 59  
DEWPT 20 19 19 19 17 15 17 17 19 15 22 22 25 23 26 24 27 21  
PWIND DIR NE NE NE E NW W NE NE S  
WIND CHAR GN GN GN GN LT LT LT LT LT  
AVG CLOUDS BK SC SC SC SC SC FW FW FW FW FW FW SC SC SC FW FW FW  
POP 12HR 20 5 10 0 0 5 20 5 10  
RAIN SHWRS S  
SNOWSHWRS S  
 

 
 
WYZ017-141100-  
SHOSHONI-FREMONT WY  
43.25N 108.12W ELEV. 4817 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 25 38 27 39 26  
TEMP 31 28 25 30 35 38 38 33 31 29 27 31 36 39 39 33 31 28 26  
DEWPT 16 19 20 21 21 21 21 22 24 25 25 26 28 28 27 25 25 24 23  
RH 53 68 81 69 56 50 50 63 75 85 92 81 72 64 62 72 78 85 88  
WIND DIR NE N N N NE NE NE NE N N N N N N N N N N N  
WIND SPD 12 10 9 8 10 9 10 13 12 14 12 12 11 12 10 6 8 6 8  
WIND GUST 19  
CLOUDS OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV  
POP 12HR 40 80 90 70 30  
QPF 12HR 0.01 0.07 0.29 0.07 0.03  
SNOW 12HR T T 3 1 T  
RAIN SHWRS C C  
SNOWSHWRS S S C L L L D D D D L L C C C C C C C  
WIND CHILL 18 16  
MIN CHILL 21 16 16 29 21 16 16 29 24 18  
WINTER STORM A A A A A A A A A A  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 43 24 45 21 52 28 49 25 54  
TEMP 38 43 30 26 38 43 29 23 41 50 36 31 41 46 33 27 45 53  
DEWPT 27 27 23 23 26 21 19 17 25 25 25 26 30 26 25 23 30 27  
PWIND DIR N N NW S SW W N E SE  
WIND CHAR GN LT LT LT LT LT LT LT LT  
AVG CLOUDS OV BK SC SC SC SC FW FW FW FW SC SC BK SC SC SC FW FW  
POP 12HR 30 10 10 0 5 20 20 10 10  
RAIN SHWRS C S S S S  
SNOWSHWRS C S S S S  
 

 
 
WYZ005-141100-  
THERMOPOLIS-HOT SPRINGS WY  
43.66N 108.21W ELEV. 4592 FT  
1054 PM MDT TUE APR 13 2021  
 
DATE 04/13/21 WED 04/14/21 THU 04/15/21 FRI  
MDT 3HRLY 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06  
UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12  
 
MIN/MAX 24 38 27 38 28  
TEMP 28 26 24 28 34 37 37 33 30 28 27 30 35 38 38 33 31 29 28  
DEWPT 14 18 18 21 21 20 21 23 25 25 25 27 27 26 26 25 25 24 24  
RH 55 71 77 75 58 50 52 66 81 88 92 88 72 62 62 72 78 81 85  
WIND DIR N N N N N N N N N N N N N N N NW NW NW N  
WIND SPD 9 6 6 8 9 9 10 9 9 10 8 9 10 13 13 6 9 8 9  
WIND GUST 20  
CLOUDS SC BK OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV OV  
POP 12HR 30 70 90 70 40  
QPF 12HR 0.01 0.03 0.29 0.13 0.09  
SNOW 12HR 00-00 T 3 1 1  
RAIN SHWRS C C  
SNOWSHWRS S C C C C D D D D L L C C C C C C C  
 
DATE 04/16/21 SAT 04/17/21 SUN 04/18/21 MON 04/19/21 TUE 04/20/21  
MDT 6HRLY 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 44 25 48 23 55 31 51 26 56  
TEMP 39 43 32 28 42 47 32 26 47 53 38 33 45 49 35 29 50 56  
DEWPT 27 26 25 22 25 23 21 18 26 26 28 27 29 26 26 23 30 29  
PWIND DIR N NW NW W W NW N W S  
WIND CHAR GN GN GN LT LT GN LT LT LT  
AVG CLOUDS BK BK SC SC SC FW FW FW FW FW SC SC BK SC SC FW FW FW  
POP 12HR 30 20 5 0 5 20 20 10 10  
RAIN SHWRS S S S S S S  
SNOWSHWRS C S S S S S  
 

 
 
BELOW IS A WEATHER ELEMENT KEY FOR THIS PRODUCT  
 
DAY 1 THROUGH DAY 3...  
MAX/MIN TEMP OR MIN/MAX TEMP(F).....MAXIMUM/MINIMUM AIR TEMPERATURE  
TEMP(F).............................AIR TEMPERATURE  
DEWPT(F)............................DEW POINT TEMPERATURE  
RH(%)...............................RELATIVE HUMIDITY  
WIND DIR(8 POINT COMPASS)...........WIND DIRECTION  
WIND SPD(MPH).......................WIND SPEED  
CLOUDS(CAT).........................CLOUD COVER CATEGORY  
CL.....CLEAR/SUNNY.......................0% TO =< 10%  
FW.....MOSTLY CLEAR/MOSTLY SUNNY......> 10% TO =< 30%  
SC.....PARTLY CLOUDY/PARTLY SUNNY.....> 30% TO =< 60%  
BK.....MOSTLY CLOUDY..................> 60% TO =< 80%  
OV.....CLOUDY.........................> 80% TO =< 100%  
POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION  
QPF 12HR(IN.).......................AMOUNT OF LIQUID PRECIPITATION  
SNOW 12HR(MIN-MAX - IN.)............RANGE OF SNOWFALL  
WEATHER...  
TYPE...  
RAIN...........RAIN  
RAIN SHWRS.....RAIN SHOWERS  
SPRINKLES......SPRINKLES  
TSTMS..........THUNDERSTORMS  
DRIZZLE........DRIZZLE  
SNOW...........SNOW  
SNOWSHWRS......SNOW SHOWERS  
FLURRIES.......SNOW FLURRIES  
SLEET..........SLEET  
FRZG RAIN......FREEZING RAIN  
FRZG DRZL......FREEZING DRIZZLE  
COVERAGE...  
IS.............ISOLATED  
SC.............SCATTERED  
NM.............NUMEROUS  
O..............OCCASIONAL  
S..............SLIGHT CHANCE  
C..............CHANCE  
L..............LIKELY  
WD.............WIDESPREAD  
D..............DEFINITE  
AR.............AREAS  
PA.............PATCHY  
OBVIS...............................OBSTRUCTION TO VISIBILITY  
F.......FOG  
PF......PATCHY FOG  
F+......DENSE FOG  
PF+.....PATCHY DENSE FOG  
H.......HAZE  
BS......BLOWING SNOW  
K.......SMOKE  
BD......BLOWING DUST  
VA......VOLCANIC ASH  
DAY 4 THROUGH DAY 7...  
MAX/MIN TEMP OR MIN/MAX TEMP(F).....MAXIMUM/MINIMUM AIR TEMPERATURE  
TEMP(F).............................AIR TEMPERATURE  
DEWPT(F)............................DEW POINT TEMPERATURE  
PWIND DIR(8 POINT COMPASS)..........PREDOMINANT WIND DIRECTION IN 12HR PERIOD  
WIND CHAR(MAX SUSTAINED IN 12HR)....WIND CHARACTERISTIC  
LT.....LIGHT; < 8 MPH  
GN.....GENTLE; 8 - 14 MPH  
BZ.....BREEZY; 15 - 22 MPH  
WY.....WINDY; 23 - 30 MPH  
VW.....VERY WINDY; 31 - 39 MPH  
SD.....STRONG/DAMAGING; >= 40 MPH  
AVG CLOUDS(CAT).....................AVERAGE CLOUD COVER CATEGORY  
SEE DAY 1 THROUGH 3 WEATHER DESCRIPTIONS  
POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION  
WEATHER...  
SEE DAY 1 THROUGH 3 WEATHER DESCRIPTIONS  
 
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