336  
FOUS51 KLWX 160234  
PFMLWX  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
934 PM EST FRI DEC 15 2017  
 
VAZ054-160900-  
REAGAN NATIONAL AIRPORT-ARLINGTON VA  
38.86N 77.03W ELEV. 66 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 45 31 48 38  
TEMP 26 29 29 31 38 43 43 38 36 35 34 34 41 46 46 43 42 41 40 41  
DEWPT 23 20 20 20 23 24 26 27 27 27 26 27 30 31 32 34 35 37 35 35  
RH 88 69 69 63 54 47 51 64 69 72 72 75 65 55 58 70 76 85 82 79  
WIND DIR SW W W SW SW SW SW SW W W SW E S S S S SW SW W W  
WIND SPD 4 9 9 8 12 12 10 8 5 3 2 3 5 5 6 6 4 3 5 5  
CLOUDS FW FW SC B1 B1 SC SC FW FW FW FW SC SC B2 B2 OV B2 B2 B1 B1  
POP 12HR 5 5 0 10 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S  
SNOW  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 54 42 60 40 48 33 49 40 57  
TEMP 52 48 45 45 58 50 46 41 47 41 37 36 47 45 43 43 55 49  
DEWPT 40 41 42 40 44 42 36 28 24 25 26 27 29 32 36 38 41 43  
PWIND DIR SW SW SW W NW N SE S SW  
WIND CHAR LT LT LT LT GN LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 B1 SC FW FW FW SC SC SC SC SC SC B1 B2  
POP 12HR 10 10 10 5 5 10 10 10 20  
RAIN SHWRS S S  
 

 
MDZ013-160900-  
BALTIMORE/WASHINGTON AIRPORT-ANNE ARUNDEL MD  
39.19N 76.67W ELEV. 154 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 44 29 46 35  
TEMP 21 28 27 29 36 42 42 37 35 33 32 32 39 44 44 41 39 38 37 38  
DEWPT 19 19 19 19 22 23 24 26 26 25 25 25 29 30 32 34 34 35 34 33  
RH 92 68 71 66 56 46 48 64 69 72 75 75 67 57 62 76 82 89 89 82  
WIND DIR SW W W SW SW W SW W W NW SW SE S SE SE SE SE S W W  
WIND SPD 5 10 9 8 11 12 10 6 4 3 2 3 3 4 4 3 2 1 3 1  
CLOUDS FW FW SC B1 B1 B1 SC SC FW FW SC SC SC B1 B2 OV B2 B2 B1 B1  
POP 12HR 10 5 0 10 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S  
SNOW  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 51 39 58 37 47 31 47 37 56  
TEMP 49 45 42 42 56 48 43 39 46 39 36 34 45 42 40 40 54 48  
DEWPT 38 39 40 38 43 40 34 26 24 23 24 24 27 30 34 36 40 43  
PWIND DIR SW SW SW W NW NW SE S SW  
WIND CHAR LT LT LT GN GN LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 SC SC FW FW FW FW SC SC SC SC SC B1 B2  
POP 12HR 10 10 10 5 5 10 10 10 20  
RAIN SHWRS S S  
 

 
MDZ011-160900-  
BALTIMORE INNER HARBOR-BALTIMORE CITY MD  
39.28N 76.61W ELEV. 20 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 44 31 46 37  
TEMP 23 28 28 30 37 42 42 38 36 35 34 33 39 44 45 42 40 40 39 39  
DEWPT 19 19 19 19 21 23 25 26 27 26 25 25 29 29 32 34 36 36 34 34  
RH 84 68 68 63 52 46 50 62 69 69 69 72 67 55 60 73 85 85 82 82  
WIND DIR SW W W SW SW W SW W W NW SW SE S S SE SE SE S W W  
WIND SPD 4 9 8 8 11 12 10 6 4 3 2 3 3 4 4 3 2 1 3 1  
CLOUDS FW FW SC SC B1 B1 SC FW FW FW SC SC SC B1 B2 OV OV B2 B1 B1  
POP 12HR 10 5 0 10 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S  
SNOW  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 51 41 57 38 46 32 47 39 56  
TEMP 49 46 44 44 55 48 44 39 45 39 36 34 45 43 41 42 54 48  
DEWPT 38 40 40 39 43 40 34 27 24 23 24 24 27 30 34 36 40 43  
PWIND DIR SW SW SW W NW NW SW S S  
WIND CHAR LT LT LT GN GN LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 SC SC FW FW FW FW SC SC SC SC SC B1 B2  
POP 12HR 10 20 10 5 5 10 10 10 20  
RAIN SHWRS S S S S  
 

 
WVZ052-160900-  
MARTINSBURG AIRPORT-BERKELEY WV  
39.41N 77.98W ELEV. 558 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 45 27 46 33  
TEMP 31 26 25 27 36 43 42 36 34 32 31 30 38 44 44 40 38 37 36 36  
DEWPT 16 17 17 18 22 24 26 25 25 24 24 23 28 29 31 32 32 32 31 31  
RH 53 68 71 68 56 47 53 64 69 72 75 75 67 55 60 73 79 82 82 82  
WIND DIR W W SW SW SW W W W W SW SW S S S SE S W S SW W  
WIND SPD 18 9 6 8 11 13 9 5 3 3 3 3 2 3 4 3 2 1 2 1  
CLOUDS SC FW SC B1 B1 B1 SC FW FW FW FW SC SC B2 OV OV OV B2 B2 B2  
POP 12HR 5 5 0 20 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S S S  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 52 38 58 34 45 28 47 34 55  
TEMP 50 45 42 41 56 46 41 36 44 37 33 31 45 41 38 37 53 45  
DEWPT 40 39 38 37 42 37 31 23 21 21 22 22 26 28 30 31 39 38  
PWIND DIR SW SW W W NW W S S S  
WIND CHAR LT LT LT GN GN LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 B1 SC FW FW FW SC SC SC SC SC B1 B1 B2  
POP 12HR 10 20 10 5 5 10 10 20 30  
RAIN SHWRS S S S S C C  
SNOWSHWRS S S  
 

 
VAZ506-160900-  
WASHINGTON DULLES AIRPORT-LOUDOUN VA  
38.96N 77.45W ELEV. 321 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 45 28 48 35  
TEMP 24 25 24 26 35 42 42 37 34 33 32 31 39 46 46 42 40 39 38 38  
DEWPT 20 18 18 18 21 23 25 25 25 25 24 25 28 30 31 33 33 34 33 33  
RH 84 74 77 71 56 46 50 61 69 72 72 78 64 53 55 70 76 82 82 82  
WIND DIR S W W SW SW SW SW W W W SW SE S S SE S S SW W W  
WIND SPD 4 6 5 8 10 12 9 5 3 2 2 2 2 5 4 3 2 1 3 1  
CLOUDS FW FW SC B1 SC SC SC FW FW FW FW SC SC B2 OV OV B2 B2 B1 B1  
POP 12HR 5 5 0 10 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S  
SNOW  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 53 39 59 37 47 30 48 37 56  
TEMP 51 46 43 42 57 48 43 39 46 39 35 33 46 43 40 40 54 47  
DEWPT 39 40 39 38 43 40 33 25 23 23 24 24 27 30 34 35 40 42  
PWIND DIR SW SW SW W NW N S S S  
WIND CHAR LT LT LT GN GN LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 B1 SC FW FW FW SC SC SC SC SC SC B1 B2  
POP 12HR 10 10 10 5 5 10 10 10 20  
RAIN SHWRS S S  
 

 
VAZ037-160900-  
CHARLOTTESVILLE AIRPORT-ALBEMARLE VA  
38.14N 78.45W ELEV. 640 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 27 48 28 50 35  
TEMP 27 27 27 29 38 45 45 38 36 34 32 32 40 48 48 43 41 39 38 39  
DEWPT 20 18 18 19 22 24 25 25 24 25 23 24 28 29 30 33 33 33 31 32  
RH 74 68 68 66 52 43 45 59 61 69 69 72 62 47 49 67 73 79 76 76  
WIND DIR W W SW SW SW SW SW SW W W W W S S S SW SW W W SW  
WIND SPD 1 4 4 5 8 9 8 5 4 3 2 2 1 3 4 3 3 2 3 2  
CLOUDS FW FW FW SC SC SC FW CL CL FW FW SC B1 B2 OV OV B2 B1 SC B1  
POP 12HR 5 5 0 10 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 58 40 62 36 52 29 51 35 57  
TEMP 55 49 45 44 60 50 44 39 50 41 36 33 49 43 40 39 55 47  
DEWPT 43 43 42 39 45 41 35 26 22 23 24 24 29 31 34 34 41 41  
PWIND DIR SW SW W W NW NE SE S SW  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS B1 B1 B1 B1 B1 B1 SC SC FW FW SC SC SC SC SC B1 B1 B2  
POP 12HR 10 10 10 5 10 20 10 20 30  
RAIN SHWRS S S S S C C  
SNOWSHWRS S S S S  
 

 
MDZ003-160900-  
HAGERSTOWN AIRPORT-WASHINGTON MD  
39.71N 77.73W ELEV. 705 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 26 43 28 44 34  
TEMP 29 27 26 28 35 41 41 36 34 32 31 31 37 42 42 39 38 37 36 36  
DEWPT 18 17 17 18 21 24 26 26 26 24 25 23 27 29 30 30 32 32 31 32  
RH 63 65 68 66 56 50 55 67 72 72 78 72 67 60 62 70 79 82 82 85  
WIND DIR SW W SW SW SW W W W W SW S S S S SE S S S SW SW  
WIND SPD 6 10 6 9 11 14 10 5 3 3 2 3 3 5 4 4 2 2 3 2  
CLOUDS SC FW SC B1 B1 B1 B1 SC SC SC SC SC SC B2 OV OV OV B2 B2 B2  
POP 12HR 5 5 0 30 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN C C S S  
RAIN SHWRS S  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 49 39 56 34 43 29 44 35 53  
TEMP 47 44 42 42 54 45 40 35 42 36 33 31 42 40 38 38 51 44  
DEWPT 39 38 38 37 42 37 30 23 20 21 22 22 24 27 30 32 39 38  
PWIND DIR SW SW W W NW W S S S  
WIND CHAR LT LT GN GN GN LT LT LT GN  
AVG CLOUDS B2 B2 B2 B1 B1 B1 SC FW FW FW SC SC SC SC SC B1 B2 B2  
POP 12HR 20 20 10 5 5 10 10 20 30  
RAIN SHWRS S S S S S S C C  
SNOWSHWRS S S  
 

 
MDZ017-160900-  
PATUXENT RIVER NAS MD  
38.29N 76.41W ELEV. 39 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 27 45 32 48 39  
TEMP 28 31 30 32 38 43 43 39 37 36 35 35 41 46 47 44 42 42 41 41  
DEWPT 23 23 22 22 23 24 26 28 30 29 30 29 33 34 35 36 37 37 37 37  
RH 81 72 72 66 54 47 51 64 75 75 82 78 73 63 63 73 82 82 85 85  
WIND DIR W W W W SW SW SW SW W W W E S S S S SW SW SW W  
WIND SPD 6 11 11 10 11 12 12 10 9 5 4 4 4 5 5 6 8 4 5 4  
CLOUDS FW FW FW SC B1 SC SC FW CL FW FW SC SC B1 B2 B2 B2 B2 SC B1  
POP 12HR 10 0 0 5 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S  
SNOW  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 53 43 58 40 49 34 49 40 57  
TEMP 51 48 46 45 56 49 45 41 48 42 38 36 47 45 43 43 55 50  
DEWPT 41 43 44 43 47 44 38 32 27 27 28 28 31 35 39 39 44 45  
PWIND DIR SW SW SW W NW N SE S S  
WIND CHAR LT LT LT GN GN LT LT GN GN  
AVG CLOUDS SC SC B1 B1 B1 B1 SC SC FW FW SC SC SC SC SC B1 B1 B2  
POP 12HR 5 10 20 5 5 10 10 10 20  
RAIN SHWRS S S S S  
 

 
WVZ502-160900-  
PETERSBURG WV  
38.99N 79.15W ELEV. 963 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 28 44 31 49 38  
TEMP 31 28 28 30 37 42 42 38 36 35 34 34 41 47 47 44 42 41 40 40  
DEWPT 18 19 19 20 23 26 26 24 24 25 25 24 28 30 31 32 32 33 34 36  
RH 58 68 68 66 56 53 53 57 61 66 69 66 59 51 53 62 67 73 79 85  
WIND DIR W W W SW W W W SW SW SW SW SW SW SW S SW W SW W SW  
WIND SPD 16 9 6 8 9 11 8 4 4 4 4 3 2 2 2 2 2 2 3 2  
CLOUDS SC SC SC SC SC SC FW FW FW FW FW B1 B1 OV OV OV OV B2 B2 B2  
POP 12HR 10 5 0 20 30  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S C C  
RAIN SHWRS S  
SNOW  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 53 43 56 35 45 31 52 38 58  
TEMP 51 48 46 45 55 46 41 37 44 38 35 34 50 45 42 41 56 47  
DEWPT 42 41 41 40 42 37 31 24 21 23 23 22 30 30 32 34 42 39  
PWIND DIR SW SW W W NW SW S S SW  
WIND CHAR LT LT GN GN GN LT LT LT LT  
AVG CLOUDS B2 B1 B2 B1 B1 B1 SC SC FW FW SC SC SC SC SC B1 B1 B2  
POP 12HR 20 30 20 10 10 10 10 20 30  
RAIN SHWRS S S C C S S S S C C  
SNOWSHWRS S S  
 

 
MDZ014-160900-  
ANNAPOLIS MD  
38.99N 76.49W ELEV. 7 FT  
934 PM EST FRI DEC 15 2017  
 
DATE 12/15/17 SAT 12/16/17 SUN 12/17/17 MON  
EST 3HRLY 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07  
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 26 44 32 46 37  
TEMP 27 29 28 31 37 42 42 38 37 35 35 34 40 44 45 42 40 40 39 39  
DEWPT 25 21 20 20 22 24 25 27 28 27 28 27 31 32 34 35 36 36 35 35  
RH 92 72 71 63 54 48 50 64 70 72 75 75 70 62 65 76 85 85 85 85  
WIND DIR W W W W SW SW SW SW W NW SE SE S SE SE S S S W W  
WIND SPD 3 11 11 9 12 12 11 9 5 4 4 4 3 4 4 4 3 2 4 2  
CLOUDS FW FW SC B1 B1 B1 SC FW FW FW FW SC SC B1 B2 OV B2 B2 B1 B1  
POP 12HR 10 5 0 10 20  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN S S  
SNOW  
 
DATE 12/18 TUE 12/19/17 WED 12/20/17 THU 12/21/17 FRI 12/22/17  
EST 6HRLY 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 52 41 57 39 46 33 47 39 56  
TEMP 50 47 44 44 55 48 44 40 45 40 37 35 45 43 41 42 54 49  
DEWPT 39 41 41 40 45 42 35 28 25 25 25 26 29 32 36 38 42 44  
PWIND DIR SW SW SW W NW NW SE S SW  
WIND CHAR LT LT LT GN GN LT LT LT GN  
AVG CLOUDS B1 B1 B1 B1 B1 SC SC FW FW FW FW SC SC SC SC SC B1 B2  
POP 12HR 10 10 10 5 5 10 10 10 20  
RAIN SHWRS S S  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page