697  
FOUS51 KLWX 180242  
PFMLWX  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1041 PM EDT SUN OCT 17 2021  
 
VAZ054-180900-  
REAGAN NATIONAL AIRPORT-ARLINGTON VA  
38.86N 77.03W ELEV. 66 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 50 67 49 72 54  
TEMP 55 53 51 52 60 64 64 58 55 52 50 49 60 68 70 63 60 57 55 56  
DEWPT 39 40 40 39 41 40 38 39 40 40 39 39 43 43 43 45 46 45 45 46  
RH 55 61 66 61 49 41 38 49 57 63 66 68 53 40 38 52 60 64 69 69  
WIND DIR W W W W NW NW NW NW NW NW NW W W W W W W W W W  
WIND SPD 8 6 8 9 13 13 12 8 8 6 5 5 9 10 10 6 5 5 5 5  
WIND GUST 24 25  
CLOUDS FW CL CL CL FW SC FW FW CL CL CL CL CL CL CL FW FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 75 54 75 57 69 52 64 48 63  
TEMP 73 65 59 55 73 68 63 59 67 62 56 53 62 57 52 49 61 56  
DEWPT 48 48 48 48 50 51 53 51 50 47 46 43 43 41 42 40 40 40  
PWIND DIR W SW SW W NW N NW NW NW  
WIND CHAR LT LT LT GN GN LT LT LT GN  
AVG CLOUDS CL CL CL CL FW SC SC SC SC B1 B1 B1 B1 SC SC SC FW FW  
POP 12HR 0 0 10 20 5 10 10 5 5  
RAIN SHWRS S  
 

 
MDZ013-180900-  
BALTIMORE/WASHINGTON AIRPORT-ANNE ARUNDEL MD  
39.19N 76.67W ELEV. 154 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 44 66 46 71 52  
TEMP 52 49 46 48 61 64 63 57 53 50 48 48 62 69 69 62 58 56 54 54  
DEWPT 41 41 41 39 41 40 39 40 39 40 39 39 42 43 44 45 44 45 44 45  
RH 66 74 83 71 48 41 41 53 59 68 71 71 48 39 40 54 59 66 69 71  
WIND DIR W W W W NW NW NW NW NW NW W W W W W W W W W W  
WIND SPD 10 10 10 11 14 17 13 9 6 5 5 5 10 12 11 8 5 5 5 5  
WIND GUST 27 31 27 24  
CLOUDS FW FW CL CL FW FW FW FW CL FW CL CL CL CL CL CL FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
SPRINKLES  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 76 51 77 55 70 50 64 45 63  
TEMP 74 65 56 54 74 67 61 57 69 61 54 52 62 56 49 47 62 55  
DEWPT 48 49 48 47 50 52 53 51 49 47 45 43 42 41 41 40 39 40  
PWIND DIR W W SW SW NW NW N NW NW  
WIND CHAR GN LT LT LT GN LT GN LT GN  
AVG CLOUDS CL CL CL FW FW SC SC SC SC B1 B1 B1 B1 SC SC FW FW SC  
POP 12HR 0 0 10 20 5 10 10 5 5  
RAIN SHWRS S  
 

 
MDZ011-180900-  
BALTIMORE INNER HARBOR-BALTIMORE CITY MD  
39.28N 76.61W ELEV. 20 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 49 65 47 71 54  
TEMP 53 51 50 50 59 63 62 57 52 50 47 47 60 68 69 62 59 56 55 55  
DEWPT 41 41 41 42 44 42 42 41 42 41 41 41 45 46 47 47 47 47 46 48  
RH 64 68 71 74 57 46 48 55 69 71 79 79 58 45 45 58 64 72 72 77  
WIND DIR W W W W NW NW NW NW NW NW W W W W W W W W W W  
WIND SPD 9 10 10 12 13 14 13 6 5 5 5 5 9 11 10 5 5 5 5 5  
WIND GUST 19 26 29 26 23 20  
CLOUDS FW FW CL CL FW FW FW SC CL FW CL CL CL CL FW FW FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 75 53 75 56 69 50 63 46 62  
TEMP 73 65 57 55 74 66 61 57 67 60 54 51 61 55 50 47 60 54  
DEWPT 51 51 50 49 52 54 55 53 52 49 46 44 44 43 42 42 41 42  
PWIND DIR W W S SW NW N N NW NW  
WIND CHAR LT LT LT LT GN LT LT LT LT  
AVG CLOUDS FW CL CL FW FW SC SC SC SC B1 B1 B1 B1 SC SC SC FW SC  
POP 12HR 0 0 10 20 5 10 10 5 5  
RAIN SHWRS S  
 

 
WVZ052-180900-  
MARTINSBURG AIRPORT-BERKELEY WV  
39.41N 77.98W ELEV. 558 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 43 63 42 70 47  
TEMP 47 46 44 46 57 61 60 52 49 45 44 43 59 68 68 58 54 51 50 49  
DEWPT 38 38 39 38 40 37 37 38 37 36 36 37 42 42 43 42 43 42 41 42  
RH 71 73 82 73 53 41 42 59 63 70 73 79 53 39 40 55 66 71 71 77  
WIND DIR W W W W NW NW NW NW NW W W W W W W W W W W W  
WIND SPD 8 6 6 8 13 14 13 5 5 4 4 3 8 10 9 5 4 4 4 3  
WIND GUST 26 27 20  
CLOUDS SC CL FW CL FW FW FW CL CL CL FW CL CL CL CL CL FW FW SC CL  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
SPRINKLES  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 73 46 73 51 64 45 60 40 60  
TEMP 71 60 50 47 71 61 56 52 62 55 49 46 58 51 44 42 57 50  
DEWPT 45 46 44 43 48 52 50 48 46 44 42 41 40 39 38 37 38 38  
PWIND DIR W SW SW W NW NW NW NW NW  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS CL CL CL FW SC B1 SC SC B1 B1 B1 B1 B1 SC SC SC SC SC  
POP 12HR 0 0 30 20 5 10 10 5 5  
RAIN SHWRS C S  
 

 
VAZ506-180900-  
WASHINGTON DULLES AIRPORT-LOUDOUN VA  
38.96N 77.45W ELEV. 321 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 42 65 44 71 49  
TEMP 47 45 43 46 59 63 62 54 50 47 45 45 61 68 69 59 55 53 50 51  
DEWPT 39 39 38 39 41 40 39 39 39 39 37 38 43 43 44 44 43 44 43 44  
RH 74 79 82 76 51 43 43 57 66 74 73 76 51 40 40 57 64 71 77 77  
WIND DIR W W W W NW NW NW NW NW NW W W W W W W W W W W  
WIND SPD 9 5 6 9 13 16 13 6 5 5 4 4 9 10 10 5 5 4 4 4  
WIND GUST 26  
CLOUDS SC CL FW CL CL FW FW FW CL CL CL CL CL CL CL FW FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 75 48 75 53 68 47 63 42 63  
TEMP 73 62 53 50 73 64 59 55 66 58 52 49 61 53 47 44 60 52  
DEWPT 47 48 47 46 50 52 52 51 49 47 45 43 42 41 41 40 40 40  
PWIND DIR W SW SW W NW N NW NW NW  
WIND CHAR LT LT LT LT GN LT LT LT LT  
AVG CLOUDS CL CL CL FW FW SC SC SC SC B1 B1 B1 SC SC SC SC FW FW  
POP 12HR 0 0 20 20 5 10 10 5 5  
RAIN SHWRS S S  
 

 
VAZ037-180900-  
CHARLOTTESVILLE AIRPORT-ALBEMARLE VA  
38.14N 78.45W ELEV. 640 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 44 70 44 74 47  
TEMP 51 48 46 47 61 68 67 57 52 49 46 45 62 71 71 61 55 51 50 48  
DEWPT 38 38 38 37 39 37 37 38 39 39 38 38 42 42 44 44 43 42 41 41  
RH 61 68 73 68 44 32 33 49 61 68 73 76 48 35 38 53 64 71 71 77  
WIND DIR W W W W W NW NW W W W W W SW W SW W W W W W  
WIND SPD 4 4 5 5 9 10 10 5 3 2 2 2 5 5 6 4 2 2 2 2  
CLOUDS CL FW FW CL CL CL FW CL CL FW CL CL CL CL CL FW FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 77 50 78 54 70 50 66 43 65  
TEMP 74 63 55 52 75 67 61 56 68 60 53 50 63 56 49 44 63 55  
DEWPT 45 47 45 44 49 52 53 50 49 49 47 44 43 42 41 39 40 41  
PWIND DIR SW W SW W W N NW NW NW  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS CL CL CL FW FW SC SC SC SC SC B1 B1 SC SC SC SC FW FW  
POP 12HR 0 0 20 10 5 10 10 5 5  
RAIN SHWRS S  
 

 
MDZ003-180900-  
HAGERSTOWN AIRPORT-WASHINGTON MD  
39.71N 77.73W ELEV. 705 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 46 62 44 69 51  
TEMP 50 49 47 48 57 61 60 55 52 48 46 45 58 67 67 61 57 55 53 52  
DEWPT 39 39 40 39 40 39 39 38 39 39 38 38 42 43 43 43 44 44 44 43  
RH 66 68 76 71 53 44 46 53 61 71 73 76 55 42 42 51 62 66 71 71  
WIND DIR W W W W NW NW NW NW NW W W W W W W W W W W W  
WIND SPD 6 6 6 8 16 18 14 6 5 5 5 5 9 12 11 6 5 5 5 5  
WIND GUST 27 31 26 23  
CLOUDS FW FW FW CL FW FW SC FW FW CL CL CL CL CL CL CL FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
SPRINKLES  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 73 51 73 53 64 47 59 43 60  
TEMP 71 64 56 52 70 64 58 54 62 57 51 47 58 54 47 44 57 52  
DEWPT 47 47 46 45 49 52 52 49 47 44 44 41 41 40 40 38 38 39  
PWIND DIR W SW SW SW NW NW NW NW NW  
WIND CHAR GN LT LT LT GN LT LT LT LT  
AVG CLOUDS CL CL CL FW FW B1 B1 SC B1 B1 B1 B1 B1 B1 SC SC SC SC  
POP 12HR 0 0 30 30 5 10 10 5 5  
RAIN SHWRS C C  
 

 
MDZ017-180900-  
PATUXENT RIVER NAS MD  
38.29N 76.41W ELEV. 39 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 47 69 52 73 56  
TEMP 56 53 49 52 64 68 67 60 57 56 54 54 64 70 70 63 61 59 58 59  
DEWPT 42 42 42 43 43 41 42 43 42 43 43 43 44 44 45 47 47 47 48 49  
RH 59 66 77 71 46 37 40 53 57 62 66 66 48 39 41 56 60 64 69 69  
WIND DIR W NW W W NW NW NW NW NW NW NW NW W W W W W W W W  
WIND SPD 12 14 12 13 17 18 17 10 11 11 10 9 10 12 10 8 9 9 9 6  
WIND GUST 27 28  
CLOUDS CL CL CL CL CL FW CL CL CL CL CL CL CL CL CL CL FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 76 57 78 59 72 54 66 50 65  
TEMP 75 65 61 60 76 69 65 62 71 63 59 57 64 58 55 53 63 57  
DEWPT 50 52 51 51 52 55 55 54 52 52 49 48 45 46 44 44 43 44  
PWIND DIR W SW SW SW NW N N N N  
WIND CHAR GN LT GN GN GN GN GN GN GN  
AVG CLOUDS FW CL CL CL FW FW SC SC SC B1 B1 B1 SC SC FW SC FW FW  
POP 12HR 0 0 5 20 5 10 20 5 5  
RAIN SHWRS S S  
 

 
WVZ502-180900-  
PETERSBURG WV  
38.99N 79.15W ELEV. 963 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 44 64 43 69 46  
TEMP 48 46 45 45 54 62 61 52 49 47 44 43 57 68 67 56 51 49 47 47  
DEWPT 38 38 37 37 40 40 41 40 39 37 36 36 43 44 45 45 44 43 42 41  
RH 68 73 73 73 59 44 48 63 68 68 73 76 59 42 45 66 77 80 83 79  
WIND DIR NW W W W NW NW NW W W W W W W W W W W W W W  
WIND SPD 8 6 8 8 10 13 11 5 5 4 4 4 5 9 8 5 4 4 4 3  
WIND GUST 21 26 21  
CLOUDS SC FW FW FW FW CL CL CL FW FW FW FW CL CL CL FW FW SC SC FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
SPRINKLES  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 72 46 74 50 63 44 59 38 61  
TEMP 70 58 50 47 72 61 55 51 61 54 48 44 57 50 42 38 59 50  
DEWPT 47 47 43 42 52 55 52 48 50 48 44 41 44 42 38 35 41 42  
PWIND DIR W SW SW W W NW NW NW NW  
WIND CHAR LT LT LT LT LT LT LT LT LT  
AVG CLOUDS FW CL CL FW SC B1 B1 B2 B2 B1 B1 B2 B1 SC SC SC SC SC  
POP 12HR 0 0 40 30 10 20 10 5 10  
RAIN SHWRS C C S S  
 

 
MDZ014-180900-  
ANNAPOLIS MD  
38.99N 76.49W ELEV. 7 FT  
1041 PM EDT SUN OCT 17 2021  
 
DATE 10/17/21 MON 10/18/21 TUE 10/19/21 WED  
EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08  
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 52 64 50 70 56  
TEMP 56 55 53 53 59 63 63 59 56 53 51 51 60 67 69 63 61 59 58 58  
DEWPT 42 42 42 42 42 41 40 42 42 42 42 42 44 45 46 47 48 47 48 48  
RH 59 61 66 66 53 44 43 53 59 66 71 71 55 45 44 56 62 64 69 69  
WIND DIR W W W W NW NW NW NW NW NW NW W W W W W W W W W  
WIND SPD 11 11 11 13 14 17 14 8 8 6 6 5 10 12 10 5 5 5 5 5  
WIND GUST 28 32 28 18 23 20 16  
CLOUDS CL FW CL CL FW FW FW FW FW CL CL CL CL CL CL CL FW FW FW FW  
POP 12HR 0 0 0 0 0  
QPF 12HR 0 0 0 0 0  
SNOW 12HR 00-00 00-00 00-00  
SPRINKLES  
 
DATE 10/20 THU 10/21/21 FRI 10/22/21 SAT 10/23/21 SUN 10/24/21  
EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MAX/MIN 74 56 74 58 68 53 62 49 61  
TEMP 71 66 60 58 72 67 63 59 67 62 57 54 61 57 53 51 60 56  
DEWPT 50 51 51 50 52 54 55 53 51 50 48 46 44 44 44 43 41 43  
PWIND DIR W SW S SW W NW N N NW  
WIND CHAR GN LT LT LT GN LT GN LT GN  
AVG CLOUDS FW CL CL CL FW SC SC SC SC B1 B1 B1 B1 SC SC FW FW FW  
POP 12HR 0 0 10 20 5 10 20 5 5  
RAIN SHWRS S S  
 

 
 
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