580  
FOUS51 KLWX 211137  
PFMLWX  
 
POINT FORECAST MATRICES  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
737 AM EDT MON OCT 21 2019  
 
VAZ054-212100-  
REAGAN NATIONAL AIRPORT-ARLINGTON VA  
38.86N 77.03W ELEV. 66 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 68 55 68 48 65  
TEMP 51 61 67 67 60 58 55 55 57 63 68 66 61 60 53 51 48 57 64 64 55  
DEWPT 50 53 54 55 54 54 55 55 56 59 61 61 58 55 51 48 45 45 40 41 41  
RH 96 75 63 65 81 86100100 96 87 78 84 90 84 93 89 89 64 41 43 59  
WIND DIR N N NE SE SE SE SE SE SE SE SE SE N NW NW W W W W W W  
WIND SPD 6 5 3 4 4 5 5 5 6 8 9 6 5 6 4 6 4 10 9 8 3  
CLOUDS OV B2 B1 B1 B1 B2 B2 OV OV OV OV OV OV B1 B1 FW SC FW FW FW FW  
POP 12HR 0 10 90 60 0  
QPF 12HR 0 0 0.40 0.10 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S C L D L S  
OBVIS PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 44 66 50 66 49 58 45 61  
TEMP 47 47 64 58 53 52 65 58 53 50 57 52 48 47 60 55  
DEWPT 40 40 42 46 46 46 51 53 50 47 44 44 43 43 47 49  
PWIND DIR W SW S SW NW N NE E  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 20 30 20 30 40  
RAIN SHWRS S S C S S S C C C C  
 

 
MDZ013-212100-  
BALTIMORE/WASHINGTON AIRPORT-ANNE ARUNDEL MD  
39.19N 76.67W ELEV. 154 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 67 54 67 48 65  
TEMP 49 59 66 66 59 57 54 54 56 62 67 66 62 58 53 50 49 58 64 63 54  
DEWPT 48 50 52 52 52 54 54 54 55 58 61 61 58 54 49 47 44 42 39 38 39  
RH 96 72 61 61 78 90100100 96 87 81 84 87 86 86 89 83 55 40 39 57  
WIND DIR N N E E SE SE SE SE SE SE SE SE SE NW NW W W W W W W  
WIND SPD 6 5 4 4 4 5 4 5 6 9 10 8 5 6 5 8 5 12 11 10 4  
WIND GUST 23 21  
CLOUDS B2 B1 SC SC SC B2 B2 OV B2 OV OV OV OV B1 B1 FW SC FW FW FW FW  
POP 12HR 0 10 90 60 0  
QPF 12HR 0 0 0.38 0.15 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C D L S  
OBVIS PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 43 69 47 67 48 59 44 61  
TEMP 47 47 67 58 52 50 66 58 52 50 58 52 47 46 60 55  
DEWPT 39 38 42 44 45 45 49 50 49 45 43 42 41 42 46 47  
PWIND DIR W SW S SW W N NE E  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 20 30 20 30 40  
RAIN SHWRS S S C S S S C C C C  
 

 
MDZ011-212100-  
BALTIMORE INNER HARBOR-BALTIMORE CITY MD  
39.28N 76.61W ELEV. 20 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 68 54 68 49 65  
TEMP 51 60 68 66 60 58 56 55 55 63 67 67 62 58 54 50 50 57 64 64 57  
DEWPT 49 51 52 53 52 54 55 54 55 58 60 61 58 55 50 47 44 42 39 39 39  
RH 93 72 57 63 75 86 96 96100 84 78 81 87 90 86 89 80 57 40 40 51  
WIND DIR N N E SE SE SE SE SE SE SE SE SE S W NW W W W W W W  
WIND SPD 6 4 3 4 4 5 4 5 5 8 9 8 5 6 5 8 5 11 10 9 4  
WIND GUST 21 21  
CLOUDS B2 B1 SC SC SC B2 B2 OV B2 OV OV OV OV B1 B1 FW SC FW FW FW FW  
POP 12HR 0 10 90 60 0  
QPF 12HR 0 0 0.39 0.16 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C D L S  
OBVIS PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 45 66 50 66 48 59 45 61  
TEMP 48 48 65 58 53 52 65 57 52 50 58 52 48 47 60 56  
DEWPT 39 39 42 44 46 46 49 51 49 45 43 41 41 42 46 48  
PWIND DIR W SW S SW NW N NE E  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 20 30 20 30 40  
RAIN SHWRS S S C S S S C C C C  
 

 
WVZ052-212100-  
MARTINSBURG AIRPORT-BERKELEY WV  
39.41N 77.98W ELEV. 558 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 67 53 64 42 63  
TEMP 45 55 65 66 58 55 54 54 54 62 63 63 57 51 47 44 43 54 62 61 50  
DEWPT 45 49 50 51 51 51 52 53 54 56 58 57 53 48 44 42 39 39 36 36 36  
RH 100 80 58 58 77 86 93 96100 81 84 81 86 89 89 93 86 57 38 39 58  
WIND DIR NW NE SE SE SE SE SE SE SE SE S SW NW W W W W W W W W  
WIND SPD 2 3 3 6 5 5 6 6 8 9 6 5 4 5 4 5 4 12 10 10 3  
WIND GUST 23 20  
CLOUDS B2 B1 SC SC SC B2 B2 OV OV OV OV OV B2 SC B1 SC SC FW FW FW FW  
POP 12HR 0 20 100 30 0  
QPF 12HR 0 0.04 0.55 0.04 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S S C L D D C  
OBVIS PF PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 37 67 43 64 43 57 40 59  
TEMP 41 41 65 55 48 46 63 54 47 45 56 49 44 43 58 52  
DEWPT 35 35 41 42 41 41 47 48 46 41 40 40 38 38 44 45  
PWIND DIR SW S S SW NW N E SE  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 30 30 20 30 40  
RAIN SHWRS S C C S S S C C C C  
 

 
VAZ506-212100-  
WASHINGTON DULLES AIRPORT-LOUDOUN VA  
38.96N 77.45W ELEV. 321 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 68 54 66 44 64  
TEMP 47 58 66 67 57 56 54 54 55 61 66 63 58 53 50 46 45 55 63 63 52  
DEWPT 47 51 52 53 53 53 54 54 55 58 60 59 56 52 48 45 42 41 38 38 39  
RH 100 77 61 61 86 90100100100 90 81 87 93 96 93 96 89 59 39 39 61  
WIND DIR N N E SE SE SE SE SE SE SE SE S NW NW W W W W W W W  
WIND SPD 5 5 3 5 5 6 5 6 8 9 9 5 5 6 4 6 4 11 10 9 4  
CLOUDS B2 B1 B1 SC B1 B2 B2 OV OV OV OV OV B2 B1 B1 FW SC FW FW FW FW  
POP 12HR 0 20 90 50 0  
QPF 12HR 0 0.01 0.49 0.07 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C L D C  
OBVIS PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 39 68 44 66 46 58 42 60  
TEMP 43 43 66 56 49 47 64 56 50 48 57 50 45 45 59 53  
DEWPT 37 37 42 44 44 43 49 51 49 45 43 43 40 40 46 47  
PWIND DIR W SW S SW NW N NE SE  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 20 30 20 30 40  
RAIN SHWRS S S C S S S C C C C  
 

 
VAZ037-212100-  
CHARLOTTESVILLE AIRPORT-ALBEMARLE VA  
38.14N 78.45W ELEV. 640 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 69 54 67 43 66  
TEMP 47 60 68 68 61 57 56 55 55 61 66 66 60 54 49 45 44 57 65 65 52  
DEWPT 46 52 53 53 53 53 54 54 55 58 59 60 54 49 45 42 39 39 35 35 37  
RH 96 75 59 59 75 86 93 96100 90 78 81 81 83 86 89 82 51 33 33 56  
WIND DIR N NE SE SE SE SE SE SE SE SE S SW W W W W W W W W W  
WIND SPD 3 2 3 4 4 3 4 5 5 5 5 4 4 5 4 4 4 8 9 6 3  
CLOUDS B2 B1 SC SC B1 B2 B2 OV OV OV OV OV B1 SC SC FW FW FW FW FW FW  
POP 12HR 0 30 90 20 0  
QPF 12HR 0 0.05 0.49 0.01 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S C C L D L S  
OBVIS PF PF PF PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 39 70 45 69 45 60 43 62  
TEMP 42 43 68 58 50 48 67 57 50 47 59 52 47 46 61 54  
DEWPT 36 35 40 43 42 42 47 50 48 45 45 44 43 41 45 47  
PWIND DIR W SW S SW NW NE NE SE  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC B1 B1 B1  
POP 12HR 0 0 10 20 30 30 30 40  
RAIN SHWRS S S C S C C C C C C  
 

 
MDZ003-212100-  
HAGERSTOWN AIRPORT-WASHINGTON MD  
39.71N 77.73W ELEV. 705 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 66 52 63 42 62  
TEMP 45 55 63 66 57 54 53 53 53 59 63 62 55 52 48 44 43 54 61 60 51  
DEWPT 45 49 50 51 50 51 52 53 53 56 57 57 53 49 45 42 40 40 36 36 36  
RH 100 80 62 58 77 90 96100100 90 81 84 93 89 89 93 89 59 39 41 56  
WIND DIR N NE SE SE SE SE SE SE SE SE S S W W W W W W W W W  
WIND SPD 3 3 4 6 6 8 9 10 9 11 9 5 5 5 4 6 5 12 11 10 4  
WIND GUST 23 21  
CLOUDS B2 B1 SC SC SC B2 B2 OV OV OV OV OV B2 SC B1 SC SC FW FW FW FW  
POP 12HR 0 30 100 40 0  
QPF 12HR 0 0.03 0.60 0.05 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S C C L D D C  
OBVIS PF PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 38 66 43 62 42 56 39 58  
TEMP 41 42 64 55 48 46 61 52 46 44 55 48 43 42 57 51  
DEWPT 35 35 40 41 41 41 46 48 45 41 40 39 38 38 43 44  
PWIND DIR SW S S SW NW N NE SE  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 30 30 20 30 40  
RAIN SHWRS S C C S S S C C C C  
 

 
MDZ017-212100-  
PATUXENT RIVER NAS MD  
38.29N 76.41W ELEV. 39 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 65 56 68 53 65  
TEMP 53 60 64 64 59 58 56 56 58 65 68 67 64 61 57 54 53 59 64 63 55  
DEWPT 52 53 55 54 54 55 56 56 57 60 62 61 60 59 53 50 47 45 42 42 43  
RH 96 78 73 70 83 90100100 96 84 81 81 87 93 86 86 80 60 45 46 64  
WIND DIR N N N NE E E SE SE SE SE SE SE S NW NW NW W NW W W W  
WIND SPD 13 10 6 4 5 8 5 6 8 10 11 12 10 10 11 12 10 12 11 10 5  
CLOUDS B2 B1 B1 B1 B1 B2 B2 B2 B2 OV OV OV OV B2 B1 FW SC FW FW FW FW  
POP 12HR 0 10 60 60 0  
QPF 12HR 0 0 0.19 0.10 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S C L L S  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 49 65 53 67 52 60 49 63  
TEMP 50 51 64 59 56 55 66 60 55 53 59 55 51 51 62 58  
DEWPT 43 44 45 48 49 50 53 54 53 50 48 46 45 46 50 51  
PWIND DIR W SW S SW W N NE E  
WIND CHAR LT LT LT LT LT GN LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 20 30 30 30 30  
RAIN SHWRS S S C S C C C C C C  
 

 
WVZ502-212100-  
PETERSBURG WV  
38.99N 79.15W ELEV. 963 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 70 53 65 40 62  
TEMP 46 56 68 69 60 56 56 55 53 60 64 64 55 48 46 43 40 52 61 61 49  
DEWPT 46 51 52 52 54 53 54 53 53 55 57 52 48 45 42 41 37 35 33 32 35  
RH 100 83 57 55 81 90 93 93100 84 78 65 77 89 86 93 89 52 35 33 58  
WIND DIR S SE SE SE S S S S SE S SW W W W W W SW W W W SW  
WIND SPD 2 2 4 6 5 5 5 4 5 5 4 4 3 6 3 8 4 11 9 9 3  
WIND GUST 24 19 19  
CLOUDS B2 B1 SC SC B1 B2 B2 OV OV OV OV B2 SC SC SC SC FW FW FW FW FW  
POP 12HR 0 20 90 10 0  
QPF 12HR 0 0.06 0.43 0 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S S S C D D C  
OBVIS PF PF PF  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 36 69 42 65 41 58 39 63  
TEMP 38 41 67 56 48 45 63 53 46 43 57 49 43 42 61 53  
DEWPT 35 33 39 42 40 39 46 47 45 41 42 41 40 39 45 45  
PWIND DIR SW S SW SW NW N SE S  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B2 B2 B2 B2 B1 B1 SC B1 B1 B1  
POP 12HR 0 5 10 30 30 20 30 40  
RAIN SHWRS S C C S S S C C C C  
 

 
MDZ014-212100-  
ANNAPOLIS MD  
38.99N 76.49W ELEV. 7 FT  
737 AM EDT MON OCT 21 2019  
 
DATE MON 10/21/19 TUE 10/22/19 WED 10/23/19  
EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20  
UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00  
 
MAX/MIN 66 55 68 50 65  
TEMP 52 59 65 65 59 57 56 56 56 63 68 67 61 59 55 53 50 58 64 64 57  
DEWPT 50 52 53 54 54 55 55 56 56 59 61 61 59 56 51 48 46 44 40 41 41  
RH 93 78 65 68 83 93 96100100 87 78 81 93 90 86 83 86 59 41 43 55  
WIND DIR N N NE E SE SE SE SE SE SE SE SE S W NW W W W W W W  
WIND SPD 9 6 5 3 5 6 5 6 6 9 10 10 6 6 8 9 6 11 11 10 5  
WIND GUST 20 23 23  
CLOUDS B2 B1 B1 SC B1 B2 B2 OV B2 OV OV OV OV B2 B1 FW SC FW FW FW FW  
POP 12HR 0 10 90 60 0  
QPF 12HR 0 0 0.32 0.15 0  
SNOW 12HR 00-00 00-00 00-00  
RAIN SHWRS S C D L S  
 
DATE THU 10/24/19 FRI 10/25/19 SAT 10/26/19 SUN 10/27/19  
EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20  
UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00  
 
MIN/MAX 46 65 50 66 50 59 47 61  
TEMP 49 49 64 58 53 52 65 58 53 51 58 53 50 49 60 56  
DEWPT 41 41 43 46 47 48 51 53 51 47 45 45 43 44 48 49  
PWIND DIR W SW S SW NW N NE E  
WIND CHAR LT LT LT LT LT LT LT LT  
AVG CLOUDS FW FW FW FW FW SC B1 B2 B2 B2 B1 B1 SC SC B1 B1  
POP 12HR 0 0 10 20 30 20 30 40  
RAIN SHWRS S S C S S S C C C C  
 

 
 
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