Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
682 FOUS51 KLWX 180838 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 438 AM EDT Sun Aug 18 2024 VAZ054-182000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 87 71 84 65 78 Temp 74 75 82 87 85 77 75 73 72 72 81 84 83 75 71 69 67 65 72 77 77 72 Dewpt 72 72 73 72 72 71 71 70 69 68 67 67 66 64 63 60 58 56 55 53 52 50 RH 93 90 74 61 65 82 87 90 90 87 63 57 57 69 76 73 73 73 55 43 42 46 Wind dir S S S S SW N SW W W NW NW W NW NW NW NW NW NW NW NW N N Wind spd 9 6 8 9 9 5 3 4 5 6 9 10 11 12 12 12 12 12 13 13 12 10 Clouds B1 OV B1 B1 B1 B1 B1 SC SC SC SC B1 B2 B2 B1 B1 SC SC SC SC FW FW PoP 12hr 90 50 70 10 5 QPF 12hr 0.76 0.10 0.06 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C D C L L Tstms S S C L C C C Heat index 87 94 91 83 87 85 Max heat 94 93 87 87 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 59 78 61 82 63 85 67 89 Temp 64 61 75 73 64 63 80 76 66 65 83 79 70 68 86 83 Dewpt 50 50 49 50 52 52 51 53 56 57 56 57 60 60 60 62 PWind dir N N NW NW S S S SW Wind char GN GN LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ013-182000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 85 68 84 63 76 Temp 72 75 81 85 83 75 72 69 69 70 80 84 82 75 69 65 64 64 71 75 76 69 Dewpt 72 73 75 75 74 72 72 69 69 70 70 70 70 67 64 61 58 58 56 55 55 53 RH 100 94 82 72 74 90100100100100 72 63 67 76 84 87 81 81 59 50 48 57 Wind dir S S S S S SW W W W W NW W W NW NW NW NW NW NW NW N N Wind spd 5 4 5 8 6 3 2 2 3 4 5 8 10 9 9 9 10 10 11 11 11 6 Clouds B2 OV B1 B1 B1 B1 B1 SC SC SC FW B1 B1 B2 B2 B1 SC SC SC SC FW SC PoP 12hr 90 50 60 20 10 QPF 12hr 0.95 0.04 0.08 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S C C D C S L L S S Tstms C S C C L C S C C S Heat index 87 94 90 83 88 86 Max heat 94 92 88 88 Coast Flood Y Y Flood A A Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 57 77 59 81 61 84 64 88 Temp 59 59 75 71 61 62 79 74 63 64 82 77 66 66 86 80 Dewpt 51 52 51 53 54 55 53 56 57 59 58 61 60 62 62 64 PWind dir N N NW NE SW S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW SC FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ011-182000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 86 72 85 66 78 Temp 75 71 80 86 84 78 76 74 73 72 82 85 83 76 73 70 68 67 74 77 78 72 Dewpt 72 71 73 72 72 70 70 70 68 68 67 67 66 64 63 60 57 55 54 53 51 50 RH 90100 79 63 67 76 82 87 84 87 61 55 57 66 71 71 68 65 50 43 39 46 Wind dir SE S S S SE SW W W W NW NW W W NW NW NW NW NW NW N N N Wind spd 5 4 5 9 6 2 2 2 3 4 5 8 10 9 10 9 10 10 11 11 11 6 Clouds B2 B2 B2 B1 B1 B2 B1 B1 SC SC SC B1 B1 B2 B2 B1 SC FW SC SC FW FW PoP 12hr 90 50 60 20 10 QPF 12hr 1.01 0.04 0.11 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S C L D C S L L S S Tstms C S C L L C S C C S Heat index 84 92 90 85 88 85 Max heat 92 92 88 88 Coast Flood Y Y Flood A A Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 60 80 63 83 65 86 67 90 Temp 64 61 77 75 66 63 80 77 68 65 83 80 71 68 86 83 Dewpt 50 50 49 50 52 51 50 53 56 56 56 58 60 60 60 62 PWind dir N N NW NE SW S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL CL FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ WVZ052-182000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 84 65 79 59 74 Temp 67 70 80 84 83 78 71 67 66 69 76 79 78 72 65 62 59 60 67 72 74 67 Dewpt 67 69 68 68 67 68 68 66 64 65 65 64 62 59 58 56 54 53 52 50 48 48 RH 100 97 67 59 59 71 90 97 93 87 69 60 58 64 78 81 83 78 59 46 40 50 Wind dir SE S S S W W W W W W NW NW NW NW NW NW NW NW NW N N N Wind spd 2 2 2 5 4 2 1 2 2 4 9 10 12 10 10 9 10 10 11 11 11 5 Clouds B1 B2 SC B1 SC SC SC FW SC SC SC B2 B1 B1 B1 B1 SC FW FW FW FW SC PoP 12hr 80 20 60 10 5 QPF 12hr 0.54 0 0.07 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C D C S S S L L Tstms C L C S S C C Heat index 83 87 86 Max heat 87 87 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 51 75 50 79 53 83 57 86 Temp 53 56 72 68 55 56 76 72 56 59 80 76 59 62 84 78 Dewpt 48 49 47 48 50 51 50 52 53 54 56 57 58 58 58 60 PWind dir NW N NW NE SE SE S W Wind char LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ VAZ506-182000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 87 68 82 62 76 Temp 72 73 81 87 84 78 72 71 69 71 79 82 78 73 69 65 62 63 70 74 76 69 Dewpt 72 73 74 73 73 72 72 70 68 69 70 69 68 66 64 60 58 58 57 55 53 52 RH 100100 79 63 70 82100 97 97 93 74 65 71 79 84 84 87 84 63 51 45 55 Wind dir S S S S SW N SW W NW NW NW NW NW NW NW NW NW NW NW NW N N Wind spd 4 4 4 5 4 3 2 2 3 4 8 9 10 10 11 10 10 10 11 10 9 5 Clouds B2 B2 B1 B1 B1 B1 SC SC SC FW SC B1 B2 B2 B1 B1 SC SC SC SC FW FW PoP 12hr 80 30 70 10 5 QPF 12hr 0.53 0.01 0.10 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C D C L L Tstms S C L C C C Heat index 86 94 90 85 Max heat 94 94 85 84 Flood A A Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 55 77 55 81 58 85 62 89 Temp 58 57 75 71 58 59 79 74 60 61 82 77 64 64 86 81 Dewpt 50 52 51 53 53 53 54 56 56 57 59 61 60 61 62 63 PWind dir N N NW N S S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL FW CL FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ VAZ037-182000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 66 82 60 78 Temp 69 71 82 88 85 78 72 69 67 69 79 81 78 72 67 63 61 61 71 77 77 71 Dewpt 69 70 69 68 68 68 68 68 66 66 66 66 65 62 62 60 57 57 54 52 50 51 RH 100 97 65 52 57 71 87 97 97 90 64 60 64 71 84 90 87 87 55 42 39 49 Wind dir SW S S S SW N N W W W NW NW NW NW NW NW NW NW N N N N Wind spd 2 2 4 6 5 2 2 2 2 2 4 5 6 6 5 5 6 6 8 8 8 5 Clouds B1 B1 SC SC SC SC SC FW FW FW SC B1 B1 B1 SC SC FW FW FW FW FW FW PoP 12hr 50 10 60 5 0 QPF 12hr 0.07 0 0.31 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C L L Tstms C C C L C Heat index 85 92 88 83 Max heat 92 91 84 83 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 54 77 54 81 57 83 60 88 Temp 58 56 75 70 57 57 79 73 60 59 82 74 63 62 86 77 Dewpt 50 50 48 50 51 52 52 54 56 56 57 59 60 59 60 62 PWind dir N N N SE SW S SW S Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW CL FW CL CL FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ003-182000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 83 65 80 59 74 Temp 70 71 78 82 83 77 70 67 65 68 78 80 80 73 67 63 59 60 67 72 74 66 Dewpt 70 71 72 72 71 71 70 67 65 67 68 67 66 62 59 57 55 55 54 53 51 50 RH 100100 82 72 67 82100100100 97 71 65 62 68 75 81 87 84 63 51 44 56 Wind dir S S SW SW SW N SW SW W W NW NW NW NW NW NW NW NW N N N N Wind spd 3 3 3 5 4 3 2 2 2 3 8 10 11 11 10 8 9 10 10 10 10 5 Clouds B2 B2 SC B1 SC B1 SC SC SC SC B1 B2 B1 B2 B1 B1 SC FW SC FW FW SC PoP 12hr 80 20 60 10 5 QPF 12hr 0.21 0.01 0.08 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C D L S S S L L Tstms S C L C S S C C Heat index 87 88 82 82 Max heat 87 88 83 82 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 51 75 53 79 55 83 59 88 Temp 53 55 73 68 55 57 77 72 57 59 80 75 61 62 84 79 Dewpt 49 50 51 52 51 52 54 55 54 56 59 60 58 59 62 63 PWind dir N N N N SE S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW CL FW CL FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ017-182000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 86 71 85 66 78 Temp 74 76 83 86 84 77 73 72 71 74 81 85 82 76 71 68 66 69 73 77 78 72 Dewpt 72 73 75 75 75 73 71 70 70 71 71 70 70 69 66 63 61 61 60 58 57 56 RH 93 90 77 70 74 87 93 93 97 90 72 61 67 79 84 84 84 76 64 52 48 57 Wind dir S S S S SE SW SW W W NW NW W W NW NW NW NW NW NW N N N Wind spd 9 9 9 11 10 6 5 4 4 5 5 6 9 8 11 10 12 11 13 12 11 8 Wind gust 20 Clouds SC SC B1 B2 B1 B2 B2 B1 B1 SC FW SC B1 B2 B1 B1 SC SC SC SC FW FW PoP 12hr 90 70 60 20 5 QPF 12hr 0.63 0.59 0.19 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C D C C L L S S Tstms S S C C C C C C S S Heat index 90 95 92 85 90 86 Max heat 95 94 90 90 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 78 62 81 64 83 67 86 Temp 64 64 76 73 64 66 79 74 66 68 81 76 69 70 84 79 Dewpt 53 54 53 54 55 57 55 56 59 60 59 60 62 63 63 64 PWind dir N N N NE S S S S Wind char GN GN LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ WVZ502-182000- Petersburg WV 38.99N 79.15W Elev. 963 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 85 63 78 55 76 Temp 65 68 80 83 85 76 70 66 64 66 75 77 77 70 64 59 56 57 67 74 76 67 Dewpt 63 64 66 65 64 64 65 64 63 64 65 62 60 59 58 55 54 53 52 49 47 48 RH 93 87 62 55 50 66 84 93 97 93 71 60 56 68 81 87 93 86 59 41 36 50 Wind dir S S W W W W SW SW SW W NW NW NW NW NW NW NW NW NW NW NW NW Wind spd 2 2 3 5 5 3 2 2 2 2 5 8 10 9 6 4 4 5 6 9 9 5 Clouds SC SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 B1 B1 SC SC FW FW FW FW PoP 12hr 60 20 60 10 5 QPF 12hr 0.02 0 0.07 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C L C S L L L L Tstms C C C S S S C C Heat index 82 85 86 Max heat 85 86 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 48 78 49 83 53 88 57 92 Temp 52 51 75 69 52 53 80 73 56 57 85 77 60 59 89 80 Dewpt 48 47 46 47 47 48 49 52 52 53 54 57 55 55 57 60 PWind dir NW N W SE S S SW W Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW CL CL CL CL CL FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ014-182000- Annapolis MD 38.99N 76.49W Elev. 7 ft 438 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 70 82 66 75 Temp 75 72 79 82 81 75 73 70 70 70 78 82 79 75 71 69 67 66 71 74 75 71 Dewpt 73 72 74 75 73 72 73 70 70 70 70 69 68 66 66 63 60 58 57 56 54 54 RH 94100 85 79 77 90100100100100 76 65 69 74 84 81 78 75 61 53 48 55 Wind dir S S S S S SE W W W NW NW W W NW NW NW NW NW NW N N N Wind spd 8 8 9 11 9 5 2 2 3 5 6 9 10 10 10 10 11 11 13 13 12 10 Wind gust 20 Clouds B1 B2 B1 B1 B1 B1 B1 SC SC SC FW SC B1 B2 B1 B1 SC SC FW SC FW SC PoP 12hr 90 60 60 20 10 QPF 12hr 0.94 0.13 0.08 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C C D C S L L S S Tstms S S C C L C S C C S Heat index 89 86 85 Max heat 89 88 85 85 Coast Flood Y Y Flood A A Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 75 63 78 64 81 67 84 Temp 64 61 73 73 65 65 76 74 66 66 79 77 69 69 82 79 Dewpt 53 53 52 54 56 56 54 56 59 59 59 61 62 62 63 64 PWind dir N N N NE S S S S Wind char GN GN LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW CL CL CL FW CL FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$