FOUS51 KLWX 180903 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 503 AM EDT Mon May 18 2026 VAZ054-182000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 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 94 72 95 73 94 Temp 72 86 93 94 87 80 75 72 74 85 92 93 89 82 77 73 75 86 93 87 78 Dewpt 64 64 62 60 64 64 64 63 63 63 60 59 60 60 60 59 60 62 61 66 69 RH 76 48 36 32 46 58 69 73 69 48 34 32 38 47 56 62 60 45 35 50 74 Wind dir S S S S S S S S SW SW SW SW S S SW SW SW W W W NW Wind spd 2 5 9 11 11 9 9 9 9 9 11 13 14 13 13 12 10 9 12 14 12 Clouds FW FW CL FW FW FW FW FW FW SC SC SC SC FW FW FW FW FW B2 B2 B2 PoP 12hr 5 5 0 5 80 QPF 12hr 0 0 0 0 0.14 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D L Tstms S C Heat index 87 94 94 88 82 86 92 89 82 86 93 89 Max heat 94 94 84 92 93 84 93 93 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 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 69 55 64 57 74 62 77 Temp 69 61 65 62 58 56 60 61 59 60 70 71 65 64 74 73 Dewpt 61 51 48 51 51 52 54 55 56 59 63 65 64 64 66 67 PWind dir N NE E E E SE SE SW Wind char GN GN LT GN GN GN GN GN Avg clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 70 70 40 60 70 60 60 60 Rain shwrs L C L L C C C L L C C L L C C L Tstms S S S $$ MDZ013-182000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 94 70 96 72 95 Temp 72 86 94 93 83 76 74 72 74 87 94 93 85 80 76 73 76 90 94 88 78 Dewpt 64 65 62 63 66 66 64 63 64 64 62 61 63 62 61 59 61 63 63 68 70 RH 76 50 35 37 57 71 71 73 71 46 35 35 48 54 60 62 60 41 36 52 76 Wind dir N SW S S S S S SW SW SW SW SW S S SW SW SW W W W NW Wind spd 0 4 6 10 9 5 4 5 5 5 8 10 8 8 6 5 4 6 9 8 5 Clouds FW FW FW FW SC FW FW FW FW SC SC SC SC SC FW FW FW FW OV OV B2 PoP 12hr 5 10 5 5 90 QPF 12hr 0 0 0 0 0.16 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D L Tstms S C Heat index 88 95 94 85 88 95 93 86 81 91 95 92 Max heat 95 95 83 95 95 84 95 95 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 70 53 66 55 74 59 78 Temp 68 59 67 62 57 56 62 60 58 59 71 70 64 63 75 72 Dewpt 59 50 48 50 51 50 51 53 56 58 62 65 62 63 65 67 PWind dir N NE E E E E E N Wind char LT LT LT GN LT LT LT LT Avg clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 OV B2 B2 B2 OV B2 B2 PoP 12hr 60 50 30 60 70 50 70 50 Rain shwrs L C C C C C C L L L C C L C C C Tstms S S S $$ MDZ011-182000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 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 93 71 96 74 95 Temp 72 86 93 93 84 77 75 72 74 88 94 94 87 81 78 74 77 90 94 88 79 Dewpt 64 64 62 61 65 66 64 63 63 63 60 60 62 61 60 59 60 61 60 66 69 RH 76 48 36 35 53 69 69 73 69 43 32 32 43 51 54 59 56 38 32 48 72 Wind dir N S S S S S S SW SW SW SW S S S SW SW SW W W W NW Wind spd 0 3 6 10 8 4 4 3 4 5 8 9 6 5 5 4 3 6 9 8 4 Clouds FW CL FW CL SC FW FW FW FW SC SC SC SC SC SC FW FW FW OV OV B2 PoP 12hr 5 10 5 5 90 QPF 12hr 0 0 0 0 0.16 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D L Tstms S C Heat index 87 94 93 86 89 94 94 87 82 90 94 90 Max heat 94 94 83 94 96 84 94 94 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 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 70 56 67 57 73 61 77 Temp 68 60 67 64 58 57 63 61 59 59 71 70 64 64 75 73 Dewpt 57 46 44 48 49 49 49 52 54 56 58 63 61 62 62 65 PWind dir N NE E E E E E N Wind char LT LT LT GN LT LT LT LT Avg clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 OV OV B2 B2 OV B2 B2 PoP 12hr 60 50 30 60 70 60 70 50 Rain shwrs L S C C S C L L L L L C L C C C Tstms S S S $$ WVZ052-182000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 94 67 95 69 92 Temp 69 86 93 92 85 76 72 68 72 87 93 95 89 78 73 69 75 87 90 85 77 Dewpt 61 62 60 61 63 62 60 59 61 62 59 59 59 58 58 57 60 61 62 64 62 RH 76 45 33 36 48 62 66 73 68 43 32 30 37 50 59 66 60 42 39 50 60 Wind dir N SW S S W S SW SW SW W SW SW SW SW SW W SW W W NW NW Wind spd 0 2 5 9 8 5 5 4 2 6 9 10 4 4 4 5 5 10 11 11 10 Clouds FW CL FW SC B1 SC FW FW SC FW SC B1 SC SC FW SC FW FW B2 B2 B1 PoP 12hr 40 20 5 5 80 QPF 12hr 0.03 0.01 0 0 0.05 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S D D C Tstms C S S S Heat index 86 93 92 86 87 95 87 90 86 Max heat 93 93 82 92 95 82 92 90 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 55 68 51 66 53 73 58 78 Temp 64 56 65 63 56 55 61 62 58 57 70 70 64 62 75 73 Dewpt 52 45 42 42 46 45 48 50 52 53 59 61 60 59 63 64 PWind dir N NE E SE SE SE E N Wind char GN LT LT GN LT LT LT LT Avg clouds B1 B2 B2 B2 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 40 50 30 70 70 70 60 60 Rain shwrs C C C C S C L L L L L L L C C L Tstms S C S C $$ VAZ506-182000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 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 95 70 96 72 95 Temp 71 87 93 94 88 81 76 72 73 88 94 95 89 84 77 72 75 89 94 87 78 Dewpt 64 64 61 60 63 63 63 62 63 64 61 60 59 59 60 59 61 63 64 68 69 RH 79 46 35 32 43 54 64 71 71 45 34 31 37 43 56 64 62 42 37 53 74 Wind dir S SW SW S S S S S SW SW SW SW S SW SW SW SW W W W NW Wind spd 1 3 5 10 9 8 8 6 5 5 9 11 10 10 9 5 3 5 9 10 9 Clouds FW FW FW FW SC FW FW FW SC SC SC SC SC FW FW FW FW FW OV OV B2 PoP 12hr 5 10 0 5 80 QPF 12hr 0 0 0 0 0.19 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D L Tstms S C Heat index 88 93 94 89 82 89 94 95 84 90 96 91 Max heat 93 95 86 94 96 85 96 95 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 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 58 68 53 65 55 74 60 78 Temp 68 59 65 62 57 55 61 61 59 58 71 71 65 63 75 74 Dewpt 60 51 49 50 51 51 54 55 56 58 63 65 64 63 67 68 PWind dir N NE E E E SE SE W Wind char GN LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B2 B2 B2 OV B2 B2 B2 OV B2 B2 B2 B2 B2 PoP 12hr 60 60 40 70 70 50 60 60 Rain shwrs L C L C C C L L L C C C L C S L Tstms S C S C $$ VAZ037-182000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 94 67 95 68 95 Temp 72 88 93 94 85 77 73 68 72 88 94 94 86 79 73 69 72 89 94 89 80 Dewpt 62 63 60 58 62 61 61 59 61 62 58 56 57 56 57 56 60 60 59 62 66 RH 71 43 33 30 46 58 66 73 68 42 30 28 37 45 57 63 66 38 31 41 62 Wind dir S SW S S S SW SW SW SW SW SW SW SW SW SW SW SW SW SW W NW Wind spd 1 4 6 11 8 6 5 5 4 6 10 11 9 9 8 5 4 6 10 10 4 Wind gust 19 Clouds FW CL FW CL FW FW FW FW FW FW FW FW SC FW FW FW FW FW B2 B2 B2 PoP 12hr 5 5 0 0 70 QPF 12hr 0 0 0 0 0.04 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L D Tstms C C S Heat index 89 93 86 88 89 89 82 Max heat 93 94 82 93 94 82 93 94 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 68 52 63 55 75 60 80 Temp 69 59 66 62 58 54 60 63 60 58 72 72 66 63 78 75 Dewpt 66 57 51 50 50 51 55 55 56 57 62 64 65 63 66 67 PWind dir N NE NE NE NE S S S Wind char LT GN LT LT LT LT LT LT Avg clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 80 70 60 70 60 60 60 60 Rain shwrs D L L L L L L L L S S L L C C L Tstms S S C S C $$ MDZ003-182000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 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 93 68 95 69 90 Temp 71 84 91 92 85 78 73 68 72 86 92 93 87 78 73 69 74 86 88 83 76 Dewpt 62 63 61 60 63 63 62 61 62 64 62 62 61 60 59 59 61 64 66 67 62 RH 73 49 37 34 48 60 68 78 71 48 37 36 42 54 62 70 64 48 48 59 62 Wind dir S SW SW S SW S S S SW SW SW SW SW SW SW SW SW W W NW NW Wind spd 1 4 6 10 8 6 4 4 4 8 10 10 4 3 3 3 5 10 10 11 9 Clouds FW CL FW SC B1 SC FW SC SC SC SC SC SC SC FW FW SC SC OV OV B1 PoP 12hr 30 30 5 5 80 QPF 12hr 0.02 0.03 0 0 0.04 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S D D C Tstms C S S S Heat index 85 91 92 86 87 93 94 87 87 90 86 Max heat 91 93 82 93 95 82 91 90 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 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 68 52 66 53 72 58 76 Temp 63 56 65 65 55 54 62 63 58 57 68 69 63 62 73 72 Dewpt 52 45 43 45 47 46 50 52 54 54 60 62 61 60 64 64 PWind dir N NE E SE SE SE SE NW Wind char GN LT LT LT LT LT LT LT Avg clouds B1 B2 B2 B2 B1 B2 B2 B2 B2 OV B2 B2 B2 B2 B2 B2 PoP 12hr 30 30 30 70 80 70 70 60 Rain shwrs C C C C S C L L D L L L L C C L Tstms C S S $$ MDZ017-182000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 91 72 96 74 99 Temp 74 84 86 85 77 76 76 72 76 86 91 90 83 81 78 74 78 90 97 93 81 Dewpt 65 64 65 65 66 65 66 64 65 65 64 63 64 62 64 63 64 64 63 62 66 RH 74 51 50 51 69 69 71 76 69 50 41 41 53 53 62 69 62 42 33 36 60 Wind dir SW SW SE SE S S S S SW SW S S S S SW SW SW SW S S NW Wind spd 4 4 10 12 11 9 9 9 9 8 9 11 10 10 10 10 9 6 8 9 5 Clouds CL CL FW FW FW CL CL FW FW FW FW SC FW FW CL FW CL FW B1 B1 B2 PoP 12hr 5 5 0 0 50 QPF 12hr 0 0 0 0 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C D Tstms S S Heat index 85 88 87 88 93 91 84 82 91 99 94 83 Max heat 88 88 93 94 82 99 98 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 62 73 56 66 59 79 64 81 Temp 73 64 69 63 61 60 65 63 64 66 77 73 69 69 79 75 Dewpt 66 57 52 52 53 52 54 56 60 62 64 65 66 66 67 66 PWind dir N NE NE E E SE S W Wind char LT GN LT GN LT GN LT LT Avg clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 80 70 60 70 50 70 70 70 Rain shwrs D C L L C L L L C C C L L C C L Tstms S S S S $$ WVZ502-182000- Petersburg WV 38.99N 79.15W Elev. 963 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 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 95 66 95 68 90 Temp 71 86 92 92 85 75 71 67 71 86 93 95 89 76 71 68 73 84 88 85 78 Dewpt 59 61 59 58 62 61 58 56 60 60 58 57 59 59 57 56 59 61 63 64 63 RH 66 43 33 32 46 62 63 68 68 42 31 28 37 56 61 65 62 46 43 50 60 Wind dir N SW S S S SW SW SW SW W W W SW SW SW SW W W W W NW Wind spd 0 2 4 6 4 4 4 3 2 6 8 9 4 3 3 3 2 6 8 6 4 Clouds CL CL SC B1 SC SC FW SC SC SC SC SC SC SC SC SC SC SC B2 B2 B1 PoP 12hr 30 10 5 5 70 QPF 12hr 0.01 0 0 0 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S L L C Tstms C S S S Heat index 86 86 86 84 89 86 Max heat 91 91 81 92 94 82 89 89 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 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 71 51 68 55 79 60 83 Temp 64 56 67 63 57 53 62 63 60 59 74 75 65 64 78 77 Dewpt 57 50 47 45 47 47 53 53 54 56 63 62 61 61 66 65 PWind dir N NE E SE S S SW W Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B2 B1 B2 B2 B2 B2 B2 B2 OV B2 B2 B2 B2 PoP 12hr 70 60 40 70 60 80 60 70 Rain shwrs C L L L C C L L L C L D L C C L Tstms S S S C S C $$ MDZ014-182000- Annapolis MD 38.99N 76.49W Elev. 7 ft 503 AM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 70 91 72 91 Temp 71 84 88 86 78 74 74 73 75 88 90 90 82 79 77 73 76 89 91 86 77 Dewpt 64 66 65 64 66 66 65 64 65 65 63 63 63 63 62 61 62 63 62 65 68 RH 79 55 47 48 67 76 74 73 71 47 41 41 53 58 60 66 62 42 38 50 74 Wind dir S S S S S S S S SW SW S S S S SW SW SW SW SW SW NW Wind spd 1 4 9 12 12 9 6 6 6 6 10 12 10 9 9 8 5 6 9 8 5 Clouds CL CL CL CL FW FW FW FW FW FW FW SC B1 FW FW FW FW FW B2 B2 B2 PoP 12hr 5 10 5 5 80 QPF 12hr 0 0 0 0 0.27 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D L Tstms C Heat index 86 90 87 90 91 91 83 90 92 88 Max heat 90 90 92 93 92 91 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 60 68 55 66 57 75 62 78 Temp 69 61 66 62 59 57 62 60 61 62 73 70 66 66 76 72 Dewpt 61 51 48 49 52 50 50 52 57 59 60 63 63 63 63 65 PWind dir N NE E E E E E NE Wind char LT GN LT GN LT LT LT LT Avg clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 70 60 40 60 70 60 70 60 Rain shwrs L C L C C C L L L L L L L C C L Tstms S S S $$