FOUS51 KLWX 181833 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 233 PM EDT Mon May 18 2026 VAZ054-182000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 233 PM 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 96 74 94 Temp 92 87 79 76 73 74 86 93 94 90 82 78 75 76 87 93 87 79 Dewpt 60 64 65 64 63 63 63 59 57 58 60 60 59 60 61 60 65 68 RH 34 46 62 66 71 69 46 32 29 34 47 54 58 58 42 33 48 69 Wind dir S S S S S SW W SW SW S S SW SW SW W SW W N Wind spd 11 11 10 10 9 9 9 11 16 14 13 13 11 10 9 12 17 13 Clouds FW FW CL FW FW FW FW FW SC SC SC SC SC FW FW B2 B2 B2 PoP 12hr 0 0 10 5 70 QPF 12hr 0 0 0 0 0.11 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L D Tstms S C S Heat index 92 88 87 82 87 93 89 Max heat 94 94 83 92 94 85 93 92 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 65 55 71 60 76 Temp 69 60 65 63 57 57 61 62 57 58 66 68 63 62 73 71 Dewpt 62 52 49 50 52 51 51 52 55 57 61 62 62 62 65 66 PWind dir N NE E E E E E E Wind char GN GN LT GN GN GN GN GN Avg clouds B2 B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 80 60 40 70 80 70 60 60 Rain shwrs D L L C S C L L D D L L L C C L Tstms S S S C S C $$ MDZ013-182000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 233 PM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 94 71 97 73 95 Temp 92 83 77 75 72 75 89 95 95 88 81 78 75 76 90 95 89 78 Dewpt 63 68 66 64 63 64 65 62 62 63 62 61 59 61 63 63 68 70 RH 38 61 69 69 73 69 45 34 34 43 53 56 58 60 41 35 50 76 Wind dir S S S SW SW SW W W SW S SW SW SW SW W W NW N Wind spd 10 8 4 4 4 3 4 8 9 6 6 6 5 4 6 9 9 5 Clouds FW FW FW FW SC FW FW FW SC SC SC B1 SC FW FW OV OV B2 PoP 12hr 0 5 10 5 90 QPF 12hr 0 0 0 0 0.31 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D D Tstms C C S Heat index 93 86 91 96 96 89 82 91 96 93 Max heat 95 95 8296 98 86 96 96 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 70 53 66 52 70 57 76 Temp 68 59 67 65 57 57 63 61 56 57 66 66 61 61 73 71 Dewpt 60 50 49 51 52 50 51 52 54 57 60 62 61 61 64 66 PWind dir N NE E E E E E E Wind char LT LT LT GN LT GN LT LT Avg clouds B2 B1 B2 B1 B1 B2 B2 B2 B2 OV OV B2 B2 OV B2 B2 PoP 12hr 80 60 40 60 80 70 60 60 Rain shwrs D C L C S C L L L D L L L L C L Tstms S S S S S $$ MDZ011-182000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 233 PM 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 97 74 95 Temp 92 84 77 75 72 75 89 95 95 88 81 79 75 77 91 94 89 79 Dewpt 61 66 66 64 63 63 63 59 59 62 62 60 59 60 62 60 65 69 RH 36 55 69 69 73 66 42 30 30 42 53 52 58 56 38 32 45 72 Wind dir S S S S SW SW W SW SW S SW SW SW SW W W NW N Wind spd 10 6 3 3 3 2 3 6 8 5 5 5 4 3 6 9 8 5 Clouds CL FW FW FW FW FW FW FW SC SC SC B1 SC FW FW OV OV B2 PoP 12hr 0 5 5 5 90 QPF 12hr 0 0 0 0 0.42 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D D Tstms C C S Heat index 92 86 90 95 95 88 82 92 94 91 Max heat 94 94 83 95 96 86 94 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 60 70 55 67 55 70 59 75 Temp 68 60 67 66 58 57 64 62 57 58 66 67 62 62 73 72 Dewpt 59 47 45 48 50 47 47 49 53 54 56 60 59 59 61 64 PWind dir N NE E E E E E E Wind char LT LT LT GN LT GN LT LT Avg clouds B2 B1 B2 B2 B1 B2 B2 B2 B2 OV OV B2 OV OV B2 B2 PoP 12hr 80 50 30 60 80 70 60 50 Rain shwrs D C C C S C L L L D L L L L C C Tstms S S S S $$ WVZ052-182000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 233 PM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 94 67 97 70 92 Temp 92 84 77 73 68 73 89 95 95 88 78 74 70 75 88 90 84 75 Dewpt 61 64 62 60 59 61 61 58 56 58 58 57 57 60 62 63 66 64 RH 36 51 60 64 73 66 39 29 27 36 50 55 63 60 42 41 55 69 Wind dir S S SW SW SW NW W SW W SW SW SW W W W NW N Wind spd 9 5 4 4 3 0 6 9 9 5 4 4 5 5 10 11 11 10 Clouds SC B1 SC SC SC SC SC B1 B1 SC FW SC SC FW FW OV OV B1 PoP 12hr 40 30 5 5 90 QPF 12hr 0.03 0 0 0 0.12 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S D D C Tstms S S C C S Heat index 92 85 89 88 91 86 Max heat 93 93 81 94 96 82 92 90 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 54 68 51 65 51 70 56 76 Temp 64 55 65 65 57 54 62 62 56 55 66 67 61 60 73 72 Dewpt 53 45 42 43 47 45 47 49 51 52 57 59 58 57 61 64 PWind dir N NE E E SE SE E SE Wind char GN LT LT GN LT LT LT LT Avg clouds B1 B1 B1 B1 B1 B1 B2 B2 B2 OV B2 B2 B2 B2 B1 B2 PoP 12hr 40 50 40 60 80 80 60 60 Rain shwrs C S C C S C C L D D D D L C C L Tstms S C S C $$ VAZ506-182000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 233 PM 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 98 72 95 Temp 94 88 81 76 71 74 89 96 96 91 84 78 73 75 90 94 87 78 Dewpt 60 63 63 63 61 63 64 61 59 59 59 59 58 60 63 63 68 69 RH 32 43 54 64 71 69 44 32 29 34 43 52 59 60 41 36 53 74 Wind dir S S S S S SW W SW SW SW SW SW SW SW W W NW N Wind spd 10 5 6 8 5 3 4 8 10 10 10 9 5 3 5 8 10 10 Clouds FW FW FW FW SC SC FW FW B1 SC FW SC SC SC FW OV OV B2 PoP 12hr 0 10 10 5 80 QPF 12hr 0 0 0 0 0.20 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D L Tstms C C S Heat index 94 89 82 90 97 96 84 91 95 91 Max heat 93 95 85 97 98 86 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 57 68 53 66 53 71 58 77 Temp 68 58 65 64 58 56 62 62 57 57 67 68 63 61 74 73 Dewpt 61 52 49 51 53 51 53 54 56 57 61 63 62 61 65 67 PWind dir N NE E E E SE E SE Wind char GN LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B1 B1 B2 B2 B2 B2 B2 OV B2 B2 B2 B2 B2 PoP 12hr 70 50 40 70 80 70 60 60 Rain shwrs L C C C S C L L D D L L L C C L Tstms S S S S C S C$$ VAZ037-182000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 233 PM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 94 66 96 68 95 Temp 93 85 77 73 68 71 88 95 95 87 79 75 70 72 90 95 91 81 Dewpt 58 60 60 60 58 61 61 57 55 56 56 57 56 59 60 57 60 65 RH 31 43 56 64 70 71 40 28 26 35 45 54 61 64 37 28 36 58 Wind dir S S S SW S SW SW SW SW SW SW SW SW SW SW SW W NW Wind spd 11 6 6 5 4 4 6 10 12 9 9 8 5 4 6 9 10 6 Wind gust 23 Clouds CL CL FW FW FW SC FW SC SC SC SC SC SC FW FW B2 B2 OV PoP 12hr 0 0 5 0 60 QPF 12hr 0 0 0 0 0.05 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L D Tstms C C C Heat index 85 88 90 91 83 Max heat 93 94 82 94 94 83 94 93 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 58 68 52 64 53 72 58 78 Temp 69 59 65 61 57 55 61 62 59 57 69 70 64 62 76 74 Dewpt 67 58 51 49 52 52 52 53 56 57 61 63 63 62 65 67 PWind dir N NE NE NE NE SE NE SE Wind char LT GN LT LT LT LT LT LT Avg clouds OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 80 70 60 80 80 50 50 60 Rain shwrs D L L C C L D L D C C C C C C L Tstms C S C C C S C $$ MDZ003-182000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 233 PM 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 96 69 90 Temp 92 83 77 72 68 73 87 94 94 88 79 74 69 74 86 88 83 75 Dewpt 60 65 63 62 61 63 64 62 60 60 59 59 58 61 65 66 68 64 RH 34 55 62 71 78 71 46 35 32 39 50 59 68 64 50 48 61 69 Wind dir S S S S S S W W SW SW S SW SW SW W W NW N Wind spd 10 4 4 3 2 2 6 9 9 5 3 3 3 4 10 10 11 9 Clouds SC B1 B1 FW SC SC SC SC B1 SC FW SC SC SC SC OV OV B1 PoP 12hr 40 30 5 5 90 QPF 12hr 0.02 0 0 0 0.08 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S D D C Tstms C C Heat index 92 85 88 95 94 88 88 90 86 Max heat 91 93 82 95 97 84 92 90 Date Thu 05/21/26Fri 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 54 68 51 65 51 68 56 75 Temp 63 55 65 65 56 55 62 61 55 55 64 65 60 60 71 71 Dewpt 53 45 44 45 47 46 49 51 52 53 58 60 59 58 63 64 PWind dir N NE E E E SE E SE Wind char GN LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B1 B1 B2 B2 B2 OV OV B2 B2 B2 B2 B2 PoP 12hr 30 40 30 60 80 80 60 60 Rain shwrs C S C C C C L D D D D L C C L Tstms C S C $$ MDZ017-182000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 233 PM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 91 74 99 75 98 Temp 86 78 77 77 74 78 90 96 95 87 84 81 77 78 91 97 93 82 Dewpt 65 66 65 67 67 67 66 64 63 63 62 64 63 64 64 64 63 65 RH 50 67 67 71 79 69 45 35 35 45 48 56 62 62 41 34 37 56 Wind dir SE S S SW SW SW SW S S S S SW SW SW SW S S N Wind spd 12 11 8 8 8 8 8 9 11 10 10 10 10 9 6 9 9 6 Clouds FW CL CL CL FW CL CL CL CL SC SC FW FW FW CL B1 B1 B2 PoP 12hr 0 0 10 10 50 QPF 12hr 0 0 0 0 0.08 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L Tstms C S Heat index 88 93 98 96 88 85 83 93 99 94 84 Max heat 88 88 98 100 85 82 99 99 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 62 72 56 70 57 75 62 80 Temp 72 64 69 63 60 61 66 64 63 64 73 71 68 68 78 74 Dewpt 67 57 53 53 53 53 53 54 59 61 63 63 65 64 65 65 PWind dir N NE E E E E E E Wind char LT GN LT GN LT GN LT LT Avg clouds B2 B1 B2 B2 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 70 60 50 70 80 70 60 60 Rain shwrs L C L C C C L L L D L L L C C L Tstms S S S S S $$ WVZ502-182000- Petersburg WV 38.99N 79.15W Elev. 963 ft 233 PM 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 67 96 68 91 Temp 93 85 74 71 68 72 87 93 95 90 77 72 69 73 85 89 85 78 Dewpt 58 62 61 59 57 60 59 58 56 59 58 57 56 60 62 63 64 64 RH 31 46 64 66 68 66 39 31 27 35 52 59 63 64 46 42 50 62 Wind dir S S S S S S W W W SW SW SW SW SW W W W NW Wind spd 6 3 4 3 3 2 6 8 9 4 3 3 2 26 8 6 5 Clouds B1 B1 SC SC SC SC SC FW FW SC SC B1 B1 SC SC B2 B2 B2 PoP 12hr 30 30 5 0 80 QPF 12hr 0.01 0 0 0 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S D D L Tstms S S S C C S Heat index 86 86 90 86 Max heat 91 93 81 92 95 82 90 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 54 71 51 68 53 76 59 82 Temp 64 55 67 65 56 54 63 65 59 58 72 73 64 62 78 77 Dewpt 58 51 47 46 47 48 52 53 54 55 62 62 60 59 64 65 PWind dir N NE E SE SE S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 OV B1 B2 B2 B2 PoP 12hr 60 60 50 80 80 80 50 70 Rain shwrs L C L C C C L D D C D D C C L L Tstms S S S S S C S C $$ MDZ014-182000- Annapolis MD 38.99N 76.49W Elev. 7 ft 233 PM EDT Mon May 18 2026 Date Mon 05/18/26 Tue 05/19/26 Wed 05/20/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 70 93 73 92 Temp 86 78 73 74 72 75 88 92 91 83 79 79 75 76 89 92 87 77 Dewpt 64 65 66 66 64 65 65 63 63 63 63 62 61 62 63 62 65 68 RH 48 64 79 76 76 71 47 38 40 51 58 56 62 62 42 37 48 74 Wind dir S S S S SW SW SW S S S S SW SW SW SW S SW N Wind spd 12 11 8 6 6 5 6 10 12 10 9 9 8 5 6 9 8 5 Clouds CL FW CL FW FW CL FW FW SC SC SC SC SC FW FW B2 B2 OV PoP 12hr 0 0 10 5 80 QPF 12hr 0 0 0 0 0.18 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D D Tstms S C S Heat index 87 90 93 92 84 90 93 89 Max heat 90 90 93 95 82 93 92 Date Thu 05/21/26 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 60 68 55 66 55 72 60 77 Temp 69 61 67 64 58 59 65 62 59 60 69 67 64 64 74 71 Dewpt 63 51 49 51 53 51 50 52 55 57 58 61 62 62 61 64 PWind dir N NE E E E E E NE Wind char LT GN LT GN LT GN LT LT Avg clouds OV B2 B2 B1 B1 B2 B2 B2 B2 OV B2 B2 B2 OV B2 B2 PoP 12hr 80 60 40 60 80 70 60 60 Rain shwrs D L L C S C L L L D L L L L C L Tstms S S S S S $$