FOUS51 KLWX 182105 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 505 PM EDT Mon May 18 2026 VAZ054-190800- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 72 95 74 94 60 Temp 87 79 76 73 74 86 93 94 90 82 78 75 76 87 93 87 79 73 69 63 60 Dewpt 64 65 64 63 63 63 59 57 58 60 60 59 60 61 60 65 68 68 62 56 52 RH 46 62 66 71 69 46 32 29 34 47 54 58 58 42 33 48 69 84 78 78 75 Wind dir S S S S SW W SW SW S S SW SW SW W SW W N N N N N Wind spd 9 9 9 8 8 9 11 16 11 11 10 9 9 9 12 17 13 11 11 13 13 Clouds FW CL FW FW FW FW FW SC SC SC SC SC FW FW B2 B2 B2 B2 B2 B2 B2 PoP 12hr 0 10 5 70 80 QPF 12hr 0 0 0 0.11 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L D D L L L Tstms C C S S Heat index 88 87 82 87 93 89 Max heat 92 84 92 94 85 93 92 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 68 55 65 55 71 60 76 62 77 Temp 65 63 57 57 61 62 57 58 66 68 63 62 73 71 64 64 74 73 Dewpt 49 50 52 51 51 52 55 57 61 62 62 62 65 66 64 63 64 65 PWind dir NE E E E E E E E E Wind char GN LT GN GN GN GN GN GN GN Avg clouds B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2 B2 B2 PoP 12hr 60 40 70 80 70 60 60 40 40 Rain shwrs L C S C L L D D L L L C C L C C C C $$ MDZ013-190800- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 71 96 73 95 58 Temp 84 77 75 72 75 89 95 95 88 81 78 75 76 90 95 89 78 72 68 62 59 Dewpt 68 66 64 63 64 65 62 62 63 62 61 59 61 63 63 68 70 67 60 53 50 RH 59 69 69 73 69 45 34 34 43 53 56 58 60 41 35 50 76 84 76 72 72 Wind dir S S SW SW SW W W SW S SW SW SW SW W W NW N N N N N Wind spd 9 5 4 4 4 6 8 9 6 6 6 6 5 6 9 9 5 4 6 9 9 Clouds FW FW FW SC FW FW FW SC SC SC B1 SC FW FW OV OV B2 B2 B2 B1 B2 PoP 12hr 5 10 5 90 80 QPF 12hr 0 0 0 0.31 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D D D C C L Tstms C C S S Heat index 87 91 96 96 89 82 91 96 93 Max heat 9583 96 97 86 96 96 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 70 53 66 52 70 57 76 59 77 Temp 67 65 57 57 63 61 56 57 66 66 61 61 73 71 64 63 75 72 Dewpt 49 51 52 50 51 52 54 57 60 62 61 61 64 66 62 62 63 65 PWind dir NE E E E E E E E E Wind char LT LT GN LT GN LT LT LT LT Avg clouds B2 B1 B1 B2 B2 B2 B2 OV OV B2 B2 OV B2 B2 B2 B2 B2 B2 PoP 12hr 60 40 60 80 70 60 60 40 40 Rain shwrs L C S C L L L D L L L L C L C C C C $$ MDZ011-190800- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 71 96 74 95 60 Temp 85 77 75 72 75 89 95 95 88 81 79 75 77 91 94 89 79 72 68 62 60 Dewpt 66 66 64 63 63 63 60 59 62 62 60 59 60 62 60 65 69 66 59 52 47 RH 53 69 69 73 66 42 31 30 42 53 52 58 56 38 32 45 72 81 73 70 62 Wind dir S S S SW SW W SW SW S S SW SW W W W NW N N N N N Wind spd 8 4 3 3 4 5 6 8 5 5 5 4 5 6 9 8 5 4 5 8 8 Clouds FW FW FW FW FW FW FW SC SC SC B1 SC FW FW OV OV B2 B2 B1 B1 B2 PoP 12hr 5 5 5 90 80 QPF 12hr 0 0 0 0.42 0.06 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D D D C C C Tstms C C S S Heat index 87 90 95 95 88 82 92 94 91 Max heat 94 85 95 95 86 94 93 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 70 55 67 55 70 59 75 61 77 Temp 67 66 58 57 64 62 57 58 66 67 62 62 73 72 64 63 75 73 Dewpt 45 48 50 47 47 49 53 54 56 60 59 59 61 64 61 60 60 63 PWind dir NE E E E E E E E E Wind char LT LT GN LT GN LT LT LT LT Avg clouds B2 B2 B1 B2 B2 B2 B2 OV OV B2 OV OV B2 B2 B2 B2 B2 B2 PoP 12hr 50 30 60 80 70 60 50 40 40 Rain shwrs C C S C L L L D L L L L C C C C C C $$ WVZ052-190800- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 67 96 70 92 54 Temp 85 77 73 68 73 89 95 95 88 78 74 70 75 88 90 84 75 68 64 58 55 Dewpt 64 62 60 59 61 61 58 56 58 58 57 57 60 62 63 66 64 59 53 48 45 RH 50 60 64 73 66 39 29 27 36 50 55 63 60 42 41 55 69 73 67 69 69 Wind dir S SW SW SW S W W SW SW SW SW SW SW W W NW N NW N N N Wind spd 5 4 4 3 2 8 9 9 5 5 4 5 5 10 11 11 10 10 10 11 11 Clouds SC SC SC SC SC SC B1 B1 SC FW SC SC FW FW OV OV B1 B1 B1 B2 B1 PoP 12hr 10 5 5 90 40 QPF 12hr 0 0 0 0.12 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D C C S S C Tstms C C S S Heat index 86 89 88 91 86 Max heat 92 82 94 95 82 92 90 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 68 51 65 51 70 56 76 59 78 Temp 65 65 57 54 62 62 56 55 66 67 61 60 73 72 64 62 75 74 Dewpt 42 43 47 45 47 49 51 52 57 59 58 57 61 64 62 59 61 63 PWind dir NE E E SE SE E SE E SE Wind char LT LT GN LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B2 B2 B2 OV B2 B2 B2 B2 B1 B2 B1 B2 B2 B2 PoP 12hr 50 40 60 80 80 60 60 40 50 Rain shwrs C C S C C L D D D D L C C L C C C C $$ VAZ506-190800- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 70 97 72 95 57 Temp 89 81 76 72 74 89 96 96 91 84 78 73 75 90 94 87 78 72 68 62 58 Dewpt 63 63 63 61 63 64 61 59 59 59 59 58 60 63 63 68 69 66 61 55 52 RH 42 54 64 68 69 44 32 29 34 43 52 59 60 41 36 53 74 81 78 78 80 Wind dir S S S S SW W SW SW SW SW SW SW SW W W NW N N N N N Wind spd 6 6 6 5 4 5 8 10 8 9 8 5 4 5 8 10 10 6 8 10 10 Wind gust 18 Clouds FW FW FW SC SC FW FW B1 SC FW SC SC SC FW OV OV B2 B2 B1 B1 B2 PoP 12hr 5 10 5 80 70 QPF 12hr 0 0 0 0.20 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D L L C C C Tstms C C S S Heat index 90 82 90 97 96 84 91 95 91 Max heat 96 86 97 97 86 95 95 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 68 53 66 53 71 58 77 60 78 Temp 65 64 58 56 62 62 57 57 67 68 63 61 74 73 65 63 76 74 Dewpt 49 51 53 51 53 54 56 57 61 63 62 61 65 67 64 63 65 66 PWind dir NE E E E SE E SE E E Wind char LT LT LT LT LT LT LT LT LT Avg clouds B2 B1 B1 B2 B2 B2 B2 B2 OV B2B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 50 40 70 80 70 60 60 40 50 Rain shwrs C C S C L L D D L L L C C L C C C C $$ VAZ037-190800- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 66 95 68 95 58 Temp 86 77 73 68 71 88 95 95 87 79 75 70 72 90 95 91 81 73 69 64 59 Dewpt 60 60 60 58 61 61 57 55 56 56 57 56 59 60 57 60 65 68 67 61 58 RH 42 56 64 70 71 40 28 26 35 45 54 61 64 37 28 36 58 84 93 90 96 Wind dir S SW SW SW SW SW SW SW SW SW SW SW SW SW SW W NW N NE NE NE Wind spd 6 6 5 4 5 6 10 12 8 8 6 5 4 6 9 10 6 5 5 8 10 Wind gust 23 18 Clouds CL FW FW FW SC FW SC SC SC SC SC SC FW FW B2 B2 OV OV B2 B2 B2 PoP 12hr 0 5 0 60 80 QPF 12hr 0 0 0 0.05 0.13 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L D D L L L Tstms C C C C Heat index 86 88 90 91 83 Max heat 93 82 94 93 83 94 93 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 68 52 64 53 72 58 78 61 79 Temp 65 61 57 55 61 62 59 57 69 70 64 62 76 74 67 64 77 75 Dewpt 51 49 52 52 52 53 56 57 61 63 63 62 65 67 66 64 65 66 PWind dir NE NE NE NE SE NE SE NE SE Wind char GN LT LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2 B2 B2 PoP 12hr 70 60 80 80 50 50 60 50 60 Rain shwrs L C C L D L D C C C C C C L C S C L Tstms S $$ MDZ003-190800- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 68 96 69 90 54 Temp 84 77 72 68 73 87 94 94 88 79 74 69 74 86 88 83 75 68 63 57 55 Dewpt 65 63 62 61 63 64 62 61 60 59 59 58 61 65 66 68 64 59 53 48 45 RH 53 62 71 78 71 46 35 34 39 50 59 68 64 50 48 61 69 73 70 72 69 Wind dir S S S S SW W W SW SW S SW SW SW W W NW N N N N N Wind spd 5 5 4 3 3 8 9 9 5 4 3 4 5 10 10 11 9 9 10 11 11 Wind gust 21 21 Clouds SC B1 SC SC SC SC SC B1 SC FW SC SC SC SC OV OV B1 B1 B1 B1 B1 PoP 12hr 10 5 5 90 30 QPF 12hr 0 0 0 0.08 0.01 Snow 12hr 00-00 00-00 00-00Rain shwrs S S D D C C S S C Tstms C C Heat index 86 88 95 94 88 88 90 86 Max heat 93 83 95 97 84 92 90 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 68 51 65 51 68 56 75 59 77 Temp 65 65 56 55 62 61 55 55 64 65 60 60 71 71 64 62 74 73 Dewpt 44 45 47 46 49 51 52 53 58 60 59 58 63 64 62 59 63 64 PWind dir NE E E E SE E SE E SE Wind char LT LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B2 B2 B2 OV OV B2 B2 B2 B2 B2 B1 B2 B2 B2 PoP 12hr 40 30 60 80 80 60 60 40 50 Rain shwrs C C C C L D D D D L C C L C C C C $$ MDZ017-190800- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 74 90 75 92 62 Temp 82 80 79 75 78 90 90 90 87 84 81 77 78 91 92 92 82 75 72 67 64 Dewpt 66 65 67 67 67 66 64 63 63 62 64 63 64 64 64 63 65 66 67 62 57 RH 58 60 67 76 69 45 42 41 45 48 56 62 62 41 40 38 56 74 84 84 78 Wind dir S S SW SW SW SW S S S S SW SW SW SW S S N N N N N Wind spd 12 10 9 9 9 9 9 11 9 11 11 10 10 6 9 9 6 4 5 11 13 Clouds CL CL CL FW CL CL FW FW SC SC FW FW FW CL B1 B1 B2 B2 B1 B1 B2 PoP 12hr 0 10 10 50 70 QPF 12hr 0 0 0 0.08 0.06 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L L C C L Tstms S S C C Heat index 84 82 93 91 91 88 85 83 93 94 93 84 Max heat 90 82 93 91 85 82 94 94 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 72 56 70 57 75 62 80 63 80 Temp 69 63 60 61 66 64 63 64 73 71 68 68 78 74 69 68 78 73 Dewpt 53 53 53 53 53 54 59 61 63 63 65 64 65 65 65 64 65 63 PWind dir NE E E E E E E E E Wind char GN LT GN LT GN LT LT LT LT Avg clouds B2 B2 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 60 50 70 80 70 60 60 50 50 Rain shwrs L C C C L L L D L L L C C L C C C C $$ WVZ502-190800- Petersburg WV 38.99N 79.15W Elev. 963 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu 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 67 95 6891 54 Temp 86 75 72 68 72 87 93 95 90 77 72 69 73 85 89 85 78 69 64 59 55 Dewpt 62 61 59 57 60 59 58 56 59 58 57 56 60 62 63 64 64 62 58 54 51 RH 45 62 64 68 66 39 31 27 35 52 59 63 64 46 42 50 62 78 81 83 86 Wind dir S S S S SW W W W SW SW SW SW SW W W W NW N N N NE Wind spd 3 4 4 3 3 8 8 9 5 4 3 3 3 6 8 6 5 4 3 3 4 Clouds SC SC SC SC SC SC FW FW SC SC B1 B1 SC SC B2 B2 B2 B2 B2 B2 B2 PoP 12hr 10 5 0 80 60 QPF 12hr 0 0 0 0.07 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S D D L L C C L Tstms S S C C S S Heat index 86 86 90 86 Max heat 93 82 92 94 82 90 90 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 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 71 51 68 53 76 59 82 61 82 Temp 67 65 56 54 63 65 59 58 72 73 64 62 78 77 67 64 79 78 Dewpt 47 46 47 48 52 53 54 55 62 62 60 59 64 65 62 61 65 64 PWind dir NE E SE SE S S SW S SW Wind char LT LT LT LT LT LT LT LT LT Avg clouds B2 B1 B1 B2 B2 B2 B2 B2 B2 OV B1 B2 B2 B2 B1 B2 B2 B2 PoP 12hr 60 50 80 80 80 50 70 40 70 Rain shwrs L C C C L D D C D D C C L L C C L L $$ MDZ014-190800- Annapolis MD 38.99N 76.49W Elev. 7 ft 505 PM EDT Mon May 18 2026 Date 05/18/26 Tue 05/19/26 Wed 05/20/26 Thu EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 70 91 73 92 60 Temp 79 74 75 72 75 88 91 91 83 79 79 75 76 89 92 87 77 72 69 64 61 Dewpt 65 66 66 64 65 65 63 63 63 63 62 61 62 63 62 65 68 68 63 56 51 RH 62 76 74 76 71 47 40 40 51 58 56 62 62 42 37 48 74 87 81 75 70 Wind dir S S S S SW SW S S S S SW SW SW SW S SW N N N N N Wind spd 12 8 6 6 6 6 10 12 10 9 9 8 6 6 9 8 5 4 6 10 11 Clouds FW CL FW FW CL FW FW SC SC SC SC SC FW FW B2 B2 OV OV B2 B2 B2 PoP 12hr 0 10 5 80 80 QPF 12hr 0 0 0 0.18 0.10 Snow 12hr 00-00 00-00 00-00 Rain shwrs D D D D L L L Tstms C C S S Heat index 90 92 92 84 90 93 89 Max heat 89 93 93 82 93 92 Date 05/21 Fri 05/22/26 Sat 05/23/26 Sun 05/24/26 Mon 05/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 68 55 66 55 72 60 77 62 78 Temp 67 64 58 59 65 62 59 60 69 67 64 64 74 71 66 65 75 72 Dewpt 49 51 53 51 50 52 55 57 58 61 62 62 61 64 63 62 61 63 PWind dir NE E E E E E NE EE Wind char GN LT GN LT GN LT LT LT LT Avg clouds B2 B1 B1 B2 B2 B2 B2 OV B2 B2 B2 OV B2 B2 B2 B2 B2 B2 PoP 12hr 60 40 60 80 70 60 60 50 40 Rain shwrs L C S C L L L D L L L L C L C C C C $$