Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
346 FOUS51 KLWX 190900 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 500 AM EDT Wed Aug 19 2026 VAZ054-192000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 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 90 73 87 68 84 Temp 71 72 82 87 89 84 79 76 74 75 82 84 84 77 74 72 70 70 77 80 83 78 Dewpt 64 65 64 63 64 66 67 67 68 69 72 71 71 70 69 67 67 66 67 68 68 68 RH 79 79 55 45 44 55 67 74 82 82 72 65 65 79 84 84 90 87 71 67 61 71 Wind dir N NW W W W SW S W N NE E SW SW N N N N NE NE E E SE Wind spd 5 5 5 6 6 5 4 4 4 5 6 8 9 8 6 6 9 9 9 8 9 8 Clouds CL CL CL CL FW FW SC SC SC SC SC B2 B2 B2 B1 B1 B1 SC SC B1 B2 B1 PoP 12hr 0 5 70 40 40 QPF 12hr 0 0 0.47 0.04 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C L C C C C C Tstms C C S S C Heat index 83 88 90 86 87 89 89 83 86 Max heat 88 90 83 89 92 83 86 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 69 85 71 86 70 85 69 86 Temp 72 71 80 78 73 73 82 79 72 71 81 79 71 70 81 79 Dewpt 68 69 71 68 69 68 67 65 64 63 61 61 61 62 62 63 PWind dir E E S W NW NW NW W Wind char LT LT LT GN GN GN GN GN Avg clouds B2 B2 B2 B2 B1 SC SC SC SC SC FW SC FW FW FW SC PoP 12hr 60 50 30 30 10 0 5 20 Rain shwrs C L C C C C S Tstms C S S S C $$ MDZ013-192000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 71 84 67 83 Temp 68 70 81 86 87 82 76 74 73 72 78 80 78 74 71 69 68 69 76 79 80 76 Dewpt 64 65 66 63 64 65 68 68 68 69 71 71 70 70 68 67 65 64 66 66 67 68 RH 87 84 60 46 46 56 76 82 84 90 79 74 76 87 90 93 90 84 71 64 65 76 Wind dir NW NW W W W S W NW N N E E E N N N N N NE E E SE Wind spd 3 2 3 4 4 2 2 2 1 2 4 4 5 3 3 3 4 4 6 5 4 3 Clouds FW FW CL FW FW FW SC SC SC SC B1 B2 B2 B2 B1 SC B1 SC SC SC B1 B1 PoP 12hr 0 10 80 30 20 QPF 12hr 0 0 0.59 0.01 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C D C C C S S C Tstms S S C C S Obvis PF Heat index 83 87 88 84 83 82 Max heat 87 88 85 86 83 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 68 83 68 85 66 84 66 84 Temp 69 70 78 77 71 70 82 77 68 69 80 77 68 68 80 77 Dewpt 68 69 71 71 70 70 70 68 66 65 64 64 63 64 65 66 PWind dir E E SW W NW NW NW W Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B2 B2 B2 B1 B1 SC SC SC SC FW FW FW FW FW FW PoP 12hr 50 50 40 20 10 0 5 20 Rain shwrs C C C C C S S S Tstms C S S S S $$ MDZ011-192000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 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 90 73 85 69 84 Temp 68 71 81 86 88 83 78 76 75 74 79 82 78 76 73 71 70 71 77 81 80 78 Dewpt 63 64 63 61 62 64 66 67 67 69 69 69 68 68 66 66 64 63 64 64 65 65 RH 84 79 54 43 42 53 67 74 76 84 72 65 71 76 79 84 81 76 64 56 60 64 Wind dir NW NW W W W SW W NW NW NE NE NE E N N N N N NE E E SE Wind spd 4 2 3 4 5 2 1 1 1 2 3 4 5 3 2 2 3 4 5 5 5 3 Clouds FW FW CL FW FW FW SC SC SC SC B1 OV B2 B2 SC SC B1 SC SC SC SC B1 PoP 12hr 0 10 80 20 20 QPF 12hr 0 0 0.80 0.01 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C D C S S S S C Tstms S S C S S Heat index 82 86 88 84 85 83 82 Max heat 86 88 82 85 85 83 83 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 71 84 71 86 69 85 67 85 Temp 72 73 81 77 72 72 82 78 71 70 81 78 70 70 81 78 Dewpt 67 67 69 67 69 68 66 64 64 62 59 59 61 61 61 61 PWind dir E E S W NW NW NW W Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B2 B2 B2 B1 B1 SC SC SC SC FW FW FW FW FW SC PoP 12hr 50 50 40 30 10 0 5 20 Rain shwrs C C C C C S C S Tstms C S S S C $$ WVZ052-192000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 86 67 80 62 80 Temp 61 65 78 84 85 80 73 71 68 70 74 77 75 72 68 65 63 65 72 79 77 73 Dewpt 59 62 62 64 65 66 66 66 66 67 68 69 68 68 65 64 63 63 63 64 66 65 RH 93 90 58 51 51 62 79 84 93 90 82 76 79 87 90 97100 93 73 60 69 76 Wind dir N N SW W W NW N N N N NE NE N N N N N N E E SE N Wind spd 0 0 3 5 6 3 0 0 0 0 3 5 5 0 0 0 3 4 4 5 5 0 Clouds FW FW CL FW B1 SC SC SC B1 B2 OV B2 OV B2 SC SC SC SC SC B1 B1 B1 PoP 12hr 0 30 80 10 20 QPF 12hr 0 0.01 0.48 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C L D S S C Tstms S C C Obvis PF PF Heat index 85 87 82 Max heat 85 87 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 63 81 63 82 60 81 60 82 Temp 65 66 79 75 68 67 80 76 64 64 80 75 62 63 80 76 Dewpt 64 65 69 67 66 66 65 62 61 61 60 59 59 60 62 62 PWind dir N SE SW W NW NW NW NW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B1 SC SC SC FW FW FW SC FW FW FW SC PoP 12hr 40 50 40 20 5 0 0 5 Rain shwrs C C C C C S Tstms S S S $$ VAZ506-192000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 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 89 70 84 65 83 Temp 65 68 81 86 87 82 75 73 71 71 79 80 80 74 70 67 66 67 77 81 81 77 Dewpt 61 63 65 65 66 66 66 67 67 68 71 70 71 70 68 67 66 66 67 68 68 68 RH 87 84 58 50 50 58 74 81 87 90 77 72 74 87 93100100 97 71 65 65 74 Wind dir N NW NW W W W NW N N NE E SW NW N N N N N NE E SE SE Wind spd 1 2 3 4 3 2 1 1 1 2 4 5 5 3 2 2 3 4 4 4 4 3 Clouds FW FW CL FW FW SC SC SC B1 B1 SC B2 B2 B2 B1 SC B1 B1 B1 B1 B1 B1 PoP 12hr 0 10 70 20 30 QPF 12hr 0 0 0.37 0.01 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C L S S C C C C C Tstms C C S S C Obvis PF Heat index 83 88 89 84 83 83 84 84 Max heat 88 90 83 88 84 84 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 66 84 66 85 64 84 63 84 Temp 67 68 81 77 70 69 81 77 67 66 80 77 66 66 81 78 Dewpt 67 68 72 71 70 69 70 69 65 65 66 65 63 64 67 67 PWind dir E E SW NW NW NW NW NW Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B1 B1 B1 SC SC SC SC SC FW FW FW FW FW SC PoP 12hr 50 50 30 20 10 0 10 10 Rain shwrs C C C C C S Tstms C S S S S $$ VAZ037-192000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 69 87 66 80 Temp 70 70 81 86 87 81 75 72 71 71 80 84 82 74 72 69 68 68 75 79 77 73 Dewpt 69 65 64 64 65 67 67 67 66 67 70 72 72 72 69 68 66 68 67 68 70 69 RH 97 84 56 48 48 63 76 84 84 87 72 67 72 93 90 97 93100 76 69 79 87 Wind dir N NW N SW SW SE N N N N S SW W NE N N N NE NE E E E Wind spd 0 1 0 4 4 1 0 1 0 0 2 5 6 5 0 0 3 4 5 5 4 1 Clouds B1 FW CL FW FW SC FW SC SC FW SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B2 PoP 12hr 5 5 50 40 50 QPF 12hr 0 0 0.08 0.01 0.15 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C C L Tstms C C S C C C Obvis PF PF Heat index 83 87 89 83 83 90 87 Max heat 88 91 90 90 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 66 83 65 85 63 84 63 84 Temp 69 67 81 75 68 67 83 76 66 65 82 76 65 65 82 77 Dewpt 67 67 71 69 68 67 65 65 63 62 61 62 61 61 62 64 PWind dir E SE W W NW W N SE Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B1 B1 B1 SC SC SC FW FW FW FW SC SC FW FW PoP 12hr 70 50 20 20 5 0 20 10 Rain shwrs L L C C S S S S Tstms C C S S $$ MDZ003-192000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 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 86 65 81 60 82 Temp 63 66 77 84 85 80 72 70 67 69 74 78 77 72 67 64 61 64 74 80 78 73 Dewpt 61 63 66 67 67 67 67 66 66 68 69 70 70 68 66 64 61 63 64 66 65 66 RH 93 90 69 57 55 65 84 87 97 97 84 76 79 87 97100100 97 71 62 64 79 Wind dir N S SW W W NW N NE NE NE NE NE N N NE N N N E E SE SE Wind spd 0 1 3 5 4 3 2 1 1 2 3 4 4 2 1 2 3 3 4 3 4 3 Clouds FW CL CL FW SC B1 SC SC B1 B1 OV B2 B2 B2 SC SC SC FW FW SC B1 B1 PoP 12hr 0 30 80 5 10 QPF 12hr 0 0.03 0.19 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C L D L S Tstms C S Obvis PF PF Heat index 87 88 82 82 Max heat 87 88 82 82 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 83 63 83 60 82 60 83 Temp 65 66 79 76 68 67 80 76 64 64 79 75 63 63 80 76 Dewpt 63 66 71 69 67 67 67 65 62 62 62 62 60 61 64 64 PWind dir E SE S W NW NW NW NW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B1 SC SC SC FW SC FW FW FW SC FW SC PoP 12hr 30 50 40 20 5 0 0 10 Rain shwrs S C C C C S Tstms S S S $$ MDZ017-192000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 74 88 71 83 Temp 71 75 83 87 88 82 79 77 76 78 82 84 82 75 74 75 72 74 80 80 81 75 Dewpt 70 71 69 68 67 70 71 73 71 73 75 76 76 73 72 71 71 70 71 71 71 71 RH 97 87 63 53 50 67 77 87 85 85 79 77 82 94 93 87 97 87 74 74 72 87 Wind dir NW NW NW W W S S SW SW S S S S N N N N NE NE NE E E Wind spd 4 4 4 4 4 3 4 4 3 3 5 8 6 4 4 4 6 8 8 5 5 4 Clouds FW FW CL FW CL CL FW FW SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B2 PoP 12hr 5 5 60 50 50 QPF 12hr 0 0 0.33 0.12 0.19 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C C C S S C C L Tstms S C C S S S C Heat index 87 91 91 86 89 93 89 83 83 85 Max heat 91 92 83 94 93 83 85 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 70 84 71 85 70 83 70 83 Temp 73 73 80 78 74 73 82 78 73 72 81 77 73 72 81 78 Dewpt 71 72 74 72 72 72 70 70 68 67 65 66 65 66 65 66 PWind dir SE E S W W NW W E Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B2 B1 B1 SC B1 SC SC FW FW FW SC FW SC PoP 12hr 70 60 30 30 20 5 10 10 Rain shwrs L L L L C S C S Tstms C C S S S S $$ WVZ502-192000- Petersburg WV 38.99N 79.15W Elev. 963 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 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 86 63 80 61 78 Temp 59 61 77 84 84 77 71 67 66 64 74 78 76 72 68 65 62 62 71 77 74 71 Dewpt 59 61 64 64 65 66 66 65 65 64 69 70 69 66 65 64 62 62 66 67 67 66 RH 100100 64 51 53 69 84 93 97100 84 76 79 81 90 97100100 84 71 79 84 Wind dir S S W W W W SW N N N N W N N N N N NE E E SE SE Wind spd 1 1 1 3 5 2 1 0 0 0 0 2 3 2 0 0 0 1 1 2 2 1 Clouds SC FW FW FW SC B1 SC B1 B2 B2 OV B2 B2 B2 B1 B1 B2 B2 B1 B2 B2 B2 PoP 12hr 0 40 80 30 60 QPF 12hr 0 0.05 0.23 0.01 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C L L C C S S C C L L C Tstms S S S C C S S S Obvis PF PF PF PF PF Heat index 85 86 Max heat 85 86 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 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 82 60 82 57 82 56 83 Temp 64 62 81 74 65 63 80 73 61 60 79 72 60 59 81 74 Dewpt 64 62 68 67 64 63 65 63 61 60 61 61 59 59 63 64 PWind dir SE W SW W W W W NW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B2 B1 SC SC FW FW SC FW FW FW FW SC FW PoP 12hr 30 50 20 20 5 5 5 10 Rain shwrs C S C C S S Tstms S C S S $$ MDZ014-192000- Annapolis MD 38.99N 76.49W Elev. 7 ft 500 AM EDT Wed Aug 19 2026 Date Wed 08/19/26 Thu 08/20/26 Fri 08/21/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 73 85 69 84 Temp 72 73 82 87 88 83 78 76 74 75 80 81 80 76 73 72 70 72 77 80 82 79 Dewpt 66 67 66 64 66 69 70 68 69 71 72 73 72 71 69 68 67 67 67 68 68 67 RH 81 81 58 46 48 63 76 76 84 87 77 77 77 85 87 87 90 84 71 67 63 67 Wind dir W NW NW W W S N N N NE NE S SE N N N N NE NE E E SE Wind spd 2 3 3 4 5 3 0 0 0 3 6 8 8 4 3 3 6 8 9 8 6 4 Clouds FW FW FW FW FW FW FW SC SC SC SC B2 B2 B2 B1 B1 B1 SC SC B1 B1 B1 PoP 12hr 0 5 70 40 30 QPF 12hr 0 0 0.61 0.03 0.04 Snow 12hr 00-00 00-00 00-00 Rain shwrs S L C C C C C C Tstms S C C S Heat index 84 88 90 87 84 86 84 83 85 Max heat 88 90 85 87 89 83 85 Date Sat 08/22/26 Sun 08/23/26 Mon 08/24/26 Tue 08/25/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 69 84 70 86 69 85 68 85 Temp 72 73 80 78 72 72 83 80 71 71 82 78 70 71 81 79 Dewpt 69 70 72 71 71 70 70 68 66 65 64 64 64 65 65 65 PWind dir SE E S W NW NW NW W Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B2 B1 B1 SC B1 SC SC FW FW FW FW FW SC PoP 12hr 60 60 40 30 10 0 5 20 Rain shwrs C L C L C S S C S Tstms C C S S S C $$