Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
804 FOUS51 KLWX 111203 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 803 AM EDT Tue Aug 11 2026 VAZ054-112000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 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 73 88 73 90 Temp 82 88 87 82 78 75 74 74 80 85 86 82 76 75 73 75 83 88 89 85 Dewpt 69 68 68 69 70 70 69 69 68 69 67 69 70 70 70 70 71 71 69 69 RH 65 52 53 65 76 84 84 84 67 59 53 65 82 84 90 84 67 57 52 59 Wind dir W W W SW W W W NW NW NW NW E S SW SW W W W W NW Wind spd 5 8 9 6 8 8 8 8 9 8 6 6 6 6 8 6 9 9 9 6 Clouds B1 SC B1 B2 B2 B2 B1 B1 B1 SC B1 B1 B1 SC SC SC SC SC SC B1 PoP 12hr 40 30 20 20 20 QPF 12hr 0.10 0.08 0.02 0 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S S S S S S S S S S S C Tstms S C S S S S S Heat index 85 92 91 85 83 89 89 85 88 94 94 89 Max heat 92 93 83 89 90 83 94 96 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 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 75 87 69 83 69 86 73 87 Temp 77 75 84 82 73 70 81 77 70 71 84 81 75 75 85 82 Dewpt 70 70 68 64 60 58 58 59 60 63 66 67 68 70 72 69 PWind dir NW NW N N S S SW NW Wind char GN GN GN LT LT GN GN GN Avg clouds B1 B1 SC SC SC FW FW SC SC SC SC SC B1 B1 SC B1 PoP 12hr 30 30 5 0 10 30 50 40 Rain shwrs C C C C C C C Tstms S S C S S $$ MDZ013-112000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 70 87 70 90 Temp 81 87 86 79 75 73 72 72 79 84 85 79 74 72 70 72 82 87 88 84 Dewpt 70 70 70 71 71 71 70 70 69 68 68 70 71 70 70 71 73 73 72 72 RH 69 57 59 77 87 93 93 93 72 59 57 74 90 93100 97 74 63 59 67 Wind dir W W W SW W W W NW NW NW NW S S SW SW W W W W W Wind spd 6 6 8 4 4 4 4 4 6 4 4 3 2 2 2 2 4 6 5 3 Clouds B1 SC B1 B2 B2 B2 B2 B1 B1 SC SC B1 B1 B1 B1 SC SC SC SC B1 PoP 12hr 40 50 20 30 20 QPF 12hr 0.09 0.18 0 0.03 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S S S S S S S C C S S C Tstms S C S S S S Heat index 85 92 91 87 88 87 94 95 90 Max heat 92 94 87 89 94 96 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 72 87 66 82 66 86 70 87 Temp 75 73 84 79 69 67 80 75 69 69 83 79 73 72 84 79 Dewpt 71 70 70 67 61 60 61 62 62 65 68 69 69 71 74 71 PWind dir NW NW N N S S SW NW Wind char LT LT LT LT LT LT LT GN Avg clouds B1 B1 SC SC SC FW FW SC SC SC SC B1 B1 B1 SC B1 PoP 12hr 30 20 5 0 10 30 50 40 Rain shwrs C C S C C C S C Tstms S S C S S $$ MDZ011-112000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 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 87 73 91 Temp 82 87 86 80 76 74 73 73 80 83 84 79 75 73 73 75 85 87 89 84 Dewpt 69 68 69 70 71 70 69 69 67 67 67 69 68 69 69 70 69 70 70 70 RH 65 53 57 72 85 87 87 87 65 59 57 72 79 87 87 84 59 57 54 63 Wind dir W W W SW W W NW NW NW NW NW S S SW SW W W W W NW Wind spd 5 5 6 4 3 4 4 4 5 4 4 3 1 2 2 2 4 6 5 2 Clouds B2 B1 B1 B1 B2 B2 B2 B1 B1 SC SC B1 B1 B1 B1 SC SC SC SC B1 PoP 12hr 40 50 20 30 20 QPF 12hr 0.09 0.22 0 0.07 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S C S S S S S C C S S S S C Tstms C C S S S S Heat index 85 91 90 83 82 86 87 89 92 94 88 Max heat 91 94 86 89 92 94 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 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 74 88 67 82 68 85 72 86 Temp 76 75 85 80 69 68 79 75 68 70 81 77 73 74 83 79 Dewpt 70 68 66 62 58 56 56 57 60 61 64 66 68 69 71 69 PWind dir NW NW N N SW S SW NW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 SC SC SC FW FW FW SC SC SC B1 B1 B1 SC B1 PoP 12hr 30 20 5 0 10 30 50 40 Rain shwrs C C S C C C S C Tstms S S C S S $$ WVZ052-112000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 67 86 66 87 Temp 81 86 85 79 73 71 69 70 77 84 84 78 72 69 67 70 80 85 86 80 Dewpt 68 68 68 69 69 67 67 67 67 67 66 68 68 68 67 69 70 69 69 70 RH 65 55 57 72 87 87 93 90 71 57 55 71 87 97100 97 72 59 57 72 Wind dir W W W W W W W NW NW NW NW S N N SW N W W NW NW Wind spd 9 11 9 5 3 4 4 5 6 5 4 1 0 0 2 0 4 6 6 2 Clouds B1 B1 B1 B2 B2 B1 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC SC B1 SC SC PoP 12hr 30 40 20 30 20 QPF 12hr 0.04 0.20 0.01 0.05 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C S S C S S S S C C S S S S S S S Tstms S S C S S S S S Heat index 84 89 88 87 86 83 89 90 83 Max heat 89 91 87 87 89 91 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 68 84 60 80 61 85 67 85 Temp 71 71 82 77 64 63 79 75 66 65 82 79 71 70 83 79 Dewpt 69 68 66 63 59 57 57 59 59 61 66 68 68 69 70 69 PWind dir NW NW N N S S SW NW Wind char LT GN LT LT LT LT LT LT Avg clouds SC B1 SC SC SC FW FW SC SC SC SC B1 B1 B1 SC B1 PoP 12hr 40 20 5 0 20 30 50 30 Rain shwrs S C S S S S C C C S C Tstms S S S S C S S $$ VAZ506-112000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 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 69 86 70 89 Temp 82 87 87 81 74 72 71 71 79 84 84 79 74 72 70 72 83 87 88 83 Dewpt 69 69 70 70 70 70 68 68 68 69 68 70 72 71 70 71 74 74 73 73 RH 65 55 57 69 87 93 90 90 69 61 59 74 93 97100 97 74 65 61 72 Wind dir W W W SW W W NW NW NW NW NW E S SW W W NW W W NW Wind spd 5 8 6 4 4 4 5 5 6 5 3 3 2 2 2 3 5 5 4 2 Clouds B1 SC B1 B1 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC B1 PoP 12hr 30 30 20 20 20 QPF 12hr 0.08 0.08 0.01 0.02 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S S S S S S S S S S C Tstms S C S S S S Heat index 85 91 92 85 88 87 90 95 96 89 Max heat 91 93 88 88 95 97 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 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 86 64 82 64 86 69 87 Temp 74 72 83 79 68 65 80 76 67 67 83 79 72 71 84 80 Dewpt 71 71 72 68 63 61 64 64 63 65 71 71 70 71 75 73 PWind dir NW NW N N S S SW NW Wind char LT GN LT LT LT LT LT GN Avg clouds B1 B1 SC SC SC FW FW SC SC SC SC SC B1 B1 SC B1 PoP 12hr 30 30 5 0 10 30 50 40 Rain shwrs C C C S C C C C Tstms S S S S C S S $$ VAZ037-112000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 91 70 88 69 91 Temp 85 89 86 79 75 73 71 72 82 86 85 79 74 71 69 71 83 88 90 83 Dewpt 68 68 68 70 69 68 67 67 67 68 68 70 71 70 69 70 71 70 70 71 RH 57 50 55 74 82 84 87 84 61 55 57 74 90 97100 97 67 55 52 67 Wind dir W W W W W SW W W NW NW NW SE N N N N W W W NW Wind spd 5 5 6 4 4 4 3 2 4 4 4 2 0 0 0 0 3 5 5 3 Wind gust 16 Clouds B1 SC B1 B1 B1 B1 B1 SC SC B1 B1 SC SC B1 SC SC SC SC B1 SC PoP 12hr 20 30 30 20 30 QPF 12hr 0.04 0.05 0.06 0 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S C C S S C C S Tstms S S S S S S S S S Heat index 88 93 89 85 89 88 88 93 96 88 Max heat 94 93 89 91 93 96 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 71 87 66 84 66 87 70 89 Temp 74 72 86 79 71 67 82 77 69 68 85 81 73 72 87 81 Dewpt 71 71 70 69 65 60 61 64 63 63 68 69 69 70 71 71 PWind dir NW NW N E NE S SW W Wind char LT LT LT LT LT LT LT LT Avg clouds SC B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC B1 PoP 12hr 30 30 10 5 10 20 30 30 Rain shwrs S C C C S C S C Tstms S S C S S C $$ MDZ003-112000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 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 67 86 66 88 Temp 79 85 83 78 72 70 69 69 77 83 85 79 72 69 66 69 78 84 86 81 Dewpt 68 67 68 68 69 68 68 67 67 67 67 67 69 68 66 69 71 71 70 70 RH 69 55 61 71 90 93 97 93 71 59 55 67 90 97100100 79 65 59 69 Wind dir W W W W W W W NW NW NW NW NE S SW SW W W W NW NW Wind spd 8 10 9 5 3 3 3 4 5 4 4 2 2 2 2 2 4 5 6 3 Clouds B2 B1 B1 B2 B2 B2 B2 B1 B1 SC SC B1 B1 B1 B1 SC B1 B1 B1 B1 PoP 12hr 30 50 20 30 30 QPF 12hr 0.07 0.17 0 0.05 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S C S S C C S S S S C C C Tstms S C S S S S S S Heat index 88 86 86 88 89 91 85 Max heat 88 89 86 88 89 91 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 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 85 60 81 61 85 67 84 Temp 71 70 84 77 64 63 78 75 65 66 81 78 71 70 82 78 Dewpt 69 68 66 63 59 58 59 60 59 61 67 68 68 69 71 69 PWind dir NW NW N N SE S SW NW Wind char LT GN LT LT LT LT LT LT Avg clouds B1 B1 SC SC FW FW FW SC SC SC SC B1 B2 B1 SC B1 PoP 12hr 40 20 5 0 20 40 60 30 Rain shwrs C C S S S C L C S C Tstms S S C S S $$ MDZ017-112000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 92 73 87 74 91 Temp 84 89 87 81 77 76 74 75 81 85 85 80 77 75 74 77 84 89 90 84 Dewpt 70 70 71 73 73 72 72 71 70 70 69 71 71 72 72 73 72 73 72 73 RH 63 54 59 77 87 87 93 87 69 61 59 74 82 90 93 87 67 59 56 70 Wind dir W NW W NE W W NW NW NW N N E S SW SW W W W SW S Wind spd 5 6 6 4 6 6 8 8 9 6 5 3 4 3 3 4 4 5 5 4 Clouds SC SC SC B1 B1 B1 B1 SC B1 B1 SC B1 B1 SC SC SC SC SC SC SC PoP 12hr 30 30 20 20 20 QPF 12hr 0.04 0.10 0.03 0.01 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C S S S S S S S S S Tstms C C S S Heat index 88 94 93 86 85 90 89 83 90 97 97 90 Max heat 94 95 90 90 97 99 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 76 88 71 81 70 85 74 86 Temp 78 78 86 81 76 72 80 77 73 74 83 80 76 76 84 81 Dewpt 73 73 71 68 65 62 61 61 63 66 67 69 70 72 73 72 PWind dir NW N N N S S SW NW Wind char LT GN GN LT LT GN GN GN Avg clouds SC SC B1 B1 SC FW FW FW SC SC SC SC B1 SC SC B1 PoP 12hr 20 40 10 5 10 20 40 40 Rain shwrs S S C C S C S C Tstms S S S S S S $$ WVZ502-112000- Petersburg WV 38.99N 79.15W Elev. 963 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 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 67 87 65 89 Temp 79 85 85 78 73 70 68 68 79 85 85 77 71 68 66 67 81 86 88 80 Dewpt 68 67 68 67 66 66 65 65 67 67 67 69 69 68 66 67 71 70 70 71 RH 69 55 57 69 79 87 90 90 67 55 55 76 93100100100 72 59 55 74 Wind dir W W W W SW W SW SW NW NW NW W W SW W W W W W W Wind spd 5 8 8 4 4 2 3 2 3 3 4 2 2 1 1 1 1 4 5 3 Wind gust 18 16 Clouds B1 B1 B1 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC B1 B1 B1 PoP 12hr 30 60 40 40 30 QPF 12hr 0.05 0.18 0.07 0.06 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S C C C C S S C C C C C C C Tstms C S C C C C S S S Heat index 88 88 88 88 85 91 93 83 Max heat 88 91 88 88 91 93 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 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 86 59 85 61 89 68 87 Temp 71 67 83 78 64 61 82 77 65 64 85 80 72 69 85 79 Dewpt 69 67 70 67 62 59 64 64 62 63 70 70 68 69 72 70 PWind dir W NW NW NE SW SW SW NW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 SC SC SC SC SC B1 SC SC B1 B1 B1 B1 B1 PoP 12hr 50 30 10 10 20 30 50 40 Rain shwrs C C C S S S C C C S C Tstms S C S S C S S $$ MDZ014-112000- Annapolis MD 38.99N 76.49W Elev. 7 ft 803 AM EDT Tue Aug 11 2026 Date Tue 08/11/26 Wed 08/12/26 Thu 08/13/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 73 86 73 89 Temp 84 87 86 81 76 75 73 75 81 85 85 82 76 74 73 75 85 89 88 84 Dewpt 70 70 71 71 72 70 70 69 69 68 68 71 71 70 71 71 71 72 71 72 RH 63 57 61 72 87 84 90 82 67 57 57 69 85 87 93 87 63 57 57 67 Wind dir W W SW SW W W W NW NW N W SE N N SW W W W W W Wind spd 6 6 6 4 4 5 5 6 6 5 5 4 0 0 2 3 6 8 6 3 Clouds B1 SC B1 B2 B2 B2 B2 B1 B1 SC SC B1 B1 B1 B1 SC SC SC SC B1 PoP 12hr 30 40 20 30 20 QPF 12hr 0.09 0.16 0 0.02 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S S S S S S S C C S S C Tstms S C S S S S Heat index 88 92 91 85 84 88 88 86 90 96 94 90 Max heat 92 94 88 89 83 96 96 Date Fri 08/14/26 Sat 08/15/26 Sun 08/16/26 Mon 08/17/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 75 86 69 83 69 85 72 87 Temp 77 77 86 81 72 70 81 77 71 72 83 80 75 75 86 81 Dewpt 71 70 68 67 62 60 60 61 63 65 68 69 70 71 74 72 PWind dir NW NW N N S S SW NW Wind char LT GN LT LT LT LT LT GN Avg clouds B1 B1 SC SC SC FW FW SC SC SC SC B1 B1 B1 SC B1 PoP 12hr 30 20 5 0 10 30 50 40 Rain shwrs C C S C C C S C Tstms S S C S S $$