Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
394 FOUS51 KLWX 170904 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 504 AM EDT Thu Sep 17 2026 VAZ054-172000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 85 68 81 Temp 69 78 85 88 83 77 75 75 74 80 85 85 79 74 70 68 68 76 80 79 75 Dewpt 66 67 68 70 71 71 71 70 70 68 65 62 61 60 59 59 57 58 58 59 62 RH 90 69 57 55 67 82 87 84 87 67 51 46 54 62 68 73 68 54 47 50 64 Wind dir S S S SW S S SW NW N N N N N NE NE NE NE E E SE SE Wind spd 4 5 6 8 5 5 4 5 8 10 9 10 9 10 10 9 9 9 8 10 11 Clouds B1 SC SC B1 B1 B1 SC SC SC SC SC SC FW FW SC SC SC SC B1 B2 B2 PoP 12hr 30 30 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S Tstms C S Heat index 88 93 88 83 87 86 81 Max heat 88 93 87 86 81 81 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 86 69 77 65 73 63 71 Temp 70 71 83 80 72 69 74 73 68 66 70 69 65 63 69 69 Dewpt 65 66 68 70 69 65 64 65 65 63 63 63 62 61 61 63 PWind dir SE SW NW NE NE E E E Wind char GN GN GN GN GN BZ BZ BZ Avg clouds B2 B1 B1 B1 B2 B1 B1 B1 B2 B2 B2 B2 B2 B2 B1 B1 PoP 12hr 5 50 60 30 30 40 40 30 Rain shwrs C L S C C C S C C C C C C Tstms S C S S S $$ MDZ013-172000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 71 84 64 79 Temp 70 80 85 86 79 75 73 73 71 78 83 83 77 70 66 64 65 73 77 78 73 Dewpt 66 67 68 69 71 71 70 70 69 66 63 61 61 61 59 57 57 60 59 61 64 RH 87 65 57 57 77 87 90 90 93 67 51 47 58 73 78 78 75 64 54 56 73 Wind dir S S S SW S SW W NW N N N N N NE NE NE NE E E E SE Wind spd 3 5 6 6 3 2 2 3 6 9 8 8 6 6 5 5 5 6 5 5 8 Clouds B1 SC SC SC B1 B1 SC SC SC B1 SC FW FW SC SC SC SC SC SC B1 B1 PoP 12hr 30 40 0 0 0 QPF 12hr 0.05 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S C S Tstms S C Heat index 82 88 90 84 83 Max heat 88 91 84 85 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 66 84 65 75 61 72 59 71 Temp 68 68 81 78 69 66 72 70 64 63 70 67 61 61 69 67 Dewpt 65 67 70 72 68 65 65 66 64 63 63 64 61 61 62 64 PWind dir SE SW N NE NE E E E Wind char LT GN LT GN GN GN GN GN Avg clouds B2 B2 B1 B2 B2 B1 B1 B1 B2 B2 B2 B2 B2 B1 B1 B2 PoP 12hr 10 60 60 30 30 40 30 30 Rain shwrs S L L S C S C S S C C C C C Tstms C C S S $$ MDZ011-172000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 72 85 65 80 Temp 70 79 85 88 82 76 75 73 73 80 85 84 77 71 67 65 66 73 78 79 74 Dewpt 65 67 67 69 70 70 70 69 68 65 62 60 60 58 57 56 53 55 54 56 59 RH 84 67 55 54 67 82 84 87 84 60 46 44 56 63 70 73 63 53 43 45 59 Wind dir S S S S S S W NW N N N N N N NE NE NE E E SE SE Wind spd 2 5 6 6 3 1 1 3 6 9 9 9 6 5 4 4 4 6 5 5 9 Clouds SC SC SC SC B1 B1 B1 SC SC B1 SC FW FW SC SC SC SC SC SC B1 B1 PoP 12hr 30 50 0 0 0 QPF 12hr 0.07 0.05 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S C S Tstms S C Heat index 88 92 86 82 86 84 Max heat 88 92 86 85 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 67 76 64 73 61 73 Temp 69 70 81 78 70 67 74 71 65 65 70 68 63 63 70 68 Dewpt 64 65 66 69 67 62 60 61 62 60 58 59 59 57 57 59 PWind dir SE SW N NE NE E E E Wind char LT GN LT GN LT GN GN GN Avg clouds B2 B2 B2 B2 B2 B1 B1 B1 B2 B2 B2 B2 B2 B1 B2 B1 PoP 12hr 10 70 60 30 30 40 30 30 Rain shwrs S L L S C S C S S C C C C C Tstms C S S S $$ WVZ052-172000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 69 83 59 77 Temp 68 80 86 85 77 73 72 71 70 78 81 81 73 67 63 61 60 69 75 77 73 Dewpt 66 69 71 71 71 70 69 69 68 66 63 61 61 59 58 56 54 53 54 57 60 RH 93 69 61 63 82 90 90 93 93 67 54 51 66 75 84 84 81 57 48 50 64 Wind dir N N SW SW SW N NW NW N N N N NE NE N N N E SE SE SE Wind spd 0 0 5 5 3 0 1 4 5 9 9 9 6 4 3 4 4 3 6 6 8 Clouds SC B1 B2 B2 B1 SC FW SC SC B1 B1 FW SC SC SC SC B1 B1 B2 B1 B1 PoP 12hr 60 30 5 0 0 QPF 12hr 0.07 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S L C C Tstms C C S Heat index 83 91 90 82 82 Max heat 91 93 82 84 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 63 83 62 71 59 68 56 68 Temp 66 65 81 76 67 63 69 68 63 61 66 65 60 57 66 64 Dewpt 63 64 69 69 67 61 60 62 62 60 60 61 59 56 57 60 PWind dir S SW N NE E E E E Wind char GN GN LT LT LT GN LT GN Avg clouds B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2 B1 B2 PoP 12hr 10 70 60 30 40 50 40 40 Rain shwrs C L L C C C C C C C C C C C Tstms C S S $$ VAZ506-172000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 85 63 80 Temp 67 78 86 86 78 74 73 72 71 79 85 83 76 70 66 64 63 73 77 79 74 Dewpt 66 68 69 71 72 72 70 69 70 68 66 64 63 62 61 58 57 60 62 63 66 RH 97 71 57 61 82 93 90 90 97 69 53 53 64 76 84 81 81 64 60 58 76 Wind dir S S S SW SW SW W NW N N N N NE NE NE N NE E SE SE SE Wind spd 3 4 5 5 3 2 2 4 6 9 9 8 6 5 4 4 4 4 4 5 6 Clouds FW FW SC B1 B1 B2 SC SC SC SC SC FW FW FW SC SC SC B1 B1 B1 B1 PoP 12hr 50 30 5 0 0 QPF 12hr 0.01 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C S Tstms S C S Heat index 90 91 87 84 Max heat 90 93 87 87 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 65 85 64 76 61 72 58 71 Temp 67 67 82 78 69 65 73 70 65 63 69 67 62 60 68 67 Dewpt 66 66 72 72 69 65 67 67 65 62 66 66 62 60 64 66 PWind dir SE SW N NE NE E E E Wind char GN GN LT GN LT GN GN GN Avg clouds B2 B1 B1 B2 B2 B1 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 5 50 60 30 40 40 40 30 Rain shwrs C L S C C C C C C C C C C Tstms C C S S $$ VAZ037-172000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 69 84 65 77 Temp 65 82 89 84 76 73 72 71 70 82 84 83 76 72 69 66 65 72 76 77 73 Dewpt 65 68 69 71 71 71 70 69 70 70 70 69 68 67 64 62 61 61 62 64 65 RH 100 63 52 65 85 93 93 93100 67 63 63 76 84 84 87 87 68 62 64 76 Wind dir N S S W SW N N N N N NE NE NE NE NE NE NE NE E SE E Wind spd 0 3 5 4 2 0 0 0 0 4 6 6 5 5 5 8 6 5 4 4 1 Clouds CL FW B1 B2 B2 SC SC SC SC SC B1 SC SC B1 B1 B1 B1 B1 B1 B1 B1 PoP 12hr 60 5 40 10 10 QPF 12hr 0.19 0 0.04 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C Tstms C C S S Obvis PF PF PF Heat index 85 94 89 86 88 87 Max heat 94 92 88 88 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 85 65 75 62 70 59 68 Temp 66 66 83 77 70 66 74 70 66 63 68 67 63 60 66 66 Dewpt 66 66 69 72 70 66 66 67 66 63 66 66 63 60 63 65 PWind dir S SW NW NE NE NE NE NE Wind char LT LT LT LT LT GN GN GN Avg clouds B1 B1 SC B1 B1 B1 B1 B1 B1 B2 B1 B2 B2 B2 B2 B2 PoP 12hr 5 30 30 30 50 60 50 40 Rain shwrs C C C C C C L C C C C Tstms S S S S S $$ MDZ003-172000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 87 69 82 58 78 Temp 69 79 85 86 79 73 72 71 70 77 81 81 73 65 61 59 60 69 76 77 72 Dewpt 67 69 71 72 72 71 70 69 68 65 62 60 59 59 57 54 53 54 57 59 61 RH 93 72 63 63 79 93 93 93 93 67 53 49 62 81 87 83 78 59 52 54 68 Wind dir S SW SW SW W W NW N N N N N NE NE NE NE NE E SE SE SE Wind spd 2 3 4 5 3 2 2 4 5 8 8 8 5 6 6 5 4 3 4 6 6 Clouds SC B2 B2 B2 B2 B1 SC SC SC SC SC FW SC SC SC SC SC B1 B1 B1 B2 PoP 12hr 70 30 0 0 0 QPF 12hr 0.15 0.06 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C L C C Tstms S C C S Heat index 90 92 82 82 Max heat 90 92 82 83 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 64 82 61 72 58 68 55 69 Temp 66 66 79 75 66 63 69 68 62 59 65 65 58 57 66 64 Dewpt 63 65 71 70 66 61 62 63 62 59 61 62 58 57 59 62 PWind dir SE SW N NE E E E E Wind char GN GN GN LT LT GN GN GN Avg clouds B2 B2 B2 B2 B2 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 20 80 60 30 40 50 40 30 Rain shwrs S C D L C C C C C C C C C C C Tstms C S S $$ MDZ017-172000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 86 72 83 68 80 Temp 70 78 84 84 78 76 74 73 75 81 83 82 77 74 70 69 70 76 79 78 73 Dewpt 66 66 67 69 69 70 69 70 71 70 68 66 67 66 66 64 63 64 63 63 66 RH 87 67 57 61 74 82 84 90 87 69 61 58 71 76 87 84 78 66 58 60 79 Wind dir S S S S S S SW W N N N N N NE NE NE NE E E E SE Wind spd 5 8 8 9 6 5 4 4 5 11 12 11 6 6 6 8 9 8 5 6 9 Clouds SC SC SC FW FW SC SC SC FW B1 SC SC FW FW FW FW SC SC SC SC B1 PoP 12hr 10 10 0 0 0 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Heat index 87 88 85 86 84 Max heat 87 88 86 86 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 69 85 69 78 67 76 65 74 Temp 71 72 83 79 73 71 76 73 69 69 73 71 68 68 72 70 Dewpt 67 68 69 71 71 69 68 68 68 67 66 66 65 65 64 65 PWind dir S S NW NE NE NE NE NE Wind char LT GN LT GN GN BZ GN BZ Avg clouds B1 B1 SC B1 B2 B2 B1 B1 B1 B2 B1 B1 B1 B2 B1 B1 PoP 12hr 5 30 60 40 30 40 30 30 Rain shwrs C L S S C C S C C C C C C Tstms C S S $$ WVZ502-172000- Petersburg WV 38.99N 79.15W Elev. 963 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 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 68 84 60 80 Temp 67 82 87 87 78 73 70 70 68 78 84 84 75 68 64 62 60 68 77 79 73 Dewpt 66 72 71 72 72 69 68 68 68 69 67 67 66 65 62 61 59 62 64 65 65 RH 97 72 59 61 82 87 93 93100 74 57 57 74 90 93 97 96 81 64 62 76 Wind dir SW W NW W SW S NW N N N N N N NE E E E SE SE SE SE Wind spd 2 1 4 4 2 2 1 0 0 2 4 4 2 2 1 1 1 1 3 4 4 Clouds SC SC B1 B1 B1 B1 SC B1 B1 SC B1 B1 B1 B1 B1 B1 B1 B2 B2 B1 B1 PoP 12hr 40 20 50 20 5 QPF 12hr 0.07 0 0.05 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S C C S S Tstms C S S S Obvis PF PF PF PF Heat index 87 93 94 87 87 Max heat 94 95 87 87 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 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 86 62 75 59 73 56 70 Temp 65 65 83 76 68 64 72 69 63 60 70 67 61 57 67 65 Dewpt 64 64 72 70 67 64 67 65 63 60 66 65 61 57 62 62 PWind dir S SW NW NE E SE E E Wind char LT LT LT LT LT LT LT LT Avg clouds SC B1 B1 B2 B2 B1 B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 5 60 70 60 50 60 60 40 Rain shwrs C L L C C L C C C L L C C C Tstms S C S S S $$ MDZ014-172000- Annapolis MD 38.99N 76.49W Elev. 7 ft 504 AM EDT Thu Sep 17 2026 Date Thu 09/17/26 Fri 09/18/26 Sat 09/19/26 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 85 72 85 67 78 Temp 69 79 84 85 80 75 73 73 74 80 84 84 78 72 69 67 68 74 78 78 75 Dewpt 66 68 69 70 71 71 71 70 70 67 66 64 64 64 62 60 57 59 59 59 63 RH 90 69 61 61 74 87 93 90 87 65 55 51 62 76 78 78 68 59 52 52 66 Wind dir S S S S S SW SW NW N N N N N NE NE NE NE E E E SE Wind spd 5 9 11 11 6 3 1 4 8 11 11 10 8 8 8 8 9 9 6 9 10 Clouds B1 SC SC SC B1 B1 SC SC SC SC SC FW FW SC SC SC SC SC B1 B1 B2 PoP 12hr 30 30 5 0 0 QPF 12hr 0.15 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S Tstms S S Heat index 88 90 83 82 86 85 Max heat 88 90 86 87 Date Sun 09/20/26 Mon 09/21/26 Tue 09/22/26 Wed 09/23/26 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 69 82 66 77 63 75 61 74 Temp 69 71 82 78 71 68 74 72 65 65 72 69 64 63 72 70 Dewpt 66 66 68 72 69 65 66 66 64 63 64 64 62 61 63 64 PWind dir SE SW NW NE NE E E E Wind char GN GN LT GN GN GN GN BZ Avg clouds B2 B2 B1 B1 B2 B1 B1 B2 B2 B2 B2 B2 B2 B1 B1 B2 PoP 12hr 5 50 60 30 30 30 30 30 Rain shwrs C L S C S C S C C C C C C Tstms S C S S $$