Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
106 FOUS51 KLWX 171737 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 137 PM EDT Sun Aug 17 2025 VAZ054-172000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 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 73 79 69 79 Temp 91 93 86 81 78 75 75 76 76 75 72 72 71 70 71 74 76 76 74 Dewpt 70 69 71 72 72 70 68 67 66 66 66 66 66 67 66 66 66 67 67 RH 50 46 61 74 82 84 79 74 71 74 81 81 84 90 84 76 71 74 79 Wind dir SW SW N S NW N N NE NE NE NE NE NE NE NE E E E E Wind spd 6 6 8 6 4 5 10 12 11 11 10 9 8 6 8 10 10 10 10 Clouds SC SC B2 B1 B1 B1 B2 OV OV OV B2 B1 B2 B2 B2 B2 B2 B2 B1 PoP 12hr 30 40 30 30 30 QPF 12hr 0.05 0.04 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C S S S C C C C C C Tstms S C Heat index 97 98 91 85 Max heat 97 99 89 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 69 85 69 86 69 86 Temp 71 71 79 77 73 72 82 78 72 71 82 77 72 72 83 78 Dewpt 67 67 66 67 68 66 63 63 64 63 62 63 65 66 64 65 PWind dir E E NE NE NE E S S Wind char LT GN GN GN LT LT LT GN Avg clouds B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 10 20 10 20 10 10 5 20 Rain shwrs S S S Tstms S $$ MDZ013-172000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 93 70 77 66 77 Temp 91 91 83 78 76 73 72 74 74 73 70 68 68 67 67 72 74 74 72 Dewpt 71 71 74 74 72 69 69 68 68 68 68 67 66 65 66 67 67 68 67 RH 52 52 74 88 87 87 90 82 82 84 93 97 93 93 97 84 79 82 84 Wind dir SW W NW W NW N N NE NE NE NE NE E NE E E E E E Wind spd 5 5 4 3 3 5 11 11 9 9 8 5 5 5 6 8 8 8 5 Clouds SC B1 B1 B1 B1 B2 B2 OV OV OV OV B2 B2 B2 B2 B1 B2 B1 B1 PoP 12hr 40 40 20 30 20 QPF 12hr 0.11 0.15 0 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S C C C C S S S S Tstms S C Heat index 98 98 90 Max heat 98 100 84 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 67 82 67 83 66 84 67 85 Temp 68 68 79 76 69 68 81 76 69 69 81 76 69 70 82 77 Dewpt 65 67 69 69 67 66 65 65 64 64 64 65 65 67 67 67 PWind dir E E NE NE N E S S Wind char LT LT LT GN LT LT LT LT Avg clouds B1 B1 B1 SC SC SC SC SC SC SC SC FW FW SC SC SC PoP 12hr 10 20 20 20 10 10 5 20 Rain shwrs S S S S Tstms S $$ MDZ011-172000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 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 97 75 82 71 83 Temp 92 96 86 83 80 77 77 78 79 78 74 75 72 72 73 76 80 80 76 Dewpt 71 70 71 72 71 68 66 65 65 65 64 65 65 65 64 63 63 64 64 RH 51 43 61 70 74 74 69 64 62 64 71 71 79 79 73 64 56 58 66 Wind dir SW S NW N NW N N NE NE NE NE NE E NE NE E E E E Wind spd 5 5 3 3 3 5 10 11 10 10 8 6 5 5 6 9 9 9 9 Clouds SC B1 B1 B2 B1 B2 B2 OV OV OV OV B2 B2 B2 B1 B1 B2 B2 B1 PoP 12hr 40 40 20 30 20 QPF 12hr 0.05 0.05 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S C C C C S S S S Tstms C C Heat index 99103 91 88 83 81 82 Max heat 99 104 90 83 82 81 83 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 72 88 71 89 73 90 Temp 72 74 83 78 75 75 86 79 75 74 87 79 75 75 87 80 Dewpt 64 65 66 67 66 64 62 62 63 62 61 62 64 65 64 65 PWind dir E E NE NE N E S S Wind char LT LT LT GN LT LT LT GN Avg clouds B1 B1 B1 SC SC SC SC SC FW FW SC SC FW SC SC SC PoP 12hr 20 20 20 20 10 10 5 20 Rain shwrs S S S S S Tstms S $$ WVZ052-172000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 92 66 78 63 77 Temp 92 92 81 76 73 70 70 73 76 76 72 67 66 64 66 70 73 74 72 Dewpt 68 68 71 70 68 66 63 63 64 64 64 64 64 63 64 64 65 65 65 RH 46 46 72 82 84 87 78 71 66 66 76 90 93 97 93 81 76 74 79 Wind dir W W NW NW N N N N NE NE E E E NE NE E E E E Wind spd 6 6 6 5 6 9 10 10 8 8 6 4 3 4 5 5 5 6 5 Clouds SC B1 B1 SC B1 B2 B1 B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 PoP 12hr 40 20 20 30 30 QPF 12hr 0.06 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S C C C C C C C C S Tstms C S Obvis PF PF Heat index 96 96 85 Max heat 96 96 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 82 64 83 63 85 63 86 Temp 66 66 77 75 68 68 79 75 66 66 82 76 66 67 83 77 Dewpt 64 64 66 66 66 63 64 64 63 62 62 63 62 63 65 65 PWind dir E E NE N N E SE S Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B2 B2 B1 SC B1 SC B1 FW SC SC SC SC SC SC B1 PoP 12hr 20 30 20 30 10 10 5 30 Rain shwrs S C S S S C C Tstms S $$ VAZ506-172000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 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 69 78 66 77 Temp 91 91 83 78 74 72 70 75 76 75 72 68 68 67 67 72 74 74 72 Dewpt 71 71 74 74 72 69 68 71 71 69 69 68 67 67 67 70 70 70 70 RH 52 52 74 88 93 90 93 87 85 82 90100 97100100 93 87 87 93 Wind dir W W N NW NW N N N NE NE NE NE NE NE NE E E E E Wind spd 4 5 6 4 4 8 10 10 9 9 8 5 4 4 5 5 5 8 6 Clouds SC B1 B1 B1 SC B2 B2 OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 PoP 12hr 40 30 30 30 30 QPF 12hr 0.08 0.01 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C S C C C C C C C C S Tstms S C Heat index 98 98 90 Max heat 98 101 84 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 82 66 83 65 85 65 85 Temp 68 68 79 76 69 68 81 76 68 67 82 76 68 68 83 77 Dewpt 67 68 71 69 68 67 67 66 65 64 66 65 64 67 68 67 PWind dir E E NE N N E S S Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 SC SC SC SC SC SC SC SC SC SC SC SC PoP 12hr 20 30 20 20 10 10 10 20 Rain shwrs S C S S S Tstms S $$ VAZ037-172000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 93 70 84 66 79 Temp 92 91 82 76 74 72 72 78 81 80 75 71 69 67 68 73 75 77 73 Dewpt 68 68 70 71 70 69 69 69 68 68 66 67 67 67 67 67 67 68 67 RH 46 47 67 85 87 90 90 74 65 67 74 87 93100 97 81 76 74 81 Wind dir NW SW S N NW N NE NE NE NE NE NE NE N NE NE NE NE NE Wind spd 3 4 4 3 2 3 4 9 9 10 8 5 4 4 4 4 5 5 5 Clouds SC SC B1 B2 B1 B1 B1 B1 B1 B1 B2 B1 B2 OV B2 B2 B2 B2 B1 PoP 12hr 20 30 30 40 30 QPF 12hr 0.05 0.03 0 0.03 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S C C C C C S S C C S Tstms S S Obvis PF PF PF Heat index 96 95 86 84 83 Max heat 96 97 83 84 85 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 67 82 67 83 65 84 65 83 Temp 69 69 79 76 69 69 80 75 67 68 81 75 67 67 81 75 Dewpt 68 68 67 67 66 66 65 64 64 64 63 63 64 64 65 65 PWind dir NE NE NE NE N SE S S Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B2 B1 B1 SC B1 SC B1 SC SC SC SC SC SC SC B1 PoP 12hr 20 30 20 30 20 20 20 30 Rain shwrs S C S S C S S S C Tstms S S S $$ MDZ003-172000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 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 67 77 64 77 Temp 90 90 81 76 72 69 68 73 76 75 72 67 66 65 65 69 72 74 71 Dewpt 70 69 72 71 70 66 63 65 66 66 64 65 64 63 63 65 66 66 65 RH 52 50 74 85 93 90 84 76 71 74 76 93 93 93 93 87 81 76 81 Wind dir W NW NW N N N N NE NE NE E E E E E E E SE E Wind spd 6 6 6 5 8 10 10 9 8 6 6 5 4 4 4 5 5 6 5 Clouds SC B1 B1 SC B1 B1 B1 B2 OV B2 B2 B2 B1 B2 B2 B2 B2 B2 B1 PoP 12hr 50 20 20 40 30 QPF 12hr 0.13 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S S C C C C S S C C S Tstms S C S Heat index 96 95 85 Max heat 96 98 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 81 64 83 63 85 64 87 Temp 67 66 77 74 68 67 79 75 66 66 82 76 67 68 84 78 Dewpt 65 65 68 67 66 65 66 65 64 62 64 63 62 64 67 66 PWind dir E E NE NE NE E SE S Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B2 B1 B1 B1 SC SC B1 FW FW SC SC FW FW SC B1 PoP 12hr 20 30 30 30 10 10 5 30 Rain shwrs S S C C S C C Tstms C $$ MDZ017-172000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 90 73 82 70 79 Temp 89 88 82 78 76 75 77 79 79 78 74 72 71 71 73 76 78 78 75 Dewpt 72 73 73 72 72 72 73 72 72 71 71 70 69 69 70 71 71 71 70 RH 57 61 74 82 87 90 87 79 79 79 90 93 93 93 90 85 79 79 84 Wind dir S S S SW SW NW N NE NE NE NE NE NE NE NE E E E E Wind spd 6 9 8 6 5 5 8 10 13 13 11 10 10 10 10 10 10 10 9 Clouds FW SC B1 B2 B2 B1 B1 B2 B2 OV OV B2 B1 B2 B1 B1 B1 B1 SC PoP 12hr 10 50 30 30 30 QPF 12hr 0 0.11 0 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C S S C C S S Tstms C S Heat index 96 96 87 Max heat 96 97 84 84 84 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 70 83 69 82 69 82 70 83 Temp 71 74 81 77 71 73 80 76 71 73 80 76 72 74 81 76 Dewpt 67 69 70 70 68 68 66 65 64 66 64 65 66 68 67 67 PWind dir E NE NE N N E S S Wind char LT GN GN GN LT LT LT GN Avg clouds SC SC SC SC SC SC SC SC FW FW FW FW SC SC SC SC PoP 12hr 10 20 10 20 5 10 10 10 Rain shwrs S S $$ WVZ502-172000- Petersburg WV 38.99N 79.15W Elev. 963 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 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 65 83 63 82 Temp 91 91 79 72 69 67 67 73 80 81 73 67 65 64 64 72 77 79 73 Dewpt 68 69 72 70 69 67 66 68 68 67 68 67 65 64 64 69 69 70 69 RH 47 49 79 93100100 97 84 67 63 84100100100100 90 76 74 87 Wind dir W W NW NW N N N N NE NE E E E E E SE SE SE SE Wind spd 6 8 4 2 2 2 3 3 4 6 4 2 2 2 2 2 3 5 4 Clouds SC B1 B1 B1 B1 B2 OV B2 B1 B1 B2 B1 B2 B2 OV B2 B1 B1 B1 PoP 12hr 40 30 30 30 40 QPF 12hr 0.02 0 0 0 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S S C C C C C C C C C C S Tstms S S Obvis PF PF PF PF PF Heat index 95 96 83 83 Max heat 95 97 83 84 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 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 63 83 61 86 63 87 Temp 66 66 81 74 66 65 78 74 64 63 82 74 64 65 84 75 Dewpt 66 65 69 69 66 65 68 67 63 62 66 66 62 62 67 68 PWind dir SE E NE NE N E S S Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC SC B1 PoP 12hr 20 50 30 50 10 20 10 40 Rain shwrs S S C C S C C S S C Tstms C S S C $$ MDZ014-172000- Annapolis MD 38.99N 76.49W Elev. 7 ft 137 PM EDT Sun Aug 17 2025 Date Sun 08/17/25 Mon 08/18/25 Tue 08/19/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 72 77 69 77 Temp 85 88 83 78 77 75 75 75 74 73 72 71 70 70 71 73 74 75 74 Dewpt 75 73 73 75 74 71 69 69 68 68 66 68 68 67 66 66 67 66 66 RH 72 61 72 91 90 87 82 82 82 84 81 90 93 90 84 79 79 74 76 Wind dir S S S S NW N NE NE NE NE NE NE NE NE NE E E E E Wind spd 8 9 6 4 3 4 11 12 11 11 10 10 8 9 9 10 10 10 9 Clouds SC SC B1 B2 SC B2 B2 OV OV OV B2 B2 B2 B2 B2 B1 B2 B1 B1 PoP 12hr 40 50 20 30 20 QPF 12hr 0.22 0.14 0 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S C C C C S S S S Tstms C Heat index 94 96 89 Max heat 94 96 86 Date Wed 08/20/25 Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 69 80 69 81 69 81 70 82 Temp 70 71 77 77 72 72 78 78 72 72 79 77 72 73 80 78 Dewpt 67 68 69 68 68 66 64 64 65 64 63 64 67 67 66 67 PWind dir E NE NE NE N E S S Wind char LT LT LT GN LT LT LT GN Avg clouds SC B1 B1 SC SC SC SC SC FW FW SC FW FW SC SC SC PoP 12hr 10 20 20 20 10 10 10 20 Rain shwrs S S S S Tstms S $$