Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
304 FOUS51 KLWX 180837 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 437 AM EDT Mon Aug 18 2025 VAZ054-182000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 77 69 78 70 83 Temp 75 74 75 74 74 72 72 71 70 70 73 74 75 73 72 71 70 71 77 80 81 78 Dewpt 70 67 66 65 66 66 66 66 66 66 66 66 66 66 66 67 67 68 69 68 68 68 RH 84 79 74 74 76 81 81 84 87 87 79 76 74 79 81 87 90 90 76 67 65 71 Wind dir N N NE NE NE NE NE NE NE NE NE E E E E E E E E E E E Wind spd 5 10 12 11 11 10 9 8 6 10 10 9 10 10 8 5 5 6 6 8 9 9 Clouds B1 B1 OV OV OV OV OV OV OV OV B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 SC SC PoP 12hr 20 20 20 10 20 QPF 12hr 0 0.04 0.11 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S S S S Heat index 83 84 Max heat 83 84 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 71 84 69 85 70 86 71 86 Temp 74 72 81 78 73 70 82 77 73 71 83 78 73 72 83 77 Dewpt 69 68 65 65 65 64 62 63 66 66 64 65 66 67 65 65 PWind dir NE NE N E S S S SW Wind char GN GN GN GN LT GN GN GN Avg clouds SC SC SC SC FW SC SC SC FW SC SC SC SC SC B1 B1 PoP 12hr 10 20 10 10 5 20 20 40 Rain shwrs S S S S S C Tstms S S $$ MDZ013-182000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 76 66 75 67 81 Temp 73 72 72 73 72 71 69 68 67 67 71 73 74 71 69 69 69 69 75 79 80 76 Dewpt 69 67 67 68 67 67 66 66 65 65 65 67 68 67 66 66 66 68 70 70 70 70 RH 87 84 84 84 84 87 90 93 93 93 81 81 82 87 90 90 90 97 84 74 72 82 Wind dir N N NE NE NE NE NE E NE NE E E E E E E E E E E E E Wind spd 5 11 11 9 9 8 5 5 5 6 8 8 8 5 5 3 3 4 5 5 5 5 Clouds B2 B1 B2 OV OV OV B2 OV OV B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 SC SC PoP 12hr 20 20 20 10 20 QPF 12hr 0 0.02 0.02 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S S S Heat index 83 Max heat 83 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 68 83 67 84 68 85 69 86 Temp 71 70 81 77 70 70 81 76 70 70 82 77 72 71 83 76 Dewpt 68 68 68 66 65 64 66 65 66 67 67 68 67 69 69 68 PWind dir NE NE N E S S S SW Wind char LT GN LT LT LT LT LT LT Avg clouds SC SC SC SC SC SC FW FW FW SC SC SC SC B1 B1 B1 PoP 12hr 10 20 10 5 5 20 30 40 Rain shwrs S S S C S C Tstms S S S $$ MDZ011-182000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 82 70 82 72 87 Temp 77 75 77 77 77 75 75 74 73 70 76 77 79 77 75 74 74 72 80 83 84 81 Dewpt 68 65 63 65 64 65 64 64 64 62 62 63 63 64 65 65 65 66 67 67 67 67 RH 74 71 62 67 64 71 69 71 73 76 62 62 58 64 71 74 74 81 65 59 57 63 Wind dir N N NE NE NE NE NE E NE NE E E E E E E E E E E E E Wind spd 5 10 11 10 10 8 6 5 5 5 8 8 8 5 4 3 3 3 5 5 6 5 Clouds B2 B2 B2 OV OV OV B2 B2 B2 B2 B1 B2 B2 B1 SC SC B1 B1 B1 B1 B1 SC PoP 12hr 20 20 20 10 20 QPF 12hr 0.03 0.02 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S S Heat index 82 86 87 83 Max heat 86 87 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 73 88 71 88 72 89 73 90 Temp 77 73 85 82 76 71 85 81 76 73 86 82 77 74 87 81 Dewpt 68 66 65 63 64 62 61 62 65 64 64 64 66 66 65 65 PWind dir NE NE N E S S S SW Wind char LT GN LT LT LT GN LT LT Avg clouds SC SC SC SC FW SC FW SC FW SC SC SC SC B1 B1 B1 PoP 12hr 20 20 10 5 5 20 30 40 Rain shwrs S S S S S C S C Tstms S S S $$ WVZ052-182000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 77 64 75 65 82 Temp 70 69 73 75 75 72 67 66 65 66 70 72 74 71 68 67 67 68 74 79 80 76 Dewpt 66 63 63 63 64 64 64 64 63 63 63 64 64 65 65 65 65 65 66 67 67 68 RH 87 81 71 66 69 76 90 93 93 90 78 76 71 81 90 93 93 90 76 67 65 76 Wind dir N N N NE NE E E E NE NE E E E E SE SE SE SE SE SE SE E Wind spd 9 10 10 8 8 6 4 3 4 5 5 5 6 5 4 3 3 4 5 5 5 3 Clouds B1 B1 B2 B2 B2 B2 OV B2 OV B2 B2 B2 B2 B1 B2 B1 B2 B2 B1 B1 B1 SC PoP 12hr 10 20 20 10 30 QPF 12hr 0 0 0 0 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S C C S Tstms S Obvis PF PF Heat index 82 Max heat 82 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 66 83 63 85 64 85 64 84 Temp 69 69 81 76 66 66 81 76 68 68 82 77 67 68 82 75 Dewpt 67 66 65 65 63 62 63 63 63 64 65 65 65 65 63 62 PWind dir NE NE N NE SE S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 SC FW SC FW FW SC SC SC SC SC SC SC B1 PoP 12hr 20 20 10 10 5 30 20 40 Rain shwrs S S S C S S S C Tstms S S S $$ VAZ506-182000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 77 66 75 67 82 Temp 72 70 73 74 72 71 69 68 67 67 71 73 72 71 69 69 68 68 75 80 80 76 Dewpt 69 68 70 69 68 67 67 66 66 67 69 70 69 68 68 68 67 68 72 72 71 71 RH 90 93 90 84 87 87 93 93 97100 93 90 90 90 97 97 97100 90 77 74 85 Wind dir N N N NE NE NE NE NE NE NE E E E E E E E E E E E E Wind spd 8 10 10 9 9 8 5 4 4 5 5 5 6 5 4 3 2 3 4 5 5 5 Clouds B2 B1 B2 OV OV OV OV B2 OV B2 B2 B2 B2 B2 B1 B1 B1 B1 B2 B1 B1 B1 PoP 12hr 20 20 20 20 20 QPF 12hr 0 0.02 0.05 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S S S S S S S Heat index 84 83 Max heat 84 85 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 83 66 86 67 86 68 86 Temp 70 69 81 76 68 68 82 76 70 69 83 78 71 70 84 76 Dewpt 69 69 69 68 65 65 67 66 66 67 69 69 68 69 69 66 PWind dir NE NE N NE S S S SW Wind char LT GN LT LT LT GN LT LT Avg clouds SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC B1 PoP 12hr 20 20 10 10 5 20 20 40 Rain shwrs S S S S S S S C Tstms S S $$ VAZ037-182000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 80 66 78 67 83 Temp 72 72 77 79 77 72 69 67 67 67 72 75 76 72 70 69 68 68 75 80 81 76 Dewpt 69 68 68 67 67 66 66 66 66 67 67 67 67 67 68 68 67 68 68 68 68 68 RH 90 87 74 67 71 81 90 97 97100 84 76 74 84 93 97 97100 79 67 65 76 Wind dir N NE NE NE NE NE NE NE N NE NE NE NE NE NE NE NE NE NE E E NE Wind spd 3 4 9 9 10 8 5 4 4 5 5 5 5 5 2 2 2 2 3 4 5 4 Clouds B1 SC B1 B2 B2 B1 OV OV OV B2 B2 B2 B1 SC B1 B2 B2 B2 B1 B1 B1 SC PoP 12hr 20 20 30 20 30 QPF 12hr 0 0.01 0.02 0 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C C C C S S C C S Tstms S S Obvis PF PF PF PF Heat index 83 84 Max heat 83 84 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 68 83 66 83 65 83 66 84 Temp 70 69 81 76 68 68 81 75 68 67 80 74 69 68 82 74 Dewpt 68 68 66 66 65 65 64 64 65 65 66 66 66 66 65 64 PWind dir NE NE N SE S S SW SW Wind char LT LT LT LT LT LT LT LT Avg clouds SC B1 SC B1 SC SC SC SC SC B1 B1 B1 B1 B1 SC B1 PoP 12hr 20 30 10 20 10 30 30 40 Rain shwrs S S C S C C S S C Tstms S S S $$ MDZ003-182000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 78 64 76 65 81 Temp 69 68 73 75 75 72 68 67 66 66 69 72 74 71 68 67 67 68 73 78 79 76 Dewpt 66 64 65 65 65 64 63 64 62 63 64 65 65 65 65 65 65 65 68 70 69 68 RH 90 87 76 71 71 76 84 90 87 90 84 79 74 81 90 93 93 90 84 76 72 76 Wind dir N N NE NE NE E E E E E E E E E SE SE SE SE SE SE SE E Wind spd 10 10 9 8 6 6 5 4 4 4 5 5 5 5 5 4 3 4 4 5 5 4 Clouds B1 SC B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B2 B2 B2 B2 B2 B2 B1 B1 PoP 12hr 10 20 20 20 30 QPF 12hr 0 0 0 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S S S C C C Tstms S Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 83 63 86 65 87 66 86 Temp 69 69 80 76 67 66 82 77 68 69 83 78 69 68 83 75 Dewpt 68 67 67 65 63 63 65 64 64 65 68 66 66 66 65 63 PWind dir NE NE N NE SE S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 SC SC FW FW FW FW FW SC SC B1 B1 B1 SC B1 PoP 12hr 30 20 10 5 5 20 30 40 Rain shwrs C S S S C C S C Tstms S S S $$ MDZ017-182000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 70 78 70 83 Temp 75 77 78 77 76 73 72 72 71 73 75 76 76 74 72 71 70 74 78 81 81 77 Dewpt 72 75 73 72 72 70 70 69 69 71 71 71 70 70 69 69 68 71 70 71 71 71 RH 90 94 85 85 87 90 93 90 93 93 87 85 82 87 90 93 93 90 76 72 72 82 Wind dir NW N NE NE NE NE NE NE NE E NE E E E E E E E E NE NE E Wind spd 5 8 10 13 13 11 10 10 10 10 11 10 10 9 8 6 6 6 6 8 9 8 Clouds B1 SC B2 B2 OV OV B2 B2 B2 B2 B2 B1 B1 B1 SC SC SC SC SC SC SC SC PoP 12hr 40 30 30 10 10 QPF 12hr 0.04 0.14 0.10 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C C C C C C C S S Obvis PF PF PF Heat index 85 85 Max heat 85 85 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 71 83 69 83 70 83 71 85 Temp 73 74 81 76 71 73 80 76 72 74 81 76 73 74 82 78 Dewpt 70 70 68 67 65 66 66 66 66 67 67 68 68 69 70 70 PWind dir NE N NE E S S S S Wind char GN GN GN GN LT GN GN GN Avg clouds SC SC SC SC FW FW FW FW FW SC SC SC SC SC SC B1 PoP 12hr 10 10 10 5 5 10 20 30 Rain shwrs S S C Tstms S $$ WVZ502-182000- Petersburg WV 38.99N 79.15W Elev. 963 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 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 82 63 81 64 85 Temp 67 67 73 79 79 72 67 65 64 63 72 78 79 73 67 65 64 66 76 82 81 74 Dewpt 67 65 68 68 67 67 66 64 63 63 67 68 68 68 67 65 64 65 69 70 70 71 RH 100 93 84 69 67 84 97 97 97100 84 71 69 84100100100 97 79 67 69 90 Wind dir N N N NE NE E E E E NE E E E E SE S S S SE E E E Wind spd 2 3 3 4 6 4 2 2 2 2 2 3 5 4 3 2 2 2 2 3 3 2 Clouds B2 OV B2 B1 B1 B1 B1 B2 B2 OV B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC PoP 12hr 20 20 30 20 50 QPF 12hr 0 0 0 0 0.10 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C S S S S C C C Tstms C C Obvis PF PF PF PF PF Heat index 86 85 Max heat 82 86 87 Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 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 83 61 86 62 86 62 84 Temp 66 65 80 73 64 63 82 75 65 65 83 74 65 64 81 71 Dewpt 66 65 68 67 63 62 66 67 63 64 69 68 64 63 64 63 PWind dir NE NE N E S S SW W Wind char LT LT LT LT LT LT LT LT Avg clouds B1 B1 B1 B1 SC SC SC SC SC SC SC B1 B1 SC B1 B1 PoP 12hr 30 40 10 20 10 40 30 40 Rain shwrs C C C S S C C S C C Tstms S S C S S $$ MDZ014-182000- Annapolis MD 38.99N 76.49W Elev. 7 ft 437 AM EDT Mon Aug 18 2025 Date Mon 08/18/25 Tue 08/19/25 Wed 08/20/25 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 75 69 75 70 81 Temp 75 74 73 73 72 72 71 71 70 70 72 74 74 73 72 71 71 72 75 79 79 77 Dewpt 71 70 68 68 67 67 68 68 67 66 66 67 66 66 68 67 67 68 69 69 69 69 RH 87 87 84 84 84 84 90 90 90 87 81 79 76 79 87 87 87 87 82 72 72 76 Wind dir N NE NE NE NE NE NE NE NE NE NE E E E E E E E E E E E Wind spd 4 11 12 11 11 10 10 8 9 9 10 10 10 9 8 5 5 5 6 8 9 6 Clouds B2 B2 OV OV OV OV OV OV OV OV B2 B2 B2 B1 B1 SC B1 B1 B1 SC SC SC PoP 12hr 20 20 20 10 20 QPF 12hr 0.10 0.08 0.05 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S S S S S S S S S Date Thu 08/21/25 Fri 08/22/25 Sat 08/23/25 Sun 08/24/25 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 71 81 69 81 70 81 71 82 Temp 74 73 80 78 72 71 79 77 73 72 80 77 74 73 81 77 Dewpt 70 69 68 66 66 65 64 64 67 67 66 66 68 68 68 67 PWind dir NE NE N E S S S S Wind char LT GN LT GN LT GN GN GN Avg clouds SC SC SC SC FW SC FW FW FW SC SC SC SC B1 B1 B1 PoP 12hr 10 10 10 5 5 10 30 40 Rain shwrs S C S C Tstms S $$