Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
876 FOUS51 KLWX 171137 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 737 AM EDT Sat Aug 17 2024 VAZ054-172000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 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 74 88 72 86 Temp 73 78 83 85 79 76 76 76 74 81 87 86 79 77 74 73 73 82 86 85 77 Dewpt 66 70 71 72 71 72 71 71 71 72 72 72 71 71 70 68 68 68 66 66 65 RH 79 76 67 65 77 87 85 85 90 74 61 63 77 82 87 84 84 63 51 53 67 Wind dir S S S S SE S S S S S S S S SW W W W W W W NW Wind spd 9 10 10 10 9 8 8 8 8 8 9 9 6 4 4 5 5 8 10 10 10 Clouds B1 B1 B2 B2 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 SC B1 B2 B2 PoP 12hr 60 50 90 40 60 QPF 12hr 0.43 0.11 0.95 0.14 0.08 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L L L C C C C C C D D C C S S L L S Tstms S S C C C C C C S C L L C C S C C S Heat index 88 91 85 94 92 85 88 87 Max heat 88 92 94 95 88 88 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 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 79 62 79 61 81 64 84 Temp 71 67 76 74 67 62 76 73 65 63 79 75 67 65 81 77 Dewpt 62 58 55 54 53 51 51 53 54 54 53 55 58 58 57 59 PWind dir NW NW N N N NE NE E Wind char GN GN GN GN LT LT LT LT Avg clouds B2 B1 SC SC FW FW FW FW FW FW FW SC FW FW FW FW PoP 12hr 20 10 0 0 0 0 0 0 Rain shwrs S S Tstms S S $$ MDZ013-172000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 83 71 86 69 85 Temp 71 80 81 83 78 74 73 71 74 81 85 85 77 72 71 69 71 81 85 83 75 Dewpt 68 70 73 73 73 73 72 71 74 74 75 74 73 72 71 69 70 70 70 70 68 RH 90 72 77 72 85 97 97100100 79 72 70 87100100100 97 69 61 65 79 Wind dir S S S SE SE SE S SE S S S S S S W W W W W W NW Wind spd 6 9 10 10 8 5 5 5 5 6 8 8 4 2 2 2 3 5 6 8 8 Clouds B2 B2 B2 B2 B2 B2 B1 B2 B2 B2 B2 B2 B1 B1 B1 B1 SC SC B1 B2 B2 PoP 12hr 60 60 90 40 60 QPF 12hr 0.68 0.15 0.81 0.16 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L L L L L C C C C D D C C S S L L C Tstms S C C C C C C C C C L L C C S C C C Heat index 83 86 89 86 94 93 85 90 87 Max heat 86 90 94 95 90 90 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 77 59 78 60 81 61 83 Temp 67 65 74 71 63 61 76 72 62 62 79 74 64 64 82 75 Dewpt 62 59 57 56 53 54 54 55 56 58 56 59 59 60 59 61 PWind dir NW NW N N N NE NE SE Wind char GN GN LT LT LT LT LT LT Avg clouds B2 B1 SC SC FW FW FW FW FW FW FW SC FW FW FW FW PoP 12hr 30 10 5 0 5 0 0 0 Rain shwrs C C Tstms C S $$ MDZ011-172000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 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 75 87 73 87 Temp 73 83 83 85 80 78 78 77 75 83 86 86 79 78 75 75 74 83 87 85 78 Dewpt 66 69 71 71 71 71 71 71 71 72 72 73 71 70 70 69 68 68 67 67 65 RH 79 63 67 63 74 79 79 82 87 70 63 65 77 76 84 82 82 61 52 55 64 Wind dir S S SE SE SE SE SE SE S S S S SE S W W W W W W NW Wind spd 5 8 10 10 8 5 5 5 5 6 8 8 4 2 2 2 3 5 8 8 6 Clouds B2 B2 B2 B2 B2 B2 B2 B2 OV B2 B2 B1 B1 B1 B1 B1 SC B1 B1 B2 B2 PoP 12hr 60 60 90 50 60 QPF 12hr 0.69 0.17 0.98 0.16 0.10 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L L L L L C C C C D D C C S S L L C Tstms S C C C C C C C C C L L C C S C C C Heat index 87 88 90 83 88 92 93 86 90 88 Max heat 90 90 86 92 94 90 90 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 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 79 63 80 63 82 65 85 Temp 72 67 76 74 67 64 77 75 67 63 80 77 69 65 82 79 Dewpt 62 57 55 54 53 52 51 53 55 55 53 55 58 57 56 59 PWind dir NW NW N N N NE NE SE Wind char GN GN LT LT LT LT LT LT Avg clouds B2 B1 SC SC FW FW FW FW FW FW FW SC FW FW FW FW PoP 12hr 30 10 5 0 5 0 0 0 Rain shwrs C C Tstms C S $$ WVZ052-172000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 85 66 83 64 81 Temp 72 80 85 85 78 70 69 67 70 79 83 80 76 68 65 64 67 77 81 78 72 Dewpt 67 69 70 69 69 69 69 67 69 69 69 68 68 67 65 64 65 65 65 63 60 RH 84 69 61 59 74 97100100 97 72 63 67 76 97100100 93 67 58 60 66 Wind dir S S S SE SE SE S S SE S S SW W W W W W W W NW NW Wind spd 5 6 6 8 5 4 3 2 2 4 5 5 2 2 2 2 3 6 9 10 8 Clouds B1 B2 OV B2 SC B1 B1 B2 B2 B1 B1 B1 SC SC SC SC SC SC B2 B2 B2 PoP 12hr 60 50 90 20 60 QPF 12hr 0.35 0.03 0.45 0.01 0.14 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L L C C C C C C D D S S C C L L C Tstms S C C C C C C C S C L C S S S C C C Heat index 83 90 89 87 83 83 Max heat 90 90 87 87 83 83 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 59 76 51 75 51 78 54 81 Temp 62 62 73 71 56 56 73 68 54 56 75 71 56 58 78 74 Dewpt 57 56 53 51 50 50 49 50 51 51 52 54 54 55 55 57 PWind dir NW NW NW N NW NE E SE Wind char GN GN LT LT LT LT LT LT Avg clouds B2 B1 SC FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 30 5 0 0 0 0 0 5 Rain shwrs C C Tstms C S $$ VAZ506-172000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 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 71 88 68 84 Temp 73 79 85 83 78 74 72 72 72 81 88 85 78 73 71 68 70 81 84 80 73 Dewpt 69 72 74 74 73 73 72 72 72 74 73 73 72 71 70 68 69 70 69 69 67 RH 87 79 70 74 85 97100100100 79 61 67 82 93 97100 97 69 61 69 81 Wind dir S S S S SE S S S S S S SW S S W NW NW W W NW NW Wind spd 8 8 8 8 6 5 5 4 4 5 6 5 3 2 2 3 3 6 8 8 6 Clouds B1 B1 B2 B1 B1 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 SC SC SC B2 B2 B2 PoP 12hr 60 50 90 30 70 QPF 12hr 0.50 0.08 0.46 0.06 0.15 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L L C C C C C C D D C C S S L L C Tstms S C C C C C C C S C L L C C S C C C Heat index 93 90 86 96 92 85 88 83 Max heat 93 94 96 96 88 87 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 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 77 56 78 56 81 59 84 Temp 67 63 75 72 61 59 75 71 58 59 79 74 61 61 82 77 Dewpt 62 59 56 55 52 52 53 55 54 56 56 58 58 59 59 61 PWind dir NW NW N N N NE NE SE Wind char GN GN LT LT LT LT LT LT Avg clouds B2 B1 SC FW FW FW FW FW FW FW FW SC FW FW FW FW PoP 12hr 30 5 0 0 0 0 0 0 Rain shwrs C C Tstms C S $$ VAZ037-172000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 69 88 66 84 Temp 71 81 88 87 80 74 73 70 70 83 88 85 79 72 69 67 68 81 84 81 75 Dewpt 69 71 70 69 69 71 70 70 70 69 67 67 67 68 67 65 66 65 65 65 63 RH 93 72 55 55 69 90 90100100 63 50 55 67 87 93 93 93 58 53 58 66 Wind dir S S S S SE S S S S S SW SW W W W W W W W NW NW Wind spd 5 5 6 8 5 3 3 3 3 5 6 6 4 2 2 2 2 4 6 6 5 Clouds B1 B1 B1 B1 SC SC SC B1 B1 SC SC B1 SC SC SC SC SC B1 B2 B2 B2 PoP 12hr 40 30 70 20 70 QPF 12hr 0.13 0.02 0.35 0.01 0.15 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C S S C C L L S S C C L L S Tstms S S C C S S S S C C S S C C S Heat index 85 93 91 83 87 91 88 83 86 83 Max heat 93 94 91 91 86 85 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 80 54 78 54 80 57 83 Temp 66 63 76 72 62 55 75 71 58 58 79 71 60 60 81 75 Dewpt 60 58 54 54 53 52 50 51 53 53 53 55 56 57 58 60 PWind dir NW N N N N NE N SE Wind char LT LT LT LT LT LT LT LT Avg clouds B1 SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 20 5 0 0 0 0 0 5 Rain shwrs S S Tstms S S $$ MDZ003-172000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 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 69 84 66 81 Temp 71 79 84 85 78 70 69 69 71 80 84 83 77 70 67 66 69 78 81 80 71 Dewpt 68 72 73 73 72 70 69 69 71 73 72 71 71 69 67 66 67 69 69 68 64 RH 90 79 70 67 82100100100100 79 67 67 82 97100100 93 74 67 67 79 Wind dir S S S S SE SE SE S S S S SW SW SW W W W W W NW NW Wind spd 8 6 6 9 6 5 3 3 3 4 6 5 3 2 2 2 3 6 9 10 8 Clouds B2 B2 OV B2 B1 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 SC B1 B1 B2 B2 OV PoP 12hr 70 50 90 30 70 QPF 12hr 0.34 0.06 0.42 0.01 0.20 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L L C C C C L L D D C C C C L L C Tstms C C C L C C C C S C L C C S S C C C Heat index 90 92 84 90 88 84 83 Max heat 90 92 90 90 84 84 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 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 59 75 52 75 53 79 56 81 Temp 64 60 72 69 56 56 73 68 56 57 76 71 58 59 78 74 Dewpt 59 56 56 53 50 51 53 53 53 53 56 57 56 57 59 60 PWind dir NW N N N N NE E SE Wind char GN GN LT LT LT LT LT LT Avg clouds B2 B1 SC FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 30 10 5 0 5 0 0 0 Rain shwrs C C Tstms C S $$ MDZ017-172000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 85 73 87 70 87 Temp 75 80 83 84 78 75 74 74 77 83 86 86 79 73 71 70 74 81 86 85 76 Dewpt 67 69 71 72 72 71 71 71 72 74 75 74 73 71 71 70 70 70 70 70 70 RH 76 69 67 67 82 87 90 90 85 74 70 68 82 93100100 87 69 59 61 82 Wind dir S S S S S S S S S S S S S S SW W W W W W NW Wind spd 10 11 14 13 11 11 10 10 10 10 11 11 8 5 5 5 5 5 6 6 6 Clouds B2 B1 B2 B2 B2 B1 B1 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC SC B2 B2 PoP 12hr 60 50 70 40 50 QPF 12hr 0.26 0.28 0.68 0.22 0.08 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L L C C C C C C L L C C C C S Tstms C C C C C C C C C L C C C C S Heat index 83 88 90 90 95 94 85 91 90 Max heat 88 91 95 96 91 92 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 67 79 62 78 63 81 65 83 Temp 69 69 77 74 66 65 76 73 65 67 79 75 67 69 81 76 Dewpt 65 61 60 58 57 56 56 56 58 59 57 58 60 60 59 62 PWind dir NW NW N N N NE E E Wind char GN GN LT GN LT LT LT LT Avg clouds B1 B1 SC SC FW FW FW FW FW FW FW SC FW FW FW FW PoP 12hr 20 10 0 0 5 0 0 0 Rain shwrs S S Tstms S S $$ WVZ502-172000- Petersburg WV 38.99N 79.15W Elev. 963 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 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 65 86 62 80 Temp 71 83 89 92 82 72 68 66 68 82 84 86 77 69 64 62 66 77 79 79 72 Dewpt 69 69 65 63 65 66 65 63 65 66 66 65 65 65 64 62 64 65 63 61 60 RH 93 63 45 38 56 81 90 90 90 58 55 50 67 87100100 93 67 58 54 66 Wind dir S SW W W S S SW S SW SW W W W W W W W W NW NW NW Wind spd 3 4 5 5 4 3 3 2 2 4 5 5 3 2 2 2 2 5 8 9 8 Clouds SC B1 B1 SC SC B1 B1 B1 B1 B1 B1 SC SC SC SC SC B1 B1 B1 B2 B2 PoP 12hr 40 40 90 30 80 QPF 12hr 0.01 0.01 0.18 0.01 0.09 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C C C L L D D C C S S L L D D C Tstms S S C C C C C C C C C C S S S S C C C Obvis PF Heat index 87 91 93 84 84 86 88 Max heat 91 93 86 88 81 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 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 55 78 49 79 50 82 53 86 Temp 59 58 74 71 54 52 76 70 53 53 80 73 56 56 83 76 Dewpt 57 54 51 49 49 48 48 50 50 50 52 54 53 53 56 58 PWind dir NW NW NW N W SE S SE Wind char LT LT LT LT LT LT LT LT Avg clouds B2 B1 SC FW FW FW CL FW FW FW FW FW FW FW FW FW PoP 12hr 30 10 0 0 0 0 0 5 Rain shwrs C C Tstms C S $$ MDZ014-172000- Annapolis MD 38.99N 76.49W Elev. 7 ft 737 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 81 73 83 71 82 Temp 73 77 79 81 77 75 73 73 73 79 82 82 76 73 72 72 72 79 81 82 77 Dewpt 67 69 72 71 72 73 73 73 73 74 75 73 73 73 71 70 70 70 69 68 68 RH 81 76 79 72 85 94100100100 85 79 74 90100 97 93 93 74 67 63 74 Wind dir S S S S S S S S S S S S S S W W W W W W NW Wind spd 9 12 13 13 11 9 9 9 8 10 12 11 6 3 3 3 4 6 9 10 9 Clouds B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 SC SC B2 B2 PoP 12hr 60 60 90 50 60 QPF 12hr 0.56 0.24 0.94 0.25 0.06 Snow 12hr 00-00 00-00 00-00 Rain shwrs L L L L L L C C C C D D C C S S L L C Tstms S C C C C C C C C L L C C S C C C Heat index 85 89 87 84 85 Max heat 85 89 90 84 85 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 67 76 62 76 63 78 65 80 Temp 70 67 74 73 67 63 73 73 65 65 76 75 68 66 78 77 Dewpt 64 61 59 57 56 55 55 55 58 58 57 58 61 60 59 61 PWind dir NW NW N N N NE E E Wind char GN GN GN GN LT LT LT LT Avg clouds B2 B1 SC SC FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 30 10 5 0 5 0 0 0 Rain shwrs C C Tstms C S $$