Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
969 FOUS51 KLWX 171438 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 1038 AM EDT Sat Aug 17 2024 VAZ054-172000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 1038 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 73 88 72 86 Temp 79 84 84 78 76 75 75 74 81 86 84 78 76 74 73 73 82 86 85 77 Dewpt 70 71 71 72 72 71 71 71 73 73 73 72 71 70 69 68 68 66 66 65 RH 74 65 65 82 87 87 87 90 77 65 70 82 85 87 87 84 63 51 53 67 Wind dir S S S SE S S S S S S S S SW W W NW W W W NW Wind spd 9 9 9 8 6 6 6 6 6 8 8 6 4 4 5 6 9 11 12 12 Clouds B1 B1 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 SC SC B1 B2 B2 PoP 12hr 50 60 90 40 60 QPF 12hr 0.34 0.13 0.88 0.20 0.08 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C L C S S C C D D C C S S L L S Tstms S C C C C S S S C L L C C S C C S Heat index 89 89 86 93 90 85 88 87 Max heat 89 91 93 92 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 Tstms S $$ MDZ013-172000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 1038 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 83 71 86 69 85 Temp 79 81 82 78 74 73 72 74 80 84 84 76 72 71 70 71 81 85 83 75 Dewpt 69 71 72 72 72 71 71 73 74 74 74 72 71 70 69 70 70 70 70 68 RH 72 72 72 82 93 93 97 97 82 72 72 87 97 97 97 97 69 61 65 79 Wind dir S S SE SE SE SE SE S S S S SE S SW W W W W W NW Wind spd 8 9 10 6 5 4 4 4 6 8 8 5 2 2 2 3 6 8 9 9 Clouds B2 B2 B2 B2 B2 B2 B2 OV B2 B2 B2 B2 B2 B1 B1 SC SC B1 B1 B2 PoP 12hr 60 60 90 50 60 QPF 12hr 0.39 0.15 0.92 0.34 0.08 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C L C C C C C D D C C S S L L S Tstms C C C C C C C C C D D C C S C C S Heat index 85 87 84 91 91 85 90 87 Max heat 85 88 91 93 90 90 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 64 77 59 78 60 81 61 83 Temp 67 65 74 71 63 61 76 72 62 62 79 74 64 64 82 75 Dewpt 62 59 57 56 53 54 54 55 56 58 56 59 59 60 59 61 PWind dir NW NW N N N NE NE SE Wind char GN GN LT LT LT LT LT LT Avg clouds B2 B1 SC SC FW FW FW FW FW FW FW SC FW FW FW FW PoP 12hr 20 10 5 0 5 0 0 0 Rain shwrs S S Tstms S S $$ MDZ011-172000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 1038 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 84 74 86 72 87 Temp 80 82 83 79 77 76 75 75 82 85 84 78 76 74 74 73 83 87 85 78 Dewpt 69 70 72 72 71 71 71 71 73 73 74 72 70 70 69 68 68 67 67 65 RH 69 67 70 79 82 85 87 87 74 67 72 82 82 87 84 84 61 52 55 64 Wind dir S SE SE SE SE SE SE S S S S S S SW W W W W W NW Wind spd 8 9 10 6 5 4 4 4 6 8 8 6 2 2 2 4 6 9 10 8 Clouds B2 B2 B2 B2 B2 B2 B2 OV B2 B2 B2 B2 B2 B1 B1 SC SC B1 B2 B2 PoP 12hr 60 60 90 50 60 QPF 12hr 0.40 0.16 1.04 0.36 0.10 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C L C C C C C D D C C S S L L C Tstms C C C C C C C C C D D C C S C C C Heat index 83 86 88 87 92 91 86 90 88 Max heat 87 89 83 92 93 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 S Tstms C S $$ WVZ052-172000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 1038 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 85 67 84 65 81 Temp 79 84 84 77 71 70 67 70 79 83 79 75 68 67 65 68 77 81 78 72 Dewpt 70 70 70 69 69 69 67 69 70 70 69 69 67 65 64 66 65 65 63 60 RH 74 63 63 76 93 97100 97 74 65 72 82 97 93 97 93 67 58 60 66 Wind dir S S SE SE SE SE SE SE S S SW S W W W W W W NW NW Wind spd 5 6 8 5 4 3 2 2 4 5 5 3 2 2 3 4 8 10 12 9 Clouds B2 B2 B2 B1 B1 B1 B2 B2 B1 B2 B1 B1 SC SC SC SC SC B1 B2 B2 PoP 12hr 50 30 90 20 60 QPF 12hr 0.20 0.04 0.56 0.08 0.12 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C S C S S C C D D S S C C L L C Tstms C C C S C S S S C L L S S S C C C Heat index 88 88 87 83 Max heat 88 88 87 86 83 83 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 59 76 51 75 51 78 54 81 Temp 62 62 73 71 56 56 73 68 54 56 75 71 56 58 78 74 Dewpt 57 56 53 51 50 50 49 50 51 51 52 54 54 55 55 57 PWind dir NW NW NW N NW NE E SE Wind char GN GN LT LT LT LT LT LT Avg clouds B2 B1 SC FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 30 5 0 0 0 0 0 5 Rain shwrs C S Tstms C $$ VAZ506-172000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 1038 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 79 85 83 78 73 72 72 72 80 87 83 77 72 70 68 70 81 84 80 73 Dewpt 71 72 72 72 72 71 71 71 74 72 72 71 71 70 68 68 70 69 69 67 RH 77 65 70 82 97 97 97 97 82 61 70 82 97100100 93 69 61 69 81 Wind dir S S S SE SE S S S S S SW SE S W NW NW NW W NW NW Wind spd 8 8 8 6 5 5 4 4 5 6 5 4 2 3 3 4 8 9 10 9 Clouds B2 B1 B2 B1 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 SC SC B1 B2 B2 PoP 12hr 50 50 90 40 70 QPF 12hr 0.32 0.08 0.55 0.10 0.13 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C C C S S C C D D C C S S L L S Tstms S C C C C S S S C L L C C S C C S Heat index 91 88 84 94 88 85 88 83 Max heat 91 91 94 92 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 20 5 0 0 0 0 0 0 Rain shwrs S S Tstms S S $$ VAZ037-172000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 1038 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 88 69 88 67 84 Temp 81 87 86 79 74 72 70 71 83 87 84 78 72 69 67 69 81 84 81 75 Dewpt 72 71 70 70 71 70 69 70 70 69 68 68 68 67 65 66 65 65 65 63 RH 74 59 59 74 90 93 97 97 65 55 59 71 87 93 93 90 58 53 58 66 Wind dir S S S SE SE S S S S SW SW NW NW W W W W W NW NW Wind spd 5 6 8 5 3 3 2 3 5 6 6 4 2 2 2 3 5 8 8 6 Clouds B1 B1 B1 B1 SC SC B1 B1 SC SC SC SC SC SC SC SC SC B1 B1 B1 PoP 12hr 40 30 70 20 70 QPF 12hr 0.19 0.03 0.24 0 0.14 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C C S S C L L S S C C L L S Tstms S C C C S C C C S S C L C S Heat index 85 93 91 87 91 87 83 86 83 Max heat 93 93 91 91 86 85 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 80 54 78 54 80 57 83 Temp 66 63 76 72 62 55 75 71 58 58 79 71 60 60 81 75 Dewpt 60 58 54 54 53 52 50 51 53 53 53 55 56 57 58 60 PWind dir NW N N N N NE N SE Wind char LT LT LT LT LT LT LT LT Avg clouds B1 SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 20 5 0 0 0 0 0 5 Rain shwrs S Tstms S $$ MDZ003-172000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 1038 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 79 83 84 77 71 70 69 71 79 83 82 76 70 68 66 68 78 81 80 71 Dewpt 70 71 71 71 69 69 69 70 72 71 70 70 69 67 66 67 69 69 68 64 RH 74 67 65 82 93 97100 97 79 67 67 82 97 97100 97 74 67 67 79 Wind dir S S S SE SE SE SE S S S SW S SW SW W W W W NW NW Wind spd 6 6 9 6 5 3 3 3 4 5 5 4 2 2 2 3 8 10 12 10 Clouds B2 B2 B2 B1 B1 B2 B2 B2 B1 B1 B2 B1 B1 B1 SC SC SC B1 B2 B2 PoP 12hr 60 30 90 30 70 QPF 12hr 0.17 0.08 0.54 0.16 0.18 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C C C L D D C C C C L L C Tstms C C C C C C C S C L L C S S C C C Heat index 88 89 88 86 84 83 Max heat 88 89 88 88 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 S Tstms C S $$ MDZ017-172000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 1038 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 85 74 87 71 87 Temp 81 84 84 79 76 75 74 77 82 85 85 78 74 72 71 74 81 86 85 76 Dewpt 69 71 72 72 71 71 71 72 74 75 74 72 71 71 70 70 70 70 70 70 RH 67 65 67 79 85 87 90 85 77 72 70 82 90 97 97 87 69 59 61 82 Wind dir S S S S S S S S S S S SW S SW W W NW W W W Wind spd 10 13 13 11 10 9 9 10 9 11 11 6 5 5 5 5 6 8 9 8 Clouds B1 B1 B1 B2 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 B1 SC B1 B1 B2 PoP 12hr 40 40 70 50 50 QPF 12hr 0.24 0.19 0.77 0.38 0.09 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C C S C L L C C C C S Tstms S C C C C C S C C L C C C C S Heat index 84 89 90 88 94 93 85 91 90 Max heat 89 91 94 95 91 92 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 67 79 62 78 63 81 65 83 Temp 69 69 77 74 66 65 76 73 65 67 79 75 67 69 81 76 Dewpt 65 61 60 58 57 56 56 56 58 59 57 58 60 60 59 62 PWind dir NW NW N N N NE E E Wind char GN GN LT GN LT LT LT LT Avg clouds B1 SC SC SC FW FW FW FW FW FW FW SC FW FW FW FW PoP 12hr 20 10 0 0 5 0 0 0 Rain shwrs S Tstms S $$ WVZ502-172000- Petersburg WV 38.99N 79.15W Elev. 963 ft 1038 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 90 65 86 63 80 Temp 82 89 90 81 72 68 66 68 81 83 84 76 69 65 63 66 77 79 79 72 Dewpt 68 64 61 66 66 65 64 65 66 66 65 65 65 64 63 64 65 63 61 60 RH 63 44 38 60 81 90 93 90 60 57 53 69 87 97100 93 67 58 54 66 Wind dir SW W W S S SW S SW SW W W W W W W W W NW NW NW Wind spd 4 5 5 4 2 3 2 2 4 5 5 4 2 2 2 2 6 9 11 9 Clouds B1 B1 B1 SC SC B1 B1 SC B1 B1 SC SC SC SC B1 B1 B1 B1 B2 B2 PoP 12hr 20 30 90 30 80 QPF 12hr 0.04 0.03 0.18 0.05 0.09 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S C S S C L D D C C S S L L D D C Tstms S S S S S S S C L C C S S C S C Heat index 85 90 90 83 83 85 86 Max heat 90 90 85 86 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 S Tstms C $$ MDZ014-172000- Annapolis MD 38.99N 76.49W Elev. 7 ft 1038 AM EDT Sat Aug 17 2024 Date Sat 08/17/24 Sun 08/18/24 Mon 08/19/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 82 73 84 71 82 Temp 78 80 81 78 75 74 74 74 80 83 82 76 73 72 72 73 79 81 82 77 Dewpt 69 72 71 72 73 72 72 73 75 75 74 73 72 71 70 70 70 69 68 68 RH 74 77 72 82 94 93 93 97 85 77 77 90 97 97 93 90 74 67 63 74 Wind dir S S S S S S S S S S S S S SW W W W W W NW Wind spd 11 12 12 10 9 8 8 8 9 11 11 8 4 4 3 5 8 10 11 10 Clouds B2 B2 B1 B2 B2 B1 B2 B2 B2 B1 B1 B2 B2 B1 B1 SC SC SC B1 B2 PoP 12hr 60 50 90 50 60 QPF 12hr 0.37 0.16 0.98 0.38 0.06 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C C C C C C C D D C C S S S S L L S Tstms S C C C C C C S C L D C C S S S C C S Heat index 84 85 85 90 88 84 85 Max heat 84 87 90 90 84 85 Date Tue 08/20/24 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 67 76 62 76 63 78 65 80 Temp 70 67 74 73 67 63 73 73 65 65 76 75 68 66 78 77 Dewpt 64 61 59 57 56 55 55 55 58 58 57 58 61 60 59 61 PWind dir NW NW N N N NE E E Wind char GN GN GN GN LT LT LT LT Avg clouds B2 B1 SC SC FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 20 10 5 0 5 0 0 0 Rain shwrs S S Tstms S S $$