Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
606 FOUS51 KLWX 180539 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 138 AM EDT Sun Aug 18 2024 VAZ054-182000- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 72 86 66 78 Temp 74 75 81 85 83 78 75 74 74 73 79 82 81 75 72 69 67 67 73 76 78 73 Dewpt 72 72 73 72 72 71 71 70 69 68 67 67 66 64 63 60 58 56 55 53 52 50 RH 93 90 77 65 70 79 87 87 84 84 67 61 60 69 73 73 73 68 53 45 40 44 Wind dir S S S S W N SW W W NW NW W W NW NW NW NW NW NW NW N N Wind spd 9 9 9 10 9 5 3 4 5 6 9 10 11 12 12 12 12 12 13 13 12 10 Clouds B1 B2 B2 SC B2 B1 B1 B1 SC FW SC B1 B1 B2 B1 B1 B1 SC SC FW FW FW PoP 12hr 80 40 70 10 5 QPF 12hr 0.63 0.11 0.03 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C L C L L Tstms S C L C C C Heat index 86 91 88 85 83 Max heat 91 90 85 85 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 60 78 61 82 63 85 67 89 Temp 65 61 75 73 64 63 80 76 66 65 83 79 70 68 86 83 Dewpt 50 50 49 50 52 52 51 53 56 57 56 57 60 60 60 62 PWind dir N N NW NW S S S SW Wind char GN GN LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ013-182000- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 86 69 85 63 76 Temp 72 73 79 84 81 74 72 71 69 71 79 82 80 73 68 66 64 64 70 74 75 70 Dewpt 72 73 75 75 74 72 72 70 69 70 70 70 70 67 64 61 58 58 56 55 55 53 RH 100100 88 74 79 93100 97100 97 74 67 72 81 87 84 81 81 61 51 50 55 Wind dir S S S SE SE SE W W W W NW W W NW NW NW NW NW NW NW N N Wind spd 5 5 6 8 6 3 2 2 2 4 5 6 9 8 8 9 10 10 11 11 11 6 Clouds B2 B2 B2 B1 B2 B1 B1 B1 B1 FW SC B1 B1 B1 B1 B1 B1 SC SC SC FW FW PoP 12hr 90 40 60 20 10 QPF 12hr 1.02 0.07 0.04 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S L D C L L S S Tstms C S L L C C C S Heat index 92 86 86 83 Max heat 92 90 86 86 Coast Flood Y Y Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 57 77 59 81 61 84 64 88 Temp 59 59 75 71 61 62 79 74 63 64 82 77 66 66 86 80 Dewpt 51 52 51 53 54 55 53 56 57 59 58 61 60 62 62 64 PWind dir N N NW NE SW S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW SC FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ011-182000- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 87 72 86 66 78 Temp 75 75 81 85 82 78 76 75 74 72 82 83 82 76 73 69 68 67 73 76 78 73 Dewpt 72 72 73 72 72 70 70 70 68 68 67 67 66 64 63 60 57 55 54 53 51 50 RH 90 90 77 65 72 76 82 84 82 87 61 59 58 66 71 73 68 65 51 45 39 44 Wind dir SE S S SE SE S W W W NW NW W W NW NW NW NW NW NW N N N Wind spd 5 5 6 9 6 2 2 2 2 3 5 8 10 8 9 9 10 10 11 11 11 6 Clouds B2 B2 B2 B1 B2 B1 B1 B1 B1 SC SC B1 B1 B1 B2 B1 B1 SC SC SC FW FW PoP 12hr 90 50 60 20 10 QPF 12hr 1.26 0.14 0.04 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S C D C L L S S Tstms C S S C L C C C S Heat index 86 91 87 85 86 84 Max heat 91 92 86 86 Coast Flood Y Y Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 63 83 65 86 67 90 Temp 64 61 77 75 66 63 80 77 68 65 83 80 71 68 86 83 Dewpt 50 50 49 50 52 51 50 53 56 56 56 58 60 60 60 62 PWind dir N N NW NE SW S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW CL FW FW FW FW FW FW CL CL FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ WVZ052-182000- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 84 64 80 58 75 Temp 67 70 77 81 79 75 69 66 65 69 74 77 76 71 65 62 60 62 68 72 74 68 Dewpt 67 69 68 68 67 68 68 66 64 65 65 64 62 59 58 56 54 53 52 50 48 48 RH 100 97 74 65 67 79 97100 97 87 74 64 62 66 78 81 81 72 57 46 40 49 Wind dir SE S SE SE SW W SW W W W NW NW NW NW NW NW NW NW NW N N N Wind spd 2 2 3 5 4 2 1 2 2 4 9 10 12 10 9 9 10 10 11 11 11 5 Clouds B1 B1 FW B2 B1 SC SC FW FW FW SC B1 B1 B2 B1 B1 B1 SC FW FW FW FW PoP 12hr 80 20 60 10 5 QPF 12hr 0.59 0 0.04 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S D C S S S C C Tstms S L C S S C C Heat index 84 Max heat 84 83 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 50 75 50 79 53 83 57 86 Temp 54 56 72 68 55 56 76 72 56 59 80 76 59 62 84 78 Dewpt 48 49 47 48 50 51 50 52 53 54 56 57 58 58 58 60 PWind dir N N NW NE SE SE S W Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ VAZ506-182000- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 67 83 63 76 Temp 72 73 81 85 82 76 72 71 69 70 79 81 79 73 68 66 64 64 70 74 76 70 Dewpt 72 73 74 73 73 72 72 70 68 69 70 69 68 66 64 60 58 58 57 55 53 52 RH 100100 79 67 74 87100 97 97 97 74 67 69 79 87 81 81 81 63 51 45 53 Wind dir S S S S W N S W NW NW NW W NW NW NW NW NW NW NW NW N N Wind spd 4 5 5 5 4 2 2 2 3 4 6 8 9 10 10 10 10 10 11 10 9 5 Clouds B2 B1 SC SC OV B1 B1 SC SC FW SC B1 B1 B2 B1 B1 B1 SC SC FW FW FW PoP 12hr 90 30 70 10 5 QPF 12hr 0.40 0 0.05 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C D S L L Tstms C L S C C Heat index 86 92 87 84 Max heat 92 92 84 84 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 77 55 81 58 85 62 89 Temp 58 57 75 71 58 59 79 74 60 61 82 77 64 64 86 81 Dewpt 50 52 51 53 53 53 54 56 56 57 59 61 60 61 62 63 PWind dir N N NW N S S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL FW CL FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ VAZ037-182000- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 89 66 83 60 79 Temp 69 70 81 86 83 76 72 69 67 69 78 80 77 72 68 65 62 62 71 76 78 72 Dewpt 69 70 69 68 68 68 68 68 66 66 66 66 65 62 62 60 57 57 54 52 50 51 RH 100100 67 55 61 76 87 97 97 90 67 62 67 71 81 84 84 84 55 43 37 48 Wind dir SW S SW S W N N W W W NW NW NW NW NW NW NW NW N N N N Wind spd 2 2 5 6 5 2 2 2 2 2 4 5 6 6 5 5 6 6 8 8 8 5 Clouds B1 B1 FW SC B1 SC SC FW FW SC SC B2 B2 B1 SC SC SC SC FW FW FW FW PoP 12hr 70 20 60 5 0 QPF 12hr 0.21 0 0.35 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C L S C C L L Tstms C C S C L C Heat index 84 89 86 82 Max heat 89 89 82 82 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 53 77 54 81 57 83 60 88 Temp 58 56 75 70 57 57 79 73 60 59 82 74 63 62 86 77 Dewpt 50 50 48 50 51 52 52 54 56 56 57 59 60 59 60 62 PWind dir N N N SE SW S SW S Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW CL FW CL CL FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ003-182000- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 81 60 75 Temp 70 71 78 81 80 76 70 68 66 69 75 77 77 70 65 63 61 62 68 71 74 68 Dewpt 70 71 72 72 71 71 70 68 66 67 68 67 66 62 59 57 55 55 54 53 51 50 RH 100100 82 74 74 85100100100 93 79 71 69 76 81 81 81 78 61 53 44 52 Wind dir S S S SW SW E SW SW W W NW NW NW NW NW NW NW NW N N N N Wind spd 3 3 3 5 4 2 2 2 2 3 6 10 11 10 9 8 9 10 10 10 10 5 Wind gust 19 Clouds B2 B1 SC B2 B1 B1 SC FW FW FW SC B1 B1 B2 B1 B1 SC SC FW FW FW SC PoP 12hr 90 20 60 10 5 QPF 12hr 0.20 0 0.06 0.01 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C D C S S S L L S S Tstms S C L C S S C C S Heat index 85 83 Max heat 85 85 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 52 75 53 79 55 83 59 88 Temp 55 55 73 68 55 57 77 72 57 59 80 75 61 62 84 79 Dewpt 49 50 51 52 51 52 54 55 54 56 59 60 58 59 62 63 PWind dir N N N N SE S S SW Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW CL FW CL FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ017-182000- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 87 71 86 66 79 Temp 74 76 81 84 83 78 73 72 72 74 80 83 81 74 70 69 66 68 73 76 78 74 Dewpt 72 73 75 75 75 73 71 70 70 71 71 70 70 69 66 63 61 61 60 58 57 56 RH 93 90 82 74 77 85 93 93 93 90 74 65 69 84 87 81 84 78 64 54 48 53 Wind dir S S S S SE W SW W W NW NW W W NW NW NW NW NW NW N N N Wind spd 9 9 10 11 10 6 5 4 4 5 5 6 8 8 10 10 12 11 13 12 11 8 Clouds SC B1 SC SC B1 B1 B1 SC B1 SC FW B1 B1 B1 B1 B1 B1 SC SC SC FW FW PoP 12hr 60 50 60 20 5 QPF 12hr 0.58 0.58 0.07 0.03 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C C C C L L S S Tstms S C C C C C C S S Heat index 87 92 90 83 87 85 Max heat 92 94 87 87 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 78 62 81 64 83 67 86 Temp 64 64 76 73 64 66 79 74 66 68 81 76 69 70 84 79 Dewpt 53 54 53 54 55 57 55 56 59 60 59 60 62 63 63 64 PWind dir N N N NE S S S S Wind char GN GN LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ WVZ502-182000- Petersburg WV 38.99N 79.15W Elev. 963 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 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 87 62 80 55 77 Temp 65 68 80 83 85 76 69 65 63 65 74 77 77 70 64 61 57 57 68 74 77 69 Dewpt 63 64 66 65 64 64 65 64 63 64 65 62 60 59 58 55 54 53 52 49 47 48 RH 93 87 62 55 50 66 87 97100 97 74 60 56 68 81 81 90 86 57 41 35 47 Wind dir S S W W W W SW SW SW W NW NW NW NW NW NW NW NW NW NW NW NW Wind spd 2 2 3 5 5 3 2 2 2 2 5 9 10 9 6 4 4 5 6 9 9 5 Wind gust 19 Clouds SC FW B1 B2 SC SC FW FW FW B1 B1 B1 B1 B1 B1 B1 B1 SC FW FW CL FW PoP 12hr 80 20 60 10 5 QPF 12hr 0.05 0 0.04 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S L D C S S L L L L Tstms C C C S S S S C C Heat index 82 85 86 Max heat 85 87 Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 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 48 78 49 83 53 88 57 92 Temp 52 51 75 69 52 53 80 73 56 57 85 77 60 59 89 80 Dewpt 48 47 46 47 47 48 49 52 52 53 54 57 55 55 57 60 PWind dir NW N W SE S S SW W Wind char LT LT LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW CL CL CL CL CL FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$ MDZ014-182000- Annapolis MD 38.99N 76.49W Elev. 7 ft 138 AM EDT Sun Aug 18 2024 Date Sun 08/18/24 Mon 08/19/24 Tue 08/20/24 EDT 3hrly 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 UTC 3hrly 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 Max/Min 83 71 82 66 76 Temp 75 75 79 81 80 76 73 72 72 72 78 81 79 75 70 69 67 67 71 74 75 72 Dewpt 73 73 74 75 73 72 73 71 70 70 70 69 68 66 66 63 60 58 57 56 54 54 RH 94 94 85 82 79 87100 97 93 93 76 67 69 74 87 81 78 73 61 53 48 53 Wind dir S S S S S SE SW W W NW W W W NW NW NW NW NW NW N N N Wind spd 8 9 11 12 10 5 2 2 3 5 6 9 10 10 10 10 11 11 13 13 12 10 Clouds B1 B2 B1 SC B1 B1 B2 SC B1 FW SC B1 B1 B1 B1 B1 B1 SC SC FW FW FW PoP 12hr 90 50 60 20 10 QPF 12hr 0.87 0.18 0.04 0 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C L C L L S S Tstms S S C L C C C S Heat index 87 84 84 Max heat 87 86 84 84 Coast Flood Y Y Date Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Min/Max 61 75 63 78 64 81 67 84 Temp 65 61 73 73 65 65 76 74 66 66 79 77 69 69 82 79 Dewpt 53 53 52 54 56 56 54 56 59 59 59 61 62 62 63 64 PWind dir N N N NE S S S S Wind char GN GN LT LT LT LT LT LT Avg clouds FW FW FW FW FW FW CL CL CL FW CL FW FW FW FW FW PoP 12hr 0 0 0 0 0 0 0 0 $$