Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
240 FOUS51 KLWX 180238 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 1038 PM EDT Sat Aug 17 2024 VAZ054-180800- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 74 88 71 85 66 Temp 75 75 74 76 81 86 84 77 75 74 73 72 81 84 82 76 72 70 68 66 Dewpt 72 72 72 72 73 72 72 71 71 70 69 68 68 66 67 64 63 61 59 58 RH 90 90 93 87 77 63 67 82 87 87 87 87 65 55 61 66 73 73 73 75 Wind dir S S S S S S W N SW W W NW NW W W NW NW NW NW NW Wind spd 9 8 9 9 9 10 9 5 3 4 5 6 9 10 11 12 12 12 12 12 Clouds B1 SC B1 B2 B2 SC SC B1 SC SC SC SC SC SC B1 B2 B1 B2 B1 SC PoP 12hr 20 80 40 60 10 QPF 12hr 0.10 0.63 0.11 0.03 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 92 90 84 86 85 Max heat 92 94 87 86 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 79 61 78 62 81 64 84 65 87 Temp 76 73 64 63 76 72 64 64 79 75 66 66 82 77 67 68 84 79 Dewpt 55 52 51 50 49 50 53 53 51 54 57 56 55 57 60 59 58 59 PWind dir NW N N N NE SE E S S Wind char GN GN GN LT LT LT LT LT LT Avg clouds SC SC FW FW FW SC FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ MDZ013-180800- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 72 85 68 84 64 Temp 72 72 72 73 80 85 81 74 72 71 69 70 80 84 81 73 69 66 65 64 Dewpt 71 72 72 73 75 75 75 72 71 71 69 70 70 70 70 68 65 61 58 59 RH 97100100100 85 72 82 93 97100100100 72 63 69 84 87 84 78 84 Wind dir S S S S S SE SE SE W W W W NW W W NW NW NW NW NW Wind spd 5 4 5 5 6 8 6 3 2 2 2 4 5 6 9 8 8 9 10 10 Clouds B1 SC B2 B2 B2 B1 B1 B1 B1 B1 B1 SC SC SC B1 B1 B2 B1 B2 SC PoP 12hr 30 90 40 60 20 QPF 12hr 0.04 1.02 0.07 0.04 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C S L D C L L S S Tstms S C S L L C C C S Heat index 85 94 87 83 88 85 Max heat 94 90 88 88 Coast Flood Y Y Y Y Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 77 58 77 60 80 60 83 62 85 Temp 74 71 60 60 75 71 62 62 78 73 63 63 81 76 65 66 83 78 Dewpt 57 55 52 53 52 54 55 56 54 57 58 58 57 59 60 61 60 62 PWind dir NW N N N NE SE E S S Wind char GN LT LT LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 10 0 0 0 0 0 0 0 5 $$ MDZ011-180800- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 71 87 72 86 67 Temp 72 74 75 75 81 85 83 77 76 74 74 72 82 85 84 76 73 70 69 67 Dewpt 71 72 72 72 73 72 72 70 70 70 68 67 67 67 67 65 63 61 58 57 RH 97 93 90 90 77 65 70 79 82 87 82 84 61 55 57 69 71 73 68 70 Wind dir SE S SE S S SE SE S W W W NW NW W W NW NW NW NW NW Wind spd 5 4 5 5 6 9 6 2 2 2 2 3 5 8 10 8 9 9 10 10 Clouds B1 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 SC SC B1 B1 B1 B2 B1 B2 SC PoP 12hr 30 90 50 60 20 QPF 12hr 0.02 1.26 0.14 0.04 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 88 85 88 87 Max heat 92 93 88 88 Coast Flood Y Y Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 79 62 79 64 83 66 85 68 87 Temp 76 73 65 64 77 73 66 66 81 76 68 68 83 78 70 70 85 79 Dewpt 55 52 51 51 49 51 53 52 51 54 57 56 55 57 60 59 58 60 PWind dir NW N N N NE SE E S S Wind char GN LT LT LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 10 5 0 0 0 0 0 0 5 $$ WVZ052-180800- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 66 85 64 80 59 Temp 70 68 67 69 77 81 80 75 69 66 65 68 76 79 77 71 65 62 59 61 Dewpt 66 67 67 69 68 68 68 68 67 66 64 65 64 64 62 59 58 56 54 56 RH 87 97100100 74 65 67 79 93100 97 90 66 60 60 66 78 81 83 84 Wind dir SE S SE S SE SE SW W SW W W W NW NW NW NW NW NW NW NW Wind spd 5 2 2 2 3 5 4 2 1 2 2 4 9 10 12 10 9 9 10 10 Clouds SC B1 B1 B1 FW B1 B1 SC SC FW FW FW SC B1 B1 B1 B2 B1 B1 SC PoP 12hr 20 80 20 50 10 QPF 12hr 0 0.59 0 0.04 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S D C S S S C C Tstms S S L C S S C C Heat index 84 83 Max heat 84 86 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 76 51 75 50 78 53 81 56 84 Temp 73 70 55 55 71 68 55 55 75 71 56 57 79 74 59 60 81 77 Dewpt 53 49 48 48 48 49 51 51 51 53 53 53 54 56 56 56 57 59 PWind dir NW N N NW NE E SE S S Wind char GN LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW CL FW FW FW CL FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ VAZ506-180800- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 71 87 67 83 63 Temp 73 72 72 73 81 85 83 76 72 70 69 69 80 83 80 73 69 66 64 63 Dewpt 71 72 72 73 75 73 73 72 72 70 68 69 69 69 68 66 64 61 58 59 RH 93100100100 82 67 72 87100100 97100 69 63 67 79 84 84 81 87 Wind dir SE S S S S S W N S W NW NW NW W NW NW NW NW NW NW Wind spd 5 4 4 5 5 5 4 2 2 2 3 4 6 8 9 10 10 10 10 10 Clouds SC B1 B2 B1 SC SC B1 B1 SC SC SC FW SC B1 B1 B1 B1 B2 B1 SC PoP 12hr 20 90 30 70 10 QPF 12hr 0.01 0.40 0 0.05 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S C D S L L Tstms S C L S C C Heat index 87 92 89 83 87 83 Max heat 93 93 87 87 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 77 55 77 55 81 57 83 60 87 Temp 75 71 60 58 75 71 58 59 79 74 60 61 81 76 62 63 84 79 Dewpt 56 54 51 52 52 53 53 54 55 57 57 58 57 59 59 60 61 62 PWind dir NW N N N NE S SE S S Wind char GN LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ VAZ037-180800- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 69 89 65 83 61 Temp 72 71 69 71 83 88 83 76 72 69 67 67 79 82 79 73 68 64 61 63 Dewpt 71 70 69 70 69 68 68 68 69 67 66 66 66 65 64 62 61 59 57 58 RH 97 97100 97 63 52 61 76 90 93 97 97 64 56 60 68 78 84 87 84 Wind dir E S SW S SW S W N N W W W NW NW NW NW NW NW NW NW Wind spd 4 3 2 2 5 6 5 2 2 2 2 2 4 5 6 6 5 5 6 6 Clouds FW SC B1 SC FW SC SC SC FW FW FW SC SC SC B1 B1 SC SC SC SC PoP 12hr 10 70 20 70 5 QPF 12hr 0 0.21 0 0.35 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C L S C C L L Tstms C C S C L C Heat index 87 92 86 84 Max heat 92 89 84 84 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 80 54 77 54 80 56 82 59 85 Temp 76 72 59 58 75 69 58 58 78 73 59 60 81 72 61 62 84 74 Dewpt 54 52 52 51 49 50 52 52 51 54 55 56 55 57 58 58 59 60 PWind dir N N N N NE N E SW S Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ MDZ003-180800- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 69 84 66 81 60 Temp 73 72 70 71 78 82 81 75 70 68 66 68 77 80 78 70 65 63 61 60 Dewpt 68 70 70 71 72 72 71 70 69 68 66 67 68 67 66 63 60 58 55 56 RH 84 93100100 82 72 72 84 97100100 97 74 65 67 78 84 84 81 87 Wind dir SE S S S S SW SW E SW SW W W NW NW NW NW NW NW NW NW Wind spd 4 3 3 3 3 5 4 2 2 2 2 3 6 10 11 10 9 8 9 10 Wind gust 19 Clouds SC B2 B2 B1 SC SC SC SC SC FW FW SC SC B1 B1 B2 B2 B2 B1 SC PoP 12hr 40 90 20 60 20 QPF 12hr 0 0.20 0 0.06 0.01 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S C D C S S S L L S S Tstms C S C L C S S C C S Heat index 87 85 82 Max heat 87 88 82 82 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 75 52 75 53 78 55 81 58 85 Temp 72 68 55 56 72 68 56 57 76 71 57 58 79 74 60 61 82 77 Dewpt 56 52 49 51 51 53 52 53 55 56 54 56 58 59 57 58 61 62 PWind dir N N N N NE E SE SE S Wind char GN LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW CL CL FW CL CL FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ MDZ017-180800- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 73 87 70 85 66 Temp 75 74 74 75 81 85 84 78 73 71 71 73 81 84 82 75 71 68 66 68 Dewpt 71 72 72 73 75 75 75 73 71 70 70 70 71 70 69 68 66 63 61 61 RH 87 93 93 94 82 72 74 85 93 97 97 90 72 63 65 79 84 84 84 78 Wind dir S S S S S S SE W SW W W NW NW W W NW NW NW NW NW Wind spd 10 9 9 9 10 11 10 6 5 4 4 5 5 6 8 8 10 10 12 11 Clouds B1 SC SC B1 SC B1 SC B1 B1 SC B1 SC FW SC B1 B1 B1 B1 B1 SC PoP 12hr 40 60 50 60 20 QPF 12hr 0.35 0.58 0.58 0.07 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S C C C C L L S S Tstms C S S C C C C C C S S Heat index 87 94 92 85 88 85 Max heat 94 95 88 88 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 79 62 77 63 81 64 83 66 84 Temp 77 73 65 64 75 72 65 67 79 74 66 68 81 76 68 69 82 77 Dewpt 60 57 56 56 54 55 56 58 56 57 58 60 58 59 61 62 60 61 PWind dir NW N N N NE E E E E Wind char GN GN GN LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 10 0 0 0 0 0 0 0 5 $$ WVZ502-180800- Petersburg WV 38.99N 79.15W Elev. 963 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 65 87 62 80 56 Temp 71 67 65 67 80 84 86 79 69 65 63 64 75 78 79 72 64 59 56 58 Dewpt 67 65 63 64 67 65 64 65 65 64 63 64 64 62 60 59 58 55 53 54 RH 87 93 93 90 65 53 48 62 87 97100100 69 58 52 64 81 87 90 86 Wind dir S S S S W W W W SW SW SW W NW NW NW NW NW NW NW NW Wind spd 3 3 2 2 3 5 5 3 2 2 2 2 5 9 10 9 6 4 4 5 Wind gust 19 Clouds B1 B1 SC FW SC SC SC FW FW FW FW SC B1 B1 B1 B1 B2 B1 B1 SC PoP 12hr 20 80 20 70 10 QPF 12hr 0 0.05 0 0.04 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 86 87 Max heat 86 87 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 78 48 78 50 82 53 86 56 89 Temp 74 70 53 52 75 69 53 54 79 73 55 55 83 76 58 58 86 78 Dewpt 51 48 48 47 46 48 49 49 50 53 52 53 54 56 55 54 56 59 PWind dir NW NW N W E S SE S SE Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ MDZ014-180800- Annapolis MD 38.99N 76.49W Elev. 7 ft 1038 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 70 83 71 82 66 Temp 72 74 75 75 80 82 81 76 73 72 72 72 79 81 80 75 71 68 66 68 Dewpt 69 72 73 74 75 75 73 72 72 71 71 70 69 69 68 67 66 63 61 61 RH 90 93 94 97 85 79 77 87 97 97 97 93 72 67 67 76 84 84 84 78 Wind dir S S S S S S S SE SW W W NW W W W NW NW NW NW NW Wind spd 10 8 8 9 11 12 10 5 2 2 3 5 6 9 10 10 10 10 11 11 Clouds B1 B1 B1 B2 B1 SC B1 B1 B2 SC B1 SC SC SC B1 B1 B2 B2 B2 SC PoP 12hr 20 90 50 60 20 QPF 12hr 0.05 0.87 0.18 0.04 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C L C L L S S Tstms S S C L C C C S Heat index 85 89 86 84 83 Max heat 89 86 84 84 Coast Flood Y Y Y Y Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 76 62 75 63 78 64 79 66 82 Temp 74 73 64 64 73 72 65 65 76 74 66 67 78 76 68 68 80 77 Dewpt 59 55 55 53 53 55 57 56 55 57 60 59 58 60 62 61 61 62 PWind dir NW N N N NE E E S S Wind char GN GN GN LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW FW PoP 12hr 10 5 0 0 0 0 0 0 5 $$