Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
373 FOUS51 KLWX 171940 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 340 PM EDT Sat Aug 17 2024 VAZ054-180800- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 340 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 88 71 86 67 Temp 84 78 76 75 74 75 80 85 83 78 75 74 73 73 82 86 85 77 73 71 69 67 Dewpt 72 73 72 71 71 71 73 73 73 72 71 70 69 68 68 66 66 65 64 62 59 58 RH 67 85 87 87 90 87 79 67 72 82 87 87 87 84 63 51 53 67 73 73 70 73 Wind dir S SE SE S S S S S S SE SW W W NW NW W W NW NW NW NW NW Wind spd 8 8 6 5 5 5 6 8 8 6 4 3 4 5 8 11 12 12 12 12 12 12 Clouds B2 B2 B2 B1 B2 OV B2 B1 B1 B2 B1 B1 B1 SC SC B1 B1 B2 B2 B1 B1 SC PoP 12hr 50 90 50 60 20 QPF 12hr 0.11 0.69 0.15 0.09 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs L C C S C S C L D C C S S L L S S Tstms C C C S C S C L L C C S C C S S Heat index 90 84 92 89 85 88 87 Max heat 91 92 91 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 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 $$ MDZ013-180800- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 340 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 71 86 70 85 64 Temp 82 77 73 73 72 74 79 83 82 76 72 71 70 71 81 85 83 75 69 67 64 65 Dewpt 72 72 72 71 71 73 74 74 74 72 71 70 69 69 70 70 70 68 66 62 59 59 RH 72 85 97 93 97 97 85 74 77 87 97 97 97 93 69 61 65 79 90 84 84 81 Wind dir SE SE SE SE SE SE S S S SE S W W NW W W W NW NW NW NW NW Wind spd 9 6 5 4 4 4 6 8 9 5 3 2 2 4 6 8 9 9 9 9 10 10 Clouds B2 B2 B2 B2 B2 OV B2 B1 B2 B2 B2 B1 B1 B1 SC B1 B1 B2 B2 B2 B1 SC PoP 12hr 50 90 50 60 20 QPF 12hr 0.14 0.71 0.24 0.08 0.09 Snow 12hr 00-00 00-00 00-00 Rain shwrs L C C C C C C L D C C S S L L S S S S Tstms C C C C C C C L D C C S C C S S S Heat index 87 90 88 85 90 87 Max heat 87 90 91 90 90 Coast Flood Y Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 77 58 77 60 80 60 83 62 85 Temp 74 71 60 60 75 71 62 62 78 73 63 63 81 76 65 66 83 78 Dewpt 57 55 52 53 52 54 55 56 54 57 58 58 57 59 60 61 60 62 PWind dir NW N N N NE SE E S S Wind char GN LT LT LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 10 0 0 0 0 0 0 0 5 $$ MDZ011-180800- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 340 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 86 71 86 67 Temp 83 78 76 75 74 75 81 84 83 78 75 73 73 73 83 86 85 78 74 72 69 67 Dewpt 72 71 71 71 71 71 73 73 74 72 70 70 69 68 68 67 67 65 64 62 58 57 RH 70 79 85 87 90 87 77 70 74 82 84 90 87 84 61 53 55 64 71 71 68 70 Wind dir SE SE SE SE SE SE S S S SE S W W W W W W NW NW NW NW NW Wind spd 9 6 4 4 4 4 6 8 9 5 3 3 2 4 6 9 10 8 9 10 10 10 Clouds B2 B2 B2 B2 B2 OV B2 B2 B2 B2 B2 B1 B1 B1 SC B1 B1 B2 B2 B2 B1 SC PoP 12hr 50 90 50 60 30 QPF 12hr 0.15 0.81 0.24 0.11 0.07 Snow 12hr 00-00 00-00 00-00 Rain shwrs L C C C C C C L D C C S S L L C C S S Tstms C C C C C C C L D C C S C C C S S Heat index 88 86 90 90 86 89 88 Max heat 88 90 91 89 89 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 $$ WVZ052-180800- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 340 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 67 84 65 81 59 Temp 82 76 71 69 67 69 78 82 79 75 68 67 66 68 77 81 78 72 65 62 60 62 Dewpt 70 69 69 68 67 69 70 70 69 69 67 65 64 66 65 65 63 60 59 57 56 56 RH 67 79 93 97100100 76 67 72 82 97 93 93 93 67 58 60 66 81 84 87 81 Wind dir SE SE SE SE SE S S S SW W W W W W NW W NW NW NW NW NW NW Wind spd 6 4 3 2 2 2 3 5 5 3 2 2 3 4 8 10 12 9 10 9 10 10 Clouds B2 SC SC B1 B2 B2 B1 B2 B1 SC SC SC SC SC SC B1 B2 B2 B2 B1 B1 SC PoP 12hr 30 90 20 70 30 QPF 12hr 0.02 0.49 0.04 0.14 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S C C D D S S C C L L C C S S Tstms C C S S S C L L S S S C C C S Heat index 86 86 83 Max heat 86 86 85 83 83 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 76 51 75 50 78 53 81 56 84 Temp 73 70 55 55 71 68 55 55 75 71 56 57 79 74 59 60 81 77 Dewpt 53 49 48 48 48 49 51 51 51 53 53 53 54 56 56 56 57 59 PWind dir NW N N NW NE E SE S S Wind char GN LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW CL FW FW FW CL FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ VAZ506-180800- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 340 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 68 84 63 Temp 82 77 73 72 72 73 80 86 82 77 72 70 68 70 81 84 80 73 69 67 65 63 Dewpt 73 72 72 71 71 71 74 72 72 71 71 69 67 68 70 69 69 67 65 62 58 59 RH 74 85 97 97 97 93 82 63 72 82 97 97 97 93 69 61 69 81 87 84 78 87 Wind dir S SE SE S S S S S SW NE S W NW NW NW W NW NW NW NW NW NW Wind spd 6 6 5 4 4 4 5 6 5 5 2 3 3 5 8 9 10 9 10 10 11 10 Clouds B2 B1 B1 B1 B2 B2 B2 B1 B2 B1 B1 SC SC SC SC B1 B2 B2 B2 B1 B1 SC PoP 12hr 40 90 40 70 20 QPF 12hr 0.09 0.45 0.06 0.14 0.04 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C C S S S C L D C C S S L L S S S S Tstms C C C S S S C L L C C S C C S S S Heat index 87 84 92 87 85 88 83 Max heat 90 92 91 88 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 $$ VAZ037-180800- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 340 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 69 88 67 84 61 Temp 85 78 74 72 70 71 82 86 83 77 72 69 67 69 81 84 81 75 69 66 62 63 Dewpt 71 70 70 70 69 70 70 69 68 68 68 67 65 66 65 65 65 63 62 60 58 58 RH 63 76 87 93 97 97 67 57 61 74 87 93 93 90 58 53 58 66 78 81 87 84 Wind dir S SE SE S S S S S SW W NW NW W W NW W NW NW NW NW NW NW Wind spd 6 4 3 2 2 3 4 6 6 4 2 2 2 3 5 8 8 6 6 6 6 6 Clouds B1 B1 SC B1 B1 B1 SC SC SC SC SC SC SC SC SC B1 B1 B1 B1 SC SC SC PoP 12hr 20 70 20 70 20 QPF 12hr 0.02 0.21 0.01 0.15 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S S S S L L S S C C L L S S Tstms C S S S C C S S C L C S S Heat index 90 86 90 86 83 86 83 Max heat 91 90 89 86 85 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 80 54 77 54 80 56 82 59 85 Temp 76 72 59 58 75 69 58 58 78 73 59 60 81 72 61 62 84 74 Dewpt 54 52 52 51 49 50 52 52 51 54 55 56 55 57 58 58 59 60 PWind dir N N N N NE N E SW S Wind char LT LT LT LT LT LT LT LT LT Avg clouds SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 5 0 0 0 0 0 0 0 5 $$ MDZ003-180800- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 340 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 59 Temp 82 77 72 71 70 71 78 82 81 75 70 68 66 68 78 81 80 71 66 64 61 60 Dewpt 71 71 69 69 69 70 72 71 70 69 68 67 65 67 69 69 68 64 61 59 56 56 RH 69 82 90 93 97 97 82 69 69 82 93 97 97 97 74 67 67 79 84 84 84 87 Wind dir S SE SE SE S S SW S SW SW SW W W W W W NW NW NW NW NW NW Wind spd 8 6 5 4 3 3 4 5 5 4 2 2 2 3 8 10 12 10 9 9 10 10 Clouds B2 SC B1 B2 B2 B2 B1 B1 B2 B1 B1 SC B1 B1 SC B1 B2 B2 B2 B1 B1 SC PoP 12hr 30 90 20 70 30 QPF 12hr 0.14 0.42 0.08 0.19 0.03 Snow 12hr 00-00 00-00 00-00 Rain shwrs C S C C C C C D D S S C C L L C C S S Tstms C S C C C S C L L S S S C C C S S Heat index 86 86 85 84 83 Max heat 87 86 86 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 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 $$ MDZ017-180800- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 340 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 74 87 71 87 67 Temp 83 78 76 75 74 76 81 85 84 78 74 73 71 74 81 86 85 76 73 69 67 69 Dewpt 72 72 71 71 71 72 74 75 74 72 71 71 70 70 70 70 70 70 67 65 62 61 RH 70 82 85 87 90 87 79 72 72 82 90 93 97 87 69 59 61 82 81 87 84 76 Wind dir S S S S S S S S S S S W W NW NW W W W NW NW NW NW Wind spd 13 11 9 9 9 9 9 11 11 9 5 5 5 5 6 8 9 8 10 11 12 11 Clouds B1 B1 B2 B1 B1 B2 B1 B1 B1 B2 B1 B1 SC B1 SC SC B1 B2 B1 B1 SC SC PoP 12hr 60 70 60 50 20 QPF 12hr 0.26 0.55 0.29 0.09 0 Snow 12hr 00-00 00-00 00-00 Rain shwrs C L C C C S L L L L C C S S Tstms C C C C C S C L L C C C S S Heat index 88 86 94 91 85 91 90 Max heat 90 94 93 91 92 Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 79 62 77 63 81 64 83 66 84 Temp 77 73 65 64 75 72 65 67 79 74 66 68 81 76 68 69 82 77 Dewpt 60 57 56 56 54 55 56 58 56 57 58 60 58 59 61 62 60 61 PWind dir NW N N N NE E E E E Wind char GN GN GN LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW FW PoP 12hr 10 0 0 0 0 0 0 0 5 $$ WVZ502-180800- Petersburg WV 38.99N 79.15W Elev. 963 ft 340 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 86 63 80 55 Temp 89 80 72 69 66 68 80 83 83 75 69 66 64 66 77 79 79 72 64 59 56 58 Dewpt 62 66 67 65 64 65 66 66 65 65 65 64 63 64 65 63 61 60 58 57 54 54 RH 41 62 84 87 93 90 62 57 55 71 87 93 97 93 67 58 54 66 81 93 93 86 Wind dir W S S SW S SW SW W W W W SW SW W NW NW NW NW NW NW NW NW Wind spd 5 4 2 2 2 2 4 5 6 4 2 2 2 2 5 9 11 9 8 5 5 5 Clouds B1 SC SC B1 SC SC B1 B1 SC SC SC SC SC B1 B1 B1 B2 B2 B1 B1 B1 SC PoP 12hr 30 90 30 70 30 QPF 12hr 0.01 0.16 0.03 0.10 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C S S C L L D C C S S L L L L C C S S Tstms S S S S S C C C C S S S C C C Heat index 89 82 82 85 85 Max heat 90 85 85 81 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 $$ MDZ014-180800- Annapolis MD 38.99N 76.49W Elev. 7 ft 340 PM EDT Sat Aug 17 2024 Date 08/17/24 Sun 08/18/24 Mon 08/19/24 Tue EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 73 84 71 82 67 Temp 81 77 75 74 74 74 80 83 82 76 73 72 72 73 79 81 82 77 72 70 69 67 Dewpt 72 72 72 72 72 72 75 75 74 73 72 71 70 70 70 69 68 68 67 64 62 61 RH 74 85 90 93 93 93 85 77 77 90 97 97 93 90 74 67 63 74 84 81 78 81 Wind dir S S S S S S S S S S SW W W NW W W W NW NW NW NW NW Wind spd 11 10 9 6 6 8 8 10 11 6 4 4 3 5 6 10 11 10 11 11 12 11 Clouds B1 B2 B2 B2 B2 OV B2 B1 B1 B2 B2 B1 B1 B1 SC SC B1 B2 B1 B2 B1 SC PoP 12hr 60 90 60 60 20 QPF 12hr 0.21 0.68 0.29 0.06 0.05 Snow 12hr 00-00 00-00 00-00 Rain shwrs L C L C C C C L D L L S S S S L L S S S S Tstms C C C C C C C L L L C S S S C C S S S Heat index 85 85 90 88 84 85 Max heat 87 90 89 84 85 Coast Flood Y Date 08/20 Wed 08/21/24 Thu 08/22/24 Fri 08/23/24 Sat 08/24/24 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 76 62 75 63 78 64 79 66 82 Temp 74 73 64 64 73 72 65 65 76 74 66 67 78 76 68 68 80 77 Dewpt 59 55 55 53 53 55 57 56 55 57 60 59 58 60 62 61 61 62 PWind dir NW N N N NE E E S S Wind char GN GN GN LT LT LT LT LT LT Avg clouds SC SC FW FW FW FW FW FW FW CL FW FW FW FW FW FW FW FW PoP 12hr 10 5 0 0 0 0 0 0 5 $$