Point Forecast Matrices
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
615 FOUS51 KLWX 182102 PFMLWX Point Forecast Matrices National Weather Service Baltimore MD/Washington DC 501 PM EDT Fri Sep 18 2026 VAZ054-190800- Reagan National Airport-Arlington VA 38.86N 77.03W Elev. 66 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 80 68 84 68 Temp 77 73 70 67 66 73 78 79 75 71 69 69 70 77 82 83 78 74 72 70 68 Dewpt 68 63 61 59 57 59 61 62 64 65 66 66 67 67 68 69 70 70 70 68 66 RH 74 71 73 75 73 62 56 56 69 81 90 90 90 71 63 63 76 87 93 93 93 Wind dir N N NE NE NE NE E E E SE SE SE S S S S SW NW N N N Wind spd 9 9 9 10 9 9 8 8 9 9 8 8 9 11 12 11 8 6 6 8 10 Clouds SC B1 B1 B1 B2 B1 B1 B1 B1 B2 B2 OV B1 B1 B1 B2 B2 B2 B2 B2 B1 PoP 12hr 0 10 10 40 60 QPF 12hr 0 0 0 0.06 0.14 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L L S S S Tstms S C S Heat index 85 87 Max heat 87 85 87 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 65 68 60 64 59 65 58 69 Temp 74 74 67 65 66 65 61 60 62 62 59 59 64 62 58 58 67 65 Dewpt 65 64 63 61 62 59 57 56 58 58 57 56 58 58 57 55 56 57 PWind dir NE NE NE NE NE NE NE N N Wind char GN GN BZ BZ BZ BZ BZ GN BZ Avg clouds B1 B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 SC SC PoP 12hr 40 50 60 50 50 50 40 30 20 Rain shwrs S C C C C L C C C C C C C C C S S S Tstms S S S S $$ MDZ013-190800- Baltimore/Washington Airport-Anne Arundel MD 39.19N 76.67W Elev. 154 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 61 79 66 83 66 Temp 76 70 66 63 63 72 77 78 72 67 66 67 68 75 81 82 76 71 69 67 66 Dewpt 67 63 59 57 56 60 61 62 65 66 66 66 67 69 70 71 71 71 69 67 66 RH 74 78 78 81 78 66 58 58 79 97100 97 97 82 69 69 85100100100100 Wind dir N N NE NE NE NE E E SE SE SE SE S S S S SW W NW N N Wind spd 8 8 9 8 8 10 8 9 9 9 8 6 8 11 12 11 6 5 5 6 9 Clouds SC SC SC SC SC B1 B1 B1 B2 B2 OV OV B1 B2 B2 B1 B2 B2 B2 B1 B1 PoP 12hr 0 5 20 50 70 QPF 12hr 0 0 0 0.06 0.20 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C C L L C C S Tstms S C S Heat index 85 86 Max heat 86 85 86 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 75 60 68 56 65 56 66 55 70 Temp 73 71 62 61 65 63 57 56 63 61 56 57 65 62 55 56 69 64 Dewpt 66 64 62 60 62 60 56 56 59 59 56 56 60 59 55 56 57 58 PWind dir NE NE NE NE NE NE NE N N Wind char GN GN GN GN GN GN GN LT GN Avg clouds B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 50 50 40 50 50 40 30 20 Rain shwrs S C C C C C C C C C C C C C C S S S Tstms S S S S $$ MDZ011-190800- Baltimore Inner Harbor-Baltimore City MD 39.28N 76.61W Elev. 20 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 62 80 68 83 66 Temp 77 71 67 63 64 73 78 78 72 68 68 68 69 76 81 82 77 72 70 67 66 Dewpt 62 59 57 55 52 55 56 58 60 63 64 65 65 66 66 68 68 69 69 66 63 RH 60 66 70 75 65 53 47 50 66 84 87 90 87 71 60 63 74 90 97 97 90 Wind dir N N N N NE NE E E SE SE SE SE S S S S SW W NW N N Wind spd 8 9 9 9 8 9 8 9 8 9 8 8 8 11 12 11 6 5 5 6 9 Clouds SC SC SC SC SC B1 B1 B1 B2 B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 PoP 12hr 0 5 20 50 70 QPF 12hr 0 0 0 0.08 0.22 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S C C L L C C S Tstms S C S Heat index 83 85 Max heat 84 83 85 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 61 68 57 66 57 67 56 71 Temp 74 71 64 62 66 64 59 58 64 62 58 58 66 63 57 57 70 65 Dewpt 61 60 60 57 57 54 54 52 54 54 55 53 54 55 55 53 52 54 PWind dir NE NE NE NE NE NE NE N N Wind char GN GN BZ GN GN GN GN LT GN Avg clouds B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 50 50 40 50 50 40 30 20 Rain shwrs S C C C C C C C C C C C C C C S S S Tstms S S S S $$ WVZ052-190800- Martinsburg Airport-Berkeley WV 39.41N 77.98W Elev. 558 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 57 76 64 81 62 Temp 72 66 63 59 58 68 74 76 71 66 66 66 66 74 79 80 74 69 67 64 62 Dewpt 65 63 59 56 54 53 55 58 60 62 64 65 66 67 69 71 70 69 67 64 62 RH 79 90 87 90 86 59 51 54 68 87 93 97100 79 72 74 87100100100100 Wind dir N N N N N NE E SE SE SE S S S S SW SW W NW N N N Wind spd 5 5 5 6 5 6 6 9 5 5 6 6 9 12 11 9 4 3 5 5 8 Clouds SC B1 B1 B2 B2 B2 SC B1 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 0 5 30 80 70 QPF 12hr 0 0 0 0.11 0.17 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S D D L L S S S Tstms S S S Heat index 83 Max heat 82 85 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 70 56 62 51 58 51 62 50 67 Temp 68 68 61 59 61 60 55 53 58 56 53 53 61 57 53 53 66 61 Dewpt 60 60 60 58 57 57 55 52 53 54 53 53 54 55 53 53 54 54 PWind dir NE NE NE NE NE NE N N N Wind char GN LT GN GN GN LT LT LT LT Avg clouds B2 B2 B2 B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 70 80 70 60 60 40 30 20 Rain shwrs S C C L L D L L L L L C C C C C S S Tstms S S S S $$ VAZ506-190800- Washington Dulles Airport-Loudoun VA 38.96N 77.45W Elev. 321 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 61 79 66 83 65 Temp 74 69 66 63 62 71 77 77 72 68 67 67 68 76 81 82 77 71 70 67 65 Dewpt 70 66 62 59 58 61 64 65 66 67 67 66 67 70 72 73 72 71 70 67 65 RH 87 90 87 87 87 71 64 67 81 97100 97 97 82 74 74 85100100100100 Wind dir N N N N N NE E SE SE SE SE S S S S SW SW NW N N N Wind spd 6 6 6 6 5 8 6 8 5 8 6 6 8 12 12 11 4 3 5 5 9 Clouds SC B1 B1 B2 B1 B1 SC B1 B1 B2 OV B1 B1 B2 B1 B2 B2 B2 B2 B2 B1 PoP 12hr 0 5 10 50 60 QPF 12hr 0 0 0 0.09 0.15 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C L L S Tstms S C S Heat index 85 87 Max heat 85 85 89 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 74 61 66 56 62 55 64 54 69 Temp 72 70 64 62 64 63 58 56 61 60 56 56 63 60 56 55 67 62 Dewpt 68 66 63 61 64 62 57 55 61 60 56 56 61 60 56 55 60 60 PWind dir NE NE NE NE NE NE N N N Wind char GN GN GN GN GN GN GN LT GN Avg clouds B1 B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 60 60 60 50 50 40 30 20 Rain shwrs S C C L L L C L C C C C C C C S S S Tstms S S S S $$ VAZ037-190800- Charlottesville Airport-Albemarle VA 38.14N 78.45W Elev. 640 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 63 76 65 83 66 Temp 74 71 69 65 63 69 74 76 72 68 67 67 66 75 81 82 76 71 70 68 66 Dewpt 73 71 68 64 62 61 63 64 66 67 67 67 66 68 69 70 71 71 70 68 66 RH 97100 97 97 97 76 69 66 81 97100100100 79 67 67 85100100100100 Wind dir NE NE NE NE NE NE NE NE E NE S S S S SW SW SW SW N N N Wind spd 5 5 5 6 5 8 6 6 3 2 2 2 4 9 10 8 4 3 3 4 5 Clouds B1 B2 OV B2 B2 B2 B2 B2 B2 B2 OV OV SC B1 SC SC B1 B1 B1 B2 B1 PoP 12hr 20 10 10 30 40 QPF 12hr 0.01 0 0 0.05 0.04 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S S S C C C C S S Tstms S S S Heat index 84 86 Max heat 88 84 87 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 77 62 66 56 60 55 64 54 69 Temp 75 71 66 63 65 64 59 56 60 58 57 55 63 59 56 55 68 63 Dewpt 67 66 65 62 65 63 59 56 59 58 57 55 59 59 56 55 58 59 PWind dir NE NE NE NE NE N NE N N Wind char LT GN GN GN GN GN GN LT LT Avg clouds B1 B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 SC B1 PoP 12hr 50 70 70 70 60 50 40 20 20 Rain shwrs C L L L L L L L L C C C C S S S S Tstms S S S S S S $$ MDZ003-190800- Hagerstown Airport-Washington MD 39.71N 77.73W Elev. 705 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 56 77 65 80 62 Temp 71 65 61 58 58 68 75 76 71 66 66 66 66 72 78 79 74 69 66 63 62 Dewpt 65 61 58 54 53 55 57 59 62 62 64 65 66 68 71 72 71 69 66 63 61 RH 81 87 90 86 83 63 54 56 73 87 93 97100 87 79 79 90100100100 97 Wind dir N NE N N NE NE E SE SE SE SE S S S S SW W N N N N Wind spd 5 6 6 6 5 8 6 8 5 6 8 9 10 13 12 11 3 5 6 8 9 Clouds SC SC FW SC SC SC B1 B2 B2 B2 B2 OV B2 B2 OV OV B2 B2 B2 B2 B1 PoP 12hr 0 5 40 80 60 QPF 12hr 0 0 0 0.21 0.16 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C C C C D D L L S S S Tstms S C S Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 70 57 62 53 59 52 62 52 67 Temp 68 67 61 58 61 60 54 53 58 56 53 53 61 58 53 54 66 61 Dewpt 62 61 59 58 59 57 54 52 55 56 53 53 56 57 53 53 56 57 PWind dir NE NE NE NE NE NE NE N N Wind char GN GN GN GN GN GN GN LT LT Avg clouds B1 B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 B1 PoP 12hr 40 60 80 60 50 50 40 30 20 Rain shwrs S C C L L D L L C C C C C C C C S Tstms S S S S $$ MDZ017-190800- Patuxent River NAS MD 38.29N 76.41W Elev. 39 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 68 79 70 82 70 Temp 77 75 72 69 70 76 79 77 71 70 70 70 72 79 82 80 76 74 72 70 72 Dewpt 71 69 67 64 64 65 65 65 67 66 67 67 68 69 69 70 71 71 72 70 70 RH 82 82 84 84 81 69 62 67 87 87 90 90 87 72 65 72 85 90100100 93 Wind dir N NE NE NE NE NE E E E E SE SE S S S S S S W NW N Wind spd 9 6 9 11 11 11 8 10 11 11 10 10 9 12 12 12 11 9 8 8 10 Clouds SC SC B1 B2 B1 SC SC B1 B2 B1 SC SC FW SC SC SC B1 B1 B2 B1 B1 PoP 12hr 10 10 10 10 50 QPF 12hr 0 0 0 0 0.05 Snow 12hr 00-00 00-00 00-00 Rain shwrs C C S S C Tstms S S Heat index 85 83 Max heat 86 85 85 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 78 66 72 63 69 62 68 61 71 Temp 76 73 70 68 71 68 65 64 68 66 65 64 68 66 63 63 69 67 Dewpt 70 68 67 65 66 64 62 62 63 62 62 62 62 61 60 59 59 59 PWind dir NE NE NE NE NE NE NE N N Wind char GN GN BZ BZ BZ BZ BZ GN GN Avg clouds B2 B2 B2 OV B2 B2 B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 SC PoP 12hr 50 50 50 50 50 40 40 30 20 Rain shwrs C C C C C C C C C C C C C C C S S S Tstms S S S S S S $$ WVZ502-190800- Petersburg WV 38.99N 79.15W Elev. 963 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon 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 59 79 64 84 62 Temp 75 68 65 61 59 67 76 79 72 66 64 64 64 75 82 83 75 69 67 64 62 Dewpt 69 68 65 61 59 63 65 65 65 64 63 64 64 69 72 72 70 69 67 64 62 RH 82100100100100 87 69 62 79 93 97100100 82 72 70 84100100100100 Wind dir N N NE NE NE E SE SE SE S S S S S SW SW SW NW N N N Wind spd 4 2 3 3 3 4 5 6 3 4 5 5 5 8 8 5 3 2 3 3 3 Clouds B2 B2 B2 OV B2 B2 B1 B1 B2 B1 SC SC SC B2 B2 B2 B2 B2 B2 B2 B2 PoP 12hr 20 10 10 70 60 QPF 12hr 0.01 0 0 0.11 0.02 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C C L L L L C C L Tstms S C S S Obvis F F F Heat index 87 88 Max heat 88 87 88 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 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 73 58 67 53 61 52 64 52 70 Temp 71 68 62 59 64 62 56 53 59 58 53 52 62 58 53 53 68 62 Dewpt 66 64 61 59 64 60 56 53 58 57 53 52 60 58 53 53 58 57 PWind dir NE E E NE NE NE NE N N Wind char LT LT LT LT LT LT LT LT LT Avg clouds B2 B2 OV OV OV OV OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 PoP 12hr 70 80 90 80 60 60 50 30 30 Rain shwrs L L L D D D D L L C L C C C C C C C Tstms S S S S $$ MDZ014-190800- Annapolis MD 38.99N 76.49W Elev. 7 ft 501 PM EDT Fri Sep 18 2026 Date 09/18/26 Sat 09/19/26 Sun 09/20/26 Mon EDT 3hrly 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 Min/Max 64 77 67 81 68 Temp 78 73 69 66 66 73 77 77 73 67 68 68 69 78 81 81 77 72 70 68 68 Dewpt 68 65 62 59 58 60 61 61 64 66 66 66 66 67 68 69 70 71 70 68 66 RH 71 76 78 78 75 64 58 58 73 97 93 93 90 69 65 67 79 97100100 93 Wind dir N N NE NE NE NE E E E SE SE SE S S S S S W NW N N Wind spd 8 11 11 12 11 10 8 9 11 10 9 10 9 13 14 13 9 8 6 9 11 Clouds SC B1 SC B1 B1 B1 B1 SC B2 B1 B2 OV B1 B1 B2 B1 B2 B2 B2 B2 B1 PoP 12hr 0 10 20 30 70 QPF 12hr 0 0 0 0 0.18 Snow 12hr 00-00 00-00 00-00 Rain shwrs S S C C L L C C S Tstms S C S Heat index 84 84 Max heat 86 84 84 Date 09/21 Tue 09/22/26 Wed 09/23/26 Thu 09/24/26 Fri 09/25/26 EDT 6hrly 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 Max/Min 75 63 71 60 68 60 69 58 72 Temp 75 72 65 64 70 66 61 61 68 65 60 61 68 66 59 59 70 67 Dewpt 65 65 63 62 63 60 58 58 61 60 58 59 61 59 58 57 58 59 PWind dir NE NE NE NE NE NE NE N N Wind char GN GN BZ BZ BZ GN GN GN GN Avg clouds B2 B2 OV OV B2 OV OV B2 B2 B2 B2 B2 B2 B2 B2 B1 B1 B1 PoP 12hr 50 50 50 40 50 40 40 30 20 Rain shwrs S C C C C C C C C C C C C C C S S S Tstms S S S S $$