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Home Return to list Dense Fog Advisory 0013 Issued by the Baltimore / Washington Forecast Office
Action: New Issued At: 2026-08-15 00:49:10 526 WWUS71 KLWX 150548 NPWLWX URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 148 AM EDT Sat Aug 15 2026 MDZ501-502-509-510-WVZ050-503-504-151300- /O.NEW.KLWX.FG.Y.0013.260815T0548Z-260815T1300Z/ Extreme Western Allegany-Central and Eastern Allegany-Western Garrett-Eastern Garrett-Hampshire-Western Mineral-Eastern Mineral- 148 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Maryland, Allegany and Garrett Counties. In West Virginia, Hampshire and Mineral Counties. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ DHOF Action: Area Extended Issued At: 2026-08-15 03:11:44 974 WWUS71 KLWX 150811 NPWLWX URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 411 AM EDT Sat Aug 15 2026 MDZ003-VAZ027>031-WVZ051>053-055-502-151300- /O.EXA.KLWX.FG.Y.0013.000000T0000Z-260815T1300Z/ Washington-Shenandoah-Frederick-Page-Warren-Clarke-Morgan- Berkeley-Jefferson-Hardy-Eastern Grant- 411 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of north central Maryland, northwest Virginia, and eastern West Virginia. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MDZ501-502-509-510-WVZ050-503-504-151300- /O.CON.KLWX.FG.Y.0013.000000T0000Z-260815T1300Z/ Extreme Western Allegany-Central and Eastern Allegany-Western Garrett-Eastern Garrett-Hampshire-Western Mineral-Eastern Mineral- 411 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Maryland, Allegany and Garrett Counties. In West Virginia, Hampshire and Mineral Counties. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ DHOF Action: Continued Issued At: 2026-08-15 03:11:44 974 WWUS71 KLWX 150811 NPWLWX URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 411 AM EDT Sat Aug 15 2026 MDZ003-VAZ027>031-WVZ051>053-055-502-151300- /O.EXA.KLWX.FG.Y.0013.000000T0000Z-260815T1300Z/ Washington-Shenandoah-Frederick-Page-Warren-Clarke-Morgan- Berkeley-Jefferson-Hardy-Eastern Grant- 411 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of north central Maryland, northwest Virginia, and eastern West Virginia. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ MDZ501-502-509-510-WVZ050-503-504-151300- /O.CON.KLWX.FG.Y.0013.000000T0000Z-260815T1300Z/ Extreme Western Allegany-Central and Eastern Allegany-Western Garrett-Eastern Garrett-Hampshire-Western Mineral-Eastern Mineral- 411 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Maryland, Allegany and Garrett Counties. In West Virginia, Hampshire and Mineral Counties. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ DHOF Action: Time Extended Issued At: 2026-08-15 07:57:42 389 WWUS71 KLWX 151257 NPWLWX URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 857 AM EDT Sat Aug 15 2026 MDZ003-VAZ027-029>031-WVZ051>053-055-502-151400- /O.EXP.KLWX.FG.Y.0013.000000T0000Z-260815T1300Z/ Washington-Shenandoah-Page-Warren-Clarke-Morgan-Berkeley- Jefferson-Hardy-Eastern Grant- 857 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING... Visibility is improving. $$ MDZ501-502-509-510-VAZ028-WVZ050-503-504-151400- /O.EXT.KLWX.FG.Y.0013.000000T0000Z-260815T1400Z/ Extreme Western Allegany-Central and Eastern Allegany-Western Garrett-Eastern Garrett-Frederick-Hampshire-Western Mineral- Eastern Mineral- 857 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 10 AM EDT THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...In Maryland, Central and Eastern Allegany, Eastern Garrett, Extreme Western Allegany, and Western Garrett Counties. In Virginia, Frederick County. In West Virginia, Eastern Mineral, Hampshire, and Western Mineral Counties. * WHEN...Until 10 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ ADS Action: Expired Issued At: 2026-08-15 07:57:42 389 WWUS71 KLWX 151257 NPWLWX URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 857 AM EDT Sat Aug 15 2026 MDZ003-VAZ027-029>031-WVZ051>053-055-502-151400- /O.EXP.KLWX.FG.Y.0013.000000T0000Z-260815T1300Z/ Washington-Shenandoah-Page-Warren-Clarke-Morgan-Berkeley- Jefferson-Hardy-Eastern Grant- 857 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY WILL EXPIRE AT 9 AM EDT THIS MORNING... Visibility is improving. $$ MDZ501-502-509-510-VAZ028-WVZ050-503-504-151400- /O.EXT.KLWX.FG.Y.0013.000000T0000Z-260815T1400Z/ Extreme Western Allegany-Central and Eastern Allegany-Western Garrett-Eastern Garrett-Frederick-Hampshire-Western Mineral- Eastern Mineral- 857 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 10 AM EDT THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...In Maryland, Central and Eastern Allegany, Eastern Garrett, Extreme Western Allegany, and Western Garrett Counties. In Virginia, Frederick County. In West Virginia, Eastern Mineral, Hampshire, and Western Mineral Counties. * WHEN...Until 10 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ ADS Action: Expired Issued At: 2026-08-15 08:50:15 665 WWUS71 KLWX 151349 NPWLWX URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 949 AM EDT Sat Aug 15 2026 MDZ501-502-509-510-VAZ028-WVZ050-503-504-151500- /O.EXP.KLWX.FG.Y.0013.000000T0000Z-260815T1400Z/ Extreme Western Allegany-Central and Eastern Allegany-Western Garrett-Eastern Garrett-Frederick-Hampshire-Western Mineral- Eastern Mineral- 949 AM EDT Sat Aug 15 2026 ...DENSE FOG ADVISORY WILL EXPIRE AT 10 AM EDT THIS MORNING... Earlier fog has dissipated and visibilities have increased. $$ KJP | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||