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Home Return to list Dense Fog Advisory 0011 Issued by the Mount Holly / Philadelphia Forecast Office
Action: New Issued At: 2026-03-21 02:26:17 094 WWUS71 KPHI 210725 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 325 AM EDT Sat Mar 21 2026 NJZ001-007>010-PAZ054-055-060>062-101>106-211200- /O.NEW.KPHI.FG.Y.0011.260321T0725Z-260321T1200Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks- Lehigh-Northampton-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Lansdale, Flemington, Morrisville, Jim Thorpe, Morristown, Chalfont, Pottstown, Collegeville, Perkasie, Kennett Square, Oxford, Bethlehem, West Chester, Norristown, Somerville, Newton, Stroudsburg, Doylestown, Reading, Allentown, Easton, Honey Brook, and Washington 325 AM EDT Sat Mar 21 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN...Until 8 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. && $$ Fitzsimmons Action: Area Extended Issued At: 2026-03-21 04:29:34 847 WWUS71 KPHI 210929 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 529 AM EDT Sat Mar 21 2026 DEZ001-NJZ012-015>019-PAZ070-071-211200- /O.EXA.KPHI.FG.Y.0011.000000T0000Z-260321T1200Z/ New Castle-Middlesex-Mercer-Salem-Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia- Including the cities of Cherry Hill, Mount Holly, New Brunswick, Philadelphia, Moorestown, Media, Glassboro, Pennsville, Wilmington, Camden, and Trenton 529 AM EDT Sat Mar 21 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...In Delaware, New Castle County. In New Jersey, Mercer, Middlesex, Camden, Gloucester, Northwestern Burlington, and Salem Counties. In Pennsylvania, Delaware and Philadelphia Counties. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ NJZ001-007>010-PAZ054-055-060>062-101>106-211200- /O.CON.KPHI.FG.Y.0011.000000T0000Z-260321T1200Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks- Lehigh-Northampton-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Lansdale, Flemington, Morrisville, Jim Thorpe, Morristown, Chalfont, Pottstown, Collegeville, Perkasie, Kennett Square, Oxford, Bethlehem, West Chester, Norristown, Somerville, Newton, Stroudsburg, Doylestown, Reading, Allentown, Easton, Honey Brook, and Washington 529 AM EDT Sat Mar 21 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN...Until 8 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. && $$ Fitzsimmons Action: Continued Issued At: 2026-03-21 04:29:34 847 WWUS71 KPHI 210929 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 529 AM EDT Sat Mar 21 2026 DEZ001-NJZ012-015>019-PAZ070-071-211200- /O.EXA.KPHI.FG.Y.0011.000000T0000Z-260321T1200Z/ New Castle-Middlesex-Mercer-Salem-Gloucester-Camden-Northwestern Burlington-Delaware-Philadelphia- Including the cities of Cherry Hill, Mount Holly, New Brunswick, Philadelphia, Moorestown, Media, Glassboro, Pennsville, Wilmington, Camden, and Trenton 529 AM EDT Sat Mar 21 2026 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...In Delaware, New Castle County. In New Jersey, Mercer, Middlesex, Camden, Gloucester, Northwestern Burlington, and Salem Counties. In Pennsylvania, Delaware and Philadelphia Counties. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ NJZ001-007>010-PAZ054-055-060>062-101>106-211200- /O.CON.KPHI.FG.Y.0011.000000T0000Z-260321T1200Z/ Sussex-Warren-Morris-Hunterdon-Somerset-Carbon-Monroe-Berks- Lehigh-Northampton-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks-Lower Bucks- Including the cities of Lansdale, Flemington, Morrisville, Jim Thorpe, Morristown, Chalfont, Pottstown, Collegeville, Perkasie, Kennett Square, Oxford, Bethlehem, West Chester, Norristown, Somerville, Newton, Stroudsburg, Doylestown, Reading, Allentown, Easton, Honey Brook, and Washington 529 AM EDT Sat Mar 21 2026 ...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Visibility as low as one quarter mile in dense fog. * WHERE...Portions of northern and northwest New Jersey and east central, northeast, and southeast Pennsylvania. * WHEN...Until 8 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. && $$ Fitzsimmons Action: Expired Issued At: 2026-03-21 06:59:40 831 WWUS71 KPHI 211159 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 759 AM EDT Sat Mar 21 2026 DEZ001-NJZ001-007>010-012-015>019-PAZ054-055-060>062-070-071-101>106- 211300- /O.EXP.KPHI.FG.Y.0011.000000T0000Z-260321T1200Z/ New Castle-Sussex-Warren-Morris-Hunterdon-Somerset-Middlesex- Mercer-Salem-Gloucester-Camden-Northwestern Burlington-Carbon- Monroe-Berks-Lehigh-Northampton-Delaware-Philadelphia-Western Chester-Eastern Chester-Western Montgomery-Eastern Montgomery- Upper Bucks-Lower Bucks- Including the cities of Morrisville, Trenton, Chalfont, Somerville, Oxford, West Chester, Flemington, Perkasie, Pottstown, Honey Brook, Mount Holly, Allentown, Pennsville, Moorestown, Camden, Morristown, Bethlehem, Newton, Kennett Square, Easton, Norristown, Stroudsburg, Cherry Hill, Jim Thorpe, Philadelphia, Washington, Reading, Media, Doylestown, Lansdale, New Brunswick, Glassboro, Wilmington, and Collegeville 759 AM EDT Sat Mar 21 2026 ...DENSE FOG ADVISORY WILL EXPIRE AT 8 AM EDT THIS MORNING... Visibilities are improving this morning. While some localized areas of patchy fog may persist for the next hour or so, the widespread threat of dense fog has ended. $$ DeSilva | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||