Alert archive / New Jersey / Dense Fog Advisories in 2021
Dense Fog Advisory 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this dense fog advisory at Aug 30, 2021, 5:44 AM EDT for 9 counties in New Jersey. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 30, 2021, 5:44 AM EDT (09:44 UTC)
- Expired
- Aug 30, 2021, 9:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Monmouth County, NJ, Ocean County, NJ, Salem County, NJ
The radar
The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 09:44 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 00:00Z, 9.7 hours before the alert went out and 200 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 787 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 731 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
668 WWUS71 KPHI 300944 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 544 AM EDT Mon Aug 30 2021 NJZ013-014-016>027-301200- /O.NEW.KPHI.FG.Y.0005.210830T0944Z-210830T1200Z/ Western Monmouth-Eastern Monmouth-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- Including the cities of Freehold, Sandy Hook, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Long Beach Island, and Wharton State Forest 544 AM EDT Mon Aug 30 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING... * WHAT...Visibility a quarter mile or less at times in dense fog. * WHERE...Portions of central and southern New Jersey. * WHEN...Until 8 AM EDT this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ CMS
2 follow-up statements
841 WWUS71 KPHI 301156 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 756 AM EDT Mon Aug 30 2021 NJZ013-014-016>027-301300- /O.EXT.KPHI.FG.Y.0005.000000T0000Z-210830T1300Z/ Western Monmouth-Eastern Monmouth-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- Including the cities of Freehold, Sandy Hook, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Long Beach Island, and Wharton State Forest 756 AM EDT Mon Aug 30 2021 ...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Visibility a quarter mile or less at times in dense fog. * WHERE...Portions of central and southern New Jersey. * WHEN...Until 9 AM EDT this morning. * IMPACTS...Hazardous driving conditions due to low visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ JEO
031 WWUS71 KPHI 301327 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 927 AM EDT Mon Aug 30 2021 NJZ013-014-016>027-301430- /O.EXP.KPHI.FG.Y.0005.000000T0000Z-210830T1300Z/ Western Monmouth-Eastern Monmouth-Salem-Gloucester-Camden- Northwestern Burlington-Ocean-Cumberland-Atlantic-Cape May- Atlantic Coastal Cape May-Coastal Atlantic-Coastal Ocean- Southeastern Burlington- Including the cities of Freehold, Sandy Hook, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Millville, Hammonton, Cape May Court House, Ocean City, Atlantic City, Long Beach Island, and Wharton State Forest 927 AM EDT Mon Aug 30 2021 ...DENSE FOG ADVISORY HAS EXPIRED... Visibility has improved and fog is no longer expected to pose a threat. The advisory has been allowed to expire. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 5:00 AM EDT | Flash Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 71 hr |
| Aug 30, 4:48 PM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 27 min |
| Aug 30, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Cape May, Cumberland | 44 min |
| Aug 30, 5:21 PM EDT | Special Weather Statement | PHI | Atlantic | 24 min |
| Aug 30, 5:26 PM EDT | Special Marine Warning | PHI | 64 min | |
| Aug 30, 5:44 PM EDT | Special Marine Warning | PHI | 61 min | |
| Aug 30, 5:53 PM EDT | Special Weather Statement | PHI | Atlantic | 22 min |
| Aug 30, 5:56 PM EDT | Special Weather Statement | PHI | Cape May | 49 min |
| Aug 30, 6:16 PM EDT | Special Marine Warning | PHI | 89 min | |
| Aug 30, 6:41 PM EDT | Special Weather Statement | PHI | Cape May | 34 min |
| Aug 30, 7:20 PM EDT | Special Weather Statement | PHI | Cape May | 25 min |
| Aug 30, 7:31 PM EDT | Special Marine Warning | PHI | 59 min |
Nearby
Dense Fog Advisories in New Jersey, 2021Every dense fog advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.