Alert archive / New Jersey / Dense Fog Advisories in 2020
Dense Fog Advisory 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this dense fog advisory at Feb 26, 2020, 12:53 AM EST for 4 counties in New Jersey; Chester County, Pennsylvania; Kent County, New Castle County, Sussex County, Delaware. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Feb 26, 2020, 12:53 AM EST (05:53 UTC)
- Expired
- Feb 26, 2020, 9:00 AM EST
- In force
- 8 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ, Chester County, PA
The radar
The Dover AFB radar (KDOX), 60 km from the middle of the area, began a volume at 05:50 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 5.9 hours before the alert went out and 189 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 542 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before this dense fog advisory went out at Feb 25, 9:34 PM EST, 3 hours 19 minutes earlier.
Area forecast discussion, Feb 25, 9:34 PM EST, 3 hours 19 minutes before
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</html>The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 26, 12:54 AM EST | Marine Dense Fog Advisory | PHI | 8 hr | |
| Feb 26, 2:40 PM EST | Gale Warning | PHI | 37 hr |
Nearby
Dense Fog Advisories in New Jersey, 2020Dense Fog Advisories in Delaware, 2020Dense Fog Advisories in Pennsylvania, 2020Every dense fog advisory in 2020
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.