Alert archive / Pennsylvania / Areal Flood Warnings in 2026
Areal Flood Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 3, 2026, 5:26 AM EDT for 4 counties in New Jersey; 5 counties in Pennsylvania; New Castle County, Delaware. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 3, 2026, 5:26 AM EDT (09:26 UTC)
- Expired
- Sep 3, 2026, 9:15 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 72 km from the middle of the area, began a volume at 09:27 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, 9.4 hours before the alert went out and 213 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
- 316 J/kg
- Mixed-layer CIN
- -263 J/kg
- Mixed-layer LCL
- 1068 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.8
What forecasters said that day
The local office's own words before this areal flood warning 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 areal flood warning went out at Sep 3, 3:13 AM EDT, 2 hours 13 minutes earlier.
Area forecast discussion, Sep 3, 3:13 AM EDT, 2 hours 13 minutes before
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</html>Hazardous weather outlook, Sep 3, 4:36 AM EDT, 50 minutes before
Hazardous Weather Outlook National Weather Service Mount Holly NJ 436 AM EDT Thu Sep 3 2026 MDZ012-015-019-020-040845- Kent MD-Queen Annes-Talbot-Caroline- 436 AM EDT Thu Sep 3 2026 ...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for northeast Maryland. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Heat Advisory. Severe thunderstorms are possible today into tonight. Heat indicies will be in the 105 to 108 range this afternoon. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Local storm report, Sep 3, 4:04 AM EDT, 1 hour 22 minutes before
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</html>Local storm report, Sep 3, 4:07 AM EDT, 1 hour 19 minutes before
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</html>Local storm report, Sep 3, 4:10 AM EDT, 1 hour 16 minutes before
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</html>Local storm report, Sep 3, 4:54 AM EDT, 32 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 |
|---|---|---|---|---|
| Sep 3, 1:34 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Sep 3, 8:09 AM EDT | River Flood Warning | PHI | Chester | 3 hr |
| Sep 3, 12:02 AM EDT | Severe Thunderstorm Warning | PHI | Kent | 43 min |
Nearby
Areal Flood Warnings in Pennsylvania, 2026Areal Flood Warnings in New Jersey, 2026Areal Flood Warnings in Delaware, 2026Every areal flood warning in 2026
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.