Alert archive / Pennsylvania / Areal Flood Warnings in 2024
Areal Flood Warning 84, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Jul 13, 2024, 3:18 AM EDT for Berks County, Pennsylvania. 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
- Jul 13, 2024, 3:18 AM EDT (07:18 UTC)
- Expired
- Jul 13, 2024, 7:30 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 07:20 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, 7.3 hours before the alert went out and 280 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
- 904 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 711 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
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 Jul 12, 9:40 PM EDT, 5 hours 38 minutes earlier.
Area forecast discussion, Jul 12, 9:40 PM EDT, 5 hours 38 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 |
|---|---|---|---|---|
| Jul 13, 8:11 AM EDT | Areal Flood Warning | PHI | Atlantic, Cape May | 4 hr |
| Jul 13, 2:12 PM EDT | Marine Dense Fog Advisory | PHI | 16 hr | |
| Jul 13, 5:44 AM EDT | Areal Flood Warning | PHI | Lehigh, Northampton | 3 hr |
| Jul 13, 3:52 AM EDT | Areal Flood Warning | PHI | Kent, Sussex | 6 hr |
Nearby
Areal Flood Warnings in Pennsylvania, 2024Every areal flood warning in 2024
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.