Alert archive / Pennsylvania / Fire Weather Watches in 2023
Fire Weather Watch 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this fire weather watch at Apr 11, 2023, 3:46 PM EDT for 10 counties in Pennsylvania. It took effect at Apr 12, 2023, 11:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Apr 11, 2023, 3:46 PM EDT (19:46 UTC)
- In effect from
- Apr 12, 2023, 11:00 AM EDT
- Expired
- Apr 12, 2023, 9:24 AM EDT
- In force
- Issued by
- NWS Philadelphia/Mount Holly
Counties Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 104 km from the middle of the area, began a volume at 19:49 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
Brookhaven, NY (KOKX), launched 12:00Z, 7.8 hours before the alert went out and 225 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2828 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this fire weather watch 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 fire weather watch went out at Apr 11, 12:29 PM EDT, 3 hours 17 minutes earlier.
Area forecast discussion, Apr 11, 12:29 PM EDT, 3 hours 17 minutes before
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</html>Hazardous weather outlook, Apr 11, 10:45 AM EDT, 5 hours 1 minute 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 |
|---|---|---|---|---|
| Apr 11, 2:48 AM EDT | Small Craft Advisory | PHI | 24 hr |
Nearby
Fire Weather Watches in Pennsylvania, 2023Every fire weather watch in 2023
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.