Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 149, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2004, 7:10 PM EDT for Bucks County, Pennsylvania. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2004, 7:10 PM EDT (23:10 UTC)
- Expired
- Jul 28, 2004, 8:00 PM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Bucks County, PA
The radar
The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 23:13 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.2 hours before the alert went out and 124 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
- 112 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 752 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 282310 SVRPHI PAC017-290000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 709 PM EDT WED JUL 28 2004 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA. * UNTIL 800 PM EDT * AT 704 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR CHALFONT...OR ABOUT 18 MILES NORTH OF PHILADELPHIA...AND MOVING EAST AT 20 MPH. RADAR INDICATED THIS STORM WAS GENERATING WINDS APPROACHING 60 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... IVYLAND BY 720 PM EDT... RICHBORO BY 730 PM EDT... NEWTOWN BY 740 PM EDT... WOODSIDE BY 750 PM EDT... LAT...LON 4036 7535 4019 7508 4020 7481 4042 7506 $$ MPD
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 9:37 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 38 min |
| Jul 27, 9:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 36 min |
| Jul 27, 10:44 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 28, 2:28 AM EDT | Flash Flood Warning | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jul 28, 7:00 PM EDT | Flash Flood Warning | PHI | Montgomery | 2 hr |
| Jul 28, 7:21 PM EDT | Flash Flood Warning | PHI | Bucks | 114 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2004Every severe thunderstorm warning in 2004
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.