Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 138, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2004, 5:44 PM EDT for Bucks County, Pennsylvania. It was in force for 61 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 14, 2004, 5:44 PM EDT (21:44 UTC)
- Expired
- Jul 14, 2004, 6:45 PM EDT
- In force
- 61 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), 48 km from the middle of the area, began a volume at 21:47 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, 9.7 hours before the alert went out and 128 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
- 3 J/kg
- Mixed-layer CIN
- -233 J/kg
- Mixed-layer LCL
- 719 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 125 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 142144
SVRPHI
PAC017-142245-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
544 PM EDT WED JUL 14 2004
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA
* UNTIL 645 PM EDT
* AT 542 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
IVYLAND...AND MOVING SOUTHEAST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
LANGHORNE AND WOODSIDE BY 550 PM EDT...
LEVITTOWN AND BRISTOL BY 555 PM EDT...
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
LAT...LON 4025 7486 4017 7473 4014 7473 4012 7475
4012 7482 4007 7490 4008 7496 4011 7496
4013 7499 4019 7511 4030 7507
$$
IOVINOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 2:22 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 53 min |
| Jul 14, 3:05 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 76 days |
| Jul 14, 3:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| Jul 14, 4:10 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 65 min |
| Jul 14, 4:24 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 66 min |
| Jul 14, 4:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 61 min |
| Jul 14, 5:01 PM EDT | Tornado Warning | PHI | Montgomery | 29 min |
| Jul 14, 5:17 PM EDT | Special Marine Warning | PHI | 103 min | |
| Jul 14, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 64 min |
| Jul 14, 5:51 PM EDT | Flash Flood Warning | PHI | Bucks | 2 hr |
| Jul 14, 6:01 PM EDT | Special Marine Warning | PHI | 74 min | |
| Jul 14, 6:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 14, 6:39 PM EDT | Special Marine Warning | PHI | 66 min | |
| Jul 14, 6:46 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 14, 7:00 PM EDT | Special Marine Warning | PHI | 60 min | |
| Jul 14, 7:38 PM EDT | Special Marine Warning | PHI | 82 min | |
| Jul 14, 7:38 PM EDT | Special Marine Warning | PHI | 82 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.