Alert archive / Pennsylvania / Flash Flood Warnings in 2004
Flash Flood Warning 27, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 14, 2004, 5:51 PM EDT for Bucks County, Pennsylvania. It was in force for 2 hr. 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, 5:51 PM EDT (21:51 UTC)
- Expired
- Jul 14, 2004, 8:00 PM EDT
- In force
- 2 hr
- 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), 77 km from the middle of the area, began a volume at 21:51 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, 9.9 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
- 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 WGUS51 KPHI 142157 CCA FFWPHI PAC017-150000- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORRECTION NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 551 PM EDT WED JUL 14 2004 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA * UNTIL 800 PM EDT * AT 547 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT OVER TWO INCHES OF RAIN HAS FALLEN SO FAR OVER CENTRAL BUCKS COUNTY AND ADDITIONAL HEAVY RAIN DURING THE NEXT HOUR SHOULD CAUSE FLOODING OF SMALL STREAMS. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES... DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. LAT...LON 4034 7533 4023 7513 4028 7496 4043 7508 $$ TFG
The 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, 5:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 61 min |
| 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
Flash Flood Warnings in Pennsylvania, 2004Every flash flood 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.