Alert archive / Pennsylvania / Flash Flood Warnings in 2007
Flash Flood Warning 21, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 12, 2007, 5:46 PM EDT for Bucks County, Pennsylvania. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 12, 2007, 5:46 PM EDT (21:46 UTC)
- Expired
- Jun 12, 2007, 7:45 PM EDT
- In force
- 119 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Bucks County, PA
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.8 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
- 186 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 1120 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 34 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 122147 FFWPHI PAC017-122345- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 546 PM EDT TUE JUN 12 2007 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 745 PM EDT * AT 544 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM PERSISTENT AFTERNOON THUNDERSTORMS OVER THE WARNED AREA. AS MUCH AS 3 INCHES OF RAIN MAY HAVE FALLEN OVER PARTS OF LOWER BUCKS COUNTY SINCE 3:00 PM. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODSIDE... RICHBORO...NEWTOWN...LEVITTOWN...LANGHORNE...IVYLAND AND FEASTERVILLE 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. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. LAT...LON 4018 7480 4034 7498 4023 7513 4008 7493 $$ JRP
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 12:56 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 64 min |
| Jun 12, 1:12 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh | 26 min |
| Jun 12, 1:18 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 42 min |
| Jun 12, 2:00 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Lehigh, Northampton | 30 min |
| Jun 12, 2:15 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 30 min |
| Jun 12, 2:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 35 min |
| Jun 12, 2:48 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 42 min |
| Jun 12, 3:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery, Philadelphia | 40 min |
| Jun 12, 4:00 PM EDT | Flash Flood Warning | PHI | Montgomery | 3 hr |
| Jun 12, 4:08 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 37 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2007Every flash flood warning in 2007
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.