Alert archive / Pennsylvania / Flash Flood Warnings in 2001
Flash Flood Warning 38, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 4, 2001, 7:19 PM EDT for Burlington County, New Jersey; Bucks County, Philadelphia County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 4, 2001, 7:19 PM EDT (23:19 UTC)
- Expired
- Aug 4, 2001, 10:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Burlington County, NJ, Bucks County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 50 km from the middle of the area, began a volume at 23:21 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, 11.3 hours before the alert went out and 199 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
- 328 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- -14 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 042325 CCA FFWPHI NJC005-PAC017-101-050215- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORRECTED NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 719 PM EDT SAT AUG 4 2001 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... EXTREME SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA NORTHEASTERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY * UNTIL 1015 PM EDT. * AT 716 PM EDT...WEATHER SERVICE RADAR INDICATED SLOW MOVING THUNDERSTORMS THAT HAVE DROPPED UP TO THREE INCHES OF RAIN WITHIN ONE HOUR IN FAR WESTERN BURLINGTON COUNTY AND ADJACENT PARTS OF BUCKS COUNTY. BEVERLY POLICE IN BURLINGTON COUNTY REPORTED WIDESPREAD FLOODING. SEVERE FLOODING WAS REPORTED ON U.S. ROUTE 13 IN FALLS TOWNSHIP IN BUCKS COUNTY. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. 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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE TELEVISION OUTLET. $$ LAT...LON 4016 7478 4000 7485 3995 7499 4003 7512
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 4:42 PM EDT | Flash Flood Warning | PHI | Ocean | 2 hr |
| Aug 4, 4:56 PM EDT | Flash Flood Warning | PHI | Monmouth | 2 hr |
| Aug 4, 6:42 PM EDT | Flash Flood Warning | PHI | Monmouth | 2 hr |
| Aug 4, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 66 min |
| Aug 4, 7:29 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery | 61 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2001Flash Flood Warnings in New Jersey, 2001Every flash flood warning in 2001
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.