Alert archive / Pennsylvania / Flash Flood Warnings in 2004
Flash Flood Warning 61, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 1, 2004, 10:59 AM EDT for Delaware County, Montgomery County, Philadelphia 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
- Aug 1, 2004, 10:59 AM EDT (14:59 UTC)
- Expired
- Aug 1, 2004, 1:00 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 15:00 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 3.0 hours before the alert went out and 211 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
- 1100 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 506 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 011503
FFWPHI
PAC045-091-101-011700-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1059 AM EDT SUN AUG 1 2004
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED
THE
* FLASH FLOOD WARNING FOR...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA
* UNTIL 100 PM EDT
* ALL CREEKS AND STREAMS IN THE WARNING AREA HAVE CRESTED...BUT
SEVERAL ARE STILL ABOVE FLOOD STAGE INCLUDING THE FRANKFORD AND
WISSAHICKON CREEKS IN PHILADELPHIA AND CRUM CREEK IN NEWTOWN SQUARE.
A DOPPLER RADAR STORM TOTAL ESTIMATE OF 3 TO 6 INCHES OF RAIN FELL
FROM ROXBOROUGH IN PHILADELPHIA SOUTHWEST THROUGH ARDMORE IN
MONTGOMERY COUNTY THROUGH MEDIA AND CHESTER HEIGHTS IN DELAWARE
COUNTY.
FLOODING IS OCCURRING. 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. NEVER DRIVE AROUND BARRICADES.
DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.
FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.
LAT...LON 3993 7548 3985 7541 4007 7500 4012 7523
4001 7541
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:12 AM EDT | Flash Flood Warning | PHI | Montgomery | 2 hr |
| Aug 1, 7:30 AM EDT | Flash Flood Warning | PHI | Philadelphia | 2 hr |
| Aug 1, 7:43 AM EDT | Flash Flood Warning | PHI | Bucks | 2 hr |
| Aug 1, 7:50 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 115 min |
| Aug 1, 8:01 AM EDT | Flash Flood Warning | PHI | Montgomery | 89 min |
| Aug 1, 9:08 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 2 hr |
| Aug 1, 12:52 PM EDT | Flash Flood Warning | PHI | Delaware, Philadelphia | 4 hr |
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.