Alert archive / Pennsylvania / Flash Flood Warnings in 2001
Flash Flood Warning 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 16, 2001, 6:30 PM EDT for Montgomery 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 counties it named.
The facts
- Issued
- Jun 16, 2001, 6:30 PM EDT (22:30 UTC)
- Expired
- Jun 16, 2001, 8:30 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 86 km from the middle of the area, began a volume at 22:31 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, 10.5 hours before the alert went out and 224 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
- 596 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 518 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 21 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 162231
FFWPHI
PAC091-170030-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
630 PM EDT SAT JUN 16 2001
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA
* UNTIL 830 PM EDT.
* AT 625 PM EDT...WEATHER SERVICE RADAR INDICATED ADDITIONAL SHOWERS
AND THUNDERSTORMS WITH HEAVY RAIN MOVING INTO THE COUNTY FROM THE
SOUTHEAST. THIS WILL ONLY EXACERBATE THE ALREADY DRENCHED
CONDITIONS...AS RADAR HAS ESTIMATED OVER 4 INCHES ALREADY HAVING
FALLEN IN PARTS OF THE 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 4014 7505 4006 7512 4012 7520 4008 7527
4028 7565 4042 7554The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 2:28 PM EDT | Flash Flood Warning | PHI | Montgomery | 2 hr |
| Jun 16, 4:30 PM EDT | Flash Flood Warning | PHI | Montgomery | 90 min |
| Jun 16, 5:31 PM EDT | Flash Flood Warning | PHI | Bucks | 3 hr |
| Jun 16, 6:40 PM EDT | Flash Flood Warning | PHI | Delaware | 2 hr |
| Jun 16, 7:12 PM EDT | Flash Flood Warning | PHI | Philadelphia | 2 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 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.