Alert archive / Pennsylvania / Flash Flood Warnings in 2001
Flash Flood Warning 17, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 17, 2001, 6:05 AM EDT for Bucks County, Montgomery County, Pennsylvania. It was in force for 4 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 17, 2001, 6:05 AM EDT (10:05 UTC)
- Expired
- Jun 17, 2001, 10:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 79 km from the middle of the area, began a volume at 10:07 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 00:00Z, 10.1 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
- 516 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 52 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 171008 FFWPHI PAC017-091-171400- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 605 AM EDT SUN JUN 17 2001 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA * UNTIL 1000 AM EDT. * AT 600 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED ADDITIONAL MODERATE TO HEAVY RAIN MOVING INTO BUCKS COUNTY AND MONTGOMERY COUNTY FROM THE EAST. HEAVY RAINFALL...IN EXCESS OF 6 INCHES... HAS ALREADY FALLEN OVER A LARGE PART OF THE TWO COUNTIES SINCE SATURDAY AFTERNOON. 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 4017 7475 4009 7535 4027 7563 4055 7526 IOVINO/NATIONAL WEATHER SERVICE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 8:15 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 6 hr |
| Jun 16, 8:18 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 6 hr |
| Jun 17, 2:10 AM EDT | Flash Flood Warning | PHI | Bucks, Montgomery | 4 hr |
| Jun 17, 6:45 AM EDT | Flash Flood Warning | PHI | Philadelphia | 3 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.