Alert archive / Pennsylvania / Flash Flood Warnings in 2001
Flash Flood Warning 13, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 16, 2001, 8:15 PM EDT for Chester County, Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware. It was in force for 6 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, 8:15 PM EDT (00:15 UTC)
- Expired
- Jun 17, 2001, 2:15 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties New Castle County, DE, Chester County, PA, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 92 km from the middle of the area, began a volume at 00:19 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 00:00Z, 0.3 hours before the alert went out and 194 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
- 489 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 617 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 69 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 170015
FFWPHI
DEC003-PAC029-045-101-170615-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
815 PM EDT SAT JUN 16 2001
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE
SOUTHEASTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA
* UNTIL 215 AM EDT.
* AT 810 PM EDT...NATIONAL WEATHER SERVICE RADAR SHOWED AREAS OF
HEAVY RAIN CONTINUING ACROSS THE REGION...WITH ESTIMATES AND GROUND
TRUTH OF OVER 4 INCHES IN SOME SPOTS. MORE SHOWERS AND THUNDERSTORMS
ARE EXPECTED THROUGH THE REST OF THE EVENING...WHICH WILL ONLY
EXACERBATE THE FLOODING SITUATION. STREET FLOODING HAS BEEN
REPORTED...WITH SEVERAL RESCUES FROM FLOODED AUTOMOBILES.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.
$$
LAT...LON 4010 7501 4004 7500 3995 7518 3989 7516
3983 7544 3955 7567 3975 7575 3976 7592
4009 7551 3996 7527$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 6:05 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, 2001Flash Flood Warnings in Delaware, 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.