Alert archive / Pennsylvania / Flash Flood Warnings in 2006
Flash Flood Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 25, 2006, 10:59 PM EDT for Chester 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 outline as issued.
The facts
- Issued
- Jun 25, 2006, 10:59 PM EDT (02:59 UTC)
- Expired
- Jun 26, 2006, 3:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 03:01 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, 3.0 hours before the alert went out and 171 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
- 494 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 720 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 260302
FFWPHI
PAC029-260700-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1059 PM EDT SUN JUN 25 2006
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA
* UNTIL 300 AM EDT
* AT 1055 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM NEAR OXFORD...OR ABOUT 17 MILES
NORTHWEST OF NEWARK...MOVING NORTHEAST AT 30 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEST
GROVE...PARKESBURG...KENNETT SQUARE...COATESVILLE...HONEY BROOK...
DOWNINGTOWN...WEST CHESTER...ELVERSON...LIONVILLE AND PAOLI
RAINFALL AMOUNTS OF 1 TO 1 1/2 INCHES HAVE ALREADY FALLEN IN THE
EXTREME SOUTHWEST CORNER OF THE COUNTY. ADDITIONAL RAINFALL OF 2 TO
4 INCHES IS POSSIBLE IN THE WARNED AREA.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
LAT...LON 3972 7614 3972 7580 4007 7544 4024 7570
4011 7594
$$
RPW1 follow-up statement
000
WGUS71 KPHI 260447
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1240 AM EDT MON JUN 26 2006
PAC029-260700-
CHESTER PA-
1240 AM EDT MON JUN 26 2006
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM EDT FOR
CHESTER COUNTY...
RAIN CONTINUES TO FALL THROUGHOUT THE COUNTY EARLY THIS MORNING.
SOME AREAS HAVE ALREADY RECEIVED AROUND 2 INCHES SINCE THE RAIN
BEGAN BEFORE 11 PM. ADDITIONAL RAINFALL AMOUNTS OF ANOTHER INCH OR
TWO ARE LIKELY AND LOCALLY HIGHER AMOUNTS ARE POSSIBLE, ESPECIALLY
IN ANY THUNDERSTORMS.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
LAT...LON 3972 7614 3972 7580 4007 7544 4024 7570
4011 7594
$$
RPWNearby
Flash Flood Warnings in Pennsylvania, 2006Every flash flood warning in 2006
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.