Alert archive / Pennsylvania / Flash Flood Warnings in 2009
Flash Flood Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 13, 2009, 2:32 PM EDT for Bucks County, Pennsylvania. It was in force for 2 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 13, 2009, 2:32 PM EDT (18:32 UTC)
- Expired
- Jun 13, 2009, 5:00 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Bucks County, PA
The radar
The Philadelphia radar (KDIX), 63 km from the middle of the area, began a volume at 18:34 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 13, 3:20 PM EDT | FLASH FLOOD | 3 S Doylestown, PA | SEVERAL ROADS CLOSED DUE TO FLOODING IN WARMNISTER TWP. |
| Jun 13, 3:20 PM EDT | FLASH FLOOD | Warminster Heights, PA | SEVERAL ROADS CLOSED DUE TO FLOODING IN WARMINSTER TWP. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.5 hours before the alert went out and 254 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
- 18 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 989 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 38 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 131832
FFWPHI
PAC017-132100-
/O.NEW.KPHI.FF.W.0007.090613T1832Z-090613T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
232 PM EDT SAT JUN 13 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 500 PM EDT
* AT 230 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAINS FROM SEVERAL THUNDERSTORMS THAT ARE MOVING VERY
SLOWLY THROUGH THE COUNTY. RAINFALL WAS FALLING AT A RATE OF TWO TO
TWO AND A HALF INCHES PER HOUR.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GARDENVILLE
AND DOYLESTOWN
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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. MOVE TO HIGHER GROUND.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 4041 7509 4039 7501 4028 7488 4019 7478
4008 7492 4026 7522
$$
EBERWINE1 follow-up statement
000
WGUS71 KPHI 131922
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
322 PM EDT SAT JUN 13 2009
PAC017-132100-
/O.CON.KPHI.FF.W.0007.000000T0000Z-090613T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BUCKS PA-
322 PM EDT SAT JUN 13 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR
SOUTHEASTERN BUCKS COUNTY...
AT 319 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED MANY
FLOODED ROADWAYS IN WARMINSTER AND WARRINGTON TOWNSHIPS. THE HEAVIEST
RAIN ESTIMATED TO BE AROUND FOUR INCHES HAS FALLEN OVER THE LITTLE
NESHAMINY BASIN.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GARDENVILLE AND DOYLESTOWN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
FOLLOW THE INSTRUCTION OF LAW ENFORCEMENT PERSONNEL IN YOUR AREA
AND NEVER DRIVE AROUND BARRICADES.
&&
LAT...LON 4041 7509 4039 7501 4028 7488 4019 7478
4008 7492 4026 7522
$$
GIGIThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 2:27 PM EDT | Areal Flood Advisory | PHI | Chester | 4 hr |
| Jun 13, 2:33 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 112 min |
| Jun 13, 2:57 PM EDT | Flash Flood Warning | PHI | Montgomery | 2 hr |
| Jun 13, 3:17 PM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jun 13, 4:07 PM EDT | Flash Flood Warning | PHI | Bucks, Montgomery, Philadelphia | 6 hr |
| Jun 13, 4:59 PM EDT | Areal Flood Advisory | PHI | Chester | 4 hr |
| Jun 13, 5:16 PM EDT | River Flood Warning | PHI | Bucks | 13 hr |
| Jun 13, 6:06 PM EDT | Flash Flood Warning | PHI | Chester | 2 hr |
| Jun 13, 6:39 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 66 min |
| Jun 13, 7:29 PM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 61 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2009Every flash flood warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.