Alert archive / Pennsylvania / Flash Flood Warnings in 2009
Flash Flood Warning 58, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 28, 2009, 9:16 AM EDT for Bucks County, Lehigh County, Northampton 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
- Aug 28, 2009, 9:16 AM EDT (13:16 UTC)
- Expired
- Aug 28, 2009, 1:15 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bucks County, PA, Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 99 km from the middle of the area, began a volume at 13:15 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 12:00Z, 1.3 hours before the alert went out and 207 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1046 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 24 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 281316
FFWPHI
PAC017-077-095-281715-
/O.NEW.KPHI.FF.W.0058.090828T1316Z-090828T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
916 AM EDT FRI AUG 28 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
SOUTH CENTRAL NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
NORTHWESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 115 PM EDT
* AT 906 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN ACROSS BERKS AND LANCASTER COUNTIES. THIS RAIN WAS
MOVING NORTHEAST. AN ADDITIONAL ONE TO TWO INCHES OF RAIN IS
POSSIBLE OVER THE NEXT FEW HOURS ACROSS THE WARNED AREA. THIS IS
IN ADDITION TO THE TWO TO ALMOST FOUR INCHES THAT FELL IN SPOTS
EARLIER THIS MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
DELAWARE RIVER...LEHIGH RIVER...EAST BRANCH SAUCON CREEK...CEDAR
CREEK...JORDAN CREEK...SAUCON CREEK...IRON RUN...COOKS CREEK...LITTLE
LEHIGH CREEK...SCHAEFER RUN...GALLOWS RUN...RAPP CREEK...TUMBLE
BROOK...HAYCOCK CREEK...UNAMI CREEK...SWABIA CREEK...DIMPLE CREEK...
TOHICKON CREEK...HOSENSACK CREEK...PERKIOMEN CREEK...BEAVER RUN...
SCHMOUTZ CREEK...MACOBY CREEK AND STONY RUN.
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.
&&
LAT...LON 4058 7519 4056 7519 4055 7517 4052 7514
4040 7547 4054 7568 4062 7523
$$
KRUZDLOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 9:42 AM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Lehigh, Montgomery, Northampton | 2 hr |
| Aug 28, 2:52 PM EDT | Flash Flood Watch | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 14 hr |
| Aug 28, 3:13 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.