Alert archive / Pennsylvania / Flash Flood Warnings in 2003
Flash Flood Warning 44, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 15, 2003, 8:18 AM EDT for Berks 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
- Sep 15, 2003, 8:18 AM EDT (12:18 UTC)
- Expired
- Sep 15, 2003, 12:15 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Berks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 113 km from the middle of the area, began a volume at 12:17 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 0.3 hours before the alert went out and 101 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
- 364 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 151221
FFWPHI
PAC011-091-151615-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
818 AM EDT MON SEP 15 2003
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN BERKS COUNTY
NORTHWESTERN MONTGOMERY COUNTY
* UNTIL 1215 PM EDT.
* AT 811 AM EDT...WEATHER SERVICE RADAR INDICATED THAT TWO TO FOUR
INCHES OF RAIN HAS FALLEN SO FAR ACROSS THE WARNED AREA AND CREEKS
ARE RISING RAPIDLY. FLOODING HAS JUST STARTED ALONG THE MANATAWNY
CREEK IN POTTSTOWN AND MORE STREAMS ARE EXPECTED TO FLOOD IN THE
AREA. DOPPLER RADAR INDICATED THAT MORE HEAVY RAIN IS EXPECTED
ACROSS THE REGION AND THIS WILL ONLY EXACERBATE THE ONGOING FLOODING.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.
NEVER EVER DRIVE AROUND BARRICADES.
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 4034 7535 4013 7545 4013 7552 4019 7557
4025 7567 4017 7583 4018 7597 4056 7572
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 6:07 AM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Sep 15, 8:47 AM EDT | Flash Flood Warning | PHI | Chester | 6 hr |
| Sep 15, 12:10 PM EDT | Flash Flood Warning | PHI | Berks | 4 hr |
| Sep 15, 3:24 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 6 hr |
| Sep 15, 5:19 PM EDT | Flash Flood Warning | PHI | Chester | 6 hr |
| Sep 15, 6:33 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Northampton | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2003Every flash flood warning in 2003
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.