Alert archive / Pennsylvania / Flash Flood Warnings in 2004
Flash Flood Warning 96, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 28, 2004, 4:16 PM EDT for 5 counties in Pennsylvania. It was in force for 3 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
- Sep 28, 2004, 4:16 PM EDT (20:16 UTC)
- Expired
- Sep 28, 2004, 7:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Berks County, PA, Bucks County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 107 km from the middle of the area, began a volume at 20:19 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 116 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
- 95 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 631 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 109 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 282019
FFWPHI
PAC011-017-077-091-095-282315-
/X.NEW.KPHI.FF.W.0015.040928T2016Z-040928T2315Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
416 PM EDT TUE SEP 28 2004
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BERKS COUNTY IN EASTERN PENNSYLVANIA
LEHIGH COUNTY IN EASTERN PENNSYLVANIA
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA
BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA
MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA
* UNTIL 715 PM EDT
* AT 415 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LARGE AREA OF LIGHT TO MODERATE RAIN OVER THE WARNED AREA.
IN ADDITION...A NARROW BAND OF HEAVIER RAIN IS MOVING IN FROM THE
SOUTH. RAINFALL RATES OF UP TO AN INCH AN HOUR HAS BEEN REPORTED
IN THE BAND OF HEAVIER RAIN.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WIND GAP...
EAST BANGOR...ALLENTOWN...READING...DOYLESTOWN...AND POTTSTOWN.
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. ESPECIALLY VULNERABLE ARE THOSE STREAMS
WHICH EXPERIENCED RISES EARLIER TODAY.
LAT...LON 4043 7623 4029 7596 4026 7557 4006 7531
4017 7481 4045 7511 4070 7522 4093 7515
$$
JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 12:48 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Sep 28, 3:55 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Sep 28, 4:41 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 79 min |
| Sep 28, 4:55 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| Sep 28, 5:11 PM EDT | Flash Flood Warning | PHI | Philadelphia | 3 hr |
| Sep 28, 6:05 PM EDT | Special Marine Warning | PHI | 115 min | |
| Sep 28, 6:47 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Sep 28, 7:11 PM EDT | Flash Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 6 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2004Every flash flood warning in 2004
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.