Alert archive / Pennsylvania / Flash Flood Warnings in 1996
Flash Flood Warning 79, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 24, 1996, 2:20 AM EDT for Philadelphia County, Pennsylvania; Burlington County, New Jersey. It was in force for 115 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 24, 1996, 2:20 AM EDT (06:20 UTC)
- Expired
- Aug 24, 1996, 4:15 AM EDT
- In force
- 115 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
Counties Burlington County, NJ, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 42 km from the middle of the area, began a volume at 06:21 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 00:00Z, 6.3 hours before the alert went out and 201 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
- 311 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 1174 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPHL 240620 FFWPHL NJC005-PAC101-240815- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ 220 AM EDT SAT AUG 24 1996 THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 415 AM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NEW JERSEY ...BURLINGTON COUNTY IN PENNSYLVANIA ...PHILADELPHIA COUNTY AT 220 AM EDT NATIONAL WEATHER SERVICE RADAR INDICATED THAT VERY HEAVY RAIN WAS FALLING OVER PHILADELPHIA AND BURLINGTON COUNTIES. AMOUNTS IN EXCESS OF 2 INCHES IS POSSIBLE IN A VERY SHORT PERIOD OF TIME. DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE DEPTH OF THE WATER MAY BE HIGHER THAN YOU THINK. RAPIDLY RISING WATERS CAN QUICKLY ENGULF YOUR VEHICLE AND ITS OCCUPANTS...WASHING THEM AWAY. REMEMBER...MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. MR
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 11:12 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 33 min |
| Aug 23, 11:15 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 60 min |
| Aug 23, 11:19 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Montgomery | 56 min |
| Aug 23, 11:28 PM EDT | Flash Flood Warning | PHI | Bucks | 2 hr |
| Aug 23, 11:28 PM EDT | Flash Flood Warning | PHI | Chester | 2 hr |
| Aug 24, 1:03 AM EDT | Flash Flood Warning | PHI | Chester | 57 min |
| Aug 24, 1:03 AM EDT | Severe Thunderstorm Warning | PHI | Chester | 57 min |
| Aug 24, 12:20 AM EDT | Flash Flood Warning | PHI | Mercer | 115 min |
| Aug 24, 2:08 AM EDT | Severe Thunderstorm Warning | PHI | Burlington | 67 min |
Nearby
Flash Flood Warnings in Pennsylvania, 1996Flash Flood Warnings in New Jersey, 1996Every flash flood warning in 1996
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.