Alert archive / Pennsylvania / Flash Flood Warnings in 2006
Flash Flood Warning 61, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 28, 2006, 12:40 AM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 3 hr. 1 report 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
- Jul 28, 2006, 12:40 AM EDT (04:40 UTC)
- Expired
- Jul 28, 2006, 3:45 AM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 60 km from the middle of the area, began a volume at 04:42 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 |
|---|---|---|---|
| Jul 28, 1:15 AM EDT | FLASH FLOOD | Norristown, PA | ROAD AND BASEMENT FLOODING |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 4.7 hours before the alert went out and 208 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
- 874 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 789 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 135 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 280441
FFWPHI
PAC017-091-101-280745-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1240 AM EDT FRI JUL 28 2006
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA
SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA
THIS INCLUDES THE CITY OF PHILADELPHIA
* UNTIL 345 AM EDT
* AT 1238 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED FLASH FLOODING WAS IMMINENT FROM SEVERAL THUNDERTORMS
OVER AND APPROACHING THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WOODSIDE...
WILLOW GROVE...RICHBORO...PLYMOUTH MEETING...NORRISTOWN...
NEWTOWN...LEVITTOWN...LANGHORNE...IVYLAND...FEASTERVILLE AND AMBLER
UP TO TWO INCHES OF RAINFALL HAS OCCURRED OVER THE WARNED AREA...AND
ADDITIONAL RAINFALL AMOUNTS OF AROUND TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.
LAT...LON 3991 7519 4003 7502 4016 7476 4035 7499
4010 7539
$$
EBERWINE/MPD1 follow-up statement
000
WGUS71 KPHI 280655
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
256 AM EDT FRI JUL 28 2006
PAC017-091-101-280706-
PHILADELPHIA PA-MONTGOMERY PA-BUCKS PA-
256 AM EDT FRI JUL 28 2006
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN BUCKS...SOUTHEASTERN
MONTGOMERY AND PHILADELPHIA COUNTIES IS CANCELLED...
LAT...LON 3991 7519 4003 7502 4016 7476 4035 7499
4010 7539
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 10:55 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 65 min |
| Jul 27, 11:32 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Montgomery | 88 min |
| Jul 28, 12:32 AM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 43 min |
| Jul 28, 12:40 AM EDT | Severe Thunderstorm Warning | PHI | Bucks | 65 min |
| Jul 28, 2:28 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 62 min |
| Jul 28, 2:49 PM EDT | Severe Thunderstorm Warning | PHI | Philadelphia | 56 min |
| Jul 28, 3:07 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 53 min |
| Jul 28, 4:03 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 57 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2006Every flash flood warning in 2006
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.