Alert archive / Delaware / Flash Flood Warnings in 2008
Flash Flood Warning 31, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 15, 2008, 3:42 PM EDT for Sussex County, Delaware. 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 15, 2008, 3:42 PM EDT (19:42 UTC)
- Expired
- Aug 15, 2008, 7:47 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 28 km from the middle of the area, began a volume at 19:43 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.7 hours before the alert went out and 90 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
- 1087 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KPHI 151942
FFWPHI
DEC005-160045-
/O.NEW.KPHI.FF.W.0031.080815T1942Z-080816T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
342 PM EDT FRI AUG 15 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 845 PM EDT
* AT 339 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH
FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO REHOBOTH
BEACH AND LEWES
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 3858 7539 3878 7524 3880 7516 3879 7514
3879 7511 3881 7509 3880 7508 3874 7506
3872 7507 3866 7505 3866 7506 3855 7505
$$
SZATKOWSKI1 follow-up statement
000
WGUS71 KPHI 152347
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
747 PM EDT FRI AUG 15 2008
DEC005-152357-
/O.CAN.KPHI.FF.W.0031.000000T0000Z-080816T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX DE-
747 PM EDT FRI AUG 15 2008
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL SUSSEX
COUNTY...
THE STORMS HAVE MOVED OUT OF THE WARNING AREA AND RAINFALL HAS
ENDED.
LAT...LON 3858 7539 3878 7524 3880 7516 3879 7514
3879 7511 3881 7509 3880 7508 3874 7506
3872 7507 3866 7505 3866 7506 3855 7505
$$
SZATKOWSKIThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 3:11 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 64 min |
| Aug 15, 4:16 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 74 min |
| Aug 15, 5:24 PM EDT | Flash Flood Warning | PHI | Sussex | 2 hr |
Nearby
Flash Flood Warnings in Delaware, 2008Every flash flood warning in 2008
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.