Alert archive / Delaware / Flash Flood Warnings in 2013
Flash Flood Warning 52, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 9, 2013, 7:40 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 9, 2013, 7:40 PM EDT (23:40 UTC)
- Expired
- Aug 9, 2013, 11:30 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), 31 km from the middle of the area, began a volume at 23:40 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, 11.7 hours before the alert went out and 76 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
- 295 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1059 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
558
WGUS51 KPHI 092340
FFWPHI
DEC005-100330-
/O.NEW.KPHI.FF.W.0052.130809T2340Z-130810T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
740 PM EDT FRI AUG 9 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SUSSEX COUNTY...
* UNTIL 1130 PM EDT...
* AT 734 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
OVER TWO INCHES OF RAIN HAS FALLEN IN CENTRAL DELAWARE NEAR
GEORGETOWN IN LESS THAN ONE HOUR. ADDITIONAL RAIN IS EXPECTED FOR
THE NEXT HOUR OR SO...WHICH COULD RESULT IN FLOODING OF LOW LYING
AREAS.
* LOCATIONS IN THE WARNING INCLUDE GEORGETOWN AND SEAFORD.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
NEVER ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN
DEPTH BY FOOT OR IN AN AUTOMOBILE. TURN AROUND DON'T DROWN!
&&
LAT...LON 3846 7569 3876 7570 3876 7508 3868 7506
3863 7506 3863 7505 3860 7506 3860 7505
3859 7506 3845 7504
$$
FORECASTER:JJM1 follow-up statement
290
WGUS71 KPHI 100156
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
956 PM EDT FRI AUG 9 2013
DEC005-100207-
/O.CAN.KPHI.FF.W.0052.000000T0000Z-130810T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX DE-
956 PM EDT FRI AUG 9 2013
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SUSSEX COUNTY...
THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
NO LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 3846 7569 3876 7570 3876 7508 3868 7506
3863 7506 3863 7505 3860 7506 3860 7505
3859 7506 3845 7504
$$
FORECASTER:JJMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:03 PM EDT | Special Weather Statement | PHI | Sussex | 57 min |
Nearby
Flash Flood Warnings in Delaware, 2013Every flash flood warning in 2013
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.