Alert archive / Delaware / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 252, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 15, 2008, 3:11 PM EDT for Sussex County, Delaware. It was in force for 64 min. 2 reports 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
- Aug 15, 2008, 3:11 PM EDT (19:11 UTC)
- Expired
- Aug 15, 2008, 4:15 PM EDT
- In force
- 64 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Sussex County, DE
The radar
The Dover AFB radar (KDOX), 30 km from the middle of the area, began a volume at 19:13 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 |
|---|---|---|---|
| Aug 15, 3:20 PM EDT | HAIL 0.88 | Rehoboth Beach, DE | NICKEL SIZE HAIL REPORTED IN REHOBOTH BEACH. |
| Aug 15, 3:20 PM EDT | HAIL 0.88 | Rehoboth Beach, DE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.2 hours before the alert went out and 92 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
WUUS51 KPHI 151911
SVRPHI
DEC005-152015-
/O.NEW.KPHI.SV.W.0252.080815T1911Z-080815T2015Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
311 PM EDT FRI AUG 15 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 415 PM EDT
* AT 308 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR
REHOBOTH BEACH...OR ABOUT 16 MILES EAST OF GEORGETOWN...AND MOVING
EAST AT 8 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
REHOBOTH BEACH BY 320 PM...
THUNDERSTORMS ARE CAPABLE OF PRODUCING HEAVY RAINFALL WHICH MAY
RESULT IN LOCALIZED AREAS OF FLOODING. DO NOT DRIVE IN AREAS WHERE
WATER IS CROSSING THE ROAD.
LAT...LON 3863 7522 3881 7522 3882 7518 3879 7514
3879 7511 3881 7509 3879 7507 3872 7507
3866 7505 3866 7506 3861 7505
TIME...MOT...LOC 1910Z 269DEG 7KT 3873 7510
$$
SZATKOWSKI1 follow-up statement
000
WWUS51 KPHI 151930
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
330 PM EDT FRI AUG 15 2008
DEC005-152015-
/O.CON.KPHI.SV.W.0252.000000T0000Z-080815T2015Z/
SUSSEX DE-
330 PM EDT FRI AUG 15 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR EAST CENTRAL SUSSEX COUNTY...
AT 320 PM EDT...A TRAINED WEATHER SPOTTER REPORTED NICKEL SIZE HAIL
IN REHOBOTH BEACH. THIS SEVERE STORM WAS LOCATED NEAR REHOBOTH
BEACH...OR 16 MILES EAST OF GEORGETOWN...MOVING EAST AT 7 MPH. THIS
STORM HAS THE POTENTIAL TO ALSO PRODUCE DAMAGING WINDS TO 60 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
DEWEY BEACH BY 335 PM EDT...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
LAT...LON 3863 7522 3881 7522 3882 7518 3879 7514
3879 7511 3881 7509 3879 7507 3872 7507
3866 7505 3866 7506 3861 7505
TIME...MOT...LOC 1928Z 287DEG 6KT 3870 7509
$$
GORSEThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 3:42 PM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| 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
Severe Thunderstorm Warnings in Delaware, 2008Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.