Alert archive / Delaware / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 273, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Nov 15, 2008, 5:38 PM EST for Kent County, Sussex County, Delaware. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Nov 15, 2008, 5:38 PM EST (22:38 UTC)
- Expired
- Nov 15, 2008, 6:45 PM EST
- In force
- 67 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE
The radar
The Dover AFB radar (KDOX), 12 km from the middle of the area, began a volume at 22:40 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Nov 15, 12:22 PM EST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.6 hours before the alert went out and 108 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
- 56 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 794 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 258 m²/s²
- 0-3 km storm-relative helicity
- 267 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 152238
SVRPHI
DEC001-005-152345-
/O.NEW.KPHI.SV.W.0273.081115T2238Z-081115T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
538 PM EST SAT NOV 15 2008
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN KENT COUNTY IN CENTRAL DELAWARE...
SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 645 PM EST
* AT 534 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS. THESE STORMS WERE LOCATED ALONG A
LINE EXTENDING FROM WOODLAND BEACH TO SEAFORD...OR ALONG A LINE
EXTENDING FROM 10 MILES NORTH OF DOVER TO 16 MILES WEST OF
GEORGETOWN...AND MOVING EAST AT 40 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
BOWERS BY 545 PM...
SYCAMORE...MILFORD AND ELLENDALE BY 550 PM...
BIG STONE BEACH AND GEORGETOWN BY 555 PM...
SLAUGHTER BEACH AND MILTON BY 600 PM...
MILLSBORO BY 605 PM...
LEWES BY 615 PM...
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITH SOME
THUNDERSTORMS IN THIS LINE. WHILE NOT IMMEDIATELY LIKELY...A TORNADO
MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO
A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR
SMALL INTERIOR ROOM.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM SATURDAY EVENING FOR
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 900 PM SATURDAY EVENING FOR NORTHWESTERN NEW JERSEY AND
NORTHEASTERN PENNSYLVANIA.
LAT...LON 3859 7571 3873 7571 3936 7550 3932 7543
3924 7539 3908 7539 3903 7533 3898 7529
3892 7530 3882 7519 3879 7514 3881 7509
3879 7507 3852 7504
TIME...MOT...LOC 2238Z 261DEG 33KT 3930 7544 3863 7562
$$
TFG1 follow-up statement
000
WWUS51 KPHI 152304
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
604 PM EST SAT NOV 15 2008
DEC001-152314-
/O.CAN.KPHI.SV.W.0273.000000T0000Z-081115T2345Z/
KENT DE-
604 PM EST SAT NOV 15 2008
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN KENT COUNTY IS
CANCELLED...
THE LINE OF THUNDERSTORMS HAS MOVED INTO DELAWARE BAY.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM EST SATURDAY EVENING
FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 900 PM EST SATURDAY EVENING FOR NORTHWESTERN NEW JERSEY AND
NORTHEASTERN PENNSYLVANIA.
LAT...LON 3859 7571 3869 7555 3892 7543 3893 7540
3896 7539 3894 7530 3892 7530 3879 7514
3879 7511 3881 7509 3879 7507 3860 7504
3852 7504
TIME...MOT...LOC 2304Z 261DEG 33KT 3933 7513 3862 7546
$$
DEC005-152345-
/O.CON.KPHI.SV.W.0273.000000T0000Z-081115T2345Z/
SUSSEX DE-
604 PM EST SAT NOV 15 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EST
FOR SUSSEX COUNTY...
AT 603 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS. THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 30 MILES NORTH OF SLAUGHTER BEACH TO
SYCAMORE...OR ALONG A LINE EXTENDING FROM 6 MILES SOUTHWEST OF
MILLVILLE NEW JERSEY TO 7 MILES SOUTHWEST OF GEORGETOWN...MOVING
EAST AT 40 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
MILTON BY 610 PM EST...
DAGSBORO AND MILLSBORO BY 620 PM EST...
LEWES BY 625 PM EST...
OCEAN VIEW...MILLVILLE AND LONG NECK BY 630 PM EST...
BETHANY BEACH...REHOBOTH BEACH AND HENLOPEN ACRES BY 635 PM EST...
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM EST SATURDAY EVENING
FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEASTERN PENNSYLVANIA. A TORNADO WATCH ALSO REMAINS IN EFFECT
UNTIL 900 PM EST SATURDAY EVENING FOR NORTHWESTERN NEW JERSEY AND
NORTHEASTERN PENNSYLVANIA.
LAT...LON 3859 7571 3869 7555 3892 7543 3893 7540
3896 7539 3894 7530 3892 7530 3879 7514
3879 7511 3881 7509 3879 7507 3860 7504
3852 7504
TIME...MOT...LOC 2304Z 261DEG 33KT 3933 7513 3862 7546
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 15, 4:15 PM EST | Severe Thunderstorm Warning | PHI | New Castle | 30 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.