Alert archive / Delaware / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 120, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Dec 24, 2015, 8:36 AM EST for Kent County, Sussex County, Delaware. It was in force for 24 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
- Dec 24, 2015, 8:36 AM EST (13:36 UTC)
- Expired
- Dec 24, 2015, 9:00 AM EST
- In force
- 24 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), 32 km from the middle of the area, began a volume at 13:38 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, 1.6 hours before the alert went out and 132 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
- 38 J/kg
- Mixed-layer CIN
- -180 J/kg
- Mixed-layer LCL
- 938 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 172 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
591
WUUS51 KPHI 241336
SVRPHI
DEC001-005-241400-
/O.NEW.KPHI.SV.W.0120.151224T1336Z-151224T1400Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
836 AM EST THU DEC 24 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
KENT COUNTY IN CENTRAL DELAWARE...
NORTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
* UNTIL 900 AM EST
* AT 836 AM EST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED NEAR VIOLA...OR 10 MILES SOUTHWEST OF DOVER...AND
MOVING EAST AT 70 MPH.
* LOCATIONS IMPACTED INCLUDE...
DOVER...MILFORD...HARRINGTON...CAMDEN...CHESWOLD...BOWERS...
WOODSIDE...VIOLA...HARTLY...ANDREWSVILLE...RISING SUN...
HAZLETTVILLE...DOVER SPEEDWAY...DOVER BASE HOUSING...SANDTOWN...
RISING SUN-LEBANON...BIG STONE BEACH...WYOMING...FELTON AND
FREDERICA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.
&&
LAT...LON 3920 7575 3925 7552 3926 7549 3928 7542
3921 7540 3915 7541 3911 7540 3907 7541
3901 7533 3896 7531 3894 7535 3882 7572
TIME...MOT...LOC 1336Z 247DEG 59KT 3905 7565
$$
PO1 follow-up statement
830
WWUS51 KPHI 241354
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
854 AM EST THU DEC 24 2015
DEC005-241404-
/O.CAN.KPHI.SV.W.0120.000000T0000Z-151224T1400Z/
SUSSEX DE-
854 AM EST THU DEC 24 2015
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUSSEX COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED.
THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 3925 7552 3926 7549 3928 7542 3921 7540
3915 7541 3911 7540 3907 7541 3901 7533
3901 7544 3925 7553
TIME...MOT...LOC 1354Z 247DEG 59KT 3917 7530
$$
DEC001-241400-
/O.CON.KPHI.SV.W.0120.000000T0000Z-151224T1400Z/
KENT DE-
854 AM EST THU DEC 24 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 AM EST
FOR NORTHEASTERN KENT COUNTY...
AT 854 AM EST...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS
LOCATED 8 MILES SOUTHWEST OF FORTESQUE...OR 11 MILES EAST OF DOVER...
MOVING NORTHEAST AT 70 MPH.
LOCATIONS IMPACTED INCLUDE...
DOVER...BOWERS...DOVER BASE HOUSING...RISING SUN-LEBANON...LITTLE
CREEK AND LEIPSIC.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.
&&
LAT...LON 3925 7552 3926 7549 3928 7542 3921 7540
3915 7541 3911 7540 3907 7541 3901 7533
3901 7544 3925 7553
TIME...MOT...LOC 1354Z 247DEG 59KT 3917 7530
$$
POThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 24, 8:25 AM EST | Special Weather Statement | PHI | Sussex | 35 min |
| Dec 24, 12:49 PM EST | Special Weather Statement | PHI | Sussex | 41 min |
| Dec 24, 1:23 PM EST | Special Weather Statement | PHI | Sussex | 37 min |
Nearby
Severe Thunderstorm Warnings in Delaware, 2015Every severe thunderstorm warning in 2015
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.