Alert archive / Maryland / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 109, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 4, 2015, 11:28 PM EDT for Caroline County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 32 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
- Aug 4, 2015, 11:28 PM EDT (03:28 UTC)
- Expired
- Aug 5, 2015, 12:00 AM EDT
- In force
- 32 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 34 km from the middle of the area, began a volume at 03:30 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 00:00Z, 3.5 hours before the alert went out and 96 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
- 961 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 1098 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
379
WUUS51 KPHI 050328
SVRPHI
DEC001-005-MDC011-041-050415-
/O.NEW.KPHI.SV.W.0109.150805T0328Z-150805T0415Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1128 PM EDT TUE AUG 4 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WEST CENTRAL SUSSEX COUNTY IN SOUTHERN DELAWARE...
SOUTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
CAROLINE COUNTY IN EASTERN MARYLAND...
EAST CENTRAL TALBOT COUNTY IN EASTERN MARYLAND...
* UNTIL 1215 AM EDT
* AT 1128 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED NEAR TANYARD...OR NEAR EASTON...AND MOVING EAST AT 30
MPH.
* THIS SEVERE THUNDERSTORM WILL BE NEAR...
MATTHEWS AROUND 1135 PM EDT.
PRESTON AND GRIFFIN AROUND 1140 PM EDT.
HARMONY AROUND 1145 PM EDT.
DENTON AROUND 1150 PM EDT.
FEDERALSBURG AND AGNER AROUND 1155 PM EDT.
SMITHVILLE AROUND 1200 AM EDT.
ANDREWSVILLE AROUND 1210 AM EDT.
BRIDGEVILLE AROUND 1215 AM EDT.
OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
HILLSBORO.
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 3866 7573 3869 7577 3868 7580 3870 7580
3871 7584 3868 7592 3869 7606 3889 7607
3899 7561 3864 7560
TIME...MOT...LOC 0328Z 267DEG 25KT 3879 7601
$$
ROBERTSON2 follow-up statements
051
WWUS51 KPHI 050350
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1150 PM EDT TUE AUG 4 2015
MDC041-050359-
/O.CAN.KPHI.SV.W.0109.000000T0000Z-150805T0415Z/
TALBOT MD-
1150 PM EDT TUE AUG 4 2015
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL TALBOT COUNTY IS
CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 3866 7573 3869 7577 3868 7580 3870 7580
3871 7584 3889 7585 3899 7561 3864 7560
TIME...MOT...LOC 0349Z 267DEG 25KT 3880 7582
$$
DEC001-005-MDC011-050415-
/O.CON.KPHI.SV.W.0109.000000T0000Z-150805T0415Z/
SUSSEX DE-KENT DE-CAROLINE MD-
1150 PM EDT TUE AUG 4 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR WEST CENTRAL SUSSEX...SOUTHWESTERN KENT AND SOUTHEASTERN CAROLINE
COUNTIES...
AT 1149 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
WAS LOCATED NEAR AGNER...OR 11 MILES NORTH OF HURLOCK...MOVING EAST
AT 30 MPH.
THIS SEVERE STORM WILL BE NEAR...
SMITHVILLE AROUND 1200 AM EDT.
ANDREWSVILLE AROUND 1210 AM EDT.
BRIDGEVILLE AROUND 1215 AM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE 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 3866 7573 3869 7577 3868 7580 3870 7580
3871 7584 3889 7585 3899 7561 3864 7560
TIME...MOT...LOC 0349Z 267DEG 25KT 3880 7582
$$
ROBERTSON157
WWUS51 KPHI 050400
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1200 AM EDT WED AUG 5 2015
DEC001-005-MDC011-050410-
/O.CAN.KPHI.SV.W.0109.000000T0000Z-150805T0415Z/
SUSSEX DE-KENT DE-CAROLINE MD-
1200 AM EDT WED AUG 5 2015
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL SUSSEX...
SOUTHWESTERN KENT AND SOUTHEASTERN CAROLINE COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 3866 7573 3869 7577 3868 7580 3870 7580
3871 7584 3889 7585 3899 7561 3864 7560
TIME...MOT...LOC 0357Z 267DEG 25KT 3880 7572
$$
ROBERTSONThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 10:44 PM EDT | Special Weather Statement | PHI | Talbot | 31 min |
| Aug 4, 11:10 PM EDT | Special Weather Statement | PHI | Caroline, Talbot | 50 min |
| Aug 4, 9:01 PM EDT | Special Weather Statement | PHI | New Castle | 59 min |
| Aug 4, 10:24 PM EDT | Special Weather Statement | PHI | Sussex | 51 min |
| Aug 4, 11:06 PM EDT | Special Weather Statement | PHI | Sussex | 24 min |
| Aug 4, 11:18 PM EDT | Areal Flood Advisory | PHI | Sussex | 4 hr |
| Aug 4, 11:35 PM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Aug 4, 11:43 PM EDT | Special Weather Statement | PHI | Sussex | 47 min |
| Aug 5, 12:04 AM EDT | Special Weather Statement | PHI | Sussex | 41 min |
| Aug 5, 12:39 AM EDT | Flash Flood Warning | PHI | Sussex | 4 hr |
| Aug 5, 12:52 AM EDT | Special Weather Statement | PHI | Sussex | 23 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2015Severe 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.