Alert archive / Maryland / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 84, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2015, 1:13 AM EDT for 4 counties in Maryland; Kent County, New Castle County, Delaware. It was in force for 62 min. 1 report 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
- Jul 1, 2015, 1:13 AM EDT (05:13 UTC)
- Expired
- Jul 1, 2015, 2:15 AM EDT
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD
The radar
The Dover AFB radar (KDOX), 68 km from the middle of the area, began a volume at 05:16 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 |
|---|---|---|---|
| Jul 1, 1:53 AM EDT | TSTM WND DMG | Northeast Heights, MD | DOCK WAS DESTROYED AT THE NORTHEAST MARINA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 5.2 hours before the alert went out and 143 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
- 665 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1402 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
752
WUUS51 KPHI 010513
SVRPHI
DEC001-003-MDC011-015-029-035-010615-
/O.NEW.KPHI.SV.W.0084.150701T0513Z-150701T0615Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
113 AM EDT WED JUL 1 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
NORTHERN KENT COUNTY IN CENTRAL DELAWARE...
QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
NORTHEASTERN CAROLINE COUNTY IN EASTERN MARYLAND...
CENTRAL KENT COUNTY IN NORTHEASTERN MARYLAND...
CECIL COUNTY IN NORTHEASTERN MARYLAND...
* UNTIL 215 AM EDT
* AT 112 AM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED OVER OLD TOWN...OR NEAR
CENTERVILLE...AND MOVING NORTHEAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
DOVER...MIDDLETOWN...ELKTON...CENTERVILLE...SMYRNA...CHESTERTOWN...
CENTREVILLE...NORTH EAST...CLAYTON...CHESWOLD...CHARLESTOWN...
CHURCH HILL...CECILTON...MILLINGTON...SUDLERSVILLE...BETTERTON...
HARTLY...BOHEMIAS MILLS...DELANEY CORNER AND WARWICK.
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.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 3937 7608 3937 7606 3943 7600 3946 7601
3952 7598 3954 7601 3967 7596 3945 7558
3935 7549 3933 7550 3933 7548 3923 7540
3920 7540 3897 7597 3910 7618
TIME...MOT...LOC 0512Z 208DEG 35KT 3912 7607
$$1 follow-up statement
791
WWUS51 KPHI 010548
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
148 AM EDT WED JUL 1 2015
DEC001-003-MDC011-029-035-010556-
/O.CAN.KPHI.SV.W.0084.000000T0000Z-150701T0615Z/
NEW CASTLE DE-KENT DE-QUEEN ANNE'S MD-CAROLINE MD-KENT MD-
148 AM EDT WED JUL 1 2015
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN NEW CASTLE...
NORTHERN KENT...QUEEN ANNE'S...NORTHEASTERN CAROLINE AND CENTRAL KENT
COUNTIES IS CANCELLED...
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT
OF THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.
LAT...LON 3943 7600 3946 7601 3952 7598 3954 7601
3967 7596 3957 7578 3938 7577 3938 7582
3937 7585 3936 7590 3938 7595 3937 7598
3938 7605
TIME...MOT...LOC 0546Z 208DEG 35KT 3942 7587
$$
MDC015-010615-
/O.CON.KPHI.SV.W.0084.000000T0000Z-150701T0615Z/
CECIL MD-
148 AM EDT WED JUL 1 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM EDT
FOR CECIL COUNTY...
AT 146 AM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED NEAR ABERDEEN. THIS STORM WAS
MOVING NORTHEAST AT 40 MPH.
LOCATIONS IMPACTED INCLUDE...
ELKTON...NORTH EAST...CHARLESTOWN...CECILTON...CAYOTS...BRANTWOOD...
BOHEMIAS MILLS...WARWICK...HOLLYWOOD BEACH...BAY VIEW AND CHESAPEAKE
CITY.
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.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 3943 7600 3946 7601 3952 7598 3954 7601
3967 7596 3957 7578 3938 7577 3938 7582
3937 7585 3936 7590 3938 7595 3937 7598
3938 7605
TIME...MOT...LOC 0546Z 208DEG 35KT 3942 7587
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 12:56 AM EDT | Special Weather Statement | PHI | Caroline, Cecil, Kent, Queen Anne's | 94 min |
| Jul 1, 1:42 AM EDT | Severe Thunderstorm Warning | PHI | Cecil | 48 min |
| Jul 1, 2:14 AM EDT | Areal Flood Advisory | PHI | Cecil | 4 hr |
| Jun 30, 10:40 PM EDT | Special Weather Statement | PHI | Sussex | 50 min |
| Jul 1, 2:17 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 43 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.