Alert archive / Maryland / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 93, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 9, 2015, 7:38 PM EDT for 4 counties in Maryland; Kent County, New Castle County, Delaware. It was in force for 52 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 9, 2015, 7:38 PM EDT (23:38 UTC)
- Expired
- Jul 9, 2015, 8:30 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 63 km from the middle of the area, began a volume at 23:39 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 9, 7:49 PM EDT | TSTM WND DMG | Centreville, MD | TREES DOWN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 9, 4:57 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.6 hours before the alert went out and 107 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
- 1 J/kg
- Mixed-layer CIN
- -194 J/kg
- Mixed-layer LCL
- 1091 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
625
WUUS51 KPHI 092338
SVRPHI
DEC001-003-MDC011-029-035-041-100030-
/O.NEW.KPHI.SV.W.0093.150709T2338Z-150710T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
738 PM EDT THU JUL 9 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
NORTHWESTERN KENT COUNTY IN CENTRAL DELAWARE...
QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
CENTRAL CAROLINE COUNTY IN EASTERN MARYLAND...
SOUTHWESTERN KENT COUNTY IN NORTHEASTERN MARYLAND...
TALBOT COUNTY IN EASTERN MARYLAND...
* UNTIL 830 PM EDT
* AT 737 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR
STARKEY CORNER TO OVERTON TO NEAR SHADY SIDE...AND MOVING EAST AT
50 MPH.
* LOCATIONS IMPACTED INCLUDE...
EASTON...CENTERVILLE...SMYRNA...CHESTERTOWN...DENTON...
CENTREVILLE...CLAYTON...GREENSBORO...OAKLAND...RIDGELY...
CHESWOLD...ROCK HALL...ST. MICHAELS...CHURCH HILL...OXFORD...
MILLINGTON...SUDLERSVILLE...GOLDSBORO...QUEEN ANNE AND HARTLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...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 3884 7626 3878 7621 3879 7619 3894 7621
3894 7624 3896 7625 3894 7625 3898 7628
3897 7622 3900 7617 3917 7628 3931 7617
3931 7549 3886 7582 3868 7604 3870 7623
3876 7622 3871 7628
TIME...MOT...LOC 2337Z 267DEG 43KT 3915 7605 3904 7621 3880 7654
$$
GORSE/FRANCK1 follow-up statement
880
WWUS51 KPHI 100006
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
806 PM EDT THU JUL 9 2015
DEC001-003-MDC011-029-035-041-100030-
/O.CON.KPHI.SV.W.0093.000000T0000Z-150710T0030Z/
NEW CASTLE DE-KENT DE-QUEEN ANNE'S MD-CAROLINE MD-KENT MD-TALBOT MD-
806 PM EDT THU JUL 9 2015
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR SOUTH CENTRAL NEW CASTLE...NORTHWESTERN KENT...QUEEN ANNE'S...
CENTRAL CAROLINE...SOUTHWESTERN KENT AND TALBOT COUNTIES...
AT 805 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70
MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR
HAZLETTVILLE TO GOLDSBORO TO NEAR COPPERVILLE...MOVING EAST AT 50
MPH.
LOCATIONS IMPACTED INCLUDE...
EASTON...CENTERVILLE...SMYRNA...CHESTERTOWN...DENTON...CENTREVILLE...
CLAYTON...GREENSBORO...OAKLAND...RIDGELY...CHESWOLD...ROCK HALL...ST.
MICHAELS...CHURCH HILL...OXFORD...MILLINGTON...SUDLERSVILLE...
GOLDSBORO...QUEEN ANNE AND HARTLY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DEADLY LIGHTNING AND
VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS
QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 3884 7626 3878 7621 3879 7619 3894 7621
3894 7624 3896 7625 3894 7625 3898 7628
3897 7622 3900 7617 3917 7628 3931 7617
3931 7549 3886 7582 3868 7604 3870 7623
3876 7622 3871 7628
TIME...MOT...LOC 0005Z 267DEG 43KT 3917 7564 3906 7580 3882 7613
$$
GORSE/FRANCKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 9:15 PM EDT | Special Weather Statement | PHI | Cecil | 30 min |
| Jul 8, 9:43 PM EDT | Special Weather Statement | PHI | Cecil | 32 min |
| Jul 9, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 40 min |
| Jul 9, 7:29 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 46 min |
| Jul 9, 7:55 PM EDT | Severe Thunderstorm Warning | PHI | Kent, New Castle | 40 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.