Alert archive / Maryland / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 59, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 2012, 11:03 PM EDT for 4 counties in Maryland. It was in force for 72 min. 5 reports 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
- Jun 29, 2012, 11:03 PM EDT (03:03 UTC)
- Expired
- Jun 30, 2012, 12:15 AM EDT
- In force
- 72 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 66 km from the middle of the area, began a volume at 03:06 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 |
|---|---|---|---|
| Jun 29, 11:22 PM EDT | TSTM WND DMG | Stevensville, MD | INITIAL WIND GUST 40 TO 50 MPH LOCALLY... WIRES DOWN ELSEWHERE. |
| Jun 29, 11:25 PM EDT | TSTM WND DMG | Easton, MD | TREES AND WIRES DOWN COUNTYWIDE... STARTING AT AROUND 1125 PM ON TILGMAN ISLAND. |
| Jun 29, 11:30 PM EDT | TSTM WND DMG | Stevensville, MD | LARGE TREE LIMBS DOWN. LARGE CHIMNEY AND EXTERIOR WALL DAMAGE TO HOUSE. |
| Jun 29, 11:35 PM EDT | TSTM WND GST 50 | Easton, MD | |
| Jun 29, 11:45 PM EDT | TSTM WND DMG | Millington, MD | LARGE LIMBS 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 |
|---|---|---|---|
| Jun 29, 10:09 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 3.1 hours before the alert went out and 104 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
- 5490 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1596 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 12.1
The text
As transmitted, in the capitals the NWS used until 2016.
881
WUUS51 KPHI 300303
SVRPHI
MDC011-029-035-041-300415-
/O.NEW.KPHI.SV.W.0059.120630T0303Z-120630T0415Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1103 PM EDT FRI JUN 29 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CAROLINE COUNTY IN EASTERN MARYLAND...
TALBOT COUNTY IN EASTERN MARYLAND...
THIS INCLUDES THE CITY OF EASTON...
KENT COUNTY IN NORTHEAST MARYLAND...
QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 1215 AM EDT
* AT 1057 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 38 MILES WEST OF ROCK HALL
TO 39 MILES WEST OF TILGHMAN ISLAND...OR ALONG A LINE EXTENDING
FROM 17 MILES WEST OF BALTIMORE TO 53 MILES WEST OF EASTON...AND
MOVING EAST AT 60 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
TILGHMAN ISLAND...TALBOT...CHESTER AND STEVENSVILLE AROUND 1135 PM
EDT...
NEWTOWN...OVERTON...LANGFORD AND COPPERVILLE AROUND 1140 PM EDT...
SKIPTON AND WYE MILLS AROUND 1145 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS
WEST VIRGINIA AND NORTHERN VIRGINIA. THIS IS AN UNUSUALLY DANGEROUS
SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY
FROM WINDOWS!
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT
SATURDAY MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHERN NEW JERSEY.
&&
LAT...LON 3872 7631 3866 7634 3877 7640 3875 7635
3887 7625 3881 7621 3882 7620 3894 7624
3884 7638 3886 7638 3904 7632 3899 7627
3900 7618 3914 7629 3932 7619 3935 7578
3865 7572 3869 7590 3857 7604
TIME...MOT...LOC 0302Z 272DEG 50KT 3926 7683 3855 7692
$$
AMC1 follow-up statement
858
WWUS51 KPHI 300354
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1154 PM EDT FRI JUN 29 2012
MDC011-029-035-041-300415-
/O.CON.KPHI.SV.W.0059.000000T0000Z-120630T0415Z/
KENT MD-TALBOT MD-CAROLINE MD-QUEEN ANNE'S MD-
1154 PM EDT FRI JUN 29 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR QUEEN ANNE'S...CAROLINE...TALBOT AND KENT COUNTIES...
AT 1149 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM CHESTERTOWN TO 10 MILES
SOUTH OF OXFORD...OR ALONG A LINE EXTENDING FROM 15 MILES NORTH OF
CENTERVILLE TO 17 MILES SOUTHWEST OF EASTON...MOVING EAST AT 55 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
CHOPTANK...WINDYHILL...TANYARD AND MATTHEWS BY MIDNIGHT EDT...
MILLINGTON...MASSEY...HARMONY AND GRIFFIN BY 1205 AM EDT...
AGNER AND TEMPLEVILLE BY 1210 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE ACROSS
VIRGINIA AND MARYLAND. THIS IS AN UNUSUALLY DANGEROUS SITUATION.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS!
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT
SATURDAY MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
SOUTHERN NEW JERSEY.
&&
LAT...LON 3872 7631 3866 7634 3877 7640 3875 7635
3887 7625 3881 7621 3882 7620 3894 7624
3884 7638 3886 7638 3904 7632 3899 7627
3900 7618 3914 7629 3932 7619 3935 7578
3865 7572 3869 7590 3857 7604
TIME...MOT...LOC 0353Z 271DEG 50KT 3925 7604 3854 7613
$$
AMCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 11:22 PM EDT | Special Weather Statement | PHI | Cecil | 53 min |
| Jun 29, 11:45 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 60 min |
| Jun 30, 12:45 AM EDT | Special Weather Statement | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 60 min |
| Jun 30, 3:48 AM EDT | Heat Advisory | PHI | Caroline, Cecil, Kent, Queen Anne's, Talbot | 16 hr |
Nearby
Severe Thunderstorm Warnings in Maryland, 2012Every severe thunderstorm warning in 2012
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.