Alert archive / Maryland / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 202, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2011, 9:26 PM EDT for 4 counties in Maryland. It was in force for 45 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
- Jul 28, 2011, 9:26 PM EDT (01:26 UTC)
- Expired
- Jul 28, 2011, 10:11 PM EDT
- In force
- 45 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.4 hours before the alert went out and 114 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
- 852 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1488 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 282 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
467
WUUS51 KPHI 290126
SVRPHI
MDC011-029-035-041-290230-
/O.NEW.KPHI.SV.W.0202.110729T0126Z-110729T0230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
926 PM EDT THU JUL 28 2011
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...
SOUTHWESTERN KENT COUNTY IN NORTHEAST MARYLAND...
CENTRAL QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 1030 PM EDT
* AT 920 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR LANGFORD...OR 15 MILES
NORTHWEST OF CENTERVILLE...AND MOVING SOUTH AT 35 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STARKEY CORNER AROUND 935 PM EDT...
CENTREVILLE...CENTERVILLE AND CARVILLE AROUND 945 PM EDT...
WYE MILLS AND STARR AROUND 955 PM EDT...
SKIPTON AND QUEEN ANNE AROUND 1000 PM EDT...
CORDOVA AROUND 1005 PM EDT...
GRIFFIN AROUND 1010 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
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.
&&
LAT...LON 3857 7607 3873 7625 3868 7633 3887 7625
3886 7625 3882 7621 3883 7620 3894 7622
3900 7618 3901 7622 3918 7628 3927 7622
3930 7609 3898 7574 3878 7572 3870 7572
3867 7580 3869 7590 3857 7602
TIME...MOT...LOC 0127Z 340DEG 30KT 3918 7615
$$
PO2 follow-up statements
314
WWUS51 KPHI 290156
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
956 PM EDT THU JUL 28 2011
MDC011-029-035-041-290230-
/O.CON.KPHI.SV.W.0202.000000T0000Z-110729T0230Z/
CAROLINE MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
956 PM EDT THU JUL 28 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR TALBOT...CENTRAL QUEEN ANNE'S...SOUTHWESTERN KENT AND CAROLINE
COUNTIES...
AT 952 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR STARR...OR NEAR
CENTERVILLE...MOVING SOUTH AT 35 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
CORDOVA AND HILLSBORO BY 1005 PM EDT...
GRIFFIN BY 1010 PM EDT...
MATTHEWS AND 6 MILES EAST OF EASTON BY 1015 PM EDT...
TANYARD AND HARMONY BY 1020 PM EDT...
PRESTON...CHOPTANK AND WINDYHILL BY 1025 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 3857 7607 3873 7625 3868 7633 3887 7625
3886 7625 3882 7621 3883 7620 3894 7622
3900 7618 3901 7622 3910 7624 3920 7625
3924 7610 3897 7582 3878 7572 3870 7572
3867 7580 3869 7590 3857 7602
TIME...MOT...LOC 0156Z 340DEG 30KT 3895 7604
$$
!138
WWUS51 KPHI 290211
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1011 PM EDT THU JUL 28 2011
MDC011-029-035-041-290221-
/O.CAN.KPHI.SV.W.0202.000000T0000Z-110729T0230Z/
CAROLINE MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
1011 PM EDT THU JUL 28 2011
...THE SEVERE THUNDERSTORM WARNING FOR TALBOT...CENTRAL QUEEN
ANNE'S...SOUTHWESTERN KENT AND CAROLINE COUNTIES IS CANCELLED...
THE STORM THAT PROMPTED WARNING HAS WEAKENED AND IS NO LONGER
PRODUCING SEVERE WEATHER.
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.
LAT...LON 3857 7607 3873 7625 3868 7633 3887 7625
3886 7625 3882 7621 3883 7620 3894 7622
3900 7618 3901 7622 3910 7624 3920 7625
3924 7610 3897 7582 3878 7572 3870 7572
3867 7580 3869 7590 3857 7602
TIME...MOT...LOC 0211Z 340DEG 30KT 3883 7599
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 9:10 PM EDT | Special Weather Statement | PHI | Caroline, Kent, Queen Anne's | 65 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2011Every severe thunderstorm warning in 2011
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.