Alert archive / Maryland / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 230, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 1, 2011, 6:41 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 18 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 1, 2011, 6:41 PM EDT (22:41 UTC)
- Expired
- Aug 1, 2011, 6:59 PM EDT
- In force
- 18 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Caroline County, MD, Queen Anne's County, MD, Talbot County, MD
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.7 hours before the alert went out and 75 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
- 307 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 1512 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -192 m²/s²
- 0-3 km storm-relative helicity
- -166 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.5
The text
As transmitted, in the capitals the NWS used until 2016.
672
WUUS51 KPHI 012241
SVRPHI
MDC011-035-041-020000-
/O.NEW.KPHI.SV.W.0230.110801T2241Z-110802T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
641 PM EDT MON AUG 1 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CAROLINE COUNTY IN EASTERN MARYLAND...
EASTERN TALBOT COUNTY IN EASTERN MARYLAND...
CENTRAL QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 800 PM EDT
* AT 638 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A DEVELOPING SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR STARR...OR NEAR CENTERVILLE...AND MOVING SOUTHEAST
AT 15 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SKIPTON AROUND 655 PM EDT...
JUMPTOWN AND SKIPTON AROUND 700 PM EDT...
QUEEN ANNE AND RIDGELY AROUND 705 PM EDT...
CORDOVA AROUND 710 PM EDT...
GRIFFIN AROUND 720 PM EDT...
MATTHEWS AND DENTON AROUND 725 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.
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 3903 7616 3907 7610 3911 7602 3884 7572
3878 7572 3872 7572 3870 7574 3867 7580
3869 7582 3869 7586 3867 7595 3858 7600
TIME...MOT...LOC 2241Z 325DEG 14KT 3899 7603
$$
TFG1 follow-up statement
439
WWUS51 KPHI 012259
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
659 PM EDT MON AUG 1 2011
MDC011-035-041-012309-
/O.CAN.KPHI.SV.W.0230.000000T0000Z-110802T0000Z/
CAROLINE MD-QUEEN ANNE'S MD-TALBOT MD-
659 PM EDT MON AUG 1 2011
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TALBOT...CENTRAL QUEEN
ANNE'S AND CAROLINE COUNTIES IS CANCELLED...
THE THUNDERSTORM HAS WEAKENED BELOW SEVERE LIMITS.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3903 7616 3907 7610 3911 7602 3884 7572
3878 7572 3872 7572 3870 7574 3867 7580
3869 7582 3869 7586 3867 7595 3858 7600
TIME...MOT...LOC 2259Z 325DEG 14KT 3893 7598
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 4:07 PM EDT | Special Weather Statement | PHI | Cecil | 53 min |
| Aug 1, 4:46 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 48 min |
| Aug 1, 5:12 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 78 min |
| Aug 1, 6:12 PM EDT | Areal Flood Advisory | PHI | Kent, Queen Anne's | 2 hr |
| Aug 1, 7:31 PM EDT | Special Weather Statement | PHI | Caroline, Cecil, Kent, Queen Anne's | 119 min |
| Aug 1, 7:46 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 38 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.