Alert archive / Maryland / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS Philadelphia/Mount Holly

February 24, 2012Caroline County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Feb 24, 2012, 3:29 PM EST for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 46 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
Feb 24, 2012, 3:29 PM EST (20:29 UTC)
Expired
Feb 24, 2012, 4:15 PM EST
In force
46 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Caroline County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 65 km from the middle of the area, began a volume at 20:30 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.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.5 hours before the alert went out and 106 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.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2012-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2012-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 220 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
602 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
220 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

540 
WUUS51 KPHI 242029
SVRPHI
MDC011-035-041-242115-
/O.NEW.KPHI.SV.W.0001.120224T2029Z-120224T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
329 PM EST FRI FEB 24 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...
  SOUTHERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...

* UNTIL 415 PM EST

* AT 326 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 11
  MILES SOUTHWEST OF TILGHMAN ISLAND...OR 23 MILES SOUTHWEST OF
  EASTON...AND MOVING NORTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TILGHMAN ISLAND AROUND 340 PM EST...
  ST. MICHAELS AND OXFORD AROUND 345 PM EST...
  COPPERVILLE AROUND 350 PM EST...
  EASTON AROUND 355 PM EST...
  SKIPTON AROUND 400 PM EST...
  MATTHEWS AND CORDOVA AROUND 405 PM EST...

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 3872 7626 3872 7631 3866 7634 3867 7635
      3877 7640 3875 7635 3887 7625 3881 7621
      3882 7620 3894 7624 3890 7625 3892 7628
      3883 7637 3884 7638 3890 7638 3914 7575
      3865 7571 3870 7581 3869 7590 3857 7604
TIME...MOT...LOC 2029Z 242DEG 41KT 3866 7643

$$
1 follow-up statement
279 
WWUS51 KPHI 242056
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
356 PM EST FRI FEB 24 2012

MDC035-242105-
/O.CAN.KPHI.SV.W.0001.000000T0000Z-120224T2115Z/
QUEEN ANNE'S MD-
356 PM EST FRI FEB 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN QUEEN ANNE'S COUNTY
IS CANCELLED...

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 3873 7626 3872 7631 3866 7635 3868 7636
      3874 7635 3876 7640 3875 7635 3883 7625
      3881 7621 3883 7620 3895 7574 3866 7572
      3870 7580 3869 7590 3858 7605
TIME...MOT...LOC 2055Z 242DEG 41KT 3880 7609

$$

MDC011-041-242115-
/O.CON.KPHI.SV.W.0001.000000T0000Z-120224T2115Z/
TALBOT MD-CAROLINE MD-
356 PM EST FRI FEB 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EST
FOR SOUTHERN CAROLINE AND TALBOT COUNTIES...

AT 352 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS 
LOCATED OVER SOUTHERN TALBOT COUNTY...MOVING NORTHEAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE ACROSS SOUTHERN TALBOT AND SOUTHERN 
CAROLINE COUNTIES THROUGH 415 PM. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3873 7626 3872 7631 3866 7635 3868 7636
      3874 7635 3876 7640 3875 7635 3883 7625
      3881 7621 3883 7620 3895 7574 3866 7572
      3870 7580 3869 7590 3858 7605
TIME...MOT...LOC 2055Z 242DEG 41KT 3880 7609

$$

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 24, 3:40 AM ESTWind AdvisoryPHICaroline, Cecil, Kent, Queen Anne's, Talbot42 hr
Feb 24, 3:16 PM ESTSpecial Weather StatementPHICaroline, Queen Anne's, Talbot44 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.