Alert archive / Maryland / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 190, NWS Philadelphia/Mount Holly

July 24, 2011Kent County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 24, 2011, 2:13 PM EDT for Kent County, Queen Anne's County, Talbot County, Maryland. It was in force for 36 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 24, 2011, 2:13 PM EDT (18:13 UTC)
Expired: Jul 24, 2011, 2:49 PM EDT
In force: 36 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 71 km from the middle of the area, began a volume at 18:14 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, 6.2 hours before the alert went out and 100 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 856 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1208 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: 54 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.

441 
WUUS51 KPHI 241813
SVRPHI
MDC029-035-041-241915-
/O.NEW.KPHI.SV.W.0190.110724T1813Z-110724T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
213 PM EDT SUN JUL 24 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL TALBOT COUNTY IN EASTERN MARYLAND...
  EXTREME SOUTHWESTERN KENT COUNTY IN NORTHEAST MARYLAND...
  SOUTHWESTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...

* UNTIL 315 PM EDT

* AT 210 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 6 MILES WEST OF STEVENSVILLE...
  OR 19 MILES WEST OF CENTERVILLE...AND MOVING SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STEVENSVILLE AROUND 235 PM EDT...
  CHESTER AROUND 240 PM EDT...
  6 MILES SOUTHWEST OF OVERTON AROUND 245 PM EDT...
  GRASONVILLE AROUND 255 PM EDT...
  SKIPTON...WYE MILLS...6 MILES NORTHEAST OF COPPERVILLE AND 8 MILES
  SOUTHWEST OF STARR AROUND 315 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 3905 7631 3899 7624 3898 7621 3900 7618
      3905 7625 3906 7623 3897 7596 3874 7609
      3884 7629 3887 7625 3882 7621 3883 7620
      3894 7624 3890 7624 3893 7628 3890 7633
      3886 7633 3888 7637 3894 7637
TIME...MOT...LOC 1813Z 298DEG 15KT 3902 7641

$$

HAYES

2 follow-up statements

886 
WWUS51 KPHI 241826
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
226 PM EDT SUN JUL 24 2011

MDC029-035-041-241915-
/O.CON.KPHI.SV.W.0190.000000T0000Z-110724T1915Z/
KENT MD-QUEEN ANNE'S MD-TALBOT MD-
226 PM EDT SUN JUL 24 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTH CENTRAL TALBOT...SOUTHWESTERN QUEEN ANNE'S AND EXTREME
SOUTHWESTERN KENT COUNTIES...

AT 223 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 STEVENSVILLE...OR 16
MILES WEST OF CENTERVILLE...MOVING SOUTHEAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  STEVENSVILLE SOUTH BY 235 PM EDT...
  CHESTER BY 240 PM EDT...
  6 MILES SOUTHWEST OF OVERTON BY 245 PM EDT...
  GRASONVILLE BY 255 PM EDT...
  QUEENSTOWN BY 300 PM EDT...
  SKIPTON...WYE MILLS...6 MILES NORTHEAST OF COPPERVILLE AND 8 MILES
  SOUTHWEST OF STARR BY 315 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 3905 7631 3899 7624 3898 7621 3900 7618
      3905 7625 3906 7623 3897 7596 3874 7609
      3884 7629 3887 7625 3882 7621 3883 7620
      3894 7624 3890 7624 3893 7628 3890 7633
      3886 7633 3888 7637 3894 7637
TIME...MOT...LOC 1826Z 298DEG 15KT 3899 7635

$$

HAYES

769 
WWUS51 KPHI 241849
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
249 PM EDT SUN JUL 24 2011

MDC029-035-041-241859-
/O.CAN.KPHI.SV.W.0190.000000T0000Z-110724T1915Z/
KENT MD-QUEEN ANNE'S MD-TALBOT MD-
249 PM EDT SUN JUL 24 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL TALBOT...
SOUTHWESTERN QUEEN ANNE'S AND EXTREME SOUTHWESTERN KENT COUNTIES IS
CANCELLED...

THE STORM THAT PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER 
EXPECTED TO PRODUCE 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 3905 7631 3899 7624 3898 7621 3900 7618
      3905 7625 3906 7623 3897 7596 3874 7609
      3884 7629 3887 7625 3882 7621 3883 7620
      3894 7624 3890 7624 3893 7628 3890 7633
      3886 7633 3888 7637 3894 7637
TIME...MOT...LOC 1849Z 298DEG 15KT 3894 7624

$$

HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 3:48 AM EDT	Heat Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	16 hr
Jul 24, 1:42 PM EDT	Special Weather Statement	PHI	Caroline	63 min
Jul 24, 3:10 PM EDT	Special Weather Statement	PHI	Kent	65 min
Jul 24, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	54 min
Jul 24, 4:43 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	62 min
Jul 24, 5:57 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's	63 min
Jul 24, 6:41 PM EDT	Special Weather Statement	PHI	Talbot	64 min
Jul 24, 7:35 PM EDT	Special Weather Statement	PHI	Talbot	55 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2011 Every 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; radar from the NEXRAD Level II archive.