Alert archive / Maryland / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 25, NWS Philadelphia/Mount Holly

June 1, 2012Kent County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2012, 9:09 PM EDT for Kent County, Queen Anne's County, Talbot County, Maryland. It was in force for 66 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
Jun 1, 2012, 9:09 PM EDT (01:09 UTC)
Expired
Jun 1, 2012, 10:15 PM EDT
In force
66 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), 70 km from the middle of the area, began a volume at 01:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 1, 8:01 PM EDTTornado WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.2 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2012-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 497 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2012-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 289 square meters per square second.19395878Sfc1 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
497 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
621 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
289 m²/s²
0-3 km storm-relative helicity
334 m²/s²
Significant tornado parameter
0.9
Supercell composite
6.1

Open this sounding in Storm Lab

The text

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

344 
WUUS51 KPHI 020109
SVRPHI
MDC029-035-041-020215-
/O.NEW.KPHI.SV.W.0025.120602T0109Z-120602T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
909 PM EDT FRI JUN 1 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  TALBOT COUNTY IN EASTERN MARYLAND...
  THIS INCLUDES THE CITY OF EASTON...
  SOUTHWESTERN KENT COUNTY IN NORTHEAST MARYLAND...
  QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  THIS INCLUDES THE CITY OF CENTERVILLE...

* UNTIL 1015 PM EDT

* AT 904 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 7 MILES NORTHWEST OF STEVENSVILLE TO 14 MILES SOUTHWEST OF
  TILGHMAN ISLAND...OR ALONG A LINE EXTENDING FROM 17 MILES WEST OF
  CENTERVILLE TO 26 MILES SOUTHWEST OF EASTON...AND MOVING EAST AT 20
  MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  STEVENSVILLE AROUND 920 PM EDT...
  TILGHMAN ISLAND AND CHESTER AROUND 925 PM EDT...
  TALBOT AROUND 930 PM EDT...
  OVERTON AND GRASONVILLE AROUND 935 PM EDT...
  ST. MICHAELS AROUND 940 PM EDT...
  OLD TOWN AND COPPERVILLE AROUND 950 PM EDT...

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.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT SATURDAY MORNING
FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW
JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3872 7626 3872 7631 3866 7634 3877 7640
      3875 7635 3887 7625 3881 7621 3882 7620
      3894 7624 3890 7625 3892 7628 3884 7638
      3904 7632 3899 7627 3900 7618 3903 7625
      3917 7629 3919 7590 3857 7603
TIME...MOT...LOC 0108Z 264DEG 16KT 3908 7635 3858 7645

$$

SZATKOWSKI
1 follow-up statement
867 
WWUS51 KPHI 020136
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
936 PM EDT FRI JUN 1 2012

MDC029-035-041-020215-
/O.CON.KPHI.SV.W.0025.000000T0000Z-120602T0215Z/
KENT MD-TALBOT MD-QUEEN ANNE'S MD-
936 PM EDT FRI JUN 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR QUEEN ANNE'S...TALBOT AND SOUTHWESTERN KENT COUNTIES...

AT 930 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM ROCK HALL TO STEVENSVILLE TO TALBOT...MOVING EAST AT 
15 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  OVERTON AND GRASONVILLE BY 945 PM EDT...
  ST. MICHAELS AND QUEENSTOWN BY 955 PM EDT...
  OLD TOWN BY 1000 PM EDT...
  COPPERVILLE BY 1005 PM EDT...
  CENTERVILLE...WYE MILLS AND STARKEY CORNER BY 1015 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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 TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM EDT SATURDAY MORNING 
FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND 
EASTERN PENNSYLVANIA.

&&

LAT...LON 3872 7626 3872 7631 3866 7634 3877 7640
      3875 7635 3887 7625 3881 7621 3882 7620
      3894 7624 3890 7625 3892 7628 3884 7638
      3904 7632 3899 7627 3900 7618 3903 7625
      3917 7629 3919 7590 3857 7603
TIME...MOT...LOC 0134Z 253DEG 14KT 3915 7622 3861 7636

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 8:07 PM EDTSevere Thunderstorm WarningPHIQueen Anne's41 min
Jun 1, 8:30 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's60 min
Jun 1, 10:10 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's65 min
Jun 1, 10:14 PM EDTSpecial Weather StatementPHICaroline61 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.