Alert archive / Maryland / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 23, NWS Philadelphia/Mount Holly

June 1, 2012Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2012, 8:07 PM EDT for Queen Anne's County, Maryland. It was in force for 41 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 1, 2012, 8:07 PM EDT (00:07 UTC)
Expired
Jun 1, 2012, 8:48 PM EDT
In force
41 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 00:08 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.

What was reported inside it

TimeReportWhereRemark
Jun 1, 8:30 PM EDTTSTM WND DMG5 Ne Centreville, MDTREES DOWN. GARAGE BLOWN OFF FOUNDATION.
Jun 1, 8:30 PM EDTTORNADO5 Ne Centreville, MDMINOR DAMAGE TO SEVERAL HOMES. NUMEROUS TREES SNAPPED OR UPROOTED. RATED EF0.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 1, 1:50 PM EDTTornado WatchSPC7 hr
Jun 1, 8:01 PM EDTTornado WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.1 hours before the alert went out and 113 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°0°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.

053 
WUUS51 KPHI 020007
SVRPHI
MDC035-020100-
/O.NEW.KPHI.SV.W.0023.120602T0007Z-120602T0100Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  THIS INCLUDES THE CITY OF CENTERVILLE...

* UNTIL 900 PM EDT

* AT 804 PM EDT...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 NEAR
  WYE MILLS...OR 8 MILES SOUTH OF CENTERVILLE...AND MOVING NORTH AT
  10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STARR AROUND 825 PM EDT...
  CENTREVILLE AND CENTERVILLE AROUND 850 PM EDT...
  CARVILLE AND 6 MILES WEST OF HOPE AROUND 855 PM EDT...
  STARKEY CORNER AROUND 900 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.

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 3910 7616 3910 7612 3913 7610 3914 7609
      3913 7595 3892 7597 3895 7609 3894 7611
      3891 7612 3891 7619
TIME...MOT...LOC 0007Z 188DEG 9KT 3894 7610

$$

HEAVENER
2 follow-up statements
460 
WWUS51 KPHI 020031
SVSPHI

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

MDC035-020100-
/O.CON.KPHI.SV.W.0023.000000T0000Z-120602T0100Z/
QUEEN ANNE'S MD-
831 PM EDT FRI JUN 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR CENTRAL QUEEN ANNE'S COUNTY...

AT 829 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 6 MILES SOUTHWEST OF CARVILLE...OR NEAR CENTERVILLE...MOVING
NORTH AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  CARVILLE AND 6 MILES WEST OF HOPE BY 855 PM EDT...
  STARKEY CORNER BY 900 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.

&&

LAT...LON 3914 7609 3914 7607 3913 7595 3906 7595
      3904 7596 3905 7612
TIME...MOT...LOC 0031Z 188DEG 9KT 3900 7609

$$

HEAVENER
346 
WWUS51 KPHI 020048
SVSPHI

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

MDC035-020056-
/O.CAN.KPHI.SV.W.0023.000000T0000Z-120602T0100Z/
QUEEN ANNE'S MD-
848 PM EDT FRI JUN 1 2012

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

THE STORM THAT PROMPTED THE WARNING HAS MOVED FURTHER TO THE NORTH 
OUT OF THE WARNING AREA. A SEVERE THUNDERSTORM WARNING STILL REMAINS 
IN AFFECT FOR NORTHERN PORTIONS OF QUEEN ANNE'S, KENT, AND CECIL 
COUNTIES.

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 3914 7609 3914 7607 3913 7595 3906 7595
      3904 7596 3905 7612
TIME...MOT...LOC 0046Z 188DEG 9KT 3904 7608

$$

HEAVENER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 8:30 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's60 min
Jun 1, 9:09 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's, Talbot66 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.