Alert archive / Maryland / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 71, NWS Philadelphia/Mount Holly

June 12, 2007Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 12, 2007, 4:39 PM EDT for Queen Anne's County, Maryland. It was in force for 51 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 12, 2007, 4:39 PM EDT (20:39 UTC)
Expired
Jun 12, 2007, 5:30 PM EDT
In force
51 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 51 km from the middle of the area, began a volume at 20:40 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 12, 12:55 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.7 hours before the alert went out and 43 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, Phillips Aaf/Abe, MD at 12:00Z on 2007-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 186 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, Phillips Aaf/Abe, MD at 12:00Z on 2007-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.1939Sfc1 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
186 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1120 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
34 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.

000 
WUUS51 KPHI 122038
SVRPHI
MDC035-122130-
/O.NEW.KPHI.SV.W.0071.070612T2039Z-070612T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
439 PM EDT TUE JUN 12 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN QUEEN ANNES COUNTY IN NORTHEAST MARYLAND...

* UNTIL 530 PM EDT

* AT 432 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  SUDLERSVILLE...OR ABOUT 20 MILES WEST OF DOVER...AND MOVING SOUTH
  AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL CENTRAL QUEEN ANNES COUNTY AT 450 PM EDT
  RURAL SOUTHERN QUEEN ANNES COUNTY AT 530 PM EDT

LAT...LON 3924 7578 3923 7595 3901 7603 3894 7601
      3900 7592 3915 7578

$$

MPD
2 follow-up statements
000 
WWUS51 KPHI 122051
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
450 PM EDT TUE JUN 12 2007

MDC035-122130-
/O.CON.KPHI.SV.W.0071.000000T0000Z-070612T2130Z/
QUEEN ANNES MD-
450 PM EDT TUE JUN 12 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR EASTERN QUEEN ANNES COUNTY...

AT 449 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR BARCLAY...OR ABOUT 18 MILES WEST OF DOVER...MOVING
SOUTHWEST AT 10 MPH. THE STRONGEST PART OF THIS STORM WAS BETWEEN 
CRUMPTON AND KINGSTOWN.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL NORTHERN QUEEN ANNES COUNTY AT 500 PM EDT

LAT...LON 3924 7578 3923 7595 3901 7603 3894 7601
      3900 7592 3915 7578

$$

JRP
000 
WWUS51 KPHI 122114
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
512 PM EDT TUE JUN 12 2007

MDC035-122130-
/O.CON.KPHI.SV.W.0071.000000T0000Z-070612T2130Z/
QUEEN ANNES MD-
512 PM EDT TUE JUN 12 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR QUEEN ANNES COUNTY...

AT 506 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 
THIS STORM WAS LOCATED NEAR CENTERVILLE. THIS STORM WAS MOVING 
SOUTHWEST AT AROUND 10 MPH. 

THE SEVERE THUNDERSTORM WILL BE NEAR...
  EAST OF AND NEAR CHESTER BY 530 PM EDT...

LAT...LON 3921 7583 3917 7604 3904 7612 3895 7632
      3889 7618 3894 7601 3900 7592 3909 7582

$$

MPD

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 4:26 PM EDTSevere Thunderstorm WarningPHICecil, Kent34 min
Jun 12, 4:57 PM EDTSevere Thunderstorm WarningPHITalbot48 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2007Every severe thunderstorm warning in 2007

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.