Alert archive / Maryland / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 132, NWS Philadelphia/Mount Holly

July 10, 2007Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 10, 2007, 4:14 PM EDT for Talbot County, Maryland. It was in force for 34 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 10, 2007, 4:14 PM EDT (20:14 UTC)
Expired: Jul 10, 2007, 4:48 PM EDT
In force: 34 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Talbot County, MD

The radar

The Dover AFB radar (KDOX), 53 km from the middle of the area, began a volume at 20:16 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.2 hours before the alert went out and 80 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: 1638 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1336 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 17 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 102015
SVRPHI
MDC041-102100-
/O.NEW.KPHI.SV.W.0132.070710T2014Z-070710T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
414 PM EDT TUE JUL 10 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL 500 PM EDT

* AT 407 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
  CORDOVA...OR ABOUT 32 MILES SOUTHWEST OF DOVER...AND FORMING
  TOWARD THE SOUTHWEST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  EASTON BY 425 PM EDT...
  TRAPPE BY 435 PM EDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT 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.

THIS STORM HAS PRODUCED PENNY SIZE HAIL IN CENTRAL CAROLINE COUNTY 
ABOUT 4:00 PM. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY 
AWAY FROM WINDOWS

LAT...LON 3882 7618 3861 7612 3860 7602 3867 7598
      3873 7602 3878 7598 3882 7591 3889 7595

$$

JRP

1 follow-up statement

000 
WWUS51 KPHI 102048
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
447 PM EDT TUE JUL 10 2007

MDC041-102057-
/O.CAN.KPHI.SV.W.0132.000000T0000Z-070710T2100Z/
TALBOT MD-
447 PM EDT TUE JUL 10 2007

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN TALBOT COUNTY IS
CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED AND HAVE MOSTLY 
REMAINED OVER CAROLINE AND QUEEN ANNES COUNTIES.

LAT...LON 3882 7618 3861 7612 3860 7602 3867 7598
      3873 7602 3878 7598 3882 7591 3889 7595

$$

AMC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 1:04 PM EDT	Heat Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	5 hr
Jul 10, 3:11 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's	49 min
Jul 10, 3:59 PM EDT	Severe Thunderstorm Warning	PHI	Caroline	31 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2007 Every 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.