Alert archive / Maryland / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 42, NWS Philadelphia/Mount Holly

June 4, 2008Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 4, 2008, 8:28 PM EDT for Kent County, Queen Anne's County, Maryland. It was in force for 62 min. 1 report 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 4, 2008, 8:28 PM EDT (00:28 UTC)
Expired: Jun 4, 2008, 9:30 PM EDT
In force: 62 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 69 km from the middle of the area, began a volume at 00:32 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

Time	Report	Where	Remark
Jun 4, 9:00 PM EDT	TSTM WND DMG	Centreville, MD	TREE DOWNED IN FRONT OF CAR WASH. TREE DAMAGED CAR IN ACME PARKING LOT.

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.

Issued	Product	Office	Lasted
Jun 4, 7:34 PM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 107 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: 225 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1210 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 6.6

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 050029
SVRPHI
MDC029-035-050130-
/O.NEW.KPHI.SV.W.0042.080605T0028Z-080605T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
828 PM EDT WED JUN 4 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 930 PM EDT

* AT 827 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE       
  HAIL...AND DAMAGING WINDS TO 60 MPH.  THESE STORMS WERE LOCATED    
  ALONG A LINE EXTENDING FROM 18 MILES WEST OF NEWTOWN TO 8 MILES    
  WEST OF STEVENSVILLE...OR ALONG A LINE EXTENDING FROM 45           
  MILES SOUTHWEST OF NEWARK TO 52 MILES WEST OF DOVER...AND MOVING   
  EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CHESTER AND STEVENSVILLE BY 835 PM...
  OVERTON...ROCK HALL AND GRASONVILLE BY 840 PM...
  NEWTOWN...OLD TOWN...LANGFORD AND CHESTERTOWN BY 845 PM...
  HOPE BY 850 PM...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM THURSDAY MORNING FOR
SOUTHERN DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.

LAT...LON 3905 7631 3899 7625 3898 7620 3901 7617
      3906 7619 3909 7615 3910 7615 3909 7619
      3901 7619 3901 7622 3903 7625 3910 7624
      3916 7629 3931 7619 3936 7578 3918 7579
      3896 7600 3894 7637
TIME...MOT...LOC 0028Z 273DEG 45KT 3935 7646 3898 7644

$$

GORSE

1 follow-up statement

000 
WWUS51 KPHI 050128
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
927 PM EDT WED JUN 4 2008

MDC029-035-050135-
/O.EXP.KPHI.SV.W.0042.000000T0000Z-080605T0130Z/
KENT MD-QUEEN ANNES MD-
927 PM EDT WED JUN 4 2008

...THE SEVERE THUNDERSTORM WARNING FOR QUEEN ANNES AND KENT COUNTIES
WILL EXPIRE AT 930 PM EDT...

THE LINE OF THUNDERSTORMS CONTINUES TO MOVE TO THE EAST WITH THE 
STRONGEST PART OF THE STORMS NOW MOVING OUT OF THE AREA, THEREFORE 
THE WARNING WILL BE ALLOWED TO EXPIRE. AN AREA OF RAIN AND EMBEDDED 
THUNDERSTORMS HOWEVER WILL PERSIST THROUGH AT LEAST 10:00 PM WITH 
LOCALLY HEAVY RAIN POSSIBLE.

LAT...LON 3905 7631 3899 7625 3898 7620 3901 7617
      3906 7619 3909 7615 3910 7615 3909 7619
      3901 7619 3901 7622 3903 7625 3910 7624
      3916 7629 3931 7619 3936 7578 3918 7579
      3896 7600 3894 7637
TIME...MOT...LOC 0125Z 273DEG 45KT 3931 7554 3894 7552

$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 8:50 PM EDT	Severe Thunderstorm Warning	PHI	Queen Anne's, Talbot	44 min
Jun 4, 9:51 PM EDT	Areal Flood Warning	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	4 hr
Jun 5, 4:34 AM EDT	Excessive Heat Watch	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	71 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2008 Every severe thunderstorm warning in 2008

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.