Alert archive / Maryland / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 91, NWS Philadelphia/Mount Holly

July 13, 2010Kent County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 13, 2010, 9:21 PM EDT for Kent County, Queen Anne's County, Talbot County, Maryland. It was in force for 64 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 13, 2010, 9:21 PM EDT (01:21 UTC)
Expired
Jul 13, 2010, 10:25 PM EDT
In force
64 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), 68 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.4 hours before the alert went out and 102 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 2010-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 260 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 2010-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 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
260 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1054 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

540 
WUUS51 KPHI 140121
SVRPHI
MDC029-035-041-140215-
/O.NEW.KPHI.SV.W.0091.100714T0121Z-100714T0225Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
921 PM EDT TUE JUL 13 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 1015 PM EDT

* AT 918 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES NORTHWEST OF TILGHMAN
  ISLAND...OR 20 MILES WEST OF EASTON...AND MOVING NORTHEAST AT 30
  TO 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  TALBOT AROUND 930 PM EDT...
  CHESTER AROUND 940 PM EDT...
  GRASONVILLE AROUND 945 PM EDT...
  WYE MILLS AND OVERTON AROUND 950 PM EDT...
  CENTERVILLE...CENTREVILLE AND STARR AROUND 1000 PM EDT...
  CARVILLE AND HOPE AROUND 1005 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO SMALL HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 3875 7635 3887 7626 3882 7621 3883 7620
      3894 7624 3890 7624 3893 7628 3884 7638
      3903 7633 3900 7618 3903 7625 3912 7626
      3925 7607 3910 7585 3897 7596 3887 7596
      3871 7635 3877 7640
TIME...MOT...LOC 0117Z 236DEG 32KT 3882 7644

$$

RPW
1 follow-up statement
503 
WWUS51 KPHI 140201
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1001 PM EDT TUE JUL 13 2010

MDC029-035-041-140230-
/O.CON.KPHI.SV.W.0091.000000T0000Z-100714T0215Z/
KENT MD-QUEEN ANNE'S MD-TALBOT MD-
1001 PM EDT TUE JUL 13 2010

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

AT 1000 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR HOPE...OR 6 MILES EAST
OF CENTERVILLE...MOVING NORTHEAST AT 60 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL EASTERN QUEEN ANNE'S COUNTY AT 1010 PM EDT

IN ADDITION TO SMALL HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO 
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY! LIGHTNING IS ONE OF NATURES GREATEST KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

LAT...LON 3884 7603 3893 7610 3897 7614 3900 7618
      3912 7626 3925 7607 3910 7585 3897 7596
      3887 7596
TIME...MOT...LOC 0200Z 234DEG 52KT 3906 7595

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 9:41 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's, Talbot64 min
Jul 13, 9:52 PM EDTSpecial Weather StatementPHICecil68 min
Jul 14, 1:07 AM EDTSpecial Weather StatementPHITalbot83 min
Jul 14, 1:44 AM EDTSpecial Weather StatementPHICecil, Kent61 min
Jul 14, 2:58 AM EDTSpecial Weather StatementPHICaroline, Kent, Queen Anne's62 min
Jul 14, 10:15 AM EDTFlash Flood WatchPHICecil9 hr
Jul 14, 12:52 PM EDTAreal Flood AdvisoryPHICecil3 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2010Every severe thunderstorm warning in 2010

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.