Alert archive / Maryland / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 32, NWS Philadelphia/Mount Holly

May 14, 2010Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 14, 2010, 8:49 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 56 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
May 14, 2010, 8:49 PM EDT (00:49 UTC)
Expired
May 14, 2010, 9:45 PM EDT
In force
56 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 55 km from the middle of the area, began a volume at 00:50 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
May 14, 3:43 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.8 hours before the alert went out and 111 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, Wallops Is Stn, VA at 00:00Z on 2010-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 825 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, Wallops Is Stn, VA at 00:00Z on 2010-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 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
825 J/kg
Mixed-layer CIN
-152 J/kg
Mixed-layer LCL
1318 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
208 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

556 
WUUS51 KPHI 150049
SVRPHI
DEC001-005-MDC011-035-041-150145-
/O.NEW.KPHI.SV.W.0032.100515T0049Z-100515T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
849 PM EDT FRI MAY 14 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN KENT COUNTY IN CENTRAL DELAWARE...
  CAROLINE COUNTY IN EASTERN MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...
  THIS INCLUDES THE CITY OF EASTON...
  SOUTHWESTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  NORTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
  THIS INCLUDES THE CITY OF GEORGETOWN...

* UNTIL 945 PM EDT

* AT 846 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
  TALBOT...OR 13 MILES WEST OF EASTON...AND MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  COPPERVILLE AND ST. MICHAELS AROUND 855 PM EDT...
  EASTON AROUND 905 PM EDT...
  MATTHEWS AND TANYARD AROUND 910 PM EDT...
  MATTHEWS...GRIFFIN AND PRESTON AROUND 915 PM EDT...
  HARMONY AROUND 920 PM EDT...
  AGNER AROUND 925 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3863 7572 3869 7583 3869 7590 3865 7596
      3866 7622 3873 7625 3867 7636 3875 7636
      3887 7625 3882 7621 3883 7620 3894 7624
      3890 7624 3893 7628 3886 7634 3886 7635
      3899 7632 3892 7531 3861 7533
TIME...MOT...LOC 0049Z 276DEG 37KT 3882 7626

$$

HAYES
1 follow-up statement
716 
WWUS51 KPHI 150128
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
928 PM EDT FRI MAY 14 2010

DEC001-005-MDC011-035-041-150145-
/O.CON.KPHI.SV.W.0032.000000T0000Z-100515T0145Z/
KENT DE-CAROLINE MD-QUEEN ANNE'S MD-TALBOT MD-SUSSEX DE-
928 PM EDT FRI MAY 14 2010

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR NORTHWESTERN SUSSEX...TALBOT...SOUTHWESTERN QUEEN ANNE'S...
CAROLINE AND SOUTHERN KENT COUNTIES...

AT 924 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 NEAR HARMONY...OR 8 MILES EAST OF EASTON...MOVING EAST AT 35
MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  8 MILES SOUTH OF DENTON BY 935 PM EDT...
  AGNER AND FEDERALSBURG BY 940 PM EDT...
  SMITHVILLE...7 MILES WEST OF BRIDGEVILLE...9 MILES SOUTHWEST OF
  GREENWOOD AND 9 MILES SOUTHWEST OF ANDREWSVILLE BY 945 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY
AND EASTERN PENNSYLVANIA.

&&

LAT...LON 3863 7572 3869 7583 3869 7590 3865 7596
      3866 7622 3873 7625 3867 7636 3875 7636
      3887 7625 3882 7621 3883 7620 3894 7624
      3890 7624 3893 7628 3886 7634 3886 7635
      3899 7632 3892 7531 3861 7533
TIME...MOT...LOC 0127Z 274DEG 25KT 3877 7590

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 8:04 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's56 min
May 14, 9:45 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot60 min
May 14, 9:05 PM EDTSpecial Weather StatementPHINew Castle55 min
May 14, 9:06 PM EDTSpecial Weather StatementPHINew Castle54 min
May 14, 9:57 PM EDTSevere Thunderstorm WarningPHINew Castle48 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2010Severe Thunderstorm Warnings in Delaware, 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.