Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

April 3, 2011Caroline County, Kent County, Queen Anne's County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 3, 2011, 10:29 PM EDT for Caroline County, Kent County, Queen Anne's County, Maryland. It was in force for 61 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
Apr 3, 2011, 10:29 PM EDT (02:29 UTC)
Expired
Apr 3, 2011, 11:30 PM EDT
In force
61 min
Issued by
NWS Philadelphia/Mount Holly

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

The radar

The Dover AFB radar (KDOX), 59 km from the middle of the area, began a volume at 02:31 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, 2.5 hours before the alert went out and 112 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 2011-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2011-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2222 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
208 m²/s²
0-3 km storm-relative helicity
519 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.

232 
WWUS81 KPHI 040229
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1029 PM EDT SUN APR 3 2011

DEZ002-003-MDZ012-015-019-020-040330-
CAROLINE MD-INLAND SUSSEX DE-KENT MD-KENT DE-QUEEN ANNE'S MD-
TALBOT MD-
1029 PM EDT SUN APR 3 2011

...STRONG THUNDERSTORMS WILL AFFECT CAROLINE...KENT...QUEEN 
ANNE'S...SUSSEX AND TALBOT COUNTIES...

AT 1024 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN 
AREA OF STRONG THUNDERSTORMS 7 MILES SOUTH OF BALTIMORE...MOVING 
SOUTHEAST AT 35 MPH. THESE THUNDERSTORMS WILL BE NEAR OVERTON...ROCK 
HALL AROUND 1045 PM...STARR...CENTERVILLE AROUND 1100 PM...RIDGELY 
AND JUMPTOWN AROUND 1115 PM.

THESE STORMS MAY PRODUCE PEA SIZED HAIL.

LAT...LON 3859 7571 3867 7576 3869 7586 3867 7592
      3882 7631 3887 7625 3882 7620 3894 7624
      3890 7624 3893 7628 3884 7636 3885 7639
      3905 7631 3900 7627 3900 7618 3903 7625
      3915 7628 3931 7619 3905 7554

$$

HAYES

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 4, 4:07 AM EDTGale WarningPHI35 hr
Apr 4, 2:15 PM EDTRed Flag WarningPHIBurlington, Camden, Ocean4 hr
Apr 4, 3:24 PM EDTWind AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more22 hr
Apr 3, 11:09 PM EDTSpecial Weather StatementPHICaroline, Kent, Queen Anne's66 min

Nearby

Special Weather Statements in Maryland, 2011Every special weather statement in 2011

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.