Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

March 9, 2012Kent County, Delaware; 4 counties in Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Mar 9, 2012, 1:27 AM EST for Kent County, Delaware; 4 counties in Maryland. It was in force for 63 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
Mar 9, 2012, 1:27 AM EST (06:27 UTC)
Expired
Mar 9, 2012, 2:30 AM EST
In force
63 min
Issued by
NWS Philadelphia/Mount Holly

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

The radar

The Dover AFB radar (KDOX), 53 km from the middle of the area, began a volume at 06:27 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, 6.5 hours before the alert went out and 119 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 2012-03-09Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2012-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1885 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
109 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.

765 
WWUS81 KPHI 090627
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
127 AM EST FRI MAR 9 2012

DEZ002-MDZ012-015-019-020-090730-
CAROLINE MD-KENT DE-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
127 AM EST FRI MAR 9 2012

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT KENT...TALBOT...
CAROLINE AND QUEEN ANNE'S COUNTIES...

AT 124 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS WITH STRONG WIND GUSTS ALONG A LINE EXTENDING FROM 5 MILES
SOUTHWEST OF MIDDLETOWN TO 13 MILES NORTHWEST OF CENTERVILLE TO 30
MILES SOUTH OF BALTIMORE...MOVING SOUTHEAST AT 35 MPH. THE SHOWERS
WILL BE NEAR OLD TOWN...MASSEY...CRUMPTON AROUND 135 AM...OVERTON...
STEVENSVILLE...MILLINGTON AROUND 140 AM...STARKEY CORNER...CHESTER...
SUDLERSVILLE AND STEVENSVILLE SOUTH AROUND 145 AM.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE SHOWERS...ALONG WITH A 
BRIEF PERIOD OF HEAVY RAINFALL.

LAT...LON 3872 7626 3867 7635 3877 7640 3887 7625
      3881 7621 3882 7620 3894 7624 3884 7638
      3904 7632 3900 7618 3917 7629 3936 7605
      3938 7577 3930 7576 3929 7567 3935 7555
      3924 7539 3900 7532 3889 7549 3861 7607

$$

ROBERTSON

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 11:18 PM ESTSpecial Weather StatementPHISussex, Warren57 min
Mar 9, 12:01 AM ESTSpecial Weather StatementPHIHunterdon, Morris, Somerset, Sussex, Warren59 min
Mar 9, 12:58 AM ESTSpecial Weather StatementPHIGloucester, Hunterdon, Mercer, Middlesex, Morris, Somerset62 min
Mar 9, 1:09 AM ESTSpecial Marine WarningPHI96 min
Mar 9, 1:46 AM ESTSpecial Marine WarningPHI89 min
Mar 9, 1:56 AM ESTSpecial Weather StatementPHIAtlantic, Burlington, Camden, Monmouth, Ocean64 min
Mar 9, 11:52 AM ESTSmall Craft AdvisoryPHI24 hr
Mar 9, 2:28 AM ESTSpecial Weather StatementPHIKent62 min
Mar 9, 12:50 AM ESTSpecial Weather StatementPHICecil, Kent, Queen Anne's40 min

Nearby

Special Weather Statements in Maryland, 2012Special Weather Statements in Delaware, 2012Every special weather statement in 2012

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.