Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

May 4, 2012Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at May 4, 2012, 1:34 PM EDT for Talbot County, Maryland. It was in force for 26 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 4, 2012, 1:34 PM EDT (17:34 UTC)
Expired: May 4, 2012, 2:00 PM EDT
In force: 26 min
Issued by: NWS Philadelphia/Mount Holly

County Talbot County, MD

The radar

The Dover AFB radar (KDOX), 71 km from the middle of the area, began a volume at 17:34 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 12:00Z, 5.6 hours before the alert went out and 100 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: 891 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 136 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.

881 
WWUS81 KPHI 041734
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
134 PM EDT FRI MAY 4 2012

MDZ015-019-041800-
QUEEN ANNE'S MD-TALBOT MD-
134 PM EDT FRI MAY 4 2012

...GUST FRONT ASSOCIATED FROM A DECAYING THUNDERSTORM WILL 
AFFECT QUEEN ANNE'S AND TALBOT COUNTIES...

AT 128 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SHOWERS AND A GUST FRONT WITH WIND GUSTS ALONG A LINE EXTENDING FROM 
12 MILES SOUTHWEST OF CENTERVILLE TO 14 MILES WEST OF EASTON TO 21 
MILES SOUTHWEST OF EASTON...MOVING EAST AT 20 MPH. THE SHOWERS AND 
GUST FRONT WILL BE NEAR ST. MICHAELS AROUND 140 PM...COPPERVILLE 
AROUND 145 PM...WYE MILLS AROUND 150 PM...SKIPTON...OXFORD AROUND 
155 PM...EASTON...CORDOVA AND OXFORD AROUND 200 PM.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE SHOWERS AND GUST FRONT, 
MAINLY TOWARD CHESAPEAKE BAY.

LAT...LON 3873 7625 3868 7636 3877 7640 3875 7635
      3882 7631 3885 7636 3884 7637 3885 7637
      3887 7625 3882 7621 3883 7620 3894 7624
      3890 7624 3893 7628 3886 7636 3898 7624
      3896 7595 3878 7600 3864 7612

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 4:21 AM EDT	Special Weather Statement	PHI	Sussex	54 min
May 4, 5:41 AM EDT	Special Weather Statement	PHI	Morris, Sussex, Warren	64 min
May 4, 6:07 PM EDT	Special Weather Statement	PHI	Sussex, Warren	113 min
May 4, 4:37 AM EDT	Special Weather Statement	PHI	Carbon, Monroe	53 min
May 4, 4:45 PM EDT	Special Weather Statement	PHI	Carbon	45 min
May 4, 1:02 AM EDT	Special Weather Statement	PHI	Caroline, Queen Anne's, Talbot	58 min
May 4, 12:56 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	15 min
May 4, 2:07 PM EDT	Special Weather Statement	PHI	Caroline	38 min

Nearby

Special Weather Statements in Maryland, 2012 Every 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.