Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

May 4, 2012Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at May 4, 2012, 2:07 PM EDT for Caroline County, Maryland. It was in force for 38 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, 2:07 PM EDT (18:07 UTC)
Expired: May 4, 2012, 2:45 PM EDT
In force: 38 min
Issued by: NWS Philadelphia/Mount Holly

County Caroline County, MD

The radar

The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 18:08 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 6.1 hours before the alert went out and 93 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: 123 J/kg
Mixed-layer CIN: -374 J/kg
Mixed-layer LCL: 1064 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 157 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.

938 
WWUS81 KPHI 041807
SPSPHI

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

MDZ019-020-041845-
CAROLINE MD-TALBOT MD-
207 PM EDT FRI MAY 4 2012

...GUST FRONT ASSOCIATED WITH A DECAYING THUNDERSTORM COMPLEX WILL 
AFFECT TALBOT AND CAROLINE COUNTIES...

AT 200 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SHOWERS AND A GUST FRONT WITH WIND GUSTS ALONG A LINE EXTENDING FROM 
EASTON TO 9 MILES SOUTH OF EASTON...MOVING EAST AT 30 MPH. THE 
SHOWERS AND GUST FRONT WILL BE NEAR TANYARD...HARMONY AROUND 
215 PM...FEDERALSBURG AND AGNER AROUND 230 PM.

WIND GUSTS TO 40 MPH ARE POSSIBLE.

LAT...LON 3857 7605 3861 7608 3860 7611 3863 7615
      3885 7606 3877 7572 3876 7571 3864 7571
      3868 7576 3867 7580 3870 7581 3869 7590
      3867 7594 3860 7598 3857 7603

$$

KRUZDLO

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, 1:34 PM EDT	Special Weather Statement	PHI	Talbot	26 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.