Alert archive / Maryland / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

May 4, 2012Caroline County, Queen Anne's County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at May 4, 2012, 1:02 AM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland. It was in force for 58 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, 1:02 AM EDT (05:02 UTC)
Expired: May 4, 2012, 2:00 AM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly

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

The radar

The Dover AFB radar (KDOX), 50 km from the middle of the area, began a volume at 05:03 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 00:00Z, 5.0 hours before the alert went out and 107 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1095 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 70 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.

140 
WWUS81 KPHI 040502
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
102 AM EDT FRI MAY 4 2012

DEZ002-003-MDZ015-019-020-040600-
CAROLINE MD-INLAND SUSSEX DE-KENT DE-QUEEN ANNE'S MD-TALBOT MD-
102 AM EDT FRI MAY 4 2012

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

AT 100 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
CLUSTER OF STRONG THUNDERSTORMS 7 MILES WEST OF EASTON...MOVING EAST 
AT 25 MPH. THE THUNDERSTORMS WILL BE NEAR OXFORD AROUND 100 AM... 
EASTON...HAMBLETON AROUND 115 AM...TANYARD...CHOPTANK AROUND 130 
AM...FEDERALSBURG...PRESTON AROUND 145 AM...SMITHVILLE AND SEAFORD 
AROUND 200 AM.

VERY HEAVY RAIN WILL FALL FROM THE STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
THESE STORMS MAY ALSO PRODUCE SMALL HAIL.

LAT...LON 3846 7570 3864 7571 3868 7576 3870 7584
      3867 7594 3860 7598 3857 7604 3872 7626
      3871 7629 3887 7625 3886 7624 3881 7621
      3882 7620 3894 7624 3898 7622 3900 7618
      3904 7620 3909 7617 3898 7550 3845 7563

$$

HAYES

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, 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
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.