Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

June 17, 2011Caroline County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this special weather statement at Jun 17, 2011, 7:02 PM EDT for Caroline County, Talbot County, Maryland. It was in force for 58 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 17, 2011, 7:02 PM EDT (23:02 UTC)
Expired: Jun 17, 2011, 8:00 PM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly

Counties Caroline County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 65 km from the middle of the area, began a volume at 23:05 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.

What was reported inside it

Time	Report	Where	Remark
Jun 17, 7:29 PM EDT	TSTM WND DMG	Tilghman, MD	TREES AND WIRES DOWN..PROBABLY S PART OF TILGHMAN. MAY ISSUE MORE DETAIL LATER.
Jun 17, 7:39 PM EDT	TSTM WND DMG	Oxford, MD	TREES AND WIRES DOWN...EXTENT UNKNOWN. MAY UPDATE LATER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.0 hours before the alert went out and 108 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: 2 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 1339 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 77 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.

416 
WWUS81 KPHI 172302
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
702 PM EDT FRI JUN 17 2011

MDZ019-020-180000-
CAROLINE MD-TALBOT MD-
702 PM EDT FRI JUN 17 2011

...A STRONG THUNDERSTORM WILL AFFECT CAROLINE AND TALBOT COUNTIES...

AT 657 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 34 MILES WEST OF EASTON...MOVING EAST AT 35 MPH.
THE THUNDERSTORM WILL BE NEAR OXFORD...TILGHMAN ISLAND AROUND 730
PM...TRAPPE...WINDYHILL AROUND 745 PM AND FEDERALSBURG AROUND 800 PM.

BRIEF HEAVY DOWNPOURS...GUSTY WINDS AND CLOUD TO GROUND LIGHTNING 
CAN BE EXPECTED AS THIS THUNDERSTORM MOVES THROUGH BETWEEN 730 AND 
800 PM.

LAT...LON 3861 7609 3867 7622 3873 7625 3870 7627
      3872 7631 3866 7635 3867 7636 3874 7635
      3877 7640 3879 7638 3875 7635 3884 7630
      3883 7621 3885 7620 3887 7611 3891 7575
      3866 7572 3869 7590 3856 7605

$$

JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 9:32 PM EDT	Coastal Flood Advisory	PHI	Salem	4 hr
Jun 17, 2:00 AM EDT	Special Weather Statement	PHI	Cape May	60 min
Jun 17, 4:39 AM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Somerset	51 min
Jun 17, 1:30 PM EDT	Special Weather Statement	PHI	Sussex, Warren	60 min
Jun 17, 1:45 PM EDT	Special Weather Statement	PHI	Morris	45 min
Jun 17, 1:48 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	57 min
Jun 17, 3:31 PM EDT	Special Weather Statement	PHI	Middlesex	59 min
Jun 17, 3:45 PM EDT	Special Weather Statement	PHI	Cumberland, Gloucester, Salem	60 min
Jun 17, 4:48 PM EDT	Special Weather Statement	PHI	Monmouth	57 min
Jun 17, 7:35 PM EDT	Special Marine Warning	PHI		25 min
Jun 17, 4:05 AM EDT	Special Weather Statement	PHI	Philadelphia	55 min
Jun 17, 3:10 AM EDT	Coastal Flood Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	9 hr
Jun 17, 2:34 PM EDT	Special Weather Statement	PHI	Cecil	56 min
Jun 17, 7:23 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	52 min
Jun 16, 11:45 PM EDT	Special Weather Statement	PHI	Sussex	60 min
Jun 17, 12:51 AM EDT	Special Weather Statement	PHI	Sussex	54 min

Nearby

Special Weather Statements in Maryland, 2011 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.