Alert archive / Maryland / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

July 19, 2011Cape May County, Cumberland County, New Jersey; 5 counties in Maryland; Kent County, New Castle County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 19, 2011, 2:13 PM EDT for Cape May County, Cumberland County, New Jersey; 5 counties in Maryland; Kent County, New Castle County, Sussex County, Delaware. It was in force for 92 min. 3 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: Jul 19, 2011, 2:13 PM EDT (18:13 UTC)
Expired: Jul 19, 2011, 3:45 PM EDT
In force: 92 min
Issued by: NWS Philadelphia/Mount Holly

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Cape May County, NJ, Cumberland County, NJ

The radar

The Dover AFB radar (KDOX), 37 km from the middle of the area, began a volume at 18:16 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
Jul 19, 3:25 PM EDT	TSTM WND DMG	Lewes, DE	TREE DOWN NEAR LEWES
Jul 19, 3:30 PM EDT	TSTM WND DMG	Ese Viola, DE	TREE DOWN AT INTERSECTION OF CANTERBERRY RD AND ANDREWS LAKE RD
Jul 19, 3:45 PM EDT	TSTM WND DMG	Harrington, DE	TREE DOWN IN HARRINGTON

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

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.2 hours before the alert went out and 56 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: 1090 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1062 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

433 
WWUS81 KPHI 191813
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
213 PM EDT TUE JUL 19 2011

DEZ001>004-MDZ008-012-015-019-020-NJZ016-021-023-024-191945-
ATLANTIC COASTAL CAPE MAY NJ-CAPE MAY NJ-CAROLINE MD-CECIL MD-
CUMBERLAND NJ-DELAWARE BEACHES DE-INLAND SUSSEX DE-KENT MD-KENT DE-
NEW CASTLE DE-QUEEN ANNE'S MD-SALEM NJ-TALBOT MD-
213 PM EDT TUE JUL 19 2011

...A STRONG THUNDERSTORM WILL AFFECT CAPE MAY...CAROLINE...CECIL...
CUMBERLAND...KENT...NEW CASTLE...QUEEN ANNE'S...SALEM...SUSSEX AND
TALBOT COUNTIES...

AT 210 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
STRONG THUNDERSTORMS NEAR DOVER...MOVING SOUTHEAST AT 20 MPH. 
ADDITIONAL THUNDERSTORMS WERE DEVELOPING ACROSS THE DELMARVA AND 
EXTREME SOUTHERN NEW JERSEY.

WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH ANY OF THESE 
STORMS.


LAT...LON 3846 7570 3867 7576 3856 7605 3876 7640
      3883 7620 3894 7624 3884 7637 3902 7634
      3900 7618 3927 7622 3944 7600 3962 7610
      3958 7556 3924 7539 3934 7534 3952 7553
      3956 7552 3921 7464 3880 7508 3845 7505

$$

FORECASTER: NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 6:02 AM EDT	Heat Advisory	PHI	Burlington, Camden, Gloucester, Mercer, Salem	13 hr
Jul 19, 2:29 PM EDT	Excessive Heat Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more	5 days
Jul 19, 4:11 PM EDT	Special Marine Warning	PHI		64 min
Jul 19, 4:25 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	80 min
Jul 19, 5:04 PM EDT	Areal Flood Advisory	PHI	Cape May	3 hr
Jul 19, 5:52 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Cumberland, Salem	53 min
Jul 19, 6:00 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	90 min
Jul 19, 6:20 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Gloucester	55 min
Jul 19, 6:28 PM EDT	Areal Flood Advisory	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	3 hr
Jul 19, 7:08 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	52 min
Jul 19, 7:28 PM EDT	Areal Flood Advisory	PHI	Cumberland, Salem	3 hr
Jul 19, 3:27 AM EDT	Special Weather Statement	PHI	Monroe	63 min
Jul 19, 6:32 PM EDT	Special Weather Statement	PHI	Caroline, Talbot	88 min
Jul 19, 6:53 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Talbot	38 min
Jul 19, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	92 min
Jul 19, 3:45 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	3 hr
Jul 19, 4:12 PM EDT	Flash Flood Warning	PHI	Kent	3 hr
Jul 19, 4:40 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	32 min

Nearby

Special Weather Statements in Maryland, 2011 Special Weather Statements in Delaware, 2011 Special Weather Statements in New Jersey, 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.