Alert archive / Delaware / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

July 25, 2011Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 25, 2011, 4:15 PM EDT for Kent County, Delaware. It was in force for 60 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: Jul 25, 2011, 4:15 PM EDT (20:15 UTC)
Expired: Jul 25, 2011, 5:15 PM EDT
In force: 60 min
Issued by: NWS Philadelphia/Mount Holly

County Kent County, DE

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 81 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: 481 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 760 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 24 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.

856 
WWUS81 KPHI 252015
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
415 PM EDT MON JUL 25 2011

DEZ002-003-252115-
INLAND SUSSEX DE-KENT DE-
415 PM EDT MON JUL 25 2011

...A STRONG THUNDERSTORM WILL AFFECT PORTIONS OF KENT AND SUSSEX 
COUNTIES...

AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 15 MILES SOUTH OF DOVER...MOVING EAST AT 20 MPH.
THE THUNDERSTORM WILL BE NEAR WOODSIDE AROUND 420 PM...RIVERVIEW
AROUND 425 PM...HOUSTON AROUND 430 PM...FREDERICA...MAGNOLIA AROUND
435 PM...MILFORD AROUND 440 PM AND BOWERS AROUND 445 PM.

VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THIS STORM.

EXPECT CLOUD TO GROUND LIGHTNING FROM THIS STORM. DO NOT SEEK 
SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A 
THUNDERSTORM APPROACHES.

LAT...LON 3883 7571 3907 7574 3912 7539 3907 7539
      3903 7533 3898 7529 3893 7530 3889 7525
      3884 7522

$$

FORECASTER: GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 7:47 AM EDT	Special Weather Statement	PHI	Sussex	58 min
Jul 25, 9:17 AM EDT	Special Weather Statement	PHI	Sussex	58 min
Jul 25, 10:19 AM EDT	Special Weather Statement	PHI	Sussex	56 min
Jul 25, 4:31 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Warren	3 hr
Jul 25, 5:18 PM EDT	Flash Flood Warning	PHI	Warren	3 hr
Jul 24, 10:53 PM EDT	Special Weather Statement	PHI	Schuylkill	67 min
Jul 25, 6:19 AM EDT	Special Weather Statement	PHI	Monroe	56 min
Jul 25, 10:30 AM EDT	Special Weather Statement	PHI	Monroe	90 min
Jul 25, 11:51 AM EDT	Special Weather Statement	PHI	Berks	54 min
Jul 25, 11:58 AM EDT	Special Weather Statement	PHI	Carbon, Monroe	62 min
Jul 25, 12:19 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Monroe	56 min
Jul 25, 12:45 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Lehigh	60 min
Jul 25, 12:59 PM EDT	Areal Flood Advisory	PHI	Carbon	2 hr
Jul 25, 1:34 PM EDT	Special Weather Statement	PHI	Berks	56 min
Jul 25, 3:01 PM EDT	Special Weather Statement	PHI	Northampton	59 min
Jul 25, 4:25 PM EDT	Flash Flood Warning	PHI	Northampton	3 hr
Jul 25, 5:18 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	57 min
Jul 25, 5:49 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	93 min
Jul 25, 5:57 PM EDT	Special Weather Statement	PHI	Berks	63 min
Jul 25, 6:23 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	3 hr
Jul 25, 7:13 PM EDT	Special Weather Statement	PHI	Delaware	62 min
Jul 25, 3:54 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	66 min
Jul 25, 4:26 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	94 min
Jul 25, 4:49 PM EDT	Areal Flood Advisory	PHI	Kent, Queen Anne's	100 min
Jul 25, 5:02 PM EDT	Areal Flood Advisory	PHI	Caroline	2 hr
Jul 25, 2:10 AM EDT	Special Weather Statement	PHI	Sussex	2 hr
Jul 25, 5:04 PM EDT	Special Weather Statement	PHI	Sussex	56 min
Jul 25, 6:10 PM EDT	Areal Flood Advisory	PHI	Sussex	77 min

Nearby

Special Weather Statements in Delaware, 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; the sounding from the Mesonet's radiosonde archive.