Alert archive / Delaware / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

August 4, 2012Kent County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 4, 2012, 5:07 PM EDT for Kent County, Delaware. It was in force for 53 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: Aug 4, 2012, 5:07 PM EDT (21:07 UTC)
Expired: Aug 4, 2012, 6:00 PM EDT
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly

County Kent County, DE

The radar

The Dover AFB radar (KDOX), 9 km from the middle of the area, began a volume at 21:10 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, 9.1 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: 1055 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 31 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.

707 
WWUS81 KPHI 042107
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
507 PM EDT SAT AUG 4 2012

DEZ002-003-042200-
INLAND SUSSEX DE-KENT DE-
507 PM EDT SAT AUG 4 2012

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

AT 505 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
STRONG THUNDERSTORM BETWEEN ELLENDALE AND GREENWOOD...MOVING NORTH 
AT 10 MPH. THE THUNDERSTORM WILL BE NEAR FARMINGTON AROUND 515 
PM...MILFORD AND HOUSTON AROUND 545 PM...AND FREDERICA AND RIVERVIEW 
AROUND 600 PM.

ADDITIONAL STRONG THUNDERSTORMS WILL AFFECT PARTS OF KENT COUNTY AND 
SUSSEX COUNTY.

VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER 
TO POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.

WIND GUSTS TO 40 MPH ARE POSSIBLE.

EXPECT SMALL HAIL AND FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING
FROM THESE STORMS.

LAT...LON 3862 7568 3921 7557 3918 7540 3907 7539
      3900 7531 3894 7530 3893 7530 3889 7527
      3857 7539

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 1:26 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	34 min
Aug 4, 2:13 PM EDT	Severe Thunderstorm Warning	PHI	Salem	62 min
Aug 4, 2:28 PM EDT	Special Marine Warning	PHI		62 min
Aug 4, 2:53 PM EDT	Special Weather Statement	PHI	Mercer	67 min
Aug 4, 3:21 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	54 min
Aug 4, 3:35 PM EDT	Special Marine Warning	PHI		38 min
Aug 4, 3:42 PM EDT	Special Weather Statement	PHI	Middlesex, Somerset	63 min
Aug 4, 3:47 PM EDT	Small Craft Advisory	PHI		39 hr
Aug 4, 4:01 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Morris, Somerset	59 min
Aug 4, 5:30 PM EDT	Small Craft Advisory	PHI		4 hr
Aug 4, 1:12 PM EDT	Special Weather Statement	PHI	Philadelphia	63 min
Aug 4, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery	44 min
Aug 4, 2:51 PM EDT	Special Weather Statement	PHI	Northampton	54 min
Aug 4, 3:55 PM EDT	Special Weather Statement	PHI	Lebanon	65 min
Aug 4, 4:08 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	52 min
Aug 4, 4:49 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	56 min
Aug 4, 1:18 PM EDT	Special Weather Statement	PHI	New Castle	57 min
Aug 4, 2:43 PM EDT	Areal Flood Advisory	PHI	New Castle	105 min
Aug 4, 3:31 PM EDT	Flash Flood Warning	PHI	New Castle	57 min
Aug 4, 3:31 PM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	28 min

Nearby

Special Weather Statements in Delaware, 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.