Alert archive / Delaware / Special Weather Statements in 2015

Special Weather Statement, NWS Philadelphia/Mount Holly

August 5, 2015Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 5, 2015, 12:52 AM EDT for Sussex County, Delaware. It was in force for 23 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 5, 2015, 12:52 AM EDT (04:52 UTC)
Expired
Aug 5, 2015, 1:15 AM EDT
In force
23 min
Issued by
NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 36 km from the middle of the area, began a volume at 04:53 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, 4.9 hours before the alert went out and 76 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2015-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 961 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2015-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 square meters per square second.193958Sfc1 km3 km6 kmRMLM
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
961 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1098 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
75 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.

133 
WWUS81 KPHI 050452
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1252 AM EDT WED AUG 5 2015
 
DEZ003-004-050515-
DELAWARE BEACHES-INLAND SUSSEX-
1252 AM EDT WED AUG 5 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN SUSSEX
COUNTY...

AT 1252 AM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR MILLVILLE TO NEAR SELBYVILLE TO SALISBURY
UNIVERSITY...AND MOVING EAST AT 45 MPH.

WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY 
CAUSE LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED 
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE 
SHELTER INSIDE A BUILDING OR VEHICLE.

LOCATIONS IMPACTED INCLUDE...
MILLSBORO...SELBYVILLE...DAGSBORO...MILLVILLE...GUMBORO...LONG
NECK...OCEAN VIEW...FRANKFORD AND SOUTH BETHANY.

LAT...LON 3846 7556 3864 7531 3864 7514 3863 7509
      3864 7507 3864 7506 3862 7507 3862 7511
      3859 7521 3857 7518 3859 7514 3858 7507
      3860 7510 3861 7506 3860 7506 3845 7505
TIME...MOT...LOC 0452Z 273DEG 38KT 3856 7518 3844 7527 3833 7560 
$$

ROBERTSON

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 8:04 PM EDTSpecial Weather StatementPHICumberland56 min
Aug 4, 10:07 PM EDTSpecial Weather StatementPHICape May53 min
Aug 4, 10:30 PM EDTAreal Flood AdvisoryPHICape May4 hr
Aug 4, 10:40 PM EDTSpecial Marine WarningPHI50 min
Aug 4, 10:56 PM EDTSpecial Weather StatementPHICape May19 min
Aug 4, 11:22 PM EDTSpecial Marine WarningPHI53 min
Aug 4, 10:44 PM EDTSpecial Weather StatementPHITalbot31 min
Aug 4, 11:10 PM EDTSpecial Weather StatementPHICaroline, Talbot50 min
Aug 4, 11:28 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot32 min
Aug 4, 9:01 PM EDTSpecial Weather StatementPHINew Castle59 min
Aug 4, 10:24 PM EDTSpecial Weather StatementPHISussex51 min
Aug 4, 11:06 PM EDTSpecial Weather StatementPHISussex24 min
Aug 4, 11:18 PM EDTAreal Flood AdvisoryPHISussex4 hr
Aug 4, 11:35 PM EDTFlash Flood WarningPHISussex4 hr
Aug 4, 11:43 PM EDTSpecial Weather StatementPHISussex47 min
Aug 5, 12:04 AM EDTSpecial Weather StatementPHISussex41 min
Aug 5, 12:39 AM EDTFlash Flood WarningPHISussex4 hr

Nearby

Special Weather Statements in Delaware, 2015Every special weather statement in 2015

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.