Alert archive / Delaware / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

August 19, 2011Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Aug 19, 2011, 3:13 PM EDT for Sussex County, Delaware. It was in force for 92 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 19, 2011, 3:13 PM EDT (19:13 UTC)
Expired
Aug 19, 2011, 4:45 PM EDT
In force
92 min
Issued by
NWS Philadelphia/Mount Holly

County Sussex County, DE

The radar

The Dover AFB radar (KDOX), 35 km from the middle of the area, began a volume at 19:16 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.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.2 hours before the alert went out and 71 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 12:00Z on 2011-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 766 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 12:00Z on 2011-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.1939Sfc1 km3 km6 km9 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
766 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
1132 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

755 
WWUS81 KPHI 191913
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
313 PM EDT FRI AUG 19 2011

DEZ003-004-192045-
DELAWARE BEACHES DE-INLAND SUSSEX DE-
313 PM EDT FRI AUG 19 2011

...A STRONG THUNDERSTORM WILL AFFECT SUSSEX COUNTY...

AT 312 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 8 MILES NORTHEAST OF SALISBURY...MOVING EAST AT
10 MPH. THE THUNDERSTORM WILL BE NEAR GUMBORO AROUND 415 PM...
SELBYVILLE AND FRANKFORD 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 TO 40 MPH ARE POSSIBLE WITH THIS STORM.

EXPECT SMALL HAIL AND FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING
FROM THIS STORM.

LAT...LON 3845 7561 3854 7563 3864 7517 3865 7511
      3864 7509 3866 7506 3861 7504 3845 7503
      3844 7505

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:11 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester64 min
Aug 18, 8:26 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester112 min
Aug 18, 8:31 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer59 min
Aug 18, 8:48 PM EDTSpecial Weather StatementPHIWarren57 min
Aug 18, 8:48 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean57 min
Aug 18, 8:59 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren61 min
Aug 18, 9:48 PM EDTSevere Thunderstorm WarningPHIHunterdon, Middlesex, Morris, Somerset, Warren57 min
Aug 18, 9:53 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland, Salem67 min
Aug 18, 9:57 PM EDTSevere Thunderstorm WarningPHIMorris43 min
Aug 19, 12:19 AM EDTSpecial Marine WarningPHI26 min
Aug 19, 12:19 AM EDTSpecial Weather StatementPHICape May41 min
Aug 19, 12:50 AM EDTSpecial Weather StatementPHICumberland, Salem40 min
Aug 19, 1:14 AM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 1 more3 hr
Aug 19, 1:31 AM EDTSpecial Weather StatementPHICumberland, Gloucester, Salem59 min
Aug 19, 2:28 AM EDTSpecial Weather StatementPHICamden, Cumberland, Gloucester, Salem47 min
Aug 19, 2:48 AM EDTSpecial Weather StatementPHIMonmouth, Ocean57 min
Aug 19, 3:06 AM EDTAreal Flood AdvisoryPHIAtlantic, Cape May, Cumberland114 min
Aug 19, 3:21 AM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Ocean114 min
Aug 19, 6:24 AM EDTSpecial Weather StatementPHIMercer, Middlesex36 min
Aug 19, 6:37 AM EDTSpecial Weather StatementPHIMiddlesex23 min
Aug 19, 1:34 PM EDTSpecial Marine WarningPHI41 min
Aug 19, 2:39 PM EDTSpecial Marine WarningPHI96 min
Aug 19, 3:23 PM EDTSpecial Marine WarningPHI67 min
Aug 19, 4:05 PM EDTSpecial Weather StatementPHICamden55 min
Aug 19, 4:15 PM EDTSpecial Marine WarningPHI90 min
Aug 19, 4:29 PM EDTSevere Thunderstorm WarningPHIWarren61 min
Aug 19, 4:32 PM EDTAreal Flood AdvisoryPHISussex, Warren2 hr
Aug 19, 4:38 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden67 min
Aug 19, 4:42 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Salem4 hr
Aug 19, 5:12 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Sussex, Warren78 min
Aug 19, 5:27 PM EDTAreal Flood AdvisoryPHIMonmouth, Ocean111 min
Aug 19, 5:29 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean50 min
Aug 19, 5:47 PM EDTSpecial Marine WarningPHI118 min
Aug 19, 5:49 PM EDTAreal Flood AdvisoryPHIHunterdon, Mercer, Middlesex, Morris, Somerset104 min
Aug 19, 5:59 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Morris, Somerset80 min
Aug 19, 6:14 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester, Mercer, Salem65 min
Aug 19, 6:24 PM EDTSevere Thunderstorm WarningPHIMorris28 min
Aug 19, 6:54 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth31 min
Aug 18, 8:08 PM EDTSpecial Weather StatementPHIBerks67 min
Aug 19, 12:02 AM EDTSpecial Weather StatementPHIChester58 min
Aug 19, 4:00 AM EDTAreal Flood WarningPHIDelaware4 hr
Aug 19, 1:46 PM EDTSevere Thunderstorm WarningPHIMonroe59 min
Aug 19, 2:35 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe70 min
Aug 19, 2:38 PM EDTAreal Flood AdvisoryPHICarbon, Monroe3 hr
Aug 19, 2:57 PM EDTFlash Flood WarningPHICarbon, Monroe3 hr
Aug 19, 3:47 PM EDTSevere Thunderstorm WarningPHICarbon, Monroe58 min
Aug 19, 4:52 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery, Northampton53 min
Aug 19, 5:35 PM EDTSevere Thunderstorm WarningPHIChester55 min
Aug 19, 5:39 PM EDTAreal Flood AdvisoryPHIChester, Delaware3 hr
Aug 19, 5:42 PM EDTSevere Thunderstorm WarningPHIChester, Montgomery48 min
Aug 19, 5:45 PM EDTAreal Flood AdvisoryPHIBucks, Montgomery, Philadelphia3 hr
Aug 18, 8:35 PM EDTSpecial Weather StatementPHIQueen Anne's55 min
Aug 19, 1:00 AM EDTSpecial Weather StatementPHICecil45 min
Aug 19, 1:44 AM EDTSpecial Weather StatementPHICecil, Kent, Queen Anne's61 min
Aug 19, 4:09 PM EDTSevere Thunderstorm WarningPHICaroline, Queen Anne's66 min
Aug 19, 4:42 PM EDTSevere Thunderstorm WarningPHICaroline63 min
Aug 19, 4:53 PM EDTAreal Flood AdvisoryPHICaroline, Cecil, Kent, Queen Anne's5 hr
Aug 19, 6:18 PM EDTAreal Flood AdvisoryPHICaroline, Kent, Queen Anne's, Talbot3 hr
Aug 19, 6:21 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's69 min
Aug 19, 6:34 PM EDTAreal Flood AdvisoryPHICaroline2 hr
Aug 19, 1:20 PM EDTSpecial Weather StatementPHIKent, Sussex85 min
Aug 19, 1:42 PM EDTSevere Thunderstorm WarningPHISussex63 min
Aug 19, 2:09 PM EDTAreal Flood AdvisoryPHISussex92 min
Aug 19, 2:33 PM EDTAreal Flood AdvisoryPHIKent, New Castle7 hr
Aug 19, 2:53 PM EDTSevere Thunderstorm WarningPHIKent, New Castle52 min
Aug 19, 2:59 PM EDTSevere Thunderstorm WarningPHISussex61 min
Aug 19, 3:53 PM EDTAreal Flood AdvisoryPHIKent, Sussex5 hr
Aug 19, 4:23 PM EDTSevere Thunderstorm WarningPHISussex82 min

Nearby

Special Weather Statements in Delaware, 2011Every 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; radar from the NEXRAD Level II archive.