Alert archive / New Jersey / Special Weather Statements in 2011

Special Weather Statement, NWS Philadelphia/Mount Holly

April 27, 2011Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this special weather statement at Apr 27, 2011, 4:16 PM EDT for Salem County, New Jersey; New Castle County, Delaware. It was in force for 59 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
Apr 27, 2011, 4:16 PM EDT (20:16 UTC)
Expired
Apr 27, 2011, 5:15 PM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly

Counties New Castle County, DE, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 74 km from the middle of the area, began a volume at 20:18 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.3 hours before the alert went out and 42 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 139 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2011-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.193958Sfc1 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
139 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
640 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
84 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.

633 
WWUS81 KPHI 272016
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
416 PM EDT WED APR 27 2011

DEZ001-002-MDZ012-015-NJZ016-272115-
KENT MD-KENT DE-NEW CASTLE DE-QUEEN ANNE'S MD-SALEM NJ-
416 PM EDT WED APR 27 2011

...A STRONG THUNDERSTORM WILL AFFECT KENT...NEW CASTLE...QUEEN ANNE'S
AND SALEM COUNTIES...

AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES WEST OF DOVER...MOVING NORTH AT 30 MPH.
THE THUNDERSTORM WILL BE NEAR GREEN SPRING...CLAYTON AROUND 430 PM...
ODESSA...MIDDLETOWN AROUND 445 PM...PORT PENN AND PENNSVILLE AROUND
500 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.

LAT...LON 3938 7584 3939 7577 3955 7578 3970 7573
      3967 7555 3962 7560 3959 7559 3966 7552
      3962 7531 3938 7544 3943 7548 3946 7555
      3950 7557 3958 7554 3958 7556 3946 7558
      3934 7547 3913 7557 3918 7586

$$

HEAVENER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 9:25 PM EDTMarine Dense Fog AdvisoryPHI6 hr
Apr 27, 12:08 AM EDTSpecial Weather StatementPHIMorris, Sussex, Warren67 min
Apr 27, 12:34 AM EDTSevere Thunderstorm WarningPHIMorris, Sussex, Warren56 min
Apr 27, 12:43 AM EDTSpecial Weather StatementPHIHunterdon, Somerset62 min
Apr 27, 1:19 AM EDTSpecial Weather StatementPHIHunterdon, Mercer, Middlesex, Somerset56 min
Apr 27, 3:25 AM EDTSpecial Weather StatementPHIHunterdon, Morris65 min
Apr 27, 3:30 AM EDTFlood WatchPHIMercer, Middlesex, Morris, Somerset12 hr
Apr 27, 2:31 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester44 min
Apr 27, 3:26 PM EDTFlash Flood WatchPHIHunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more24 hr
Apr 27, 3:29 PM EDTSpecial Weather StatementPHIMorris, Somerset61 min
Apr 27, 3:39 PM EDTSevere Thunderstorm WarningPHIMorris, Somerset, Sussex66 min
Apr 27, 4:43 PM EDTSpecial Weather StatementPHICamden, Cumberland, Gloucester, Salem62 min
Apr 27, 4:43 PM EDTSevere Thunderstorm WarningPHICumberland, Gloucester, Salem36 min
Apr 27, 4:50 PM EDTSpecial Marine WarningPHI12 min
Apr 27, 5:22 PM EDTSpecial Weather StatementPHIBurlington, Camden, Gloucester83 min
Apr 26, 10:01 PM EDTSpecial Weather StatementPHICarbon59 min
Apr 26, 10:55 PM EDTSpecial Weather StatementPHIMonroe50 min
Apr 26, 11:10 PM EDTSpecial Weather StatementPHIBerks65 min
Apr 26, 11:34 PM EDTSevere Thunderstorm WarningPHIBerks, Carbon56 min
Apr 26, 11:41 PM EDTSpecial Weather StatementPHIMonroe64 min
Apr 26, 11:45 PM EDTSpecial Weather StatementPHILehigh, Northampton60 min
Apr 27, 1:48 PM EDTSpecial Weather StatementPHIDelaware, Montgomery, Philadelphia87 min
Apr 27, 3:28 PM EDTSpecial Weather StatementPHICaroline, Queen Anne's, Talbot62 min

Nearby

Special Weather Statements in New Jersey, 2011Special 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.