Alert archive / New Jersey / Special Weather Statements in 2012

Special Weather Statement, NWS Philadelphia/Mount Holly

July 18, 2012Mercer County, New Jersey

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 18, 2012, 4:41 PM EDT for Mercer County, New Jersey. It was in force for 34 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 18, 2012, 4:41 PM EDT (20:41 UTC)
Expired
Jul 18, 2012, 5:15 PM EDT
In force
34 min
Issued by
NWS Philadelphia/Mount Holly

County Mercer County, NJ

The radar

The Philadelphia radar (KDIX), 28 km from the middle of the area, began a volume at 20:44 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, 8.7 hours before the alert went out and 145 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 2012-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 884 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 2012-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
884 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
1666 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
10 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.

074 
WWUS81 KPHI 182041
SPSPHI

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
441 PM EDT WED JUL 18 2012

NJZ013-015-019-020-182115-
MERCER NJ-NORTHWESTERN BURLINGTON NJ-OCEAN NJ-WESTERN MONMOUTH NJ-
441 PM EDT WED JUL 18 2012

...STRONG THUNDERSTORMS WILL AFFECT BURLINGTON...MERCER...MONMOUTH
AND OCEAN COUNTIES...

AT 439 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED NEW 
THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES SOUTHEAST OF 
TRENTON TO 9 MILES SOUTH OF TRENTON TO 11 MILES SOUTH OF 
TRENTON...MOVING EAST AT 20 MPH. THE THUNDERSTORMS WILL BE NEAR 
ALLENTOWN...COLUMBUS AROUND 450 PM...IMLAYSTOWN...GEORGETOWN AROUND 
500 PM...CREAM RIDGE AROUND 505 PM...CLARKSBURG...ROOSEVELT AROUND 
510 PM...SIX FLAGS THEME PARK AND NEW EGYPT AROUND 515 PM.

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

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. DO
NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS
WHEN A THUNDERSTORM APPROACHES.

LAT...LON 4012 7435 4005 7455 4002 7500 4010 7481
      4012 7478 4013 7474 4016 7472 4017 7473
      4022 7469 4024 7424

$$



DRAG

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 12:51 PM EDTSpecial Weather StatementPHISussex54 min
Jul 18, 1:02 PM EDTSevere Thunderstorm WarningPHISussex34 min
Jul 18, 1:11 PM EDTSpecial Weather StatementPHISussex34 min
Jul 18, 1:23 PM EDTSpecial Weather StatementPHIMorris37 min
Jul 18, 1:43 PM EDTAreal Flood AdvisoryPHISussex2 hr
Jul 18, 1:49 PM EDTSevere Thunderstorm WarningPHISussex26 min
Jul 18, 1:53 PM EDTSpecial Weather StatementPHIMercer37 min
Jul 18, 2:15 PM EDTSpecial Weather StatementPHISussex60 min
Jul 18, 2:23 PM EDTSpecial Weather StatementPHIWarren67 min
Jul 18, 2:46 PM EDTSevere Thunderstorm WarningPHIMiddlesex29 min
Jul 18, 3:00 PM EDTSpecial Weather StatementPHIMonmouth45 min
Jul 18, 3:04 PM EDTSpecial Weather StatementPHIWarren41 min
Jul 18, 3:13 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren47 min
Jul 18, 3:18 PM EDTSpecial Marine WarningPHI42 min
Jul 18, 3:25 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex65 min
Jul 18, 3:26 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Warren49 min
Jul 18, 3:29 PM EDTSpecial Weather StatementPHIMonmouth46 min
Jul 18, 3:43 PM EDTSpecial Weather StatementPHIWarren47 min
Jul 18, 3:52 PM EDTFlash Flood WarningPHIWarren113 min
Jul 18, 3:59 PM EDTFlash Flood WarningPHIMorris, Sussex107 min
Jul 18, 4:03 PM EDTSpecial Weather StatementPHIHunterdon42 min
Jul 18, 4:17 PM EDTSpecial Weather StatementPHIMorris43 min
Jul 18, 4:28 PM EDTSevere Thunderstorm WarningPHIHunterdon32 min
Jul 18, 4:30 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Morris, Somerset45 min
Jul 18, 4:53 PM EDTSpecial Weather StatementPHIMercer22 min
Jul 18, 5:01 PM EDTSpecial Weather StatementPHIMiddlesex29 min
Jul 18, 5:07 PM EDTSpecial Marine WarningPHI38 min
Jul 18, 5:11 PM EDTSpecial Weather StatementPHIMiddlesex, Somerset64 min
Jul 18, 5:12 PM EDTAreal Flood AdvisoryPHIHunterdon, Middlesex, Somerset81 min
Jul 18, 5:19 PM EDTSevere Thunderstorm WarningPHIMonmouth41 min
Jul 18, 5:26 PM EDTSpecial Marine WarningPHI34 min
Jul 18, 5:33 PM EDTSpecial Weather StatementPHIMercer57 min
Jul 18, 5:44 PM EDTSpecial Marine WarningPHI31 min
Jul 18, 6:00 PM EDTSpecial Marine WarningPHI60 min
Jul 18, 6:09 PM EDTAreal Flood AdvisoryPHIBurlington, Monmouth, Ocean68 min
Jul 18, 6:32 PM EDTSpecial Weather StatementPHIOcean43 min
Jul 18, 6:45 PM EDTSpecial Weather StatementPHICape May, Cumberland60 min
Jul 18, 6:51 PM EDTSpecial Marine WarningPHI39 min
Jul 18, 6:51 PM EDTSpecial Marine WarningPHI39 min
Jul 18, 7:17 PM EDTSpecial Weather StatementPHICape May58 min
Jul 18, 1:27 PM EDTSpecial Weather StatementPHIMonroe33 min
Jul 18, 2:07 PM EDTSpecial Weather StatementPHIBerks38 min
Jul 18, 2:12 PM EDTSevere Thunderstorm WarningPHIBerks48 min
Jul 18, 2:43 PM EDTSpecial Weather StatementPHIBerks, Lehigh47 min
Jul 18, 3:36 PM EDTSpecial Weather StatementPHIBerks54 min
Jul 18, 3:51 PM EDTSevere Thunderstorm WarningPHIBerks, Chester, Montgomery28 min
Jul 18, 4:22 PM EDTSpecial Weather StatementPHIBucks23 min
Jul 18, 5:30 PM EDTSpecial Weather StatementPHIBucks60 min
Jul 18, 5:51 PM EDTSpecial Weather StatementPHIPhiladelphia54 min
Jul 18, 5:47 PM EDTSpecial Weather StatementPHIKent, New Castle58 min
Jul 18, 6:01 PM EDTSevere Thunderstorm WarningPHIKent, New Castle17 min
Jul 18, 6:23 PM EDTSevere Thunderstorm WarningPHIKent37 min
Jul 18, 6:48 PM EDTSpecial Weather StatementPHIKent12 min
Jul 18, 6:57 PM EDTAreal Flood AdvisoryPHIKent, Sussex82 min
Jul 18, 6:57 PM EDTSevere Thunderstorm WarningPHIKent17 min
Jul 18, 4:37 PM EDTSpecial Weather StatementPHIKent23 min
Jul 18, 4:47 PM EDTSpecial Weather StatementPHICecil28 min
Jul 18, 5:20 PM EDTSpecial Weather StatementPHIQueen Anne's40 min
Jul 18, 5:35 PM EDTSevere Thunderstorm WarningPHIKent, Queen Anne's25 min
Jul 18, 6:06 PM EDTSevere Thunderstorm WarningPHICaroline, Kent, Queen Anne's, Talbot39 min
Jul 18, 6:26 PM EDTAreal Flood AdvisoryPHICaroline, Kent, Queen Anne's, Talbot68 min

Nearby

Special Weather Statements in New Jersey, 2012Every 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.