Alert archive / New Jersey / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 153, NWS Philadelphia/Mount Holly

July 23, 2008Hunterdon County, Mercer County, Somerset County, New Jersey; Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2008, 5:03 PM EDT for Hunterdon County, Mercer County, Somerset County, New Jersey; Bucks County, Pennsylvania. It was in force for 57 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 23, 2008, 5:03 PM EDT (21:03 UTC)
Expired
Jul 23, 2008, 6:00 PM EDT
In force
57 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Hunterdon County, NJ, Mercer County, NJ, Somerset County, NJ, Bucks County, PA

The radar

The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 21:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 23, 2:34 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.1 hours before the alert went out and 146 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 2008-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1012 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, Phillips Aaf/Abe, MD at 12:00Z on 2008-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -61 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
1012 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
980 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
-61 m²/s²
0-3 km storm-relative helicity
-48 m²/s²
Significant tornado parameter
-0.4
Supercell composite
-7.5

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 232103
SVRPHI
NJC019-021-035-PAC017-232200-
/O.NEW.KPHI.SV.W.0153.080723T2103Z-080723T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
503 PM EDT WED JUL 23 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN MERCER COUNTY IN CENTRAL NEW JERSEY...
  SOUTHWESTERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  SOUTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
  CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...

* UNTIL 600 PM EDT

* AT 500 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  RICHBORO...AND MOVING NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  WASHINGTON CROSSING BY 520 PM...
  NEW HOPE BY 525 PM...
  STOCKTON BY 530 PM...
  SERGEANTSVILLE BY 535 PM...
  SAND BROOK BY 540 PM...
  FLEMINGTON AND CLOVERHILL BY 550 PM...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM WEDNESDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

LAT...LON 4063 7494 4049 7460 4015 7495 4022 7515
TIME...MOT...LOC 2103Z 206DEG 24KT 4023 7502

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 3:02 AM EDTSpecial Marine WarningPHI58 min
Jul 23, 3:51 AM EDTFlash Flood WatchPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more25 hr
Jul 23, 2:44 PM EDTSevere Thunderstorm WarningPHICumberland, Salem46 min
Jul 23, 2:55 PM EDTSevere Thunderstorm WarningPHIMercer35 min
Jul 23, 2:58 PM EDTSevere Thunderstorm WarningPHIHunterdon47 min
Jul 23, 3:26 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Somerset64 min
Jul 23, 3:30 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem60 min
Jul 23, 4:03 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Morris, Somerset57 min
Jul 23, 4:09 PM EDTTornado WarningPHIMiddlesex, Somerset36 min
Jul 23, 4:51 PM EDTAreal Flood WarningPHIMiddlesex, Somerset105 min
Jul 23, 5:13 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Somerset62 min
Jul 23, 7:00 PM EDTSevere Thunderstorm WarningPHIGloucester, Salem60 min
Jul 23, 7:10 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Morris, Somerset35 min
Jul 23, 7:48 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester57 min
Jul 23, 4:23 AM EDTAreal Flood AdvisoryPHIBucks, Chester, Montgomery3 hr
Jul 23, 3:58 PM EDTSevere Thunderstorm WarningPHIChester, Delaware, Montgomery62 min
Jul 23, 4:27 PM EDTSevere Thunderstorm WarningPHIChester, Delaware38 min
Jul 23, 4:47 PM EDTSevere Thunderstorm WarningPHIBerks, Bucks, Lehigh, Montgomery, Northampton58 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2008Severe Thunderstorm Warnings in Pennsylvania, 2008Every severe thunderstorm warning in 2008

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.