Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 94, NWS Philadelphia/Mount Holly

June 26, 2009Hunterdon County, Morris County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 26, 2009, 5:27 PM EDT for Hunterdon County, Morris County, Somerset County, New Jersey. It was in force for 78 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
Jun 26, 2009, 5:27 PM EDT (21:27 UTC)
Expired
Jun 26, 2009, 6:45 PM EDT
In force
78 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Hunterdon County, NJ, Morris County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 21:29 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
Jun 26, 2:42 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.5 hours before the alert went out and 137 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, Brookhaven, NY at 12:00Z on 2009-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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, Brookhaven, NY at 12:00Z on 2009-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
4 J/kg
Mixed-layer CIN
-380 J/kg
Mixed-layer LCL
1367 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
70 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.

000 
WUUS51 KPHI 262127
SVRPHI
NJC019-027-035-262245-
/O.NEW.KPHI.SV.W.0094.090626T2127Z-090626T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
527 PM EDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MORRIS COUNTY IN NORTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF MORRISTOWN...
  NORTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...
  NORTHERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 645 PM EDT

* AT 525 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING NICKEL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTH OF GREEN POND TO
  BUDD LAKE TO 11 MILES NORTHWEST OF HAMPTON...AND MOVING EAST AT 
  35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GREEN POND...LAKE TELEMARK AND BUDD LAKE AROUND 535 PM EDT...
  HAMPTON AROUND 540 PM EDT...
  GLEN GARDNER...KINNELON AND DOVER AROUND 545 PM EDT...
  LEBANON...HIGH BRIDGE AND CALIFON AROUND 550 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 EDT
FRIDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4089 7433 4086 7431 4078 7437 4074 7436
      4067 7445 4065 7445 4066 7440 4064 7440
      4059 7445 4057 7451 4066 7507 4080 7485
      4090 7478 4091 7466 4096 7464 4108 7451
      4104 7449 4105 7444 4097 7427 4089 7427
TIME...MOT...LOC 2125Z 272DEG 32KT 4111 7449 4093 7468
          4079 7515

$$

SZATKOWSKI

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 26, 4:34 PM EDTSevere Thunderstorm WarningPHISussex86 min
Jun 26, 4:51 PM EDTSevere Thunderstorm WarningPHIWarren69 min
Jun 26, 6:39 PM EDTSpecial Marine WarningPHI51 min
Jun 26, 6:41 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer, Somerset41 min
Jun 26, 6:45 PM EDTSevere Thunderstorm WarningPHIMonmouth30 min
Jun 26, 7:10 PM EDTSevere Thunderstorm WarningPHIBurlington50 min
Jun 26, 7:18 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth, Ocean72 min
Jun 26, 7:28 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Monmouth, Ocean92 min
Jun 26, 7:45 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Ocean65 min
Jun 26, 7:56 PM EDTSpecial Marine WarningPHI64 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2009Every severe thunderstorm warning in 2009

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.