Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 211, NWS Philadelphia/Mount Holly

August 17, 2007Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2007, 5:46 PM EDT for Somerset County, New Jersey. It was in force for 59 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 17, 2007, 5:46 PM EDT (21:46 UTC)
Expired: Aug 17, 2007, 6:45 PM EDT
In force: 59 min
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

County Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 21:52 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.

What was reported inside it

Time	Report	Where	Remark
Aug 17, 6:15 PM EDT	HAIL 1	2 Ne Belle Mead, NJ	HAIL RANGING FROM THE SIZE OF NICKELS TO QUARTERS WAS REPORTED IN HILLSBOROUGH.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 17, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.8 hours before the alert went out and 149 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 120 J/kg
Mixed-layer CIN: -267 J/kg
Mixed-layer LCL: 1465 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 172146
SVRPHI
NJC035-172245-
/O.NEW.KPHI.SV.W.0211.070817T2146Z-070817T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
546 PM EDT FRI AUG 17 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 645 PM EDT

* AT 543 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  WEST OF PEAPACK AND GLADSTONE...OR ABOUT 22 MILES NORTHWEST OF NEW
  BRUNSWICK...AND MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FAR HILLS AND BRIDGEWATER BY 555 PM EDT...
  BASKING RIDGE...SOMERVILLE AND 7 MILES NORTH OF MANVILLE BY 600 PM
  EDT...
  MARTINSVILLE AND BOUND BROOK BY 605 PM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FRIDAY
EVENING FOR NORTHERN DELAWARE AND NEW JERSEY AND EASTERN
PENNSYLVANIA.

LAT...LON 4064 7443 4058 7448 4055 7453 4053 7451
      4039 7462 4045 7475 4050 7479 4057 7471
      4062 7471 4065 7474 4067 7472 4071 7473
      4074 7462 4073 7457 4069 7451 4064 7452
      4066 7446
TIME...MOT...LOC 2146Z 288DEG 33KT 4068 7474

$$

JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 10:32 PM EDT	Special Marine Warning	PHI		43 min
Aug 16, 11:12 PM EDT	Special Marine Warning	PHI		63 min
Aug 16, 11:27 PM EDT	Special Marine Warning	PHI		48 min
Aug 16, 11:36 PM EDT	Special Marine Warning	PHI		39 min
Aug 17, 12:29 AM EDT	Special Marine Warning	PHI		46 min
Aug 17, 2:20 PM EDT	Severe Thunderstorm Warning	PHI	Warren	70 min
Aug 17, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	62 min
Aug 17, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	55 min
Aug 17, 3:17 PM EDT	Tornado Warning	PHI	Warren	43 min
Aug 17, 3:20 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	55 min
Aug 17, 3:36 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	69 min
Aug 17, 3:46 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris	49 min
Aug 17, 3:59 PM EDT	Special Marine Warning	PHI		2 hr
Aug 17, 4:09 PM EDT	Severe Thunderstorm Warning	PHI	Camden	36 min
Aug 17, 4:11 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	49 min
Aug 17, 4:45 PM EDT	Severe Thunderstorm Warning	PHI	Warren	60 min
Aug 17, 5:17 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	58 min
Aug 17, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Morris	64 min
Aug 17, 6:27 PM EDT	Special Marine Warning	PHI		93 min
Aug 17, 6:40 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	35 min
Aug 17, 7:47 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	58 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.