Alert archive / New Jersey / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 70, NWS Philadelphia/Mount Holly

July 1, 2001Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2001, 3:16 PM EDT for Somerset County, New Jersey. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 1, 2001, 3:16 PM EDT (19:16 UTC)
Expired: Jul 1, 2001, 4:00 PM EDT
In force: 44 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 71 km from the middle of the area, began a volume at 19:16 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
Jul 1, 3:30 PM EDT	Thunderstorm Wind 52 E	Peapack, NJ

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 1, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.3 hours before the alert went out and 151 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: 301 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 011918
SVRPHI

NJC035-012000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
316 PM EDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 400 PM EDT.

* AT 311 PM EDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM...IN
  CENTRAL HUNTERDON COUNTY...MOVING EAST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SOMERVILLE...MANVILLE...MILLSTONE...FAR HILLS AT 335 PM.
  BOUND BROOK AT 340 PM.

HAIL UP TO THE SIZE OF GOLFBALLS...WINDS GREATER THAN 55
MILES AN HOUR...ARE EXPECTED FROM THIS STORM. SEEK SHELTER IN A
STURDY STRUCTURE UNTIL THE STORM HAS PASSED. THIS STORM HAS 
HAD A HISTORY OF PRODUCING MARBLE TO GOLF BALL SIZE HAIL FROM
LEHIGH COUNTY EAST THROUGH HUNTERDON COUNTY. 

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM SUNDAY
EVENING FOR NORTHWESTERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 6$00 PM SUNDAY EVENING FOR NORTHWESTERN NEW
JERSEY AND EASTERN PENNSYLVANIA.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 10:31 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	44 min
Jun 30, 11:50 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	25 min
Jun 30, 11:56 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	34 min
Jul 1, 2:44 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	61 min
Jul 1, 3:45 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	45 min
Jul 1, 4:06 PM EDT	Severe Thunderstorm Warning	PHI	Sussex, Warren	39 min
Jul 1, 4:23 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris	52 min
Jul 1, 4:59 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	46 min
Jul 1, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex	45 min
Jul 1, 5:26 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	49 min
Jul 1, 5:39 PM EDT	Tornado Warning	PHI	Monmouth	36 min
Jul 1, 5:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Ocean	46 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2001 Every severe thunderstorm warning in 2001

Sources

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