Alert archive / New Jersey / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 78, NWS Philadelphia/Mount Holly

July 1, 2001Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2001, 4:59 PM EDT for Somerset County, New Jersey. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 1, 2001, 4:59 PM EDT (20:59 UTC)
Expired: Jul 1, 2001, 5:45 PM EDT
In force: 46 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 20:59 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.

Issued	Product	Office	Lasted
Jul 1, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 1, 4:30 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.0 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 012100
SVRPHI

NJC035-012145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
459 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 545 PM EDT.

* AT 454 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... OVER FLEMINGTON...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MILLSTONE...MANVILLE...BOUND BROOK...SOMERVILLE AT 510 PM.

HAIL UP TO ONE INCH IN DIAMETER AND WINDS GREATER THAN 55 MILES AN
HOUR ARE EXPECTED FROM THIS STORM. SEEK SHELTER IN A STURDY STRUCTURE
UNTIL THE STORM HAS PASSED.

HEAVY RAINFALL IS ALSO LIKELY WITH THIS STORM. 
TAKE COVER IN A STURDY BUILDING UNTIL THE STORM HAS PASSED.

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

 
$$

LAT...LON 4060 7488 4042 7489 4041 7459 4064 7447

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, 3:16 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	44 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.