Alert archive / New Jersey / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 63, NWS Philadelphia/Mount Holly

June 30, 2001Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2001, 11:50 PM EDT for Somerset County, New Jersey. It was in force for 25 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: Jun 30, 2001, 11:50 PM EDT (03:50 UTC)
Expired: Jul 1, 2001, 12:15 AM EDT
In force: 25 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 03:50 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
Jun 30, 11:52 PM EDT	Thunderstorm Wind 50 E	Blawenburg, 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 3.8 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: 1564 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 010350
SVRPHI

NJC035-010415-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1150 PM EDT SAT JUN 30 2001

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 1215 AM EDT.

* AT 1145 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... 7 MILES NORTHWEST OF ROCKY HILL...MOVING
  EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROCKY HILL AT 1155 PM.
  MILLSTONE...MANVILLE...SOMERVILLE AT MIDNIGHT.
  BOUND BROOK AT 1205 AM.

DAMAGING WINDS IN EXCESS OF 55 MPH ARE EXPECTED FROM THIS STORM. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED. 
REMEMBER TORNADOES SOMETIMES OCCUR WITH LITTLE OR NO ADVANCED 
WARNING.

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

$$

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, 11:56 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, 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.