Alert archive / New Jersey / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 73, NWS Philadelphia/Mount Holly

July 21, 2003Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2003, 9:01 PM EDT for Somerset County, New Jersey. It was in force for 89 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 21, 2003, 9:01 PM EDT (01:01 UTC)
Expired: Jul 21, 2003, 10:30 PM EDT
In force: 89 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 01:01 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 21, 6:30 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.0 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: 250 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 220101
SVRPHI
NJC035-220230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
900 PM EDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 1030 PM EDT.

* AT 855 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SEVERE THUNDERSTORMS...ALONG A LINE EXTENDING ACROSS MORRIS COUNTY 
  AND HUNTERDON COUNTY...MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  FAR HILLS AT 920 PM.
  SOMERVILLE...MILLSTONE...MANVILLE AT 955 PM.
  BOUND BROOK AT 1000 PM.
  MIDDLESEX AT 1005 PM.

DAMAGING WINDS IN EXCESS OF 55 MPH ARE EXPECTED FROM THIS STORM. SEEK
SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.

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 1100 PM.

$$

LAT...LON 4073 7459 4068 7471 4039 7469 4062 7445

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:07 PM EDT	Severe Thunderstorm Warning	PHI	Morris	83 min
Jul 21, 8:36 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	84 min
Jul 22, 2:10 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	50 min
Jul 22, 2:22 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden	38 min
Jul 22, 3:35 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon	40 min
Jul 22, 3:48 PM EDT	Severe Thunderstorm Warning	PHI	Somerset	42 min
Jul 22, 4:17 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex	43 min
Jul 22, 4:45 PM EDT	Flash Flood Warning	PHI	Middlesex	105 min
Jul 22, 5:22 PM EDT	Special Marine Warning	PHI		83 min
Jul 22, 5:49 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland	41 min
Jul 22, 5:56 PM EDT	Severe Thunderstorm Warning	PHI	Cape May	49 min
Jul 22, 6:00 PM EDT	Special Marine Warning	PHI		60 min
Jul 22, 6:22 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic	38 min
Jul 22, 6:43 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden	47 min
Jul 22, 6:59 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	61 min
Jul 22, 7:29 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth	76 min
Jul 22, 7:40 PM EDT	Special Marine Warning	PHI		80 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2003 Every severe thunderstorm warning in 2003

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.