Alert archive / New Jersey / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 5, NWS Philadelphia/Mount Holly

March 21, 2003Middlesex County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Mar 21, 2003, 5:07 PM EST for Middlesex County, Somerset County, New Jersey. It was in force for 33 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: Mar 21, 2003, 5:07 PM EST (22:07 UTC)
Expired: Mar 21, 2003, 5:40 PM EST
In force: 33 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Middlesex County, NJ, Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 62 km from the middle of the area, began a volume at 22:06 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.1 hours before the alert went out and 145 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 425 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

070 
WUUS51 KPHI 212207
SVRPHI
NJC023-035-212240-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
507 PM EST FRI MAR 21 2003

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL SOMERSET COUNTY IN NORTHERN NEW JERSEY.
  NORTHEASTERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY.

* UNTIL 540 PM EST.

* AT 456 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... 3 MILES WEST OF NORTH BRUNSWICK...MOVING
  NORTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SOCIETY HILL...MIDDLESEX AT 515 PM.
  EDISON...SAYREVILLE AT 520 PM.
  PERTH AMBOY AT 525 PM.
  COLONIA...CARTERET AT 530 PM.

HAIL...3/4 INCHES OR GREATER...IS EXPECTED FROM THIS STORM. IF YOU 
ARE IN THE STORMS PATH...SEEK SHELTER INDOORS.

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

$$

LAT...LON 4052 7462 4038 7439 4063 7413 4074 7430

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 21, 4:34 PM EST	Severe Thunderstorm Warning	PHI	Mercer	26 min
Mar 21, 4:43 PM EST	Severe Thunderstorm Warning	PHI	Atlantic	32 min
Mar 21, 4:49 PM EST	Severe Thunderstorm Warning	PHI	Middlesex, Somerset	26 min
Mar 21, 5:28 PM EST	Severe Thunderstorm Warning	PHI	Morris	22 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.