Alert archive / New Jersey / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 50, NWS Philadelphia/Mount Holly

May 13, 2002Burlington County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 13, 2002, 5:34 PM EDT for Burlington County, New Jersey. It was in force for 41 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: May 13, 2002, 5:34 PM EDT (21:34 UTC)
Expired: May 13, 2002, 6:15 PM EDT
In force: 41 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Burlington County, NJ

The radar

The Philadelphia radar (KDIX), 23 km from the middle of the area, began a volume at 21:34 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
May 13, 5:55 PM EDT	Hail 1	Chatsworth, 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
May 13, 1:30 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.6 hours before the alert went out and 188 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: 6 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 398 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 208 m²/s²
0-3 km storm-relative helicity: 295 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 132134 CCA
SVRPHI
NJC005-132215-

BULLETIN - EAS ACTIVATION REQUESTED/CORRECTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
532 PM EDT MON MAY 13 2002

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY.

* UNTIL 615 PM EDT.

* AT 529 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... 15 MILES SOUTHWEST OF LEISURETOWNE...MOVING
  EAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LEISURETOWNE AT 545 PM.
  CHATSWORTH...PRESIDENTIAL LAKES...BROWNS MILLS AT 550 PM.

HAIL UP TO GOLFBALL SIZE 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. THIS STORM PRODUCED WIND GUSTS 
UP TO 60 MPH IN WILLIAMSTOWN IN GLOUCESTER COUNTY.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

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

$$

TFG/COR FOR HAIL SIZE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 8:08 PM EDT	Special Marine Warning	PHI		67 min
May 12, 8:08 PM EDT	Special Marine Warning	PHI		67 min
May 12, 8:08 PM EDT	Special Marine Warning	PHI		67 min
May 12, 10:48 PM EDT	Special Marine Warning	PHI		57 min
May 12, 10:48 PM EDT	Special Marine Warning	PHI		57 min
May 12, 10:48 PM EDT	Special Marine Warning	PHI		57 min
May 13, 4:43 PM EDT	Severe Thunderstorm Warning	PHI	Cumberland, Salem	47 min
May 13, 4:58 PM EDT	Tornado Warning	PHI	Salem	32 min
May 13, 5:11 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	34 min
May 13, 5:18 PM EDT	Severe Thunderstorm Warning	PHI	Camden	37 min
May 13, 5:23 PM EDT	Tornado Warning	PHI	Camden, Gloucester	22 min
May 13, 5:33 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	42 min
May 13, 5:41 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic	19 min
May 13, 5:53 PM EDT	Tornado Warning	PHI	Burlington, Ocean	37 min
May 13, 5:58 PM EDT	Special Marine Warning	PHI		92 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2002 Every severe thunderstorm warning in 2002

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.