Alert archive / New Jersey / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 128, NWS Philadelphia/Mount Holly

June 27, 2002Hunterdon County, Warren County, New Jersey; Bucks County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 27, 2002, 4:33 PM EDT for Hunterdon County, Warren County, New Jersey; Bucks County, Northampton County, Pennsylvania. It was in force for 37 min. 3 reports 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 27, 2002, 4:33 PM EDT (20:33 UTC)
Expired: Jun 27, 2002, 5:10 PM EDT
In force: 37 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 95 km from the middle of the area, began a volume at 20:32 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
Jun 27, 4:37 PM EDT	Thunderstorm Wind 50 E	Pleasant Vly, PA
Jun 27, 4:40 PM EDT	Thunderstorm Wind 56 E	Hellertown, PA
Jun 27, 4:47 PM EDT	Thunderstorm Wind 61 E	Countywide, 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
Jun 27, 2:00 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.6 hours before the alert went out and 155 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: 287 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1213 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 76 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.

000 
WUUS51 KPHI 272033
SVRPHI
NJC019-041-PAC017-095-272110-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
432 PM EDT THU JUN 27 2002

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA.
  SOUTHWESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY.
  WESTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY.
  NORTHEASTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA.

* UNTIL 510 PM EDT.

* AT 427 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM...10 MILES SOUTHWEST OF OLD ORCHARD...MOVING
  EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ALPHA AT 445 PM.
  MILFORD AT 450 PM.
  FRENCHTOWN...BLOOMSBURY AT 455 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.

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 800 PM THURSDAY
EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN PENNSYLVANIA.

$$

LAT...LON 4066 7534 4044 7533 4044 7502 4067 7503
          4066 7521

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 5:05 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Somerset	40 min
Jun 27, 5:18 PM EDT	Tornado Warning	PHI	Hunterdon, Somerset	27 min
Jun 27, 5:44 PM EDT	Tornado Warning	PHI	Middlesex, Somerset	36 min
Jun 27, 7:13 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	47 min
Jun 27, 7:37 PM EDT	Special Marine Warning	PHI		113 min
Jun 27, 7:44 PM EDT	Severe Thunderstorm Warning	PHI	Mercer, Middlesex, Somerset	46 min
Jun 27, 4:05 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Northampton	25 min
Jun 27, 5:36 PM EDT	Severe Thunderstorm Warning	PHI	Berks	39 min
Jun 27, 6:05 PM EDT	Tornado Warning	PHI	Berks	55 min
Jun 27, 6:30 PM EDT	Severe Thunderstorm Warning	PHI	Carbon, Lehigh, Northampton	60 min
Jun 27, 6:55 PM EDT	Flash Flood Warning	PHI	Berks	3 hr
Jun 27, 7:59 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	31 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2002 Severe Thunderstorm Warnings in Pennsylvania, 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.