Alert archive / New Jersey / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 15, NWS Philadelphia/Mount Holly

April 19, 2002Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 19, 2002, 5:02 PM EDT for Morris County, New Jersey. It was in force for 43 min. 4 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: Apr 19, 2002, 5:02 PM EDT (21:02 UTC)
Expired: Apr 19, 2002, 5:45 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Whole counties

County Morris County, NJ

What was reported inside it

Time	Report	Where
Apr 19, 5:15 PM EDT	Thunderstorm Wind 57 E	Butler, NJ
Apr 19, 5:15 PM EDT	Thunderstorm Wind 56 E	Woodstock, NJ
Apr 19, 5:30 PM EDT	Thunderstorm Wind 61 E	Morris Plains, NJ
Apr 19, 5:30 PM EDT	Hail 1	Whippany, 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 12:00Z, 9.0 hours before the alert went out and 141 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: 19 J/kg
Mixed-layer CIN: -368 J/kg
Mixed-layer LCL: 1055 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 102 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 192102
SVRPHI
NJC027-192145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
501 PM EDT FRI APR 19 2002

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 545 PM EDT.

* AT 457 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... OVER LONG VALLEY...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  DOVER AT 515 PM.
  MORRISTOWN...LAKE TELEMARK AT 520 PM.
  PARSIPPANY...BOONTON...KINNELON AT 525 PM.

LARGE HAIL...DAMAGING WINDS...AND HEAVY RAINFALL ARE LIKELY WITH THIS
STORM. TAKE COVER IN A STURDY BUILDING 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.

$$

LAT...LON 4089 7475 4075 7479 4076 7441 4089 7433
          4103 7441

WN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 3:48 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	27 min
Apr 19, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	35 min
Apr 19, 6:24 PM EDT	Special Marine Warning	PHI		66 min
Apr 19, 6:35 PM EDT	Special Marine Warning	PHI		85 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.