Alert archive / New Jersey / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 74, NWS Philadelphia/Mount Holly

July 1, 2001Hunterdon County, Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 1, 2001, 4:23 PM EDT for Hunterdon County, Morris County, New Jersey. It was in force for 52 min. 2 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
Jul 1, 2001, 4:23 PM EDT (20:23 UTC)
Expired
Jul 1, 2001, 5:15 PM EDT
In force
52 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties Hunterdon County, NJ, Morris County, NJ

The radar

The Philadelphia radar (KDIX), 89 km from the middle of the area, began a volume at 20:23 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

TimeReportWhereRemark
Jul 1, 4:35 PM EDTThunderstorm Wind 50 ECountywide, NJ
Jul 1, 4:50 PM EDTThunderstorm Wind 50 EDover, 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.

IssuedProductOfficeLasted
Jul 1, 12:00 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 1, 3:00 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.4 hours before the alert went out and 158 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2001-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 301 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2001-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
301 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
1284 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 012025
SVRPHI

NJC019-027-012115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
423 PM EDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 515 PM EDT.

* AT 418 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM... ALONG A LINE EXTENDING FROM 5 MILES EAST OF
  HIGHLAND LAKE TO 10 MILES SOUTHWEST OF GLEN GARDNER...MOVING
  SOUTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CHESTER...SUCCASUNNA AT 430 PM.
  DOVER...LAKE TELEMARK...LEBANON AT 435 PM.
  FLEMINGTON...KINNELON...WHITE HOUSE STATION AT 445 PM.
  BOONTON AT 450 PM.

DAMAGING WINDS IN EXCESS OF 55 MPH ARE EXPECTED FROM THIS STORM.  
HAIL UP TO ONE INCH IN DIAMETER IS ALSO EXPECTED FROM THIS STORM.  
SEEK SHELTER IMMEDIATELY IF YOU SEE THREATENING WEATHER.

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 900 PM SUNDAY
EVENING FOR NORTHWESTERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 900 PM SUNDAY EVENING FOR NORTHERN DELAWARE
AND NORTHEAST MARYLAND AND NORTHWESTERN NEW JERSEY AND SOUTHEASTERN
PENNSYLVANIA. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT
UNTIL 600 PM SUNDAY EVENING FOR NORTHWESTERN NEW JERSEY AND EASTERN
PENNSYLVANIA.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 10:31 PM EDTSevere Thunderstorm WarningPHIMorris, Sussex44 min
Jun 30, 11:50 PM EDTSevere Thunderstorm WarningPHISomerset25 min
Jun 30, 11:56 PM EDTSevere Thunderstorm WarningPHIMiddlesex34 min
Jul 1, 2:44 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren61 min
Jul 1, 3:16 PM EDTSevere Thunderstorm WarningPHISomerset44 min
Jul 1, 3:45 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth45 min
Jul 1, 4:06 PM EDTSevere Thunderstorm WarningPHISussex, Warren39 min
Jul 1, 4:59 PM EDTSevere Thunderstorm WarningPHISomerset46 min
Jul 1, 5:15 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex45 min
Jul 1, 5:26 PM EDTSevere Thunderstorm WarningPHIMonmouth49 min
Jul 1, 5:39 PM EDTTornado WarningPHIMonmouth36 min
Jul 1, 5:59 PM EDTSevere Thunderstorm WarningPHIBurlington, Ocean46 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2001Every severe thunderstorm warning in 2001

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.