Alert archive / New Jersey / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 235, NWS Philadelphia/Mount Holly

October 11, 2007Morris County, Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Oct 11, 2007, 3:14 PM EDT for Morris County, Sussex County, New Jersey. It was in force for 61 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Oct 11, 2007, 3:14 PM EDT (19:14 UTC)
Expired
Oct 11, 2007, 4:15 PM EDT
In force
61 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Morris County, NJ, Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 121 km from the middle of the area, began a volume at 19:15 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
Oct 11, 3:40 PM EDTHAIL 0.56 Wsw Dover, NJHAIL UP TO DIME SIZE REPORTED IN ROXBURY TOWNSHIP.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.2 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2007-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2007-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 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
6 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
110 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 111915
SVRPHI
NJC027-037-112015-
/O.NEW.KPHI.SV.W.0235.071011T1914Z-071011T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
314 PM EDT THU OCT 11 2007

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

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

* UNTIL 415 PM EDT

* AT 312 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR BUDD LAKE...OR
  ABOUT 28 MILES WEST OF CLIFTON...AND MOVING NORTHEAST AT 30 MPH.
  ANOTHER STRONG STORM WAS IN SOUTHERN SUSSEX COUNTY AND MOVING
  NORTHEAST AT 25 TO 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STANHOPE BY 320 PM EDT...
  HOPATCONG AND ANDOVER BY 325 PM EDT...
  LAKE MOHAWK BY 335 PM EDT...
  OGDENSBURG AND FRANKLIN BY 345 PM EDT...
  HAMBURG BY 355 PM EDT...
  HIGHLAND LAKE BY 400 PM EDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

LAT...LON 4132 7462 4119 7437 4108 7449 4104 7449
      4105 7444 4102 7441 4101 7439 4101 7435
      4100 7434 4073 7466 4077 7487 4091 7477
TIME...MOT...LOC 1914Z 204DEG 27KT 4087 7469

$$

RPW
1 follow-up statement
000 
WWUS51 KPHI 111950
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
348 PM EDT THU OCT 11 2007

NJC027-037-112015-
/O.CON.KPHI.SV.W.0235.000000T0000Z-071011T2015Z/
SUSSEX NJ-MORRIS NJ-
348 PM EDT THU OCT 11 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR NORTH CENTRAL MORRIS AND EASTERN SUSSEX COUNTIES...

AT 348 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR
HOPATCONG...OR ABOUT 23 MILES WEST OF PATERSON...MOVING NORTHEAST AT
20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  LAKE MOHAWK AND LAKE TELEMARK BY 355 PM EDT...
  OGDENSBURG AND GREEN POND BY 405 PM EDT...
  FRANKLIN...HAMBURG AND 7 MILES SOUTHWEST OF HIGHLAND LAKE BY 415 PM
  EDT...

SEVERAL OTHER STRONG STORMS CONTINUE MOVING NORTHEAST ACROSS SUSSEX 
COUNTY.

LAT...LON 4119 7437 4108 7449 4103 7449 4105 7444
      4102 7441 4101 7438 4101 7437 4100 7440
      4082 7465 4091 7477 4132 7462
TIME...MOT...LOC 1948Z 209DEG 18KT 4097 7460

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 11, 3:48 AM EDTSpecial Marine WarningPHI57 min
Oct 11, 4:15 AM EDTTornado WarningPHICumberland30 min
Oct 11, 4:47 AM EDTSpecial Marine WarningPHI88 min
Oct 11, 6:15 AM EDTSpecial Marine WarningPHI45 min
Oct 11, 6:18 AM EDTSpecial Marine WarningPHI27 min
Oct 11, 2:22 PM EDTSevere Thunderstorm WarningPHIMercer, Middlesex, Monmouth38 min
Oct 11, 2:31 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Warren44 min
Oct 11, 3:07 PM EDTSevere Thunderstorm WarningPHIMiddlesex38 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2007Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.