Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 119, NWS Philadelphia/Mount Holly

July 23, 2012Monroe County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2012, 7:56 PM EDT for Monroe County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 23, 2012, 7:56 PM EDT (23:56 UTC)
Expired: Jul 23, 2012, 8:55 PM EDT
In force: 59 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 23:58 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 23, 1:24 PM EDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.9 hours before the alert went out and 152 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: 253 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 903 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 69 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.

632 
WUUS51 KPHI 232356
SVRPHI
NJC027-037-041-PAC089-240115-
/O.NEW.KPHI.SV.W.0119.120723T2356Z-120724T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
756 PM EDT MON JUL 23 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
  NORTHERN MORRIS COUNTY IN NORTHERN NEW JERSEY...
  SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  THIS INCLUDES THE CITY OF NEWTON...
  NORTHEASTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...

* UNTIL 915 PM EDT

* AT 753 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  FLATBROOKVILLE...OR 13 MILES WEST OF NEWTON...AND MOVING EAST AT 25
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FIVE POINTS AND CRANDON LAKES AROUND 810 PM EDT...
  BRANCHVILLE AROUND 820 PM EDT...
  NEWTON AROUND 825 PM EDT...
  LAKE MOHAWK AROUND 835 PM EDT...
  OGDENSBURG AND FRANKLIN AROUND 840 PM EDT...
  GREEN POND AROUND 855 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
MONDAY EVENING FOR NEW JERSEY AND EASTERN PENNSYLVANIA.

&&

LAT...LON 4121 7437 4109 7450 4104 7450 4105 7445
      4102 7443 4100 7429 4091 7427 4089 7428
      4090 7433 4082 7432 4077 7437 4107 7532
      4125 7531 4126 7513 4115 7514 4115 7508
      4109 7503 4116 7491 4130 7482
TIME...MOT...LOC 2356Z 277DEG 22KT 4110 7497

$$
NIERENBERG

1 follow-up statement

962 
WWUS51 KPHI 240055
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
855 PM EDT MON JUL 23 2012

NJC027-037-041-PAC089-240105-
/O.CAN.KPHI.SV.W.0119.000000T0000Z-120724T0115Z/
WARREN NJ-MORRIS NJ-SUSSEX NJ-MONROE PA-
855 PM EDT MON JUL 23 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONROE...
SUSSEX...NORTHERN MORRIS AND NORTHEASTERN WARREN COUNTIES IS
CANCELLED...

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT
MONDAY EVENING FOR NORTHERN NEW JERSEY AND NORTHEASTERN PENNSYLVANIA.

LAT...LON 4121 7437 4109 7450 4104 7450 4105 7445
      4102 7443 4100 7429 4091 7427 4089 7428
      4090 7433 4082 7432 4077 7437 4107 7532
      4125 7531 4126 7513 4115 7514 4115 7508
      4109 7503 4116 7491 4130 7482
TIME...MOT...LOC 0055Z 277DEG 22KT 4106 7450

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 4:31 PM EDT	Special Weather Statement	PHI	Berks	59 min
Jul 23, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Lehigh, Montgomery	51 min
Jul 23, 5:56 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Lehigh, Montgomery, Philadelphia	64 min
Jul 23, 6:51 PM EDT	Severe Thunderstorm Warning	PHI	Monroe, Northampton	69 min
Jul 23, 7:39 PM EDT	Flash Flood Warning	PHI	Monroe	2 hr
Jul 23, 11:26 AM EDT	Special Weather Statement	PHI	Sussex	94 min
Jul 23, 12:19 PM EDT	Special Weather Statement	PHI	Sussex	56 min
Jul 23, 12:32 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	73 min
Jul 23, 1:00 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	60 min
Jul 23, 1:11 PM EDT	Flash Flood Warning	PHI	Sussex	3 hr
Jul 23, 1:57 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	78 min
Jul 23, 2:24 PM EDT	Special Weather Statement	PHI	Warren	66 min
Jul 23, 2:44 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Warren	76 min
Jul 23, 2:47 PM EDT	Flash Flood Warning	PHI	Morris, Sussex, Warren	3 hr
Jul 23, 3:42 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Middlesex, Morris, Somerset	78 min
Jul 23, 4:56 PM EDT	Special Weather Statement	PHI	Middlesex, Monmouth, Somerset	94 min
Jul 23, 6:35 PM EDT	Special Weather Statement	PHI	Morris, Sussex	85 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2012 Severe Thunderstorm Warnings in Pennsylvania, 2012 Every severe thunderstorm warning in 2012

Sources

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