Alert archive / New Jersey / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 114, NWS Philadelphia/Mount Holly

July 23, 2012Sussex County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 23, 2012, 1:57 PM EDT for Sussex County, New Jersey. It was in force for 78 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: Jul 23, 2012, 1:57 PM EDT (17:57 UTC)
Expired: Jul 23, 2012, 3:15 PM EDT
In force: 78 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County Sussex County, NJ

The radar

The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 18:01 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	Remark
Jul 23, 2:15 PM EDT	TSTM WND DMG	Andover, NJ	TREES DOWN.

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

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, 6.0 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-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.

448 
WUUS51 KPHI 231757
SVRPHI
NJC037-231915-
/O.NEW.KPHI.SV.W.0114.120723T1757Z-120723T1915Z/

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

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  THIS INCLUDES THE CITY OF NEWTON...

* UNTIL 315 PM EDT

* AT 152 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
  CRANDON LAKES...OR 6 MILES NORTHWEST OF NEWTON...AND MOVING
  SOUTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NEWTON AROUND 220 PM EDT...
  ANDOVER AND 7 MILES SOUTHWEST OF FRANKLIN AROUND 240 PM EDT...
  LAKE MOHAWK AND OGDENSBURG AROUND 245 PM EDT...
  HOPATCONG AROUND 300 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 NORTHERN NEW JERSEY AND NORTHEASTERN PENNSYLVANIA.

&&

LAT...LON 4109 7451 4098 7462 4092 7473 4091 7477
      4111 7497 4117 7489 4124 7487
TIME...MOT...LOC 1756Z 311DEG 11KT 4111 7481

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
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, 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, 5:56 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Hunterdon, Mercer	64 min
Jul 23, 6:35 PM EDT	Special Weather Statement	PHI	Morris, Sussex	85 min
Jul 23, 6:51 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	69 min
Jul 23, 7:39 PM EDT	Flash Flood Warning	PHI	Sussex, Warren	2 hr
Jul 23, 7:56 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex, Warren	59 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.