Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 237, NWS Philadelphia/Mount Holly

August 9, 2011Mercer County, Middlesex County, Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 9, 2011, 2:22 PM EDT for Mercer County, Middlesex County, Monmouth County, New Jersey. It was in force for 53 min. 2 reports 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: Aug 9, 2011, 2:22 PM EDT (18:22 UTC)
Expired: Aug 9, 2011, 3:15 PM EDT
In force: 53 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 51 km from the middle of the area, began a volume at 18:25 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
Aug 9, 2:25 PM EDT	FUNNEL CLOUD	Millstone Twp, NJ
Aug 9, 2:30 PM EDT	TORNADO	Bergen Mills, NJ	A EF-0 TORNADO WITH 70 MPH MAXIMUM WINDS... 50 YARD PATH WIDTH AND 1 2 MILE PATH LENGTH. NO INJURIES OR DEATHS OCCURED.

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, 6.4 hours before the alert went out and 123 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: 171 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 860 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

415 
WUUS51 KPHI 091822
SVRPHI
NJC021-023-025-091915-
/O.NEW.KPHI.SV.W.0237.110809T1822Z-110809T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
222 PM EDT TUE AUG 9 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL MERCER COUNTY IN CENTRAL NEW JERSEY...
  MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  SOUTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 315 PM EDT

* AT 220 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  MANALAPAN...OR 15 MILES SOUTH OF NEW BRUNSWICK...AND MOVING
  NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  JAMESBURG AROUND 230 PM EDT...
  YORKETOWN AND WEST FREEHOLD AROUND 240 PM EDT...
  ROBERTSVILLE AND EAST FREEHOLD AROUND 255 PM EDT...
  MARLBORO AROUND 300 PM EDT...
  MORGANVILLE AROUND 305 PM EDT...
  HOLMDEL AND MATAWAN AROUND 310 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 4025 7398 4015 7448 4031 7458 4048 7427
      4044 7420 4046 7418 4045 7415 4046 7412
      4044 7409 4044 7407 4031 7396
TIME...MOT...LOC 1822Z 245DEG 14KT 4027 7443

$$

HEAVENER

2 follow-up statements

823 
WWUS51 KPHI 091844
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
244 PM EDT TUE AUG 9 2011

NJC021-091854-
/O.CAN.KPHI.SV.W.0237.000000T0000Z-110809T1915Z/
MERCER NJ-
244 PM EDT TUE AUG 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MERCER COUNTY 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.

LAT...LON 4035 7399 4027 7436 4039 7443 4048 7427
      4044 7420 4046 7418 4045 7415 4046 7412
      4044 7409 4044 7407
TIME...MOT...LOC 1844Z 245DEG 14KT 4031 7433

$$

NJC023-025-091915-
/O.CON.KPHI.SV.W.0237.000000T0000Z-110809T1915Z/
MIDDLESEX NJ-MONMOUTH NJ-
244 PM EDT TUE AUG 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTHEASTERN MONMOUTH AND EAST CENTRAL MIDDLESEX COUNTIES...

AT 242 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR YORKETOWN...OR 13
MILES SOUTHEAST OF NEW BRUNSWICK...MOVING NORTHEAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROBERTSVILLE AND OLD BRIDGE BY 255 PM EDT...
  MARLBORO BY 300 PM EDT...
  MORGANVILLE AND 8 MILES SOUTHEAST OF MADISON PARK BY 305 PM EDT...
  MATAWAN BY 310 PM EDT...
  HOLMDEL...LINCROFT...STRATHMORE AND MIDDLETOWN BY 315 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WINDS UP TO 60 MPH WERE REPORTED IN NORTHEAST MILLSTONE TOWNSHIP 
WITH THIS STORM. THIS IS A DANGEROUS STORM...SEEK SAFE SHELTER AND 
STAY AWAY FROM WINDOWS!

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.

&&

LAT...LON 4035 7399 4027 7436 4039 7443 4048 7427
      4044 7420 4046 7418 4045 7415 4046 7412
      4044 7409 4044 7407
TIME...MOT...LOC 1844Z 245DEG 14KT 4031 7433

$$

HEAVENER

678 
WWUS51 KPHI 091905
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
305 PM EDT TUE AUG 9 2011

NJC023-025-091915-
/O.CON.KPHI.SV.W.0237.000000T0000Z-110809T1915Z/
MIDDLESEX NJ-MONMOUTH NJ-
305 PM EDT TUE AUG 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR NORTH CENTRAL MONMOUTH AND EAST CENTRAL MIDDLESEX COUNTIES...

AT 259 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED
NEAR MORGANVILLE...OR 13 MILES SOUTH OF PERTH AMBOY...MOVING
NORTHEAST AT 15 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  MATAWAN BY 310 PM EDT...
  STRATHMORE...MIDDLETOWN...KEYPORT AND 6 MILES SOUTH OF CLIFFWOOD
  BEACH BY 315 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4038 7403 4033 7427 4042 7437 4048 7427
      4044 7420 4046 7418 4045 7415 4046 7412
      4044 7409 4044 7407
TIME...MOT...LOC 1903Z 245DEG 14KT 4034 7424

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 12:18 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester	57 min
Aug 9, 12:32 PM EDT	Tornado Warning	PHI	Gloucester	28 min
Aug 9, 1:02 PM EDT	Special Weather Statement	PHI	Camden, Gloucester, Salem	58 min
Aug 9, 1:08 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Camden, Cumberland, Gloucester, Salem	67 min
Aug 9, 1:17 PM EDT	Special Weather Statement	PHI	Burlington, Camden, Gloucester	58 min
Aug 9, 2:16 PM EDT	Special Weather Statement	PHI	Atlantic	59 min
Aug 9, 2:22 PM EDT	Areal Flood Advisory	PHI	Camden, Cumberland, Gloucester, Salem	3 hr
Aug 9, 2:53 PM EDT	Areal Flood Advisory	PHI	Middlesex, Morris, Somerset	3 hr
Aug 9, 3:27 PM EDT	Special Weather Statement	PHI	Atlantic	63 min
Aug 9, 4:13 PM EDT	Special Marine Warning	PHI		92 min
Aug 9, 5:48 PM EDT	Special Weather Statement	PHI	Gloucester	87 min
Aug 9, 6:54 PM EDT	Special Weather Statement	PHI	Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem	81 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2011 Every severe thunderstorm warning in 2011

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.