Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 288, NWS Philadelphia/Mount Holly

August 21, 2011Monmouth County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 21, 2011, 3:21 PM EDT for Monmouth County, Ocean County, New Jersey. It was in force for 54 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: Aug 21, 2011, 3:21 PM EDT (19:21 UTC)
Expired: Aug 21, 2011, 4:15 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 52 km from the middle of the area, began a volume at 19:22 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
Aug 21, 12:52 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.4 hours before the alert went out and 118 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: 874 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 857 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 116 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.

531 
WUUS51 KPHI 211921
SVRPHI
NJC025-029-212015-
/O.NEW.KPHI.SV.W.0288.110821T1921Z-110821T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
321 PM EDT SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF SANDY HOOK...
  NORTHEASTERN OCEAN COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 415 PM EDT

* AT 318 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
  HOWELL...AND MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  COLLINGWOOD PARK AROUND 325 PM EDT...
  TINTON FALLS AND LINCROFT AROUND 335 PM EDT...
  ASBURY PARK AND RED BANK AROUND 340 PM EDT...
  LONG BRANCH AND ELBERON AROUND 345 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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT SUNDAY
EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND
EASTERN PENNSYLVANIA.

&&

LAT...LON 4014 7402 4007 7402 4006 7432 4033 7431
      4045 7417 4046 7412 4041 7400 4042 7399
      4044 7402 4047 7402 4047 7399 4041 7396
      4032 7396
TIME...MOT...LOC 1920Z 241DEG 25KT 4021 7420

$$

IOVINO

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 3:24 AM EDT	Small Craft Advisory	PHI		30 hr
Aug 21, 3:28 AM EDT	Flash Flood Watch	PHI	Burlington, Camden, Cumberland, Gloucester, Hunterdon, Mercer and 6 more	17 hr
Aug 21, 8:41 AM EDT	Special Weather Statement	PHI	Salem	64 min
Aug 21, 10:33 AM EDT	Special Marine Warning	PHI		57 min
Aug 21, 11:07 AM EDT	Special Marine Warning	PHI		83 min
Aug 21, 12:20 PM EDT	Special Weather Statement	PHI	Morris	55 min
Aug 21, 12:33 PM EDT	Severe Thunderstorm Warning	PHI	Morris	33 min
Aug 21, 12:39 PM EDT	Special Weather Statement	PHI	Burlington, Camden	66 min
Aug 21, 1:47 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Mercer	58 min
Aug 21, 2:33 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Mercer	117 min
Aug 21, 2:43 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester, Mercer	62 min
Aug 21, 3:08 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	67 min
Aug 21, 3:22 PM EDT	Special Marine Warning	PHI		83 min
Aug 21, 3:46 PM EDT	Flash Flood Warning	PHI	Burlington	2 hr
Aug 21, 4:14 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	46 min
Aug 21, 4:26 PM EDT	Special Marine Warning	PHI		57 min
Aug 21, 4:35 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Mercer, Middlesex, Monmouth, Ocean	3 hr
Aug 21, 5:44 PM EDT	Special Weather Statement	PHI	Mercer	61 min
Aug 21, 6:05 PM EDT	Flash Flood Warning	PHI	Burlington	6 hr
Aug 21, 6:12 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	63 min
Aug 21, 6:20 PM EDT	Special Weather Statement	PHI	Hunterdon	55 min
Aug 21, 6:54 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Middlesex, Morris, Somerset, Sussex, Warren	111 min
Aug 21, 7:08 PM EDT	Special Weather Statement	PHI	Hunterdon, Middlesex, Somerset	52 min
Aug 21, 7:18 PM EDT	Severe Thunderstorm Warning	PHI	Monmouth, Ocean	42 min
Aug 21, 7:21 PM EDT	Special Marine Warning	PHI		84 min
Aug 21, 7:24 PM EDT	Flash Flood Warning	PHI	Mercer, Monmouth, Ocean	5 hr
Aug 21, 7:35 PM EDT	Areal Flood Advisory	PHI	Burlington, Mercer, Middlesex, Monmouth, Ocean	115 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.