Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 212, NWS Philadelphia/Mount Holly

July 21, 2021Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 21, 2021, 2:52 PM EDT for Ocean County, New Jersey. It was in force for 26 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 21, 2021, 2:52 PM EDT (18:52 UTC)
Expired
Jul 21, 2021, 3:18 PM EDT
In force
26 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 15 km from the middle of the area, began a volume at 18:54 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
Jul 21, 3:20 PM EDTHAIL 1Lakehurst, NJ

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.

IssuedProductOfficeLasted
Jul 21, 11:56 AM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.9 hours before the alert went out and 164 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 2021-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 130 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 2021-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 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
130 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1495 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
48 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

418 
WUUS51 KPHI 211852 RRA
SVRPHI
NJC029-211945-
/O.NEW.KPHI.SV.W.0212.210721T1852Z-210721T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
252 PM EDT Wed Jul 21 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Central Ocean County in southern New Jersey...

* Until 345 PM EDT.

* At 251 PM EDT, a severe thunderstorm was located near Bamber Lake,
  or 12 miles southwest of Toms River, moving east at 45 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Wind damage to 
           roofs, siding, trees, and power lines is possible.

* Locations impacted include...
  Toms River, Barnegat, Beachwood, Seaside Heights, Lakehurst,
  Mantoloking, Leisure Village, Dover Beaches North, Holiday City
  South, Pleasant Plains, Warren Grove, Cedar Glen West, Leisure
  Village East, Dover Beaches South, Holiday City-Berkeley, Bamber
  Lake, Cedar Glen Lakes, Whiting, Brookville and Pine Ridge At
  Crestwood.

This includes Garden State Parkway between mile markers 66 and 89.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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.

&&

LAT...LON 3973 7408 3973 7439 3977 7439 3994 7448
      4003 7451 4006 7402
TIME...MOT...LOC 1851Z 267DEG 39KT 3985 7431 

HAIL...1.00IN
WIND...60MPH
 
$$

Gorse
2 follow-up statements
412 
WWUS51 KPHI 211906
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
306 PM EDT Wed Jul 21 2021

NJC029-211945-
/O.CON.KPHI.SV.W.0212.000000T0000Z-210721T1945Z/
Ocean NJ-
306 PM EDT Wed Jul 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR CENTRAL OCEAN COUNTY...

At 306 PM EDT, a severe thunderstorm was located near Seaside
Heights, or 10 miles southeast of Toms River, moving east at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Wind damage to roofs, 
         siding, trees, and power lines is possible.

Locations impacted include...
Barnegat, Beachwood, Brookville, Warren Grove, Bamber Lake, Old
Halfway, Ocean Acres, Waretown and Holiday Heights.

This includes Garden State Parkway between mile markers 66 and 79.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Frequent cloud to ground lightning is occurring with this storm. Move
indoors immediately. Lightning is one of nature's leading killers.
Remember, if you can hear thunder, you are close enough to be struck
by lightning.

&&

LAT...LON 3973 7408 3973 7439 3977 7439 3992 7447
      3993 7405
TIME...MOT...LOC 1906Z 267DEG 39KT 3986 7410 

HAIL...1.00IN
WIND...60MPH
 
$$

Gorse
001 
WWUS51 KPHI 211918
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
318 PM EDT Wed Jul 21 2021

NJC029-211927-
/O.CAN.KPHI.SV.W.0212.000000T0000Z-210721T1945Z/
Ocean NJ-
318 PM EDT Wed Jul 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL OCEAN COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern New Jersey.

LAT...LON 3973 7408 3973 7439 3977 7439 3992 7447
      3993 7405
TIME...MOT...LOC 1915Z 267DEG 39KT 3987 7393 

$$

Gorse

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 11:09 AM EDTSpecial Weather StatementPHIMorris36 min
Jul 21, 12:41 PM EDTSpecial Weather StatementPHIOcean34 min
Jul 21, 12:46 PM EDTSpecial Marine WarningPHI89 min
Jul 21, 12:51 PM EDTSevere Thunderstorm WarningPHIAtlantic, Ocean39 min
Jul 21, 12:53 PM EDTSevere Thunderstorm WarningPHIOcean67 min
Jul 21, 1:28 PM EDTSevere Thunderstorm WarningPHIAtlantic47 min
Jul 21, 1:43 PM EDTSevere Thunderstorm WarningPHIOcean49 min
Jul 21, 2:10 PM EDTSpecial Marine WarningPHI95 min
Jul 21, 2:13 PM EDTSevere Thunderstorm WarningPHIBurlington47 min
Jul 21, 2:35 PM EDTSpecial Marine WarningPHI55 min
Jul 21, 3:04 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester56 min
Jul 21, 3:16 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden44 min
Jul 21, 3:27 PM EDTSevere Thunderstorm WarningPHICamden, Gloucester33 min
Jul 21, 3:43 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean47 min
Jul 21, 3:48 PM EDTSpecial Marine WarningPHI57 min
Jul 21, 3:48 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden42 min
Jul 21, 3:57 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Salem33 min
Jul 21, 4:04 PM EDTSpecial Marine WarningPHI56 min
Jul 21, 4:17 PM EDTSpecial Marine WarningPHI58 min
Jul 21, 4:50 PM EDTSpecial Marine WarningPHI55 min
Jul 21, 5:07 PM EDTSpecial Marine WarningPHI23 min
Jul 21, 5:09 PM EDTSpecial Marine WarningPHI66 min
Jul 21, 5:24 PM EDTSpecial Marine WarningPHI46 min
Jul 21, 5:31 PM EDTSevere Thunderstorm WarningPHICape May29 min
Jul 21, 5:52 PM EDTSpecial Marine WarningPHI53 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2021Every severe thunderstorm warning in 2021

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.