Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 129, NWS Philadelphia/Mount Holly

July 6, 20204 counties in New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 6, 2020, 4:45 PM EDT for 4 counties in New Jersey. It was in force for 60 min. 3 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
Jul 6, 2020, 4:45 PM EDT (20:45 UTC)
Expired
Jul 6, 2020, 5:45 PM EDT
In force
60 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 77 km from the middle of the area, began a volume at 20:48 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 6, 5:03 PM EDTMARINE TSTM WIND 462 Ne Strathmere, NJWEATHERFLOW SITE XOCS.
Jul 6, 5:10 PM EDTHAIL 0.5Cedarville, NJTIME ESTIMATED FROM RADAR.
Jul 6, 5:13 PM EDTHAIL 0.25Newport, 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 6, 1:38 PM EDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.8 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-pSkew-T log-p diagram, Wallops Is Stn, VA at 12:00Z on 2020-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1228 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, Wallops Is Stn, VA at 12:00Z on 2020-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939Sfc1 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
1228 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1186 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

406 
WUUS51 KPHI 062045
SVRPHI
NJC001-009-011-033-062145-
/O.NEW.KPHI.SV.W.0129.200706T2045Z-200706T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
445 PM EDT Mon Jul 6 2020

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Southern Atlantic County in southern New Jersey...
  Cumberland County in southern New Jersey...
  Southeastern Salem County in southern New Jersey...
  Cape May County in southern New Jersey...

* Until 545 PM EDT.

* At 444 PM EDT, severe thunderstorms were located along a line
  extending from near Surf City to Atlantic City to near Marmora to
  near Bricksboro to Shiloh, moving south at 35 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...
  Vineland, Atlantic City, Millville, Bridgeton, Ocean City, Cape
  May, Cumberland, Pleasantville, Somers Point, Ventnor City,
  Brigantine, Northfield, Absecon, Margate City, North Wildwood,
  Laurel Lake, Wildwood Crest, Woodbine, Sea Isle City and Estell
  Manor.

This includes the following highways...
 Garden State Parkway between mile markers 0 and 36.
 Atlantic City Expressway between mile markers 0 and 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

In addition to large hail and damaging winds, frequent cloud to
ground lightning is occurring with these storms. Move indoors
immediately. Remember, if you can hear thunder, you are close enough
to be struck by lightning.

&&

LAT...LON 3926 7449 3905 7469 3889 7482 3893 7500
      3915 7495 3919 7532 3954 7538 3938 7469
      3942 7445 3953 7436 3943 7428
TIME...MOT...LOC 2044Z 351DEG 30KT 3961 7421 3936 7445 3926 7469 3931
7493 3946 7532

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

Gorse
1 follow-up statement
246 
WWUS51 KPHI 062122
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
522 PM EDT Mon Jul 6 2020

NJC033-062131-
/O.CAN.KPHI.SV.W.0129.000000T0000Z-200706T2145Z/
Salem NJ-
522 PM EDT Mon Jul 6 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SALEM COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
southern New Jersey.

LAT...LON 3926 7449 3905 7469 3889 7482 3893 7500
      3915 7495 3919 7532 3942 7529 3944 7503
      3938 7469 3942 7445 3953 7436 3943 7428
TIME...MOT...LOC 2121Z 351DEG 30KT 3932 7415 3906 7439 3896 7463 3902
7487 3917 7526

$$

NJC001-009-011-062145-
/O.CON.KPHI.SV.W.0129.000000T0000Z-200706T2145Z/
Atlantic NJ-Cumberland NJ-Cape May NJ-
522 PM EDT Mon Jul 6 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHERN ATLANTIC...CUMBERLAND AND CAPE MAY COUNTIES...

At 521 PM EDT, severe thunderstorms were located along a line
extending from 13 miles southeast of Brigantine to 17 miles southeast
of Strathmere to 9 miles southeast of Stone Harbor to Rio Grande to 6
miles southwest of Fortesque, moving south at 35 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...
Vineland, Atlantic City, Millville, Bridgeton, Ocean City, Cape May,
Cumberland, Pleasantville, Somers Point, Ventnor City, Brigantine,
Northfield, Absecon, Margate City, North Wildwood, Laurel Lake,
Wildwood Crest, Woodbine, Sea Isle City and Estell Manor.

This includes the following highways...
 Garden State Parkway between mile markers 0 and 36.
 Atlantic City Expressway between mile markers 0 and 6.

LAT...LON 3926 7449 3905 7469 3889 7482 3893 7500
      3915 7495 3919 7532 3942 7529 3944 7503
      3938 7469 3942 7445 3953 7436 3943 7428
TIME...MOT...LOC 2121Z 351DEG 30KT 3932 7415 3906 7439 3896 7463 3902
7487 3917 7526

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

BAH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 3:16 AM EDTHeat AdvisoryPHIBurlington, Camden, Gloucester, Mercer12 hr
Jul 6, 12:45 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden60 min
Jul 6, 12:52 PM EDTFlash Flood WatchPHIBurlington, Camden, Gloucester, Mercer, Salem8 hr
Jul 6, 12:57 PM EDTAreal Flood AdvisoryPHIBurlington, Camden2 hr
Jul 6, 1:08 PM EDTFlash Flood WarningPHIBurlington, Camden4 hr
Jul 6, 1:15 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Monmouth60 min
Jul 6, 1:43 PM EDTSevere Thunderstorm WarningPHIBurlington, Camden62 min
Jul 6, 1:52 PM EDTSpecial Weather StatementPHIOcean23 min
Jul 6, 2:00 PM EDTSevere Thunderstorm WarningPHIBurlington, Mercer, Middlesex, Monmouth, Ocean75 min
Jul 6, 2:02 PM EDTAreal Flood AdvisoryPHIBurlington, Camden, Mercer, Middlesex, Monmouth, Ocean118 min
Jul 6, 2:39 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Camden, Gloucester, Ocean66 min
Jul 6, 2:41 PM EDTSevere Thunderstorm WarningPHIHunterdon, Mercer49 min
Jul 6, 2:46 PM EDTSpecial Marine WarningPHI89 min
Jul 6, 2:48 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Gloucester, Ocean4 hr
Jul 6, 2:51 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Monmouth39 min
Jul 6, 2:57 PM EDTFlash Flood Warning EmergencyCatastrophic damage threatPHIBurlington, Camden, Gloucester4 hr
Jul 6, 3:00 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren45 min
Jul 6, 3:14 PM EDTSevere Thunderstorm WarningPHIMonmouth, Ocean46 min
Jul 6, 3:18 PM EDTSevere Thunderstorm WarningPHIMiddlesex, Somerset42 min
Jul 6, 3:34 PM EDTAreal Flood AdvisoryPHIMiddlesex, Monmouth, Somerset116 min
Jul 6, 3:36 PM EDTSevere Thunderstorm WarningPHIAtlantic, Burlington, Ocean54 min
Jul 6, 3:36 PM EDTSevere Thunderstorm WarningPHIHunterdon, Morris, Somerset39 min
Jul 6, 3:38 PM EDTSevere Thunderstorm WarningPHIHunterdon, Warren52 min
Jul 6, 3:44 PM EDTSpecial Marine WarningPHI61 min
Jul 6, 3:44 PM EDTSpecial Marine WarningPHI61 min
Jul 6, 3:47 PM EDTFlash Flood WarningPHIMiddlesex, Morris, Somerset4 hr
Jul 6, 3:47 PM EDTSevere Thunderstorm WarningPHIAtlantic, Camden, Cumberland, Gloucester, Salem58 min
Jul 6, 4:41 PM EDTSpecial Marine WarningPHI64 min
Jul 6, 4:45 PM EDTSpecial Marine WarningPHI41 min
Jul 6, 4:58 PM EDTSpecial Marine WarningPHI62 min
Jul 6, 5:24 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more4 hr
Jul 6, 5:39 PM EDTSpecial Marine WarningPHI66 min
Jul 6, 5:43 PM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland47 min
Jul 6, 5:57 PM EDTSpecial Marine WarningPHI63 min
Jul 6, 6:00 PM EDTSevere Thunderstorm WarningPHISalem60 min
Jul 6, 6:43 PM EDTSpecial Marine WarningPHI44 min
Jul 6, 6:56 PM EDTSpecial Marine WarningPHI47 min
Jul 6, 7:18 PM EDTSevere Thunderstorm WarningPHISussex, Warren36 min
Jul 6, 7:55 PM EDTSpecial Weather StatementPHISussex50 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020Every severe thunderstorm warning in 2020

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.