Alert archive / New Jersey / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 174, NWS Philadelphia/Mount Holly

July 14, 2021Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 14, 2021, 7:03 PM EDT for Monmouth County, New Jersey. It was in force for 42 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 14, 2021, 7:03 PM EDT (23:03 UTC)
Expired: Jul 14, 2021, 7:45 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 57 km from the middle of the area, began a volume at 23:03 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 14, 7:04 PM EDT	TSTM WND DMG	1 Wnw Middletown Twp, NJ	WIRES DOWN NEAR ROUTE 35. POWER OUTAGES IN THE AREA. TIME ESTIMATED FROM RADAR.
Jul 14, 7:24 PM EDT	TSTM WND DMG	Hazlet, NJ	DOWNED WIRES NEAR HAZLET AVENUE AND ROUTE 35. TIME ESTIMATED FROM RADAR.
Jul 14, 7:26 PM EDT	TSTM WND DMG	Union Beach, NJ	DOWNED POWER LINES NEAR A RESIDENCE ON PARK AVENUE. TIME ESTIMATED FROM RADAR.

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, 11.1 hours before the alert went out and 116 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: 1588 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

610 
WUUS51 KPHI 142303
SVRPHI
NJC025-142345-
/O.NEW.KPHI.SV.W.0174.210714T2303Z-210714T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
703 PM EDT Wed Jul 14 2021

The National Weather Service in Mount Holly NJ has issued a

* Severe Thunderstorm Warning for...
  Northeastern Monmouth County in central New Jersey...

* Until 745 PM EDT.

* At 702 PM EDT, a severe thunderstorm was located over Middletown,
  or 7 miles southwest of Sandy Hook, moving east at 15 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...
  Long Branch, Sandy Hook, Middletown, Tinton Falls, Holmdel, Red
  Bank, Keansburg, Matawan, Highlands, Elberon, Navesink, Collingwood
  Park, Lincroft, Eatontown, West Long Branch, Keyport, Rumson,
  Little Silver, Oceanport and Shrewsbury.

This includes Garden State Parkway between mile markers 102 and 120.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4024 7397 4021 7421 4042 7425 4044 7424
      4045 7422 4044 7420 4046 7418 4045 7413
      4041 7399 4044 7399 4048 7402 4047 7400
      4043 7397
TIME...MOT...LOC 2302Z 256DEG 13KT 4037 7409 

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

Fitzsimmons

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 3:42 PM EDT	Special Weather Statement	PHI	Morris	18 min
Jul 14, 5:47 PM EDT	Special Marine Warning	PHI		43 min
Jul 14, 5:54 PM EDT	Special Weather Statement	PHI	Ocean	51 min
Jul 14, 6:41 PM EDT	Special Weather Statement	PHI	Monmouth	34 min
Jul 14, 7:03 PM EDT	Special Marine Warning	PHI		61 min
Jul 14, 7:24 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth	36 min
Jul 14, 7:26 PM EDT	Areal Flood Advisory	PHI	Middlesex, Monmouth	2 hr
Jul 14, 7:37 PM EDT	Flash Flood Warning	PHI	Monmouth	3 hr

Nearby

Severe Thunderstorm Warnings in New Jersey, 2021 Every 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.