Alert archive / New Jersey / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 244, NWS Philadelphia/Mount Holly

August 19, 2020Monmouth County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 19, 2020, 10:01 AM EDT for Monmouth County, New Jersey. It was in force for 29 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 19, 2020, 10:01 AM EDT (14:01 UTC)
Expired: Aug 19, 2020, 10:30 AM EDT
In force: 29 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Monmouth County, NJ

The radar

The Philadelphia radar (KDIX), 56 km from the middle of the area, began a volume at 14:00 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 19, 10:07 AM EDT	TSTM WND DMG	1 Nw Eatontown, NJ	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 NW EATONTOWN. BRANCHES DOWNED AND TRASH/RECYCLING BINS SCATTERED. TIME ESTIMATED FROM RADAR.
Aug 19, 10:16 AM EDT	TSTM WND DMG	1 Wsw Port-Au-Peck, NJ	LARGE TREE LIMBS BLOWN DOWN. PEA SIZED HAIL OCCURRING TOO.

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, 2.0 hours before the alert went out and 115 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: 30 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1488 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 119 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

667 
WUUS51 KPHI 191401
SVRPHI
NJC025-191430-
/O.NEW.KPHI.SV.W.0244.200819T1401Z-200819T1430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Mount Holly NJ
1001 AM EDT Wed Aug 19 2020

The National Weather Service in Mount Holly NJ has issued a

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

* Until 1030 AM EDT.

* At 1001 AM EDT, a severe thunderstorm was located over Lincroft, or
  7 miles northwest of Long Branch, moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damage to roofs, siding, trees, and power lines is 
           possible.

* Locations impacted include...
  Long Branch, Asbury Park, Middletown, Marlboro, Tinton Falls,
  Holmdel, Red Bank, Keansburg, Highlands, East Freehold, Elberon,
  Navesink, Lincroft, Eatontown, Freehold, West Long Branch, Keyport,
  Rumson, Little Silver and Oceanport.

This includes Garden State Parkway between mile markers 102 and 118.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

&&

LAT...LON 4030 7397 4019 7399 4026 7427 4044 7421
      4046 7418 4045 7416 4045 7413 4041 7399
      4041 7398 4044 7399 4044 7397
TIME...MOT...LOC 1401Z 265DEG 16KT 4034 7412 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

NC

2 follow-up statements

850 
WWUS51 KPHI 191416
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1016 AM EDT Wed Aug 19 2020

NJC025-191430-
/O.CON.KPHI.SV.W.0244.000000T0000Z-200819T1430Z/
Monmouth NJ-
1016 AM EDT Wed Aug 19 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT
FOR NORTHEASTERN MONMOUTH COUNTY...

At 1016 AM EDT, a severe thunderstorm was located over Red Bank, or
near Long Branch, moving east at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damage to roofs, siding, trees, and power lines is 
         possible.

Locations impacted include...
Long Branch, Asbury Park, Middletown, Tinton Falls, Red Bank,
Keansburg, Highlands, Elberon, Navesink, Lincroft, Eatontown, West
Long Branch, Rumson, Little Silver, Oceanport, Neptune City, Bradley
Beach, Shrewsbury, Interlaken and Deal.

This includes Garden State Parkway between mile markers 103 and 112.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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 4019 7399 4024 7414 4045 7413 4043 7407
      4042 7405 4041 7398 4044 7399 4044 7398
      4043 7397 4030 7397
TIME...MOT...LOC 1416Z 265DEG 16KT 4035 7403 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

NC

319 
WWUS51 KPHI 191426
SVSPHI

Severe Weather Statement
National Weather Service Mount Holly NJ
1026 AM EDT Wed Aug 19 2020

NJC025-191436-
/O.EXP.KPHI.SV.W.0244.000000T0000Z-200819T1430Z/
Monmouth NJ-
1026 AM EDT Wed Aug 19 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONMOUTH COUNTY
WILL EXPIRE AT 1030 AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However heavy rain
is still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Mount Holly NJ.

LAT...LON 4019 7399 4024 7414 4045 7413 4043 7407
      4042 7405 4041 7398 4044 7399 4044 7398
      4043 7397 4030 7397
TIME...MOT...LOC 1426Z 265DEG 16KT 4035 7404 

$$

NC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 8:43 AM EDT	Special Marine Warning	PHI		33 min
Aug 19, 9:55 AM EDT	Special Weather Statement	PHI	Monmouth	35 min
Aug 19, 10:03 AM EDT	Tornado Warning	PHI	Monmouth	27 min
Aug 19, 10:06 AM EDT	Special Marine Warning	PHI		54 min
Aug 19, 11:03 AM EDT	Special Marine Warning	PHI		57 min
Aug 19, 11:06 AM EDT	Special Marine Warning	PHI		54 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 2020 Every 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.