Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 21, NWS New York, NY

June 8, 2021Bergen County, New Jersey; Bronx County, Rockland County, Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Jun 8, 2021, 3:10 PM EDT for Bergen County, New Jersey; Bronx County, Rockland County, Westchester County, New York. It was in force for 50 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: Jun 8, 2021, 3:10 PM EDT (19:10 UTC)
Expired: Jun 8, 2021, 4:00 PM EDT
In force: 50 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Bergen County, NJ, Bronx County, NY, Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 79 km from the middle of the area, began a volume at 19:12 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
Jun 8, 3:26 PM EDT	TSTM WND DMG	1 Ene Tappan, NY	TREE REPORTED DOWN ON NY 303 NORTHBOUND BETWEEN CAMPBELL AVENUE AND OAK TREE ROAD IN ORANGETOWN WITH PARTIAL BLOCKAGE OF ONE LANE.

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, 7.2 hours before the alert went out and 79 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: 740 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

214 
WUUS51 KOKX 081910
SVROKX
NJC003-NYC005-087-119-082000-
/O.NEW.KOKX.SV.W.0021.210608T1910Z-210608T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
310 PM EDT Tue Jun 8 2021

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Northeastern Bergen County in northeastern New Jersey...
  Southern Westchester County in southeastern New York...
  Bronx County in southeastern New York...
  Rockland County in southeastern New York...

* Until 400 PM EDT.

* At 310 PM EDT, severe thunderstorms were located along a line
  extending from Pearl River to Bergenfield, moving east at 15 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and power lines.

* Severe thunderstorms will be near...
  Tappan and Orangeburg around 315 PM EDT.
  Norwood around 320 PM EDT.
  Nyack and Riverdale around 325 PM EDT.
  Dobbs Ferry around 330 PM EDT.
  Yonkers and Tarrytown around 335 PM EDT.
  Bronxville around 340 PM EDT.
  Hawthorne around 345 PM EDT.
  New Rochelle and White Plains around 350 PM EDT.
  Harrison around 355 PM EDT.
  Port Chester and Rye around 400 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4088 7404 4111 7406 4117 7365 4114 7365
      4110 7373 4101 7365 4098 7365 4094 7367
      4090 7374
TIME...MOT...LOC 1910Z 264DEG 15KT 4105 7398 4093 7400 

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

NV

1 follow-up statement

702 
WWUS51 KOKX 081958
SVSOKX

Severe Weather Statement
National Weather Service New York NY
358 PM EDT Tue Jun 8 2021

NJC003-NYC005-087-119-082007-
/O.EXP.KOKX.SV.W.0021.000000T0000Z-210608T2000Z/
Bergen NJ-Westchester NY-Bronx NY-Rockland NY-
358 PM EDT Tue Jun 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BERGEN...SOUTHERN
WESTCHESTER...BRONX AND ROCKLAND COUNTIES WILL EXPIRE AT 400 PM
EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 4088 7404 4111 7406 4117 7365 4114 7365
      4110 7373 4101 7365 4098 7365 4094 7367
      4090 7374
TIME...MOT...LOC 1957Z 264DEG 15KT 4107 7373 4095 7375 

$$

JM

The office that day

Everything else NWS New York, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 2:02 PM EDT	Areal Flood Advisory	OKX	Passaic	118 min
Jun 8, 2:26 PM EDT	Special Weather Statement	OKX	Bergen, Passaic	49 min
Jun 8, 2:40 PM EDT	Severe Thunderstorm Warning	OKX	Bergen	35 min
Jun 8, 2:58 PM EDT	Severe Thunderstorm Warning	OKX	Bergen	47 min
Jun 8, 3:06 PM EDT	Areal Flood Advisory	OKX	Bergen	114 min
Jun 8, 3:14 PM EDT	Special Weather Statement	OKX	Essex, Union	46 min
Jun 8, 3:15 PM EDT	Flash Flood Warning	OKX	Bergen, Essex, Hudson, Passaic, Union	3 hr
Jun 8, 3:29 PM EDT	Severe Thunderstorm Warning	OKX	Bergen, Essex, Hudson, Union	46 min
Jun 8, 3:30 PM EDT	Flash Flood Warning	OKX	Bergen	3 hr
Jun 8, 3:49 PM EDT	Flash Flood Warning	OKX	Hudson	2 hr
Jun 8, 4:15 PM EDT	Severe Thunderstorm Warning	OKX	Hudson	43 min
Jun 8, 12:04 AM EDT	Marine Dense Fog Advisory	OKX		9 hr
Jun 8, 12:24 PM EDT	Areal Flood Advisory	OKX	Orange	3 hr
Jun 8, 12:49 PM EDT	Special Weather Statement	OKX	Orange	41 min
Jun 8, 1:07 PM EDT	Flash Flood Warning	OKX	Orange	3 hr
Jun 8, 1:28 PM EDT	Severe Thunderstorm Warning	OKX	Orange	62 min
Jun 8, 2:07 PM EDT	Severe Thunderstorm Warning	OKX	Putnam, Westchester	38 min
Jun 8, 3:28 PM EDT	Special Marine Warning	OKX		62 min
Jun 8, 4:10 PM EDT	Special Marine Warning	OKX		43 min
Jun 8, 4:30 PM EDT	Special Marine Warning	OKX		45 min
Jun 8, 4:31 PM EDT	Flash Flood Warning	OKX	Nassau, Queens	56 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 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.