Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 40, NWS New York, NY

July 6, 2021Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 6, 2021, 6:58 PM EDT for Suffolk County, New York. It was in force for 47 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 6, 2021, 6:58 PM EDT (22:58 UTC)
Expired: Jul 6, 2021, 7:45 PM EDT
In force: 47 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 47 km from the middle of the area, began a volume at 22:59 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 6, 7:20 PM EDT	TSTM WND DMG	1 Ene Patchogue, NY	SUFFOLK COUNTY PD REPORT FALLEN TREE.

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.

Issued	Product	Office	Lasted
Jul 6, 1:32 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.0 hours before the alert went out and 47 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: 230 J/kg
Mixed-layer CIN: -195 J/kg
Mixed-layer LCL: 1202 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

411 
WUUS51 KOKX 062258
SVROKX
NYC103-062345-
/O.NEW.KOKX.SV.W.0040.210706T2258Z-210706T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
658 PM EDT Tue Jul 6 2021

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Suffolk County in southeastern New York...

* Until 745 PM EDT.

* At 658 PM EDT, severe thunderstorms were located along a line
  extending from near Gardiners Island to Ronkonkoma, moving east at
  45 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Severe thunderstorms will be near...
  Shirley and Mastic around 715 PM EDT.
  Center Moriches and Mastic Beach around 720 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4083 7246 4065 7306 4073 7295 4071 7307
      4097 7309 4100 7264 4125 7206 4125 7205
      4124 7202 4119 7215 4110 7229 4104 7212
      4114 7213 4114 7212 4110 7206 4101 7209
      4109 7194 4108 7186
TIME...MOT...LOC 2258Z 287DEG 41KT 4114 7202 4081 7313 

HAIL...0.75IN
WIND...60MPH
 
$$

NV

1 follow-up statement

114 
WWUS51 KOKX 062337
SVSOKX

Severe Weather Statement
National Weather Service New York NY
737 PM EDT Tue Jul 6 2021

NYC103-062347-
/O.EXP.KOKX.SV.W.0040.000000T0000Z-210706T2345Z/
Suffolk NY-
737 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SUFFOLK COUNTY WILL EXPIRE AT
745 PM EDT...
    
The storms which prompted the warning will move out of the area 
shortly. Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southeastern New York.

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

LAT...LON 4083 7246 4065 7306 4073 7295 4071 7307
      4097 7309 4100 7264 4125 7206 4125 7205
      4124 7202 4119 7215 4110 7229 4104 7212
      4114 7213 4114 7212 4110 7206 4101 7209
      4109 7194 4108 7186
TIME...MOT...LOC 2337Z 287DEG 41KT 4101 7148 4068 7259 

$$

NV

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 4:10 PM EDT	Special Weather Statement	OKX	Dutchess	50 min
Jul 6, 4:43 PM EDT	Special Weather Statement	OKX	Orange	47 min
Jul 6, 5:08 PM EDT	Severe Thunderstorm Warning	OKX	Putnam	32 min
Jul 6, 5:15 PM EDT	Special Weather Statement	OKX	Orange	45 min
Jul 6, 5:49 PM EDT	Severe Thunderstorm Warning	OKX	Westchester	56 min
Jul 6, 5:53 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Kings, New York, Orange, Queens, Richmond and 2 more	37 min
Jul 6, 5:56 PM EDT	Special Marine Warning	OKX		94 min
Jul 6, 5:58 PM EDT	Special Marine Warning	OKX		92 min
Jul 6, 6:24 PM EDT	Special Marine Warning	OKX		2 hr
Jul 6, 6:28 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond and 2 more	47 min
Jul 6, 6:37 PM EDT	Special Weather Statement	OKX	Suffolk	38 min
Jul 6, 7:07 PM EDT	Special Marine Warning	OKX		98 min
Jul 6, 7:36 PM EDT	Areal Flood Advisory	OKX	Suffolk	114 min

Nearby

Severe Thunderstorm Warnings in New York, 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.