Alert archive / New York / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 21, NWS New York, NY

July 3, 2023Westchester County, New York; Greater Bridgeport Planning Region, Connecticut

NWS New York, NY issued this severe thunderstorm warning at Jul 3, 2023, 5:39 PM EDT for Westchester County, New York; Greater Bridgeport Planning Region, Connecticut. It was in force for 51 min. 4 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 3, 2023, 5:39 PM EDT (21:39 UTC)
Expired: Jul 3, 2023, 6:30 PM EDT
In force: 51 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Tornado: Possible
Damage threat: Considerable
Hail: 1.75 in
Wind: 60.0 mph

Counties Greater Bridgeport Planning Region, CT, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 56 km from the middle of the area, began a volume at 21:43 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 3, 5:48 PM EDT	TSTM WND DMG	2 S Ridgefield, CT	Downed powerline by tree limbs on Silver Spring Ln.
Jul 3, 5:48 PM EDT	TSTM WND DMG	2 S Ridgefield, CT	Downed powerline by tree limbs on Silver Spring Ln.
Jul 3, 5:48 PM EDT	TSTM WND DMG	3 Sse Ridgefield, CT	Tree down across Ruscoe Rd.
Jul 3, 5:48 PM EDT	TSTM WND DMG	3 Sse Ridgefield, CT	Tree down across Ruscoe Rd.

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 3, 2:21 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.7 hours before the alert went out and 56 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: 101 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 1170 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

322 
WUUS51 KOKX 032139
SVROKX
CTC001-NYC119-032230-
/O.NEW.KOKX.SV.W.0021.230703T2139Z-230703T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
539 PM EDT Mon Jul 3 2023

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Southern Fairfield County in southern Connecticut...
  Northern Westchester County in southeastern New York...

* Until 630 PM EDT.

* At 539 PM EDT, a severe thunderstorm was located near Bedford, or 7
  miles east of Mount Kisco, moving east at 20 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to trees and power lines.

* This severe thunderstorm will be near...
  Stamford around 545 PM EDT.
  New Canaan around 555 PM EDT.
  Darien and Wilton around 600 PM EDT.
  Norwalk around 605 PM EDT.
  Weston around 610 PM EDT.
  Westport around 620 PM EDT.
  Bridgeport and Fairfield around 630 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4128 7320 4111 7329 4112 7330 4109 7334
      4105 7338 4119 7371 4133 7366
TIME...MOT...LOC 2139Z 285DEG 18KT 4123 7359 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JT

2 follow-up statements

473 
WWUS51 KOKX 032201
SVSOKX

Severe Weather Statement
National Weather Service New York NY
601 PM EDT Mon Jul 3 2023

NYC119-032210-
/O.CAN.KOKX.SV.W.0021.000000T0000Z-230703T2230Z/
Westchester NY-
601 PM EDT Mon Jul 3 2023

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WESTCHESTER COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4129 7324 4128 7324 4128 7320 4111 7329
      4112 7330 4111 7331 4116 7352 4120 7351
      4121 7348 4126 7352 4131 7352 4131 7346
TIME...MOT...LOC 2200Z 278DEG 18KT 4121 7344 

$$

CTC001-032230-
/O.CON.KOKX.SV.W.0021.000000T0000Z-230703T2230Z/
Fairfield CT-
601 PM EDT Mon Jul 3 2023

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR SOUTHERN FAIRFIELD COUNTY...

At 600 PM EDT, a severe thunderstorm was located over Wilton, or near
New Canaan, moving east at 20 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.

This severe storm will be near...
  Norwalk and Wilton around 605 PM EDT.
  Weston around 610 PM EDT.
  Westport around 615 PM EDT.
  Bridgeport and Fairfield around 630 PM EDT.
  Trumbull around 635 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4129 7324 4128 7324 4128 7320 4111 7329
      4112 7330 4111 7331 4116 7352 4120 7351
      4121 7348 4126 7352 4131 7352 4131 7346
TIME...MOT...LOC 2200Z 278DEG 18KT 4121 7344 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JT

524 
WWUS51 KOKX 032227
SVSOKX

Severe Weather Statement
National Weather Service New York NY
627 PM EDT Mon Jul 3 2023

CTC001-032237-
/O.EXP.KOKX.SV.W.0021.000000T0000Z-230703T2230Z/
Fairfield CT-
627 PM EDT Mon Jul 3 2023

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FAIRFIELD COUNTY WILL
EXPIRE AT 630 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 4129 7324 4128 7324 4128 7320 4111 7329
      4112 7330 4111 7331 4116 7352 4120 7351
      4121 7348 4126 7352 4131 7352 4131 7346
TIME...MOT...LOC 2227Z 285DEG 18KT 4118 7327 

$$

JT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 11:21 PM EDT	Special Weather Statement	OKX	Bronx, Kings, New York, Richmond	54 min
Jul 2, 11:22 PM EDT	Special Marine Warning	OKX		58 min
Jul 2, 11:27 PM EDT	Severe Thunderstorm Warning	OKX	Richmond	35 min
Jul 3, 3:15 PM EDT	Areal Flood Advisory	OKX	Orange	75 min
Jul 3, 3:39 PM EDT	Coastal Flood Statement	OKX	Kings, Queens, Richmond, Westchester	35 hr
Jul 3, 3:39 PM EDT	Coastal Flood Advisory	OKX	Nassau, Queens	33 hr
Jul 3, 3:45 PM EDT	Special Weather Statement	OKX	Orange	45 min
Jul 3, 3:53 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	37 min
Jul 3, 4:04 PM EDT	Areal Flood Advisory	OKX	Orange	63 min
Jul 3, 4:29 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Putnam, Rockland, Westchester	46 min
Jul 3, 4:35 PM EDT	Areal Flood Advisory	OKX	Putnam, Rockland, Westchester	52 min
Jul 3, 5:01 PM EDT	Severe Thunderstorm Warning	OKX	Putnam, Westchester	44 min
Jul 3, 5:11 PM EDT	Areal Flood Advisory	OKX	Putnam, Westchester	51 min
Jul 3, 5:43 PM EDT	Areal Flood Advisory	OKX	Westchester	62 min
Jul 3, 6:29 PM EDT	Special Weather Statement	OKX	Orange	46 min
Jul 3, 6:31 PM EDT	Special Marine Warning	OKX		34 min
Jul 3, 6:43 PM EDT	Areal Flood Advisory	OKX	Orange	92 min
Jul 2, 11:35 PM EDT	Special Weather Statement	OKX		55 min
Jul 3, 12:46 AM EDT	Special Weather Statement	OKX		44 min
Jul 3, 6:26 PM EDT	Special Weather Statement	OKX		49 min
Jul 3, 7:25 PM EDT	Special Weather Statement	OKX		50 min

Nearby

Severe Thunderstorm Warnings in New York, 2023 Severe Thunderstorm Warnings in Connecticut, 2023 Every severe thunderstorm warning in 2023

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.