Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 60, NWS New York, NY

July 27, 2021Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 27, 2021, 7:35 PM EDT for Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Westchester County, New York. It was in force for 40 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 27, 2021, 7:35 PM EDT (23:35 UTC)
Expired: Jul 27, 2021, 8:15 PM EDT
In force: 40 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Brookhaven radar (KOKX), 69 km from the middle of the area, began a volume at 23:35 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 27, 7:40 PM EDT	TSTM WND DMG	3 Nw Ridgefield, CT	POLICE REPORT TREES DOWN ON ORENECA RD IN RIDGEFIELD.

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, 11.6 hours before the alert went out and 69 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2105 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 34 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

171 
WUUS51 KOKX 272335
SVROKX
CTC001-009-NYC119-280015-
/O.NEW.KOKX.SV.W.0060.210727T2335Z-210728T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
735 PM EDT Tue Jul 27 2021

The National Weather Service in Upton NY has issued a

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

* Until 815 PM EDT.

* At 735 PM EDT, a severe thunderstorm was located over Ridgefield,
  or 7 miles south of Danbury, moving east at 25 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 thunderstorm will be near...
  Wilton and Georgetown around 740 PM EDT.
  Weston around 750 PM EDT.
  Bethel and Redding around 755 PM EDT.
  Trumbull around 810 PM EDT.
  Shelton and Monroe around 815 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4129 7297 4119 7356 4136 7363 4137 7355
      4139 7354 4151 7320 4151 7316 4152 7316
      4155 7308
TIME...MOT...LOC 2335Z 251DEG 22KT 4130 7351 

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

Fig

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:28 PM EDT	Special Weather Statement	OKX		47 min
Jul 27, 7:32 PM EDT	Special Weather Statement	OKX		43 min
Jul 27, 6:10 PM EDT	Special Weather Statement	OKX	Orange	50 min
Jul 27, 6:42 PM EDT	Special Weather Statement	OKX	Putnam, Rockland, Westchester	48 min
Jul 27, 7:43 PM EDT	Special Marine Warning	OKX		92 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2021 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.