Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 74, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Sep 1, 2021, 10:20 PM EDT for Greater Bridgeport Planning Region, Naugatuck Valley Planning Region, Connecticut; Westchester County, New York. It was in force for 55 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
- Sep 1, 2021, 10:20 PM EDT (02:20 UTC)
- Expired
- Sep 1, 2021, 11:15 PM EDT
- In force
- 55 min
- Issued by
- NWS New York, NY
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 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), 48 km from the middle of the area, began a volume at 02:22 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 |
|---|---|---|---|
| Sep 1, 11:00 PM EDT | TSTM WND DMG | 3 Ssw Monroe, CT | LARGE TREE SNAPPED IN HALF ON COUNTRYSIDE DRIVE. |
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 |
|---|---|---|---|
| Sep 1, 6:22 PM EDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 2.3 hours before the alert went out and 48 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.
- Mixed-layer CAPE
- 123 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 456 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
519
WUUS51 KOKX 020220
SVROKX
CTC001-009-NYC119-020315-
/O.NEW.KOKX.SV.W.0074.210902T0220Z-210902T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
1020 PM EDT Wed Sep 1 2021
The National Weather Service in Upton NY has issued a
* Severe Thunderstorm Warning for...
Southern Fairfield County in southern Connecticut...
South central New Haven County in southern Connecticut...
Southern Westchester County in southeastern New York...
* Until 1115 PM EDT.
* At 1019 PM EDT, severe thunderstorms were located along a line
extending from Bedford to near Bayville, moving northeast at 20
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Severe thunderstorms will be near...
New Canaan around 1045 PM EDT.
Ridgefield and Wilton around 1055 PM EDT.
Weston around 1105 PM EDT.
Trumbull and Redding around 1115 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 100 AM EDT for southern
Connecticut...and southeastern New York.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
A Tornado Watch remains in effect until 100 AM EDT for southern
Connecticut...and southeastern New York.
&&
LAT...LON 4138 7303 4121 7298 4119 7300 4120 7305
4117 7309 4114 7309 4116 7317 4110 7325
4112 7330 4109 7334 4105 7338 4099 7356
4100 7359 4097 7362 4097 7365 4093 7369
4093 7371 4120 7376
TIME...MOT...LOC 0219Z 243DEG 17KT 4121 7365 4094 7358
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
NV1 follow-up statement
713
WWUS51 KOKX 020315
SVSOKX
Severe Weather Statement
National Weather Service New York NY
1115 PM EDT Wed Sep 1 2021
CTC001-009-NYC119-020323-
/O.EXP.KOKX.SV.W.0074.000000T0000Z-210902T0315Z/
Fairfield CT-New Haven CT-Westchester NY-
1115 PM EDT Wed Sep 1 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FAIRFIELD...SOUTH
CENTRAL NEW HAVEN AND SOUTHERN WESTCHESTER COUNTIES WILL EXPIRE AT
1115 PM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Tornado Watch remains in effect until 100 AM EDT for southern
Connecticut...and southeastern New York.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Upton NY.
Remember, a Severe Thunderstorm Warning still remains in effect for
Eastern Suffolk, Southeastern Fairfield, and Southern New Haven.
LAT...LON 4138 7303 4121 7298 4119 7300 4120 7305
4117 7309 4114 7309 4116 7317 4110 7325
4112 7330 4109 7334 4105 7338 4099 7356
4100 7359 4097 7362 4097 7365 4093 7369
4093 7371 4120 7376
TIME...MOT...LOC 0313Z 243DEG 17KT 4132 7335 4105 7329
$$
NVThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 9:25 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region | 65 min |
| Sep 1, 10:08 PM EDT | Flash Flood Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 4 hr |
| Sep 1, 11:11 PM EDT | Severe Thunderstorm Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 64 min |
| Sep 2, 12:06 AM EDT | Flash Flood Warning | OKX | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 5 hr |
| Sep 2, 12:13 AM EDT | Severe Thunderstorm Warning | OKX | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 92 min |
| Sep 2, 12:53 AM EDT | River Flood Warning | OKX | Naugatuck Valley Planning Region | 5 hr |
| Sep 2, 1:06 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region | 4 hr |
| Sep 2, 1:15 AM EDT | River Flood Warning | OKX | Southeastern Connecticut Planning Region | 21 hr |
| Sep 2, 1:19 AM EDT | River Flood Warning | OKX | Southeastern Connecticut Planning Region | 8 hr |
| Sep 2, 2:30 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region | 8 hr |
| Sep 2, 5:01 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region | 3 hr |
| Sep 2, 5:23 AM EDT | Areal Flood Warning | OKX | Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region | 19 hr |
| Sep 2, 10:07 AM EDT | Areal Flood Warning | OKX | Greater Bridgeport Planning Region, Naugatuck Valley Planning Region | 15 hr |
| Sep 1, 8:32 PM EDT | Severe Thunderstorm Warning | OKX | New York, Richmond | 43 min |
| Sep 1, 9:03 PM EDT | Severe Thunderstorm Warning | OKX | Bronx, Kings, Nassau, New York, Queens, Westchester | 42 min |
| Sep 1, 9:06 PM EDT | Tornado Warning | OKX | Bronx, New York, Westchester | 24 min |
| Sep 1, 9:15 PM EDT | Special Marine Warning | OKX | 60 min | |
| Sep 1, 9:25 PM EDT | Special Marine Warning | OKX | 65 min | |
| Sep 1, 9:28 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Westchester | 2 hr |
| Sep 1, 9:34 PM EDT | Special Marine Warning | OKX | 12 min | |
| Sep 1, 9:56 PM EDT | Special Marine Warning | OKX | 34 min | |
| Sep 1, 9:57 PM EDT | Severe Thunderstorm Warning | OKX | Kings, Nassau, Queens | 48 min |
| Sep 1, 10:09 PM EDT | Special Marine Warning | OKX | 96 min | |
| Sep 1, 10:12 PM EDT | Special Marine Warning | OKX | 20 min | |
| Sep 1, 10:26 PM EDT | Special Marine Warning | OKX | 64 min | |
| Sep 1, 10:30 PM EDT | Severe Thunderstorm Warning | OKX | Nassau, Suffolk | 45 min |
| Sep 1, 10:39 PM EDT | Tornado Warning | OKX | Suffolk | 36 min |
| Sep 1, 10:44 PM EDT | Severe Thunderstorm Warning | OKX | Nassau | 46 min |
| Sep 1, 10:47 PM EDT | Special Marine Warning | OKX | 118 min | |
| Sep 1, 10:55 PM EDT | Special Marine Warning | OKX | 45 min | |
| Sep 1, 11:13 PM EDT | Flash Flood Warning | OKX | Suffolk | 6 hr |
| Sep 1, 11:19 PM EDT | Special Marine Warning | OKX | 86 min | |
| Sep 1, 11:54 PM EDT | Flash Flood Warning | OKX | Bronx, Kings, New York, Queens, Richmond, Westchester | 3 hr |
| Sep 2, 12:25 AM EDT | Flash Flood Warning | OKX | Nassau, Queens, Suffolk | 4 hr |
| Sep 2, 12:28 AM EDT | Special Marine Warning | OKX | 92 min | |
| Sep 2, 12:48 AM EDT | River Flood Warning | OKX | Orange, Ulster | 12 hr |
| Sep 2, 1:50 AM EDT | Special Weather Statement | OKX | Suffolk | 40 min |
| Sep 2, 1:57 AM EDT | Special Marine Warning | OKX | 80 min | |
| Sep 2, 2:53 AM EDT | Areal Flood Warning | OKX | Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more | 7 hr |
| Sep 2, 3:50 AM EDT | Rip Current Statement | OKX | Kings, Nassau, Queens, Suffolk | 16 hr |
| Sep 2, 4:38 AM EDT | Areal Flood Advisory | OKX | Nassau, Queens, Suffolk | 3 hr |
| Sep 2, 4:55 AM EDT | Areal Flood Advisory | OKX | Suffolk | 3 hr |
| Sep 2, 7:49 AM EDT | Areal Flood Advisory | OKX | Orange, Putnam, Rockland, Westchester | 10 hr |
| Sep 2, 10:16 AM EDT | Areal Flood Warning | OKX | Bronx, Nassau, Rockland, Westchester | 25 hr |
| Sep 2, 10:59 AM EDT | Small Craft Advisory | OKX | 19 hr |
Nearby
Severe Thunderstorm Warnings in Connecticut, 2021Severe Thunderstorm Warnings in New York, 2021Every 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.