Alert archive / New York / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 72, NWS New York, NY
NWS New York, NY issued this severe thunderstorm warning at Sep 1, 2021, 9:25 PM EDT for 7 counties in New York; Greater Bridgeport Planning Region, Connecticut; Bergen County, Hudson County, New Jersey. It was in force for 65 min. 5 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
- Sep 1, 2021, 9:25 PM EDT (01:25 UTC)
- Expired
- Sep 1, 2021, 10:30 PM EDT
- In force
- 65 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, Bergen County, NJ, Hudson County, NJ, Bronx County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Queens County, NY, Rockland County, NY, Westchester County, NY
The radar
The Brookhaven radar (KOKX), 67 km from the middle of the area, began a volume at 01:28 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, 9:57 PM EDT | TSTM WND GST 72 | 2 N Glen Cove, NY | 72 MPH WIND GUST MEASURED AT BAYVILLE STATION ELEVATION: 45 FT. |
| Sep 1, 9:57 PM EDT | MARINE TSTM WIND 72 | 2 N Glen Cove, NY | 72 MPH WIND GUST MEASURED AT BAYVILLE STATION ELEVATION: 45 FT. |
| Sep 1, 10:09 PM EDT | TSTM WND DMG | 1 N Rye, NY | LARGE TREE DOWN ON NEW STREET TOOK SOME WIRES. |
| Sep 1, 10:15 PM EDT | TSTM WND DMG | 1 N Rye, NY | WIRES DOWN ACROSS NATOMA STREET AND PURCHASE STREET. |
| Sep 1, 10:17 PM EDT | TSTM WND DMG | 1 S Rye, NY | TREE DOWN ACROSS PLAYLAND PARKWAY BETWEEN FOREST AVE AND MIDLAND AVE. |
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, 1.4 hours before the alert went out and 67 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.
938
WUUS51 KOKX 020125
SVROKX
CTC001-NJC003-017-NYC005-047-059-061-081-087-119-020230-
/O.NEW.KOKX.SV.W.0072.210902T0125Z-210902T0230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
925 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...
Hudson County in northeastern New Jersey...
Southeastern Bergen County in northeastern New Jersey...
Westchester County in southeastern New York...
Queens County in southeastern New York...
Bronx County in southeastern New York...
Kings County in southeastern New York...
Rockland County in southeastern New York...
New York (Manhattan) County in southeastern New York...
Northern Nassau County in southeastern New York...
* Until 1030 PM EDT.
* At 925 PM EDT, severe thunderstorms were located along a line
extending from Norwood to Sands Point, moving northeast at 30 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Severe thunderstorms will be near...
Glen Cove around 930 PM EDT.
Rye and Nyack around 935 PM EDT.
White Plains and Tarrytown around 940 PM EDT.
Port Chester and Harrison around 945 PM EDT.
Ossining and Hawthorne around 950 PM EDT.
Mount Kisco and Greenwich around 1005 PM EDT.
Darien around 1010 PM EDT.
Stamford and Norwalk around 1015 PM EDT.
New Canaan around 1020 PM EDT.
Fairfield and Westport around 1030 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 100 AM EDT for southern
Connecticut...northeastern New Jersey...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...northeastern New Jersey...and southeastern New York.
&&
LAT...LON 4081 7414 4135 7376 4136 7361 4112 7323
4112 7330 4105 7337 4100 7359 4097 7362
4097 7365 4089 7374 4086 7375 4088 7372
4086 7366 4092 7364 4093 7351 4091 7349
4087 7346 4060 7395
TIME...MOT...LOC 0125Z 221DEG 24KT 4100 7393 4086 7370
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
NV1 follow-up statement
758
WWUS51 KOKX 020237
SVSOKX
Severe Weather Statement
National Weather Service New York NY
1037 PM EDT Wed Sep 1 2021
CTC001-NJC003-017-NYC005-047-059-061-081-087-119-020246-
/O.EXP.KOKX.SV.W.0072.000000T0000Z-210902T0230Z/
Fairfield CT-Hudson NJ-Bergen NJ-Westchester NY-Queens NY-Bronx NY-
Kings NY-Rockland NY-New York (Manhattan) NY-Nassau NY-
1037 PM EDT Wed Sep 1 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FAIRFIELD...HUDSON...
SOUTHEASTERN BERGEN...WESTCHESTER...QUEENS...BRONX...KINGS...
ROCKLAND...NEW YORK (MANHATTAN) AND NORTHERN NASSAU COUNTIES HAS
EXPIRED...
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
A Tornado Watch remains in effect until 100 AM EDT for southern
Connecticut...northeastern New Jersey...and southeastern New York.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Upton NY.
LAT...LON 4081 7414 4135 7376 4136 7361 4112 7323
4112 7330 4105 7337 4100 7359 4097 7362
4097 7365 4089 7374 4086 7375 4088 7372
4086 7366 4092 7364 4093 7351 4091 7349
4087 7346 4060 7395
TIME...MOT...LOC 0236Z 221DEG 24KT 4136 7352 4122 7329
$$
NVThe office that day
Everything else NWS New York, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 10:08 PM EDT | Flash Flood Warning | OKX | Nassau, Westchester | 4 hr |
| 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, 10:20 PM EDT | Severe Thunderstorm Warning | OKX | Westchester | 55 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, 11:11 PM EDT | Severe Thunderstorm Warning | OKX | Suffolk | 64 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, 12:13 AM EDT | Severe Thunderstorm Warning | OKX | Suffolk | 92 min |
| 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, 1:06 AM EDT | Areal Flood Warning | OKX | Orange, Putnam, Rockland, Westchester | 4 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, 2:30 AM EDT | Areal Flood Warning | OKX | Bronx, Nassau, Putnam, Queens, Rockland, Suffolk and 1 more | 8 hr |
| 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, 5:01 AM EDT | Areal Flood Warning | OKX | Orange, Putnam, Rockland, Westchester | 3 hr |
| Sep 2, 7:49 AM EDT | Areal Flood Advisory | OKX | Orange, Putnam, Rockland, Westchester | 10 hr |
| Sep 2, 10:07 AM EDT | Areal Flood Warning | OKX | Putnam, Rockland, Westchester | 15 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 | |
| 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, 12:53 AM EDT | River Flood Warning | OKX | Naugatuck Valley Planning Region | 5 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, 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 1, 8:15 PM EDT | Severe Thunderstorm Warning | OKX | Bergen, Essex, Hudson | 45 min |
Nearby
Severe Thunderstorm Warnings in New York, 2021Severe Thunderstorm Warnings in New Jersey, 2021Severe Thunderstorm Warnings in Connecticut, 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.