Alert archive / New York / Tornado Watches in 2026

Tornado Watch 645

September 2, 202629 counties in New York

The Storm Prediction Center issued this tornado watch at Sep 2, 2026, 4:41 PM EDT for 29 counties in New York. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Sep 2, 2026, 4:41 PM EDT (20:41 UTC)
Expired: Sep 2, 2026, 11:00 PM EDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 29 counties

Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Erie County, NY, Genesee County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Niagara County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Orleans County, NY, Oswego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY

The radar

The Ft Drum radar (KTYX), 107 km from the middle of the area, began a volume at 20:42 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 50%
One or more EF2 to EF5 tornadoes: 30%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Sep 2, 5:32 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Wyoming	58 min
Sep 2, 5:43 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BUF	Erie, Genesee, Monroe, Niagara, Orleans	77 min
Sep 2, 6:07 PM EDT	Tornado Warning Tornado observed	BUF	Niagara, Orleans	23 min
Sep 2, 6:17 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Monroe, Ontario, Wyoming	58 min
Sep 2, 6:28 PM EDT	Tornado Warning	BUF	Genesee, Niagara, Orleans	32 min
Sep 2, 6:39 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BGM	Schuyler, Steuben, Yates	66 min
Sep 2, 6:47 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BUF	Erie, Genesee, Livingston, Monroe, Niagara, Orleans and 1 more	73 min
Sep 2, 6:51 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Ontario, Wayne	54 min
Sep 2, 6:55 PM EDT	Tornado Warning Tornado observed	BUF	Genesee, Monroe, Orleans	35 min
Sep 2, 7:06 PM EDT	Tornado Warning	BGM	Steuben	24 min
Sep 2, 7:26 PM EDT	Flash Flood Warning	BUF	Erie, Genesee, Niagara, Orleans	4 hr
Sep 2, 7:28 PM EDT	Tornado Warning	BUF	Genesee, Livingston, Monroe, Wyoming	47 min
Sep 2, 7:29 PM EDT	Tornado Warning	BGM	Steuben	46 min
Sep 2, 7:30 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Wyoming	60 min
Sep 2, 7:40 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BUF	Cayuga, Genesee, Livingston, Monroe, Ontario, Oswego and 2 more	65 min
Sep 2, 7:56 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BUF	Allegany, Cattaraugus, Chautauqua, Livingston, Wyoming	79 min
Sep 2, 7:56 PM EDT	Tornado Warning	BUF	Allegany, Livingston, Wyoming	34 min
Sep 2, 8:05 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BGM	Cayuga, Seneca, Steuben, Yates	55 min
Sep 2, 8:18 PM EDT	Tornado Warning	BGM	Cayuga, Seneca	42 min
Sep 2, 8:37 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BGM	Cayuga, Chemung, Cortland, Onondaga, Schuyler, Seneca and 3 more	53 min
Sep 2, 8:41 PM EDT	Tornado Warning	BGM	Cayuga, Onondaga	34 min
Sep 2, 8:46 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus	4 hr
Sep 2, 8:53 PM EDT	Severe Thunderstorm Warning	BGM	Chemung	67 min
Sep 2, 8:59 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson	63 min
Sep 2, 9:06 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BGM	Broome, Cayuga, Chemung, Chenango, Cortland, Madison and 5 more	69 min
Sep 2, 9:09 PM EDT	Tornado Warning	BGM	Cayuga, Chenango, Cortland, Madison, Onondaga	22 min
Sep 2, 9:09 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	36 min
Sep 2, 9:59 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Delaware, Otsego, Tioga	46 min
Sep 2, 10:00 PM EDT	Severe Thunderstorm Warning Considerable damage threat	BUF	Cattaraugus, Chautauqua	75 min
Sep 2, 10:17 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	43 min
Sep 2, 10:19 PM EDT	Flash Flood Warning	BGM	Steuben	3 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.7 hours before the alert went out and 154 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: 1578 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 829 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 6.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 2, 6:04 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 6 more	116 min
Sep 2, 8:51 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 9 more	84 min
Sep 2, 2:50 PM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 14 more	115 min
Sep 2, 5:36 PM EDT	Mesoscale Discussion	SPC	Erie, Genesee, Livingston, Monroe, Niagara, Orleans and 1 more	84 min
Sep 2, 7:51 PM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Genesee and 10 more	84 min

Nearby

Tornado Watches in New York, 2026 Every tornado watch in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.