Alert archive / New York / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 101, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Sep 2, 2026, 8:40 AM EDT for 6 counties in New York. It was in force for 65 min. 2 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 2, 2026, 8:40 AM EDT (12:40 UTC)
- Expired
- Sep 2, 2026, 9:45 AM EDT
- In force
- 65 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Wyoming County, NY
The radar
The Buffalo radar (KBUF), 84 km from the middle of the area, began a volume at 12:40 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 2, 8:43 AM EDT | TSTM WND DMG | Leicester, NY | Trees down. |
| Sep 2, 8:57 AM EDT | TSTM WND DMG | Livonia, NY | Trees down. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 0.7 hours before the alert went out and 80 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
- 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
The text
As transmitted.
630
WUUS51 KBUF 021240
SVRBUF
NYC029-037-051-055-069-121-021345-
/O.NEW.KBUF.SV.W.0101.260902T1240Z-260902T1345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
840 AM EDT Wed Sep 2 2026
The National Weather Service in Buffalo has issued a
* Severe Thunderstorm Warning for...
Wyoming County in western New York...
Northeastern Erie County in western New York...
Livingston County in western New York...
Southern Genesee County in western New York...
Southwestern Monroe County in western New York...
Ontario County in western New York...
* Until 945 AM EDT.
* At 839 AM EDT, severe thunderstorms were located along a line
extending from near Scottsville to near Batavia to Clarence, moving
southeast at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Law enforcement.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Clarence, Batavia, Canandaigua, Geneseo, Dansville, Darien Lakes
State Park, Letchworth State Park, Le Roy, Perry, and Warsaw.
This includes the following highways...
Interstate 390 between exits 4 and 12.
Interstate 90 between exits 46 and 47.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 4252 7821 4299 7869 4298 7828 4313 7781
4277 7702 4276 7731 4267 7737 4258 7737
4258 7766 4254 7766 4253 7772 4251 7772
TIME...MOT...LOC 1239Z 306DEG 27KT 4306 7782 4294 7820 4295 7857
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mitchell3 follow-up statements
017
WWUS51 KBUF 021316
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
916 AM EDT Wed Sep 2 2026
NYC029-037-021322-
/O.CAN.KBUF.SV.W.0101.000000T0000Z-260902T1345Z/
Erie NY-Genesee NY-
916 AM EDT Wed Sep 2 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE AND SOUTHERN
GENESEE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
&&
LAT...LON 4267 7836 4282 7803 4299 7750 4277 7702
4276 7731 4267 7737 4258 7737 4258 7766
4254 7766 4253 7772 4251 7772 4252 7821
TIME...MOT...LOC 1312Z 299DEG 29KT 4298 7743 4282 7786 4267 7829
$$
NYC051-055-069-121-021345-
/O.CON.KBUF.SV.W.0101.000000T0000Z-260902T1345Z/
Wyoming NY-Livingston NY-Monroe NY-Ontario NY-
916 AM EDT Wed Sep 2 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM EDT
FOR EASTERN WYOMING...LIVINGSTON...SOUTH CENTRAL MONROE AND ONTARIO
COUNTIES...
At 912 AM EDT, severe thunderstorms were located along a line
extending from Victor to near Geneseo to 6 miles south of Varysburg,
moving southeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Law enforcement.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Canandaigua, Geneseo, Dansville, Letchworth State Park, Perry,
Warsaw, Avon, Mount Morris, Honeoye Falls, and Conesus.
This includes Interstate 390 between exits 4 and 10.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 4267 7836 4282 7803 4299 7750 4277 7702
4276 7731 4267 7737 4258 7737 4258 7766
4254 7766 4253 7772 4251 7772 4252 7821
TIME...MOT...LOC 1312Z 299DEG 29KT 4298 7743 4282 7786 4267 7829
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mitchell749
WWUS51 KBUF 021336
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
936 AM EDT Wed Sep 2 2026
NYC055-121-021346-
/O.CAN.KBUF.SV.W.0101.000000T0000Z-260902T1345Z/
Wyoming NY-Monroe NY-
936 AM EDT Wed Sep 2 2026
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WYOMING AND SOUTH
CENTRAL MONROE COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
&&
LAT...LON 4252 7804 4253 7804 4253 7806 4275 7764
4290 7730 4277 7702 4276 7731 4267 7737
4258 7737 4258 7766 4254 7766 4253 7772
4251 7772
TIME...MOT...LOC 1336Z 294DEG 33KT 4289 7726 4276 7749 4246 7823
$$
NYC051-069-021345-
/O.CON.KBUF.SV.W.0101.000000T0000Z-260902T1345Z/
Livingston NY-Ontario NY-
936 AM EDT Wed Sep 2 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 AM EDT
FOR SOUTHERN LIVINGSTON AND SOUTHERN ONTARIO COUNTIES...
At 936 AM EDT, severe thunderstorms were located along a line
extending from Canandaigua to near Honeoye to near Houghton, moving
southeast at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Law enforcement.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Canandaigua, Dansville, Conesus, Bristol, Naples, Honeoye, Gorham,
Groveland, Springwater, and Canadice.
This includes Interstate 390 between exits 4 and 5.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
LAT...LON 4252 7804 4253 7804 4253 7806 4275 7764
4290 7730 4277 7702 4276 7731 4267 7737
4258 7737 4258 7766 4254 7766 4253 7772
4251 7772
TIME...MOT...LOC 1336Z 294DEG 33KT 4289 7726 4276 7749 4246 7823
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Mitchell663
WWUS51 KBUF 021344
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
944 AM EDT Wed Sep 2 2026
NYC051-069-021353-
/O.EXP.KBUF.SV.W.0101.000000T0000Z-260902T1345Z/
Livingston NY-Ontario NY-
944 AM EDT Wed Sep 2 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LIVINGSTON AND
SOUTHERN ONTARIO COUNTIES WILL EXPIRE AT 945 AM EDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.
&&
LAT...LON 4252 7804 4253 7804 4253 7806 4275 7764
4290 7730 4277 7702 4276 7731 4267 7737
4258 7737 4258 7766 4254 7766 4253 7772
4251 7772
TIME...MOT...LOC 1343Z 306DEG 27KT 4286 7721 4273 7744 4243 7818
$$
MitchellThe office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 6:24 AM EDT | Special Marine Warning | BUF | 66 min | |
| Sep 2, 6:26 AM EDT | Special Marine Warning | BUF | 94 min | |
| Sep 2, 6:46 AM EDT | Special Marine Warning | BUF | 68 min | |
| Sep 2, 7:18 AM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Monroe, Niagara, Orleans, Wyoming | 57 min |
| Sep 2, 7:40 AM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Erie, Livingston, Wyoming | 50 min |
| Sep 2, 7:59 AM EDT | Special Marine Warning | BUF | 91 min | |
| Sep 2, 8:18 AM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Livingston, Monroe, Niagara, Ontario and 2 more | 57 min |
| Sep 2, 9:16 AM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Oswego, Wayne | 59 min |
| Sep 2, 9:28 AM EDT | Special Marine Warning | BUF | 62 min | |
| Sep 2, 5:18 PM EDT | Special Marine Warning | BUF | 117 min | |
| Sep 2, 5:32 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Livingston, Wyoming | 58 min |
| Sep 2, 5:43 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Monroe, Niagara, Orleans | 77 min |
| Sep 2, 6:07 PM EDT | Tornado Warning | BUF | Niagara, Orleans | 23 min |
| Sep 2, 6:15 PM EDT | Special Marine Warning | BUF | 2 hr | |
| Sep 2, 6:17 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Livingston, Monroe, Ontario, Wyoming | 58 min |
| Sep 2, 6:21 PM EDT | Special Marine Warning | BUF | 114 min | |
| Sep 2, 6:28 PM EDT | Tornado Warning | BUF | Genesee, Niagara, Orleans | 32 min |
| Sep 2, 6:47 PM EDT | Severe Thunderstorm Warning | 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 | BUF | Genesee, Monroe, Orleans | 35 min |
| Sep 2, 7:04 PM EDT | Special Marine Warning | BUF | 116 min | |
| Sep 2, 7:14 PM EDT | Special Marine Warning | BUF | 43 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, 7:30 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Chautauqua, Erie, Wyoming | 60 min |
| Sep 2, 7:40 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga, Genesee, Livingston, Monroe, Ontario, Oswego and 2 more | 65 min |
| Sep 2, 7:56 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Chautauqua, Livingston, Wyoming | 79 min |
| Sep 2, 7:56 PM EDT | Tornado Warning | BUF | Allegany, Livingston, Wyoming | 34 min |
Nearby
Severe Thunderstorm Warnings in New York, 2026Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.