Alert archive / New York / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 13, NWS Buffalo, NY
NWS Buffalo, NY issued this severe thunderstorm warning at Apr 21, 2025, 5:53 PM EDT for 7 counties in New York. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 21, 2025, 5:53 PM EDT (21:53 UTC)
- Expired
- Apr 21, 2025, 7:00 PM EDT
- In force
- 67 min
- Issued by
- NWS Buffalo, NY
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Niagara County, NY, Orleans County, NY, Wyoming County, NY
The radar
The Buffalo radar (KBUF), 38 km from the middle of the area, began a volume at 21:57 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.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.9 hours before the alert went out and 37 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1489 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 366 m²/s²
- 0-3 km storm-relative helicity
- 423 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
697 WUUS51 KBUF 212153 SVRBUF NYC029-037-063-073-121-212300- /O.NEW.KBUF.SV.W.0013.250421T2153Z-250421T2300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Buffalo NY Issued by National Weather Service Pittsburgh PA 553 PM EDT Mon Apr 21 2025 The National Weather Service in Buffalo has issued a * Severe Thunderstorm Warning for... Northwestern Wyoming County in western New York... Northeastern Erie County in western New York... Southeastern Niagara County in western New York... Orleans County in western New York... Genesee County in western New York... * Until 700 PM EDT. * At 552 PM EDT, severe thunderstorms were located along a line extending from near Pendleton to near Woodlawn Beach State Park, moving east at 30 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Akron, Alexander, Clarence Center, East Bethany, Ridgeway, Alabama, Depew, Clarence, Pembroke, and Bethany Center. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4337 7805 4284 7811 4281 7876 4320 7865 TIME...MOT...LOC 2152Z 258DEG 28KT 4313 7876 4280 7891 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ DJS
4 follow-up statements
365
WUUS51 KBUF 212204
SVRBUF
NYC009-013-212300-
/O.NEW.KBUF.SV.W.0013.250421T2204Z-250421T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
Issued by National Weather Service Cleveland OH
604 PM EDT Mon Apr 21 2025
The National Weather Service in Buffalo has issued a
* Severe Thunderstorm Warning for...
Southwestern Cattaraugus County in western New York...
Southern Chautauqua County in western New York...
* Until 700 PM EDT.
* At 603 PM EDT, a severe thunderstorm was located 7 miles west of
Lakewood, or 12 miles west of Jamestown, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Jamestown, Salamanca, Allegany State Park, Lakewood, Falconer,
Clymer, Long Point State Park, Jamestown West, Frewsburg, and
Busti.
This includes Interstate 86 between exits 6 and 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4200 7964 4215 7961 4233 7862 4200 7858
TIME...MOT...LOC 2203Z 260DEG 42KT 4208 7947
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
HSK658
WWUS51 KBUF 212217
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
Issued by National Weather Service Cleveland OH
617 PM EDT Mon Apr 21 2025
NYC009-013-212300-
/O.CON.KBUF.SV.W.0013.000000T0000Z-250421T2300Z/
Cattaraugus NY-Chautauqua NY-
617 PM EDT Mon Apr 21 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES...
At 617 PM EDT, a severe thunderstorm was located over Jamestown,
moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Jamestown, Salamanca, Allegany State Park, Lakewood, Falconer, Long
Point State Park, Jamestown West, Frewsburg, Busti, and Great Valley.
This includes Interstate 86 between exits 7 and 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4200 7952 4218 7947 4233 7862 4200 7858
TIME...MOT...LOC 2217Z 255DEG 42KT 4214 7926
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
HSK856
WWUS51 KBUF 212233
SVSBUF
Severe Weather Statement
National Weather Service Buffalo NY
Issued by National Weather Service Cleveland OH
633 PM EDT Mon Apr 21 2025
NYC009-013-212300-
/O.CON.KBUF.SV.W.0013.000000T0000Z-250421T2300Z/
Cattaraugus NY-Chautauqua NY-
633 PM EDT Mon Apr 21 2025
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES...
At 632 PM EDT, a severe thunderstorm was located 12 miles west of
Salamanca, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Jamestown, Salamanca, Allegany State Park, Falconer, Jamestown West,
Frewsburg, Busti, Great Valley, Conewango, and Ellington.
This includes Interstate 86 between exits 11 and 23.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4200 7937 4222 7923 4233 7862 4200 7858
TIME...MOT...LOC 2232Z 256DEG 47KT 4221 7896
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
HSK451 WWUS51 KBUF 212257 SVSBUF Severe Weather Statement National Weather Service Buffalo NY Issued by National Weather Service Cleveland OH 657 PM EDT Mon Apr 21 2025 NYC009-013-212306- /O.EXP.KBUF.SV.W.0013.000000T0000Z-250421T2300Z/ Cattaraugus NY-Chautauqua NY- 657 PM EDT Mon Apr 21 2025 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CATTARAUGUS AND SOUTHEASTERN CHAUTAUQUA COUNTIES WILL EXPIRE AT 700 PM EDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. However, gusty winds and heavy rain are still possible with this thunderstorm. Remember, a Severe Thunderstorm Warning still remains in effect for north-central Cattaraugus county. && LAT...LON 4200 7937 4222 7923 4233 7862 4200 7858 TIME...MOT...LOC 2256Z 260DEG 42KT 4226 7860 $$ HSK
The office that day
Everything else NWS Buffalo, NY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 1:05 AM EDT | Wind Advisory | BUF | Chautauqua | 12 hr |
| Apr 21, 1:34 PM EDT | Small Craft Advisory | BUF | 33 hr | |
| Apr 21, 4:34 PM EDT | Special Marine Warning | BUF | 86 min | |
| Apr 21, 5:08 PM EDT | Special Weather Statement | BUF | Orleans | 37 min |
| Apr 21, 5:19 PM EDT | Special Marine Warning | BUF | 56 min | |
| Apr 21, 5:23 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Erie, Wyoming | 34 min |
| Apr 21, 5:33 PM EDT | Tornado Warning | BUF | Allegany, Cattaraugus, Erie, Wyoming | 27 min |
| Apr 21, 6:03 PM EDT | Areal Flood Warning | BUF | Erie, Niagara | 95 min |
| Apr 21, 6:11 PM EDT | Special Marine Warning | BUF | 64 min | |
| Apr 21, 6:19 PM EDT | Flash Flood Warning | BUF | Cattaraugus, Chautauqua | 3 hr |
| Apr 21, 6:41 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus, Erie, Wyoming | 58 min |
Nearby
Severe Thunderstorm Warnings in New York, 2025Every severe thunderstorm warning in 2025
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.