Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 114, NWS Buffalo, NY

October 21, 2021Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Oct 21, 2021, 5:09 PM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 33 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: Oct 21, 2021, 5:09 PM EDT (21:09 UTC)
Expired: Oct 21, 2021, 5:42 PM EDT
In force: 33 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 72 km from the middle of the area, began a volume at 21:11 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, 9.2 hours before the alert went out and 72 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

293 
WUUS51 KBUF 212109
SVRBUF
NYC009-013-212200-
/O.NEW.KBUF.SV.W.0114.211021T2109Z-211021T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
509 PM EDT Thu Oct 21 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cattaraugus County in western New York...
  Northeastern Chautauqua County in western New York...

* Until 600 PM EDT.

* At 509 PM EDT, a severe thunderstorm was located near Mayville, or
  10 miles southwest of Fredonia, moving northeast at 50 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor damage to vehicles is possible. Expect wind damage 
           to trees and power lines.

* Locations impacted include...
  Dunkirk, Fredonia, Westfield, Silver Creek, Mayville, Lake Erie
  State Park, SUNY Fredonia, Portland, Sheridan and Stockton.

This includes Interstate 90 between exits 59 and 58.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4256 7931 4260 7918 4244 7892 4221 7943
      4232 7958
TIME...MOT...LOC 2109Z 225DEG 42KT 4232 7944 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

HSK

2 follow-up statements

161 
WWUS51 KBUF 212133
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
533 PM EDT Thu Oct 21 2021

NYC009-013-212200-
/O.CON.KBUF.SV.W.0114.000000T0000Z-211021T2200Z/
Cattaraugus NY-Chautauqua NY-
533 PM EDT Thu Oct 21 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR WESTERN CATTARAUGUS AND NORTHEASTERN CHAUTAUQUA COUNTIES...

At 533 PM EDT, a severe thunderstorm was located over Silver Creek,
or 8 miles east of Dunkirk, moving northeast at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Minor damage to vehicles is possible. Expect wind damage to 
         trees and power lines.

Locations impacted include...
Silver Creek, Sheridan, Forestville, Perrysburg and Silver Creek
Reservoir.

This includes Interstate 90 near exit 58.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4255 7932 4257 7929 4260 7918 4245 7895
      4238 7916 4253 7934
TIME...MOT...LOC 2133Z 225DEG 42KT 4252 7917 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

HSK

638 
WWUS51 KBUF 212142
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
542 PM EDT Thu Oct 21 2021

NYC009-013-212151-
/O.CAN.KBUF.SV.W.0114.000000T0000Z-211021T2200Z/
Cattaraugus NY-Chautauqua NY-
542 PM EDT Thu Oct 21 2021

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN CATTARAUGUS AND
NORTHEASTERN CHAUTAUQUA COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Buffalo.

LAT...LON 4255 7932 4257 7929 4260 7918 4245 7895
      4238 7916 4253 7934
TIME...MOT...LOC 2140Z 225DEG 42KT 4259 7907 

$$

HSK

The office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 21, 4:42 AM EDT	Small Craft Advisory	BUF		33 hr
Oct 21, 4:53 PM EDT	Special Weather Statement	BUF	Chautauqua	37 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.