Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 111, NWS Buffalo, NY

October 15, 2021Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Oct 15, 2021, 5:53 PM EDT for Chautauqua County, New York. It was in force for 22 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 15, 2021, 5:53 PM EDT (21:53 UTC)
Expired: Oct 15, 2021, 6:15 PM EDT
In force: 22 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 90 km from the middle of the area, began a volume at 21:52 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 90 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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 554 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: -28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

303 
WUUS51 KBUF 152153
SVRBUF
NYC013-152215-
/O.NEW.KBUF.SV.W.0111.211015T2153Z-211015T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
553 PM EDT Fri Oct 15 2021

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Central Chautauqua County in western New York...

* Until 615 PM EDT.

* At 552 PM EDT, a severe thunderstorm was located over Westfield, or
  17 miles southwest of Fredonia, moving northeast at 25 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Locations impacted include...
  Dunkirk, Fredonia, Westfield, Mayville, Lake Erie State Park, SUNY
  Fredonia, Portland, Stockton, Brocton and Cassadaga.

This includes Interstate 90 near exit 60.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4238 7964 4244 7950 4249 7945 4253 7938
      4235 7920 4217 7957 4231 7974
TIME...MOT...LOC 2152Z 234DEG 21KT 4228 7959 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Mitchell

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 15, 1:27 PM EDT	Small Craft Advisory	BUF		5 days
Oct 15, 4:51 PM EDT	Special Marine Warning	BUF		39 min
Oct 15, 5:28 PM EDT	Special Weather Statement	BUF	Erie	47 min
Oct 15, 5:37 PM EDT	Special Weather Statement	BUF	Chautauqua	23 min
Oct 15, 6:04 PM EDT	Tornado Warning	BUF	Chautauqua	26 min
Oct 15, 6:15 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Livingston, Monroe, Wyoming	45 min
Oct 15, 6:30 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	30 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.