Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 113, NWS Buffalo, NY

October 15, 2021Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Oct 15, 2021, 6:30 PM EDT for Chautauqua County, New York. It was in force for 30 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, 6:30 PM EDT (22:30 UTC)
Expired: Oct 15, 2021, 7:00 PM EDT
In force: 30 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 72 km from the middle of the area, began a volume at 22:30 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, 10.5 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: 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.

985 
WUUS51 KBUF 152230
SVRBUF
NYC013-152300-
/O.NEW.KBUF.SV.W.0113.211015T2230Z-211015T2300Z/

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

The National Weather Service in Buffalo has issued a

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

* Until 700 PM EDT.

* At 630 PM EDT, a severe thunderstorm was located near Lake Erie
  State Park, or near Fredonia, moving northeast at 20 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, Silver Creek, Lake Erie State Park, SUNY
  Fredonia, Portland, Sheridan, Stockton, Brocton and Arkwright.

This includes Interstate 90 near exit 59.
 
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 4240 7951 4259 7923 4260 7918 4246 7906
      4238 7906 4225 7938
TIME...MOT...LOC 2230Z 238DEG 17KT 4237 7937 

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

$$

Mitchell

1 follow-up statement

442 
WWUS51 KBUF 152257
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
657 PM EDT Fri Oct 15 2021

NYC013-152307-
/O.EXP.KBUF.SV.W.0113.000000T0000Z-211015T2300Z/
Chautauqua NY-
657 PM EDT Fri Oct 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHAUTAUQUA COUNTY
WILL EXPIRE AT 700 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4240 7951 4259 7923 4260 7918 4246 7906
      4238 7906 4225 7938
TIME...MOT...LOC 2257Z 238DEG 17KT 4243 7924 

$$

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, 5:53 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	22 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

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.