Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 112, NWS Buffalo, NY

October 15, 20215 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Oct 15, 2021, 6:15 PM EDT for 5 counties in New York. It was in force for 45 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, 6:15 PM EDT (22:15 UTC)
Expired: Oct 15, 2021, 7:00 PM EDT
In force: 45 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 37 km from the middle of the area, began a volume at 22:15 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, 10.3 hours before the alert went out and 33 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.

736 
WUUS51 KBUF 152215
SVRBUF
NYC029-037-051-055-121-152300-
/O.NEW.KBUF.SV.W.0112.211015T2215Z-211015T2300Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Northern Wyoming County in western New York...
  Northeastern Erie County in western New York...
  Northwestern Livingston County in western New York...
  Genesee County in western New York...
  Southwestern Monroe County in western New York...

* Until 700 PM EDT.

* At 614 PM EDT, a severe thunderstorm was located over Darien Lakes
  State Park, moving east at 30 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...
  Batavia, Darien Lakes State Park, Marilla, Le Roy, Pembroke,
  Bennington, Akron, Alden, Attica and Pavilion.

This includes Interstate 90 between exits 48A and 47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4279 7856 4302 7859 4313 7791 4274 7784
TIME...MOT...LOC 2214Z 260DEG 25KT 4294 7841 

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

$$

Welch

2 follow-up statements

063 
WWUS51 KBUF 152235
SVSBUF

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

NYC029-152244-
/O.CAN.KBUF.SV.W.0112.000000T0000Z-211015T2300Z/
Erie NY-
635 PM EDT Fri Oct 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4281 7840 4305 7841 4313 7791 4274 7784
TIME...MOT...LOC 2234Z 269DEG 22KT 4287 7829 

$$

NYC037-051-055-121-152300-
/O.CON.KBUF.SV.W.0112.000000T0000Z-211015T2300Z/
Wyoming NY-Livingston NY-Genesee NY-Monroe NY-
635 PM EDT Fri Oct 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHERN WYOMING...NORTHWESTERN LIVINGSTON...GENESEE AND
SOUTHWESTERN MONROE COUNTIES...

At 634 PM EDT, a severe thunderstorm was located over Attica, or near
Darien Lakes State Park, moving east at 25 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...
Batavia, Darien Lakes State Park, Le Roy, Bennington, Attica,
Pavilion, Byron, Oakfield, York and Stafford.

This includes Interstate 90 between exits 48 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 this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4281 7840 4305 7841 4313 7791 4274 7784
TIME...MOT...LOC 2234Z 269DEG 22KT 4287 7829 

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

$$

Mitchell

488 
WWUS51 KBUF 152258
SVSBUF

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

NYC037-051-055-121-152308-
/O.EXP.KBUF.SV.W.0112.000000T0000Z-211015T2300Z/
Wyoming NY-Livingston NY-Genesee NY-Monroe NY-
658 PM EDT Fri Oct 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WYOMING...
NORTHWESTERN LIVINGSTON...GENESEE AND SOUTHWESTERN MONROE COUNTIES
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 heavy rain 
is still possible with this thunderstorm.

LAT...LON 4281 7840 4305 7841 4313 7791 4274 7784
TIME...MOT...LOC 2258Z 260DEG 25KT 4289 7811 

$$

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, 6:30 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.