Alert archive / New York / Tornado Warnings in 2021

Tornado Warning 1, NWS Buffalo, NY

July 17, 2021Cattaraugus County, Erie County, New York

NWS Buffalo, NY issued this tornado warning at Jul 17, 2021, 3:15 PM EDT for Cattaraugus County, Erie 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: Jul 17, 2021, 3:15 PM EDT (19:15 UTC)
Expired: Jul 17, 2021, 3:45 PM EDT
In force: 30 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Cattaraugus County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 54 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 51 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: 558 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

191 
WFUS51 KBUF 171915
TORBUF
NYC009-029-171945-
/O.NEW.KBUF.TO.W.0001.210717T1915Z-210717T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Buffalo NY
315 PM EDT Sat Jul 17 2021

The National Weather Service in Buffalo has issued a

* Tornado Warning for...
  Northeastern Cattaraugus County in western New York...
  Southeastern Erie County in western New York...

* Until 345 PM EDT.
    
* At 314 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Ashford Hollow, or 16 miles north of Salamanca,
  moving northeast at 20 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Ashford Hollow around 320 PM EDT.
  Ashford around 325 PM EDT.
  Springville around 335 PM EDT.
  East Concord around 345 PM EDT.

Other locations impacted by this tornadic thunderstorm include East
Otto, West Valley, Lime Lake-Machias, Delevan, Sardinia and
Yorkshire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4245 7884 4263 7850 4257 7846 4252 7846
      4252 7843 4238 7834 4229 7873
TIME...MOT...LOC 1914Z 244DEG 15KT 4240 7873 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Mitchell

2 follow-up statements

909 
WWUS51 KBUF 171927
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
327 PM EDT Sat Jul 17 2021

NYC009-029-171945-
/O.CON.KBUF.TO.W.0001.000000T0000Z-210717T1945Z/
Cattaraugus NY-Erie NY-
327 PM EDT Sat Jul 17 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM EDT FOR
NORTHEASTERN CATTARAUGUS AND SOUTHEASTERN ERIE COUNTIES...
    
At 326 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Ashford Hollow, or 18 miles north of Salamanca,
moving east at 20 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Chaffee around 355 PM EDT.
  Arcade around 400 PM EDT.

Other locations impacted by this tornadic thunderstorm include West
Valley, Lime Lake-Machias, Delevan, Sardinia and Yorkshire.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4263 7850 4257 7846 4252 7846 4252 7843
      4238 7834 4232 7861 4250 7874
TIME...MOT...LOC 1926Z 251DEG 18KT 4243 7862 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Mitchell

452 
WWUS51 KBUF 171950
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
350 PM EDT Sat Jul 17 2021

NYC009-029-171959-
/O.EXP.KBUF.TO.W.0001.000000T0000Z-210717T1945Z/
Cattaraugus NY-Erie NY-
350 PM EDT Sat Jul 17 2021

...THE TORNADO WARNING FOR NORTHEASTERN CATTARAUGUS AND SOUTHEASTERN
ERIE COUNTIES HAS EXPIRED...
    
The tornado threat has diminished and the Tornado Warning has been 
cancelled. However, damaging winds remain likely and a Severe 
Thunderstorm Warning remains in effect for the area.

LAT...LON 4263 7850 4257 7846 4252 7846 4252 7843
      4238 7834 4232 7861 4250 7874
TIME...MOT...LOC 1949Z 244DEG 15KT 4247 7852 

$$

Mitchell

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 4:15 AM EDT	Beach Hazards Statement	BUF	Chautauqua, Monroe, Niagara, Orleans, Wayne	32 hr
Jul 17, 4:42 AM EDT	Special Weather Statement	BUF	Chautauqua	48 min
Jul 17, 6:12 AM EDT	Areal Flood Warning	BUF	Erie, Genesee, Livingston, Monroe, Niagara, Orleans and 1 more	13 hr
Jul 17, 7:39 AM EDT	Special Weather Statement	BUF	Chautauqua	36 min
Jul 17, 7:59 AM EDT	Flash Flood Warning	BUF	Chautauqua	3 hr
Jul 17, 9:11 AM EDT	Areal Flood Warning	BUF	Chautauqua	3 hr
Jul 17, 1:48 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	42 min
Jul 17, 2:10 PM EDT	Areal Flood Warning	BUF	Monroe	40 hr
Jul 17, 3:15 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Erie	6 hr
Jul 17, 3:46 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Erie, Wyoming	44 min
Jul 17, 4:30 PM EDT	Special Weather Statement	BUF	Livingston	45 min
Jul 17, 4:35 PM EDT	River Flood Warning	BUF	Cattaraugus, Chautauqua, Erie, Wyoming	10 hr
Jul 17, 5:15 PM EDT	Areal Flood Warning	BUF	Livingston, Ontario	3 hr
Jul 17, 5:28 PM EDT	Areal Flood Warning	BUF	Allegany, Cattaraugus	5 hr

Nearby

Tornado Warnings in New York, 2021 Every tornado warning in 2021 Tornadoes 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.