Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 114, NWS Buffalo, NY

August 22, 20177 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 22, 2017, 2:48 PM EDT for 7 counties in New York. It was in force for 57 min. 5 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 22, 2017, 2:48 PM EDT (18:48 UTC)
Expired: Aug 22, 2017, 3:45 PM EDT
In force: 57 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 56 km from the middle of the area, began a volume at 18:52 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.

What was reported inside it

Time	Report	Where	Remark
Aug 22, 3:02 PM EDT	TSTM WND DMG	Randolph, NY	TREES DOWN.
Aug 22, 3:09 PM EDT	TSTM WND DMG	Little Valley, NY	TREES DOWN.
Aug 22, 3:15 PM EDT	TSTM WND DMG	Delevan, NY	PIECE OF SIDING BLOWN OFF HOUSE
Aug 22, 3:21 PM EDT	TSTM WND DMG	3 E Ellicottville, NY	TREES DOWN.
Aug 22, 3:33 PM EDT	TSTM WND DMG	1 S Pike, NY	TREE DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 22, 12:23 PM EDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.8 hours before the alert went out and 54 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: 435 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1187 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

893 
WUUS51 KBUF 221848
SVRBUF
NYC003-009-013-029-037-051-121-221945-
/O.NEW.KBUF.SV.W.0114.170822T1848Z-170822T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
248 PM EDT TUE AUG 22 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Wyoming County in western New York...
  Cattaraugus County in western New York...
  Erie County in western New York...
  Northwestern Livingston County in western New York...
  Chautauqua County in western New York...
  Northwestern Allegany County in western New York...
  Southern Genesee County in western New York...

* Until 345 PM EDT.

* At 248 PM EDT, severe thunderstorms were located along a line
  extending from near Bennington to near Columbus, moving east at 25
  mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  West Seneca, Jamestown, Hamburg, Geneseo, East Aurora, Salamanca,
  Allegany State Park and Letchworth State Park.

This includes the following highways...
 Interstate 390 between exits 9 and 10.
 Interstate 90 between exits 58 and 57.
 Interstate 86 between exits 6 and 21.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A tornado watch remains in effect until 900 PM EDT for western New
York.

LAT...LON 4288 7868 4294 7760 4200 7878 4200 7976
      4206 7976
TIME...MOT...LOC 1848Z 267DEG 24KT 4282 7846 4196 7952 

HAIL...<.75IN
WIND...60MPH
 
$$

Mitchell

3 follow-up statements

197 
WWUS51 KBUF 221909
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
309 PM EDT TUE AUG 22 2017

NYC003-009-013-029-037-051-121-221945-
/O.CON.KBUF.SV.W.0114.000000T0000Z-170822T1945Z/
Wyoming NY-Cattaraugus NY-Erie NY-Livingston NY-Chautauqua NY-
Allegany NY-Genesee NY-
309 PM EDT TUE AUG 22 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR WYOMING...CATTARAUGUS...SOUTHEASTERN ERIE...NORTHWESTERN
LIVINGSTON...SOUTHEASTERN CHAUTAUQUA...NORTHWESTERN ALLEGANY AND
SOUTHEASTERN GENESEE COUNTIES...

At 309 PM EDT, severe thunderstorms were located along a line
extending from near Attica to near Lottsville, moving east at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Jamestown, Geneseo, Salamanca, Letchworth State Park, Allegany State
Park, Springville, Perry and Warsaw.

This includes the following highways...
 Interstate 390 between exits 9 and 10.
 Interstate 86 between exits 11 and 21.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A tornado watch remains in effect until 900 PM EDT for western New
York.

LAT...LON 4294 7760 4200 7878 4200 7961 4230 7905
      4290 7827
TIME...MOT...LOC 1909Z 267DEG 24KT 4283 7828 4197 7935 

HAIL...<.75IN
WIND...60MPH
 
$$

Mitchell

581 
WWUS51 KBUF 221924
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
324 PM EDT TUE AUG 22 2017

NYC003-009-013-029-037-051-121-221945-
/O.CON.KBUF.SV.W.0114.000000T0000Z-170822T1945Z/
Wyoming NY-Cattaraugus NY-Erie NY-Livingston NY-Chautauqua NY-
Allegany NY-Genesee NY-
324 PM EDT TUE AUG 22 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR WYOMING...CENTRAL CATTARAUGUS...SOUTHEASTERN ERIE...NORTHWESTERN
LIVINGSTON...SOUTHEASTERN CHAUTAUQUA...NORTHWESTERN ALLEGANY AND
SOUTHEASTERN GENESEE COUNTIES...

At 324 PM EDT, severe thunderstorms were located along a line
extending from near Warsaw to near Scandia, moving east at 50 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Jamestown, Geneseo, Salamanca, Letchworth State Park, Allegany State
Park, Perry, Warsaw and Avon.

This includes the following highways...
 Interstate 390 between exits 9 and 10.
 Interstate 86 between exits 14 and 21.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

A tornado watch remains in effect until 900 PM EDT for western New
York.

LAT...LON 4294 7760 4200 7878 4201 7942 4231 7880
      4290 7811
TIME...MOT...LOC 1924Z 277DEG 42KT 4279 7808 4195 7905 

HAIL...<.75IN
WIND...60MPH
 
$$

Apffel

714 
WWUS51 KBUF 221946
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
346 PM EDT TUE AUG 22 2017

NYC003-009-013-029-037-051-121-221955-
/O.EXP.KBUF.SV.W.0114.000000T0000Z-170822T1945Z/
Wyoming NY-Cattaraugus NY-Erie NY-Livingston NY-Chautauqua NY-
Allegany NY-Genesee NY-
346 PM EDT TUE AUG 22 2017

...THE SEVERE THUNDERSTORM WARNING FOR WYOMING...CENTRAL
CATTARAUGUS...SOUTHEASTERN ERIE...NORTHWESTERN LIVINGSTON...
SOUTHEASTERN CHAUTAUQUA...NORTHWESTERN ALLEGANY AND SOUTHEASTERN
GENESEE COUNTIES HAS EXPIRED...

The storms which prompted the warning have been replaced by another 
warning. Therefore, the warning has been allowed to expire.

A tornado watch remains in effect until 900 PM EDT for western New
York.

LAT...LON 4294 7760 4200 7878 4201 7942 4231 7880
      4290 7811
TIME...MOT...LOC 1945Z 267DEG 24KT 4280 7789 4196 7887 

$$

Apffel

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 10:39 PM EDT	Beach Hazards Statement	BUF	Chautauqua, Erie, Jefferson	23 hr
Aug 22, 4:04 AM EDT	Wind Advisory	BUF	Erie, Genesee, Niagara, Orleans	13 hr
Aug 22, 4:09 AM EDT	Lakeshore Flood Warning	BUF	Cayuga, Jefferson, Oswego, Wayne	40 hr
Aug 22, 7:16 AM EDT	Special Weather Statement	BUF	Lewis	59 min
Aug 22, 9:51 AM EDT	Special Marine Warning	BUF		54 min
Aug 22, 12:05 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	55 min
Aug 22, 12:34 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans, Wayne and 1 more	56 min
Aug 22, 12:34 PM EDT	Tornado Warning	BUF	Cattaraugus, Chautauqua	26 min
Aug 22, 12:42 PM EDT	Special Marine Warning	BUF		48 min
Aug 22, 12:44 PM EDT	Special Marine Warning	BUF		61 min
Aug 22, 12:55 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Erie, Genesee, Livingston, Wyoming	65 min
Aug 22, 1:13 PM EDT	Special Marine Warning	BUF		62 min
Aug 22, 1:23 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Monroe, Ontario, Oswego, Wayne	67 min
Aug 22, 1:27 PM EDT	Special Marine Warning	BUF		63 min
Aug 22, 1:42 PM EDT	Special Marine Warning	BUF		63 min
Aug 22, 1:53 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	67 min
Aug 22, 1:56 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Ontario, Wyoming	49 min
Aug 22, 2:05 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Lewis, Oswego	55 min
Aug 22, 2:12 PM EDT	Tornado Warning	BUF	Allegany, Livingston	33 min
Aug 22, 2:47 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	58 min
Aug 22, 3:11 PM EDT	Tornado Warning	BUF	Lewis	34 min
Aug 22, 3:15 PM EDT	Tornado Warning	BUF	Lewis	30 min
Aug 22, 3:20 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Livingston, Wyoming	55 min
Aug 22, 3:45 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wyoming	45 min
Aug 22, 4:28 PM EDT	Special Marine Warning	BUF		92 min
Aug 22, 4:29 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	19 min
Aug 22, 4:40 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	35 min
Aug 22, 4:53 PM EDT	Special Weather Statement	BUF	Jefferson	67 min
Aug 22, 5:10 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	35 min
Aug 22, 5:28 PM EDT	Special Marine Warning	BUF		47 min
Aug 22, 5:29 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	61 min
Aug 22, 6:28 PM EDT	Special Marine Warning	BUF		32 min
Aug 22, 6:28 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	47 min
Aug 22, 7:00 PM EDT	Special Marine Warning	BUF		30 min
Aug 22, 7:13 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans, Wyoming	22 min

Nearby

Severe Thunderstorm Warnings in New York, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.