Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 132, NWS Buffalo, NY

October 15, 20178 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Oct 15, 2017, 3:56 PM EDT for 8 counties in New York. It was in force for 49 min. 16 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: Oct 15, 2017, 3:56 PM EDT (19:56 UTC)
Expired: Oct 15, 2017, 4:45 PM EDT
In force: 49 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Monroe County, NY, Niagara County, NY, Orleans County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 31 km from the middle of the area, began a volume at 19:56 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
Oct 15, 3:56 PM EDT	TSTM WND DMG	3 Nnw Orchard Park, NY	LARGE BRANCH BLOWN DOWN ON MINDEN DRIVE.
Oct 15, 3:58 PM EDT	TSTM WND DMG	1 S Arkwright, NY	TREE DOWN PARTIALLY BLOCKING THE ROAD.
Oct 15, 4:05 PM EDT	TSTM WND DMG	Ene East Aurora, NY	LARGE TREE DOWN.
Oct 15, 4:08 PM EDT	TSTM WND DMG	1 Nne Sinclairville, NY	TREE FELL ON A HOUSE.
Oct 15, 4:10 PM EDT	TSTM WND DMG	Gowanda, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 4:12 PM EDT	TSTM WND DMG	South Dayton, NY	TREES AND WIRES DOWN.
Oct 15, 4:16 PM EDT	TSTM WND DMG	Oakfield, NY	TREE DOWN.
Oct 15, 4:16 PM EDT	TSTM WND DMG	Strykersville, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 4:18 PM EDT	TSTM WND DMG	Attica, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 4:23 PM EDT	TSTM WND DMG	Byron, NY	TREE DOWN.
Oct 15, 4:30 PM EDT	TSTM WND DMG	Byron, NY	TREE DOWN.
Oct 15, 4:30 PM EDT	TSTM WND DMG	Cattaraugus, NY	TREES AND WIRES DOWN.
Oct 15, 4:36 PM EDT	TSTM WND DMG	Delevan, NY	TREES AND WIRES DOWN.
Oct 15, 4:40 PM EDT	TSTM WND DMG	Arcade, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 4:40 PM EDT	TSTM WND DMG	Arcade, NY	COMMERCIAL BUILDING SIGN BLOWN DOWN.
Oct 15, 4:44 PM EDT	TSTM WND DMG	Warsaw, NY	MULTIPLE TREES AND WIRES DOWN.

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.9 hours before the alert went out and 28 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: 18 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 309 m²/s²
0-3 km storm-relative helicity: 376 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

149 
WUUS51 KBUF 151956
SVRBUF
NYC009-013-029-037-055-063-073-121-152045-
/O.NEW.KBUF.SV.W.0132.171015T1956Z-171015T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
356 PM EDT SUN OCT 15 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Wyoming County in western New York...
  Northern Cattaraugus County in western New York...
  Erie County in western New York...
  Southeastern Niagara County in western New York...
  Orleans County in western New York...
  Northeastern Chautauqua County in western New York...
  Northwestern Monroe County in western New York...
  Genesee County in western New York...

* Until 445 PM EDT.

* At 356 PM EDT, severe thunderstorms were located along a line
  extending from near Lakeside Beach State Park to North Collins to 8
  miles south of Fredonia, moving southeast at 45 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Buffalo, Cheektowaga, West Seneca, Clarence, Lackawanna, Batavia,
  Depew and Lancaster.

This includes Interstate 90 between exits 58 and 47.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4229 7945 4263 7902 4342 7839 4341 7796
      4335 7770 4252 7827 4252 7831 4246 7831
      4219 7849
TIME...MOT...LOC 1956Z 297DEG 37KT 4345 7825 4259 7893 4232 7931 

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

Mitchell

2 follow-up statements

317 
WWUS51 KBUF 152021
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
421 PM EDT SUN OCT 15 2017

NYC063-152029-
/O.CAN.KBUF.SV.W.0132.000000T0000Z-171015T2045Z/
Niagara NY-
421 PM EDT SUN OCT 15 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NIAGARA COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4228 7926 4247 7895 4267 7877 4273 7856
      4341 7806 4341 7796 4335 7770 4252 7827
      4252 7831 4246 7831 4219 7849
TIME...MOT...LOC 2019Z 254DEG 52KT 4340 7808 4271 7849 4242 7889 

$$

NYC009-013-029-037-055-073-121-152045-
/O.CON.KBUF.SV.W.0132.000000T0000Z-171015T2045Z/
Wyoming NY-Cattaraugus NY-Erie NY-Orleans NY-Chautauqua NY-Monroe NY-
Genesee NY-
421 PM EDT SUN OCT 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR WYOMING...NORTHERN CATTARAUGUS...SOUTHEASTERN ERIE...EASTERN
ORLEANS...EAST CENTRAL CHAUTAUQUA...NORTHWESTERN MONROE AND GENESEE
COUNTIES...

At 419 PM EDT, severe thunderstorms were located along a line
extending from near Point Breeze to near Wales Center to near
Gowanda, moving east at 60 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Batavia, Brockport, Albion, Hilton, Darien Lakes State Park, Hamlin
Beach State Park, Boston and Le Roy.

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.

These storms have a history of producing destructive winds. SEEK 
SHELTER NOW inside a sturdy structure and stay away from windows.
 
&&

LAT...LON 4228 7926 4247 7895 4267 7877 4273 7856
      4341 7806 4341 7796 4335 7770 4252 7827
      4252 7831 4246 7831 4219 7849
TIME...MOT...LOC 2019Z 254DEG 52KT 4340 7808 4271 7849 4242 7889 

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

Mitchell

901 
WWUS51 KBUF 152042
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
442 PM EDT SUN OCT 15 2017

NYC009-013-029-037-055-073-121-152050-
/O.EXP.KBUF.SV.W.0132.000000T0000Z-171015T2045Z/
Wyoming NY-Cattaraugus NY-Erie NY-Orleans NY-Chautauqua NY-Monroe NY-
Genesee NY-
442 PM EDT SUN OCT 15 2017

...THE SEVERE THUNDERSTORM WARNING FOR WYOMING...NORTHERN
CATTARAUGUS...SOUTHEASTERN ERIE...EASTERN ORLEANS...EAST CENTRAL
CHAUTAUQUA...NORTHWESTERN MONROE AND GENESEE COUNTIES WILL EXPIRE AT
445 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning will be allowed to expire.

LAT...LON 4228 7926 4247 7895 4267 7877 4273 7856
      4341 7806 4341 7796 4335 7770 4252 7827
      4252 7831 4246 7831 4219 7849
TIME...MOT...LOC 2040Z 297DEG 37KT 4331 7784 4262 7825 4233 7865 

$$

Apffel

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 15, 3:09 PM EDT	Special Marine Warning	BUF		111 min
Oct 15, 3:20 PM EDT	Special Marine Warning	BUF		85 min
Oct 15, 3:37 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara	23 min
Oct 15, 4:36 PM EDT	Special Marine Warning	BUF		114 min
Oct 15, 4:36 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Genesee, Livingston, Monroe, Ontario and 2 more	39 min
Oct 15, 4:57 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua	63 min
Oct 15, 5:15 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Livingston, Ontario	45 min
Oct 15, 5:16 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Oswego, Wayne	44 min
Oct 15, 5:56 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	64 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.