Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 133, NWS Buffalo, NY

October 15, 20178 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Oct 15, 2017, 4:36 PM EDT for 8 counties in New York. It was in force for 39 min. 42 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, 4:36 PM EDT (20:36 UTC)
Expired: Oct 15, 2017, 5:15 PM EDT
In force: 39 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, Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Wayne County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 97 km from the middle of the area, began a volume at 20:38 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, 4:36 PM EDT	TSTM WND DMG	Delevan, NY	TREES AND WIRES DOWN.
Oct 15, 4:40 PM EDT	TSTM WND DMG	1 Sw York, NY	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.
Oct 15, 4:49 PM EDT	TSTM WND DMG	3 W Brighton, NY	WIRES REPORTED DOWN NEAR GENESEE STREET AND VIXETTE STREET
Oct 15, 4:50 PM EDT	TSTM WND GST 63	Rochester Airport, NY
Oct 15, 4:51 PM EDT	TSTM WND DMG	2 N Brighton, NY	WIRES REPORTED DOWN ON WILCOX STREE
Oct 15, 4:51 PM EDT	TSTM WND DMG	2 N Brighton, NY	WIRES REPORTED DOWN ON WILCOX STREET
Oct 15, 4:51 PM EDT	TSTM WND DMG	2 Sw Rochester, NY	WIRES REPORTED DOWN ON WEST AVE
Oct 15, 4:52 PM EDT	TSTM WND DMG	Gainesville, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 4:53 PM EDT	TSTM WND DMG	2 Ene Rochester, NY	WIRES REPORTED DOWN ON CROMBIE STREET
Oct 15, 4:53 PM EDT	TSTM WND DMG	2 S Irondequoit, NY
Oct 15, 4:54 PM EDT	TSTM WND DMG	Perry, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 4:54 PM EDT	TSTM WND DMG	Webster, NY	LARGE TREE DOWN.
Oct 15, 4:55 PM EDT	TSTM WND DMG	Avon, NY	TREE DOWN ON HOUSE.
Oct 15, 4:57 PM EDT	TSTM WND DMG	Leicester, NY	WIRES DOWN.
Oct 15, 4:58 PM EDT	TSTM WND DMG	Castile, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 5:00 PM EDT	TSTM WND DMG	1 Ssw Webster, NY	WIRES REPORTED DOWN ON GOLDEN ROD LANE
Oct 15, 5:00 PM EDT	TSTM WND DMG	1 Ssw Webster, NY	WIRES REPORTED DOWN ON MEADOW DRIVE
Oct 15, 5:00 PM EDT	TSTM WND DMG	3 S Pittsford, NY	WIRES REPORTED DOWN ON THORNELL RD
Oct 15, 5:00 PM EDT	TSTM WND DMG	Farmersville Station, NY	TREES AND WIRES DOWN.
Oct 15, 5:02 PM EDT	TSTM WND DMG	Victor, NY	TREE AND WIRES DOWN.
Oct 15, 5:03 PM EDT	TSTM WND DMG	1 Ese Pittsford, NY	WIRES REPORTED DOWN NEAR MITCHELL RD/RT 31
Oct 15, 5:05 PM EDT	TSTM WND DMG	1 Wsw Fairport, NY	WIRES REPORTED DOWN ON CRYSTAL SPRING LANE
Oct 15, 5:05 PM EDT	TSTM WND DMG	Mount Morris, NY	TREE AND WIRE DOWN.
Oct 15, 5:06 PM EDT	TSTM WND DMG	Fairport, NY	TREE BLOWN DOWN ONTO A HOUSE AND CAR.
Oct 15, 5:06 PM EDT	TSTM WND DMG	Livonia, NY	TREES DOWN.
Oct 15, 5:06 PM EDT	TSTM WND DMG	Victor, NY	TREE DOWN ON HOUSE.
Oct 15, 5:08 PM EDT	TSTM WND DMG	1 W Fillmore, NY	TREES AND WIRES DOWN.
Oct 15, 5:10 PM EDT	TSTM WND DMG	1 Se Ontario, NY	MULTIPLE REPORTS OF TREES AND WIRES DOWN.
Oct 15, 5:12 PM EDT	TSTM WND DMG	Farmington, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 5:15 PM EDT	TSTM WND DMG	1 E Walworth, NY	MULTIPLE REPORTS OF TREES AND WIRES DOWN.
Oct 15, 5:20 PM EDT	TSTM WND DMG	Manchester, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 5:20 PM EDT	TSTM WND GST 60	4 Nnw Clifton Springs, NY
Oct 15, 5:23 PM EDT	TSTM WND DMG	Newark, NY	LARGE TREE BLOWN DOWN ONTO POWER LINES.
Oct 15, 5:24 PM EDT	TSTM WND DMG	Canadice, NY	TREE DOWN.
Oct 15, 5:24 PM EDT	TSTM WND DMG	Dansville, NY	MULTIPLE TREES AND WIRES DOWN.
Oct 15, 5:24 PM EDT	TSTM WND DMG	Dansville, NY	TREE DOWN ON HOUSE... HARTMAN RD.
Oct 15, 5:24 PM EDT	TSTM WND DMG	Shortsville, NY	TREE DOWN.
Oct 15, 5:25 PM EDT	TSTM WND DMG	1 S Short Tract, NY	TREE AND WIRE DOWN.
Oct 15, 5:25 PM EDT	TSTM WND DMG	Dansville, NY	TREE ON HOUSE... MOREY AVE.

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, 8.6 hours before the alert went out and 94 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.

723 
WUUS51 KBUF 152036
SVRBUF
NYC003-009-037-051-055-069-117-121-152115-
/O.NEW.KBUF.SV.W.0133.171015T2036Z-171015T2115Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Wayne County in western New York...
  Wyoming County in western New York...
  Northeastern Cattaraugus County in western New York...
  Livingston County in western New York...
  Northern Allegany County in western New York...
  Monroe County in western New York...
  Southeastern Genesee County in western New York...
  Ontario County in western New York...

* Until 515 PM EDT.

* At 432 PM EDT, severe thunderstorms were located along a line
  extending from near Hilton to near Pavilion to Ashford Hollow,
  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...
  Rochester, Greece, Irondequoit, Chili, Canandaigua, Geneseo, East
  Rochester and Webster.

This includes the following highways...
 Interstate 390 between exits 4 and 12.
 Interstate 90 between exits 47 and 43.

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 wind damage. SEEK SHELTER 
NOW inside a sturdy structure and stay away from windows!

&&

LAT...LON 4235 7868 4287 7809 4336 7771 4328 7754
      4333 7717 4331 7697 4335 7681 4347 7659
      4276 7720 4276 7732 4267 7737 4258 7737
      4258 7766 4253 7766 4253 7772 4234 7773
      4231 7778
TIME...MOT...LOC 2032Z 267DEG 45KT 4334 7774 4291 7811 4242 7868 

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

Mitchell

2 follow-up statements

569 
WWUS51 KBUF 152057
SVSBUF

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

NYC037-152106-
/O.CAN.KBUF.SV.W.0133.000000T0000Z-171015T2115Z/
Genesee NY-
457 PM EDT SUN OCT 15 2017

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

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

LAT...LON 4236 7858 4284 7798 4328 7752 4333 7717
      4331 7697 4335 7681 4347 7659 4276 7720
      4276 7732 4258 7737 4258 7766 4253 7766
      4253 7772 4234 7773 4231 7778
TIME...MOT...LOC 2056Z 267DEG 45KT 4335 7735 4292 7772 4244 7830 

$$

NYC003-009-051-055-069-117-121-152115-
/O.CON.KBUF.SV.W.0133.000000T0000Z-171015T2115Z/
Wayne NY-Wyoming NY-Cattaraugus NY-Livingston NY-Allegany NY-
Monroe NY-Ontario NY-
457 PM EDT SUN OCT 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WAYNE...SOUTHEASTERN WYOMING...NORTHEASTERN CATTARAUGUS...
LIVINGSTON...NORTHERN ALLEGANY...SOUTHEASTERN MONROE AND ONTARIO
COUNTIES...

At 456 PM EDT, severe thunderstorms were located along a line
extending from 9 miles north of Ontario to Avon to near Rushford,
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...
Rochester, Irondequoit, Canandaigua, Geneseo, East Rochester,
Webster, Fairport and Dansville.

This includes the following highways...
 Interstate 390 between exits 4 and 12.
 Interstate 90 between exits 46 and 43.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4236 7858 4284 7798 4328 7752 4333 7717
      4331 7697 4335 7681 4347 7659 4276 7720
      4276 7732 4258 7737 4258 7766 4253 7766
      4253 7772 4234 7773 4231 7778
TIME...MOT...LOC 2056Z 267DEG 45KT 4335 7735 4292 7772 4244 7830 

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

Apffel

017 
WWUS51 KBUF 152117
SVSBUF

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

NYC003-009-051-055-069-117-121-152126-
/O.EXP.KBUF.SV.W.0133.000000T0000Z-171015T2115Z/
Wayne NY-Wyoming NY-Cattaraugus NY-Livingston NY-Allegany NY-
Monroe NY-Ontario NY-
517 PM EDT SUN OCT 15 2017

...THE SEVERE THUNDERSTORM WARNING FOR WAYNE...SOUTHEASTERN
WYOMING...NORTHEASTERN CATTARAUGUS...LIVINGSTON...NORTHERN
ALLEGANY...SOUTHEASTERN MONROE AND ONTARIO COUNTIES HAS EXPIRED...

The storms which prompted the warning have been moved out of the 
warned area or been replaced by another warning.

LAT...LON 4236 7858 4284 7798 4328 7752 4333 7717
      4331 7697 4335 7681 4347 7659 4276 7720
      4276 7732 4258 7737 4258 7766 4253 7766
      4253 7772 4234 7773 4231 7778
TIME...MOT...LOC 2116Z 267DEG 45KT 4336 7701 4293 7738 4245 7796 

$$

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, 3:56 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie, Genesee, Monroe, Niagara and 2 more	49 min
Oct 15, 4:36 PM EDT	Special Marine Warning	BUF		114 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.