Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 52, NWS Buffalo, NY

June 18, 2017Livingston County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 18, 2017, 4:49 PM EDT for Livingston County, Wyoming County, New York. It was in force for 56 min. 1 report 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: Jun 18, 2017, 4:49 PM EDT (20:49 UTC)
Expired: Jun 18, 2017, 5:45 PM EDT
In force: 56 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 74 km from the middle of the area, began a volume at 20:50 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
Jun 18, 5:24 PM EDT	TSTM WND DMG	Geneseo, NY	WIRES DOWN ON EAGLE POINT RD.

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
Jun 18, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.8 hours before the alert went out and 70 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: 199 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1297 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

328 
WUUS51 KBUF 182049
SVRBUF
NYC051-121-182145-
/O.NEW.KBUF.SV.W.0052.170618T2049Z-170618T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Buffalo NY
449 PM EDT SUN JUN 18 2017

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wyoming County in western New York...
  Livingston County in western New York...

* Until 545 PM EDT.

* At 449 PM EDT, a severe thunderstorm was located 8 miles north of
  Houghton, or 13 miles southwest of Letchworth State Park, moving
  northeast at 35 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Geneseo, Dansville, Letchworth State Park, Perry, Warsaw, Avon,
  Mount Morris and Conesus.

This includes Interstate 390 between exits 5 and 10.
 
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 4266 7832 4294 7764 4258 7759 4258 7766
      4256 7766 4252 7812 4252 7824
TIME...MOT...LOC 2049Z 242DEG 30KT 4254 7820 

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

HITCHCOCK

2 follow-up statements

075 
WWUS51 KBUF 182112
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
512 PM EDT SUN JUN 18 2017

NYC051-121-182145-
/O.CON.KBUF.SV.W.0052.000000T0000Z-170618T2145Z/
Wyoming NY-Livingston NY-
512 PM EDT SUN JUN 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN WYOMING AND LIVINGSTON COUNTIES...

At 512 PM EDT, severe thunderstorms were located along a line
extending from near Geneseo to 7 miles east of Portageville, moving
northeast at 40 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Geneseo, Dansville, Letchworth State Park, Perry, Warsaw, Avon, Mount
Morris and Conesus.

This includes Interstate 390 between exits 5 and 10.
 
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.

&&

LAT...LON 4294 7764 4258 7759 4258 7766 4256 7766
      4252 7814 4252 7824 4255 7826 4269 7825
TIME...MOT...LOC 2112Z 239DEG 37KT 4280 7790 4254 7790 

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

HITCHCOCK

532 
WWUS51 KBUF 182144
SVSBUF

Severe Weather Statement
National Weather Service Buffalo NY
544 PM EDT SUN JUN 18 2017

NYC051-121-182152-
/O.EXP.KBUF.SV.W.0052.000000T0000Z-170618T2145Z/
Wyoming NY-Livingston NY-
544 PM EDT SUN JUN 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WYOMING AND
LIVINGSTON COUNTIES WILL EXPIRE AT 545 PM EDT...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning will be allowed to expire.

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

Remember, a Severe Thunderstorm Warning still remains in effect for
portions of Livingston County.

LAT...LON 4294 7764 4258 7759 4258 7766 4256 7766
      4252 7814 4252 7824 4255 7826 4269 7825
TIME...MOT...LOC 2142Z 242DEG 30KT 4292 7760 4266 7761 

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 10:50 PM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Jefferson and 7 more	22 hr
Jun 18, 2:07 PM EDT	Special Weather Statement	BUF	Chautauqua	38 min
Jun 18, 2:14 PM EDT	Special Marine Warning	BUF		61 min
Jun 18, 2:23 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	37 min
Jun 18, 2:24 PM EDT	Special Marine Warning	BUF		66 min
Jun 18, 2:37 PM EDT	Special Weather Statement	BUF	Wayne	53 min
Jun 18, 2:41 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	49 min
Jun 18, 3:04 PM EDT	Special Marine Warning	BUF		86 min
Jun 18, 3:27 PM EDT	Special Marine Warning	BUF		63 min
Jun 18, 3:45 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	60 min
Jun 18, 3:53 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Erie, Wyoming	67 min
Jun 18, 4:05 PM EDT	Special Weather Statement	BUF	Oswego	40 min
Jun 18, 4:29 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Orleans	31 min
Jun 18, 4:40 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	65 min
Jun 18, 4:53 PM EDT	Special Weather Statement	BUF	Lewis	67 min
Jun 18, 4:54 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Wyoming	51 min
Jun 18, 5:14 PM EDT	Special Weather Statement	BUF	Lewis	61 min
Jun 18, 5:16 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	59 min
Jun 18, 5:19 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	56 min
Jun 18, 5:21 PM EDT	Special Marine Warning	BUF		54 min
Jun 18, 5:28 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Wyoming	47 min
Jun 18, 5:46 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	59 min
Jun 18, 6:01 PM EDT	Special Marine Warning	BUF		59 min
Jun 18, 6:11 PM EDT	Severe Thunderstorm Warning	BUF	Ontario, Wayne	49 min
Jun 18, 6:30 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	45 min
Jun 18, 6:41 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	64 min
Jun 18, 6:44 PM EDT	Special Marine Warning	BUF		61 min
Jun 18, 7:02 PM EDT	Special Marine Warning	BUF		28 min
Jun 18, 7:13 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	62 min
Jun 18, 7:36 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	54 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.