Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 62, NWS Buffalo, NY

June 18, 2017Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 18, 2017, 7:36 PM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 54 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, 7:36 PM EDT (23:36 UTC)
Expired: Jun 18, 2017, 8:30 PM EDT
In force: 54 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

The radar

The Buffalo radar (KBUF), 90 km from the middle of the area, began a volume at 23:35 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, 7:40 PM EDT	TSTM WND DMG	2 Se Ellery Center, NY	TREE DOWN ACROSS DUTCH HOLLOW ROAD

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, 11.6 hours before the alert went out and 89 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.

353 
WUUS51 KBUF 182336
SVRBUF
NYC009-013-190030-
/O.NEW.KBUF.SV.W.0062.170618T2336Z-170619T0030Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Western Cattaraugus County in western New York...
  Eastern Chautauqua County in western New York...

* Until 830 PM EDT.

* At 736 PM EDT, severe thunderstorms were located along a line
  extending from Mayville to near Lottsville, 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...
  Jamestown, Salamanca, Allegany State Park, Lakewood, Gowanda,
  Falconer, Long Point State Park and Jamestown West.

This includes Interstate 86 between exits 8 and 20.
 
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 4200 7944 4233 7949 4252 7904 4234 7874
      4200 7874
TIME...MOT...LOC 2336Z 240DEG 34KT 4225 7949 4199 7944 

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

HITCHCOCK

2 follow-up statements

286 
WWUS51 KBUF 190001
SVSBUF

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

NYC009-013-190030-
/O.CON.KBUF.SV.W.0062.000000T0000Z-170619T0030Z/
Cattaraugus NY-Chautauqua NY-
801 PM EDT SUN JUN 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR WESTERN CATTARAUGUS AND EASTERN CHAUTAUQUA COUNTIES...

At 800 PM EDT, severe thunderstorms were located along a line
extending from 7 miles southeast of Fredonia to 10 miles northeast of
Falconer to near Frewsburg, moving northeast at 45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Jamestown, Salamanca, Allegany State Park, Gowanda, Falconer,
Frewsburg, New Albion and Dayton.

This includes Interstate 86 between exits 13 and 20.
 
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 4200 7924 4221 7920 4240 7933 4252 7904
      4234 7874 4200 7874
TIME...MOT...LOC 0000Z 244DEG 38KT 4239 7920 4224 7905 4202 7915 

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

HITCHCOCK

825 
WWUS51 KBUF 190027
SVSBUF

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

NYC009-013-190036-
/O.EXP.KBUF.SV.W.0062.000000T0000Z-170619T0030Z/
Cattaraugus NY-Chautauqua NY-
827 PM EDT SUN JUN 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN CATTARAUGUS AND
EASTERN CHAUTAUQUA COUNTIES WILL EXPIRE AT 830 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 new Severe Thunderstorm Warning still remains in effect 
for portions of Cattaraugus County until 9 PM EDT.

LAT...LON 4200 7924 4221 7920 4240 7933 4252 7904
      4234 7874 4200 7874
TIME...MOT...LOC 0026Z 270DEG 34KT 4251 7893 4236 7878 4214 7888 

$$

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, 4:49 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Wyoming	56 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

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.