Alert archive / New York / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 46, NWS Buffalo, NY

June 18, 2017Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 18, 2017, 2:23 PM EDT for Chautauqua County, New York. It was in force for 37 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, 2:23 PM EDT (18:23 UTC)
Expired: Jun 18, 2017, 3:00 PM EDT
In force: 37 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 101 km from the middle of the area, began a volume at 18:22 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, 2:30 PM EDT	TSTM WND DMG	2 Ne Panama, NY	TREES 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
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, 6.4 hours before the alert went out and 101 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.

413 
WUUS51 KBUF 181823
SVRBUF
NYC013-181900-
/O.NEW.KBUF.SV.W.0046.170618T1823Z-170618T1900Z/

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

The National Weather Service in Buffalo has issued a

* Severe Thunderstorm Warning for...
  Southern Chautauqua County in western New York...

* Until 300 PM EDT.

* At 221 PM EDT, a severe thunderstorm was located 7 miles south of
  Chautauqua Institute, or 14 miles west of Jamestown, moving
  northeast at 35 mph.

  HAZARD...60 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Jamestown, Lakewood, Falconer, Mayville, Long Point State Park,
  Chautauqua Institute, Jamestown West and Frewsburg.

This includes Interstate 86 between exits 6 and 14.
 
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 4204 7958 4218 7964 4238 7921 4228 7909
      4207 7909
TIME...MOT...LOC 1821Z 245DEG 29KT 4211 7952 

HAIL...0.75IN
WIND...60MPH
 
$$

HITCHCOCK

2 follow-up statements

244 
WWUS51 KBUF 181842
SVSBUF

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

NYC013-181900-
/O.CON.KBUF.SV.W.0046.000000T0000Z-170618T1900Z/
Chautauqua NY-
242 PM EDT SUN JUN 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR SOUTHEASTERN CHAUTAUQUA COUNTY...

At 242 PM EDT, a severe thunderstorm was located near Long Point
State Park, or 9 miles northwest of Jamestown, 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...
Jamestown, Lakewood, Falconer, Jamestown West, Long Point State Park,
Frewsburg, Gerry and Ellington.

This includes Interstate 86 between exits 8 and 14.
 
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 4205 7941 4228 7941 4238 7921 4228 7909
      4207 7909
TIME...MOT...LOC 1842Z 242DEG 32KT 4222 7931 

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

HITCHCOCK

133 
WWUS51 KBUF 181858
SVSBUF

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

NYC013-181907-
/O.EXP.KBUF.SV.W.0046.000000T0000Z-170618T1900Z/
Chautauqua NY-
258 PM EDT SUN JUN 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CHAUTAUQUA COUNTY
WILL EXPIRE AT 300 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned 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
western Chautauqua County.

LAT...LON 4205 7941 4228 7941 4238 7921 4228 7909
      4207 7909
TIME...MOT...LOC 1857Z 245DEG 29KT 4227 7916 

$$

Wood

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, 2:24 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
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.