Alert archive / New York / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 77, NWS Buffalo, NY

September 17, 2016Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 17, 2016, 5:22 PM EDT for Chautauqua County, New York. It was in force for 38 min. 3 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: Sep 17, 2016, 5:22 PM EDT (21:22 UTC)
Expired: Sep 17, 2016, 6:00 PM EDT
In force: 38 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 80 km from the middle of the area, began a volume at 21:24 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
Sep 17, 5:45 PM EDT	TSTM WND DMG	Westfield, NY	TREES AND POWERLINES DOWN FROM WESTFIELD TO PORTLAND TO SHERIDAN. TIME ESTIMATED.
Sep 17, 5:50 PM EDT	TSTM WND DMG	Portland, NY	TREES AND POWERLINES DOWN FROM WESTFIELD TO PORTLAND TO SHERIDAN. TIME ESTIMATED.
Sep 17, 5:55 PM EDT	TSTM WND DMG	Sheridan, NY	TREES AND POWERLINES DOWN FROM WESTFIELD TO PORTLAND TO SHERIDAN. TIME ESTIMATED.

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, 9.4 hours before the alert went out and 81 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: 48 J/kg
Mixed-layer CIN: -304 J/kg
Mixed-layer LCL: 980 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 226 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

356 
WUUS51 KBUF 172122
SVRBUF
NYC013-172200-
/O.NEW.KBUF.SV.W.0077.160917T2122Z-160917T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
522 PM EDT SAT SEP 17 2016

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CHAUTAUQUA COUNTY IN WESTERN NEW YORK...

* UNTIL 600 PM EDT.

* AT 521 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES WEST OF
  WESTFIELD...OR 22 MILES SOUTHWEST OF FREDONIA...MOVING NORTHEAST AT
  55 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  DUNKIRK...FREDONIA...WESTFIELD...SILVER CREEK...MAYVILLE...SUNY
  FREDONIA...LAKE ERIE STATE PARK AND PORTLAND.

THIS INCLUDES INTERSTATE 90 BETWEEN EXITS 61 AND 58.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4231 7977 4244 7950 4253 7939 4254 7934
      4257 7929 4260 7919 4258 7914 4257 7913
      4257 7911 4254 7906 4241 7906 4216 7973
      4220 7976 4227 7976 4228 7973
TIME...MOT...LOC 2121Z 240DEG 49KT 4228 7971 

HAIL...1.00IN
WIND...60MPH
 
$$

HIBBERT

1 follow-up statement

722 
WWUS51 KBUF 172148
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
548 PM EDT SAT SEP 17 2016

NYC013-172200-
/O.CON.KBUF.SV.W.0077.000000T0000Z-160917T2200Z/
CHAUTAUQUA NY-
548 PM EDT SAT SEP 17 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHERN CHAUTAUQUA COUNTY...

AT 548 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR DUNKIRK TO LAKE ERIE STATE PARK TO NEAR
WESTFIELD...MOVING NORTHEAST AT 45 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
DUNKIRK...FREDONIA...WESTFIELD...SILVER CREEK...SUNY FREDONIA...
LAKE ERIE STATE PARK...PORTLAND AND SHERIDAN.

THIS INCLUDES INTERSTATE 90 BETWEEN EXITS 60 AND 58.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4253 7939 4254 7934 4257 7927 4260 7919
      4258 7914 4257 7913 4257 7911 4254 7908
      4254 7906 4241 7906 4223 7962 4229 7967
TIME...MOT...LOC 2148Z 241DEG 40KT 4254 7931 4241 7941 4226 7962 

HAIL...1.00IN
WIND...60MPH
 
$$

HIBBERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 16, 10:21 PM EDT	Beach Hazards Statement	BUF	Jefferson	25 hr
Sep 17, 4:48 AM EDT	Small Craft Advisory	BUF		26 hr
Sep 17, 11:30 AM EDT	Special Weather Statement	BUF	Chautauqua	45 min
Sep 17, 4:36 PM EDT	Special Marine Warning	BUF		54 min
Sep 17, 5:28 PM EDT	Special Marine Warning	BUF		62 min
Sep 17, 6:00 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	45 min
Sep 17, 6:13 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	47 min
Sep 17, 6:36 PM EDT	Tornado Warning	BUF	Cattaraugus	24 min
Sep 17, 6:37 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans	53 min
Sep 17, 6:42 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Wyoming	48 min
Sep 17, 6:56 PM EDT	Special Marine Warning	BUF		94 min
Sep 17, 7:00 PM EDT	Tornado Warning	BUF	Cattaraugus	30 min
Sep 17, 7:30 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario, Wayne	60 min
Sep 17, 7:50 PM EDT	Special Marine Warning	BUF		55 min

Nearby

Severe Thunderstorm Warnings in New York, 2016 Every severe thunderstorm warning in 2016

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.