Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 14, NWS Buffalo, NY

May 23, 2011Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 23, 2011, 8:23 PM EDT for Chautauqua County, New York. It was in force for 37 min. 4 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: May 23, 2011, 8:23 PM EDT (00:23 UTC)
Expired: May 23, 2011, 9:00 PM EDT
In force: 37 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 114 km from the middle of the area, began a volume at 00:23 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
May 23, 8:43 PM EDT	TSTM WND DMG	Findley Lake, NY	MULTIPLE TREES AND POWER LINES DOWN
May 23, 8:48 PM EDT	TSTM WND DMG	Clymer, NY	MULTIPLE TREES AND POWER LINES DOWN
May 23, 9:00 PM EDT	TSTM WND DMG	Panama, NY	MULTIPLE TREES ABD POWER LINES DOWN
May 23, 9:08 PM EDT	TSTM WND DMG	Busti, NY	MULTIPLE TREES AND POWER LINES DOWN

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 00:00Z, 0.4 hours before the alert went out and 114 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: 191 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1252 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 172 m²/s²
0-3 km storm-relative helicity: 226 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

884 
WUUS51 KBUF 240023
SVRBUF
NYC013-240100-
/O.NEW.KBUF.SV.W.0014.110524T0023Z-110524T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
823 PM EDT MON MAY 23 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 900 PM EDT

* AT 818 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF FINDLEY 
  LAKE TO 22 MILES SOUTHWEST OF FINDLEY LAKE...AND MOVING EAST AT 35 
  MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  FINDLEY LAKE...
  CHAUTAUQUA INSTITUTE...
  LAKEWOOD...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THE PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THESE STORMS HAVE A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4223 7977 4227 7907 4201 7908 4199 7922
      4199 7958 4199 7976 4200 7977
TIME...MOT...LOC 0022Z 266DEG 30KT 4217 7978 4196 8002

$$

HIBBERT

2 follow-up statements

559 
WWUS51 KBUF 240045
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
845 PM EDT MON MAY 23 2011

NYC013-240100-
/O.CON.KBUF.SV.W.0014.000000T0000Z-110524T0100Z/
CHAUTAUQUA NY-
845 PM EDT MON MAY 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR SOUTHERN CHAUTAUQUA COUNTY...

AT 843 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM SHERMAN TO 8 MILES SOUTHWEST
OF FRENCH CREEK....MOVING EAST AT 35 MPH. SOME OF THE STRONGEST 
EFFECT FROM THESE STORMS WILL BE OVER THE SOUTHWESTERN CORNER OF THE 
COUNTY...NEAR FRENCH CREEK AND CLYMER.

SOME LOCATIONS IN THE WARNING INCLUDE...
  CHAUTAUQUA INSTITUTE...
  GERRY...
  FRENCH CREEK...
  CLYMER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THE PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THESE STORMS HAVE A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE
DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4223 7977 4227 7907 4201 7908 4199 7922
      4199 7958 4199 7976 4200 7977
TIME...MOT...LOC 0044Z 266DEG 30KT 4218 7952 4197 7976

$$

HIBBERT

411 
WWUS51 KBUF 240058
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
858 PM EDT MON MAY 23 2011

NYC013-240108-
/O.EXP.KBUF.SV.W.0014.000000T0000Z-110524T0100Z/
CHAUTAUQUA NY-
858 PM EDT MON MAY 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CHAUTAUQUA COUNTY 
HAS BEEN REPLACED BY A TORNADO WARNING...

LAT...LON 4223 7977 4227 7907 4201 7908 4199 7922
      4199 7958 4199 7976 4200 7977
TIME...MOT...LOC 0058Z 266DEG 30KT 4219 7936 4198 7960

$$

RSH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 8:45 PM EDT	Special Marine Warning	BUF		30 min
May 23, 8:54 PM EDT	Tornado Warning	BUF	Chautauqua	36 min
May 23, 9:14 PM EDT	Severe Thunderstorm Warning	BUF	Erie	17 min
May 23, 9:24 PM EDT	Flash Flood Warning	BUF	Chautauqua	3 hr
May 23, 9:59 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua	3 hr
May 23, 10:05 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	25 min
May 23, 10:30 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	45 min
May 23, 10:56 PM EDT	Areal Flood Advisory	BUF	Cattaraugus, Chautauqua, Erie, Wyoming	3 hr
May 23, 11:09 PM EDT	Flash Flood Warning	BUF	Allegany, Cattaraugus, Wyoming	3 hr
May 23, 11:13 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	17 min
May 24, 9:27 AM EDT	Small Craft Advisory	BUF		4 hr

Nearby

Severe Thunderstorm Warnings in New York, 2011 Every severe thunderstorm warning in 2011

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.