Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 89, NWS Buffalo, NY

September 4, 2011Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 4, 2011, 3:21 AM EDT for Chautauqua County, New York. It was in force for 54 min. 2 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 4, 2011, 3:21 AM EDT (07:21 UTC)
Expired: Sep 4, 2011, 4:15 AM EDT
In force: 54 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 88 km from the middle of the area, began a volume at 07:22 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
Sep 4, 3:40 AM EDT	MARINE TSTM WIND 56	Barcelona, NY
Sep 4, 3:54 AM EDT	MARINE TSTM WIND 52	Dunkirk, NY

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, 7.4 hours before the alert went out and 88 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: 889 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1459 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

154 
WUUS51 KBUF 040721
SVRBUF
NYC013-040815-
/O.NEW.KBUF.SV.W.0089.110904T0721Z-110904T0815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
321 AM EDT SUN SEP 4 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 415 AM EDT

* AT 318 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 13
  MILES NORTHWEST OF FINDLEY LAKE...OR 31 MILES SOUTHWEST OF
  FREDONIA...AND MOVING NORTHEAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  WESTFIELD...
  DUNKIRK...
  SILVER CREEK...

LAT...LON 4229 7974 4242 7946 4250 7935 4257 7914
      4253 7907 4228 7906 4212 7976 4227 7977
TIME...MOT...LOC 0720Z 241DEG 35KT 4227 7987

$$

APFFEL

2 follow-up statements

268 
WWUS51 KBUF 040800
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
400 AM EDT SUN SEP 4 2011

NYC013-040815-
/O.CON.KBUF.SV.W.0089.000000T0000Z-110904T0815Z/
CHAUTAUQUA NY-
400 AM EDT SUN SEP 4 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 AM EDT
FOR NORTHEASTERN CHAUTAUQUA COUNTY...

AT 354 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR BROCTON...OR 7 MILES
WEST OF FREDONIA...MOVING NORTHEAST AT 40 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND DAMAGE WITH THIS STORM MAY OCCUR AHEAD OF ANY RAIN OR 
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER. 
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
SUNDAY MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4221 7935 4238 7954 4242 7946 4250 7935
      4257 7914 4253 7907 4228 7906
TIME...MOT...LOC 0759Z 241DEG 35KT 4245 7942

$$

APFFEL

927 
WWUS51 KBUF 040813
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
413 AM EDT SUN SEP 4 2011

NYC013-040823-
/O.EXP.KBUF.SV.W.0089.000000T0000Z-110904T0815Z/
CHAUTAUQUA NY-
413 AM EDT SUN SEP 4 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHAUTAUQUA COUNTY
WILL EXPIRE AT 415 AM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 AM EDT
SUNDAY MORNING FOR WESTERN NEW YORK.

LAT...LON 4221 7935 4238 7954 4242 7946 4250 7935
      4257 7914 4253 7907 4228 7906
TIME...MOT...LOC 0813Z 241DEG 35KT 4252 7926

$$

APFFEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 3, 8:59 PM EDT	Special Weather Statement	BUF	Allegany	46 min
Sep 3, 9:04 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	41 min
Sep 4, 3:00 AM EDT	Special Marine Warning	BUF		90 min
Sep 4, 3:39 AM EDT	Special Marine Warning	BUF		81 min
Sep 4, 3:49 AM EDT	Special Marine Warning	BUF		56 min
Sep 4, 3:55 AM EDT	Special Weather Statement	BUF	Erie	65 min
Sep 4, 4:09 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Niagara	57 min
Sep 4, 4:11 AM EDT	Special Marine Warning	BUF		61 min
Sep 4, 4:41 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Monroe, Niagara, Orleans	45 min
Sep 4, 4:46 AM EDT	Special Marine Warning	BUF		70 min
Sep 4, 5:20 AM EDT	Special Weather Statement	BUF	Chautauqua	40 min
Sep 4, 6:40 AM EDT	Special Marine Warning	BUF		80 min
Sep 4, 7:31 AM EDT	Special Weather Statement	BUF	Jefferson	44 min
Sep 4, 7:57 AM EDT	Special Marine Warning	BUF		63 min
Sep 4, 3:41 PM EDT	Special Marine Warning	BUF		64 min
Sep 4, 4:53 PM EDT	Special Weather Statement	BUF	Allegany, Livingston, Ontario, Wyoming	67 min

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.