Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 29, NWS Buffalo, NY

May 29, 2011Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2011, 10:30 PM EDT for Allegany County, New York. It was in force for 26 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: May 29, 2011, 10:30 PM EDT (02:30 UTC)
Expired: May 29, 2011, 10:56 PM EDT
In force: 26 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 107 km from the middle of the area, began a volume at 02:30 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 29, 10:35 PM EDT	TSTM WND DMG	Belmont, NY	MULTIPLE 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
May 29, 8:52 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 2.5 hours before the alert went out and 104 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: 1339 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 834 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

993 
WUUS51 KBUF 300230
SVRBUF
NYC003-300315-
/O.NEW.KBUF.SV.W.0029.110530T0230Z-110530T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1030 PM EDT SUN MAY 29 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEGANY COUNTY IN WESTERN NEW YORK

* UNTIL 1115 PM EDT

* AT 1026 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 12 MILES EAST OF HOUGHTON TO 10 MILES SOUTH OF
  WELLSVILLE...AND MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  ALFRED...
  WHITESVILLE...

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. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT MONDAY
MORNING FOR WESTERN NEW YORK.

&&

LAT...LON 4200 7814 4251 7820 4249 7784 4248 7784
      4247 7771 4238 7773 4208 7773 4200 7774
      4199 7775 4199 7793
TIME...MOT...LOC 0230Z 265DEG 30KT 4248 7788 4198 7792

$$

TMA

1 follow-up statement

293 
WWUS51 KBUF 300256
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1056 PM EDT SUN MAY 29 2011

NYC003-300306-
/O.CAN.KBUF.SV.W.0029.000000T0000Z-110530T0315Z/
ALLEGANY NY-
1056 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR ALLEGANY COUNTY IS
CANCELLED...

AT 1056 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN CANCELLED.

LAT...LON 4200 7814 4251 7820 4249 7784 4248 7784
      4247 7771 4238 7773 4208 7773 4200 7774
      4199 7775 4199 7793
TIME...MOT...LOC 0256Z 265DEG 30KT 4250 7759 4200 7763

$$

APFFEL

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 8:03 PM EDT	Special Marine Warning	BUF		87 min
May 29, 8:34 PM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	56 min
May 29, 8:58 PM EDT	Special Marine Warning	BUF		62 min
May 29, 9:17 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	58 min
May 29, 9:24 PM EDT	Special Weather Statement	BUF	Erie, Niagara	51 min
May 29, 9:42 PM EDT	Special Marine Warning	BUF		33 min
May 29, 9:57 PM EDT	Special Marine Warning	BUF		63 min
May 29, 10:04 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	56 min
May 29, 10:18 PM EDT	Special Weather Statement	BUF	Genesee, Livingston, Monroe, Orleans, Wyoming	57 min
May 29, 10:21 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Genesee, Livingston, Wyoming	34 min
May 29, 10:27 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans	63 min
May 29, 10:41 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Ontario, Wyoming	50 min
May 29, 10:57 PM EDT	Special Marine Warning	BUF		63 min
May 29, 11:13 PM EDT	Severe Thunderstorm Warning	BUF	Monroe, Ontario, Wayne	62 min
May 29, 11:39 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	66 min
May 29, 11:44 PM EDT	Special Marine Warning	BUF		46 min
May 30, 12:31 AM EDT	Special Weather Statement	BUF	Lewis	74 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.