Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 31, NWS Buffalo, NY

May 29, 2011Monroe County, Ontario County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2011, 11:13 PM EDT for Monroe County, Ontario County, Wayne County, New York. It was in force for 62 min. 6 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 29, 2011, 11:13 PM EDT (03:13 UTC)
Expired: May 30, 2011, 12:15 AM EDT
In force: 62 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Monroe County, NY, Ontario County, NY, Wayne County, NY

The radar

The Buffalo radar (KBUF), 134 km from the middle of the area, began a volume at 03:14 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, 11:15 PM EDT	TSTM WND DMG	Canandaigua, NY	TREES AND WIRES DOWN
May 29, 11:30 PM EDT	TSTM WND DMG	Newark, NY	TREE DOWN.
May 29, 11:30 PM EDT	TSTM WND DMG	Palmyra, NY	UTILITY POLE DOWN.
May 29, 11:30 PM EDT	TSTM WND DMG	Williamson, NY	MULTIPLE TREES DOWN.
May 29, 11:40 PM EDT	TSTM WND DMG	Geneva, NY	LINES DOWN.
May 29, 11:40 PM EDT	TSTM WND DMG	West Junius, NY	TREES DOWN ON THRU 90.

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, 3.2 hours before the alert went out and 131 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.

876 
WUUS51 KBUF 300313
SVRBUF
NYC055-069-117-300415-
/O.NEW.KBUF.SV.W.0031.110530T0313Z-110530T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1113 PM EDT SUN MAY 29 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL MONROE COUNTY IN WESTERN NEW YORK
  ONTARIO COUNTY IN WESTERN NEW YORK
  WAYNE COUNTY IN WESTERN NEW YORK

* UNTIL 1215 AM EDT

* AT 1109 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 6 MILES WEST OF WEBSTER TO VICTOR TO 12 MILES SOUTHWEST OF
  CANANDAIGUA...AND MOVING   EAST AT 45 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  CANANDAIGUA...
  ONTARIO...
  WILLIAMSON...
  PHELPS...
  SODUS...
  CLYDE...

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 4324 7754 4329 7736 4330 7709 4328 7704
      4328 7695 4330 7691 4332 7679 4335 7672
      4302 7671 4300 7695 4276 7697 4276 7731
      4274 7733 4274 7739
TIME...MOT...LOC 0313Z 248DEG 39KT 4324 7748 4300 7737
          4275 7732

$$

TMA

3 follow-up statements

348 
WWUS51 KBUF 300334
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1134 PM EDT SUN MAY 29 2011

NYC055-300343-
/O.CAN.KBUF.SV.W.0031.000000T0000Z-110530T0415Z/
MONROE NY-
1134 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL MONROE COUNTY IS
CANCELLED...

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

LAT...LON 4276 7722 4329 7736 4330 7712 4328 7704
      4328 7695 4330 7691 4332 7679 4335 7672
      4302 7671 4300 7695 4276 7697
TIME...MOT...LOC 0333Z 248DEG 39KT 4331 7717 4308 7708
          4284 7697

$$

NYC069-117-300415-
/O.CON.KBUF.SV.W.0031.000000T0000Z-110530T0415Z/
ONTARIO NY-WAYNE NY-
1134 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR WAYNE AND NORTHEASTERN ONTARIO COUNTIES...

AT 1129 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM PULTNEYVILLE TO NEWARK TO GENEVA...OR ALONG A LINE
EXTENDING FROM 11 MILES NORTHEAST OF WEBSTER TO 14 MILES NORTHEAST OF
CANANDAIGUA TO GENEVA...MOVING EAST AT 45 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  SODUS...
  SODUS POINT...
  NORTH ROSE...
  SAVANNAH...
  RED CREEK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. 
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 4276 7722 4329 7736 4330 7712 4328 7704
      4328 7695 4330 7691 4332 7679 4335 7672
      4302 7671 4300 7695 4276 7697
TIME...MOT...LOC 0333Z 248DEG 39KT 4331 7717 4308 7708
          4284 7697

$$

APFFEL

051 
WWUS51 KBUF 300346
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1146 PM EDT SUN MAY 29 2011

NYC069-300355-
/O.CAN.KBUF.SV.W.0031.000000T0000Z-110530T0415Z/
ONTARIO NY-
1146 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ONTARIO COUNTY IS
CANCELLED...

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

LAT...LON 4302 7700 4330 7712 4328 7704 4328 7695
      4330 7691 4332 7679 4335 7672 4304 7671
      4304 7672 4302 7671 4301 7696
TIME...MOT...LOC 0345Z 248DEG 39KT 4336 7700 4313 7691
          4288 7681

$$

NYC117-300415-
/O.CON.KBUF.SV.W.0031.000000T0000Z-110530T0415Z/
WAYNE NY-
1146 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT
FOR EASTERN WAYNE COUNTY...

AT 1144 PM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTH OF SODUS POINT TO
CLYDE TO 13 MILES SOUTH OF SAVANNAH...OR ALONG A LINE EXTENDING FROM
23 MILES NORTHEAST OF WEBSTER TO 13 MILES NORTHWEST OF MONTEZUMA TO
SENECA FALLS...MOVING EAST AT 45 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  NORTH ROSE...
  SAVANNAH...
  RED CREEK...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. 
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 4302 7700 4330 7712 4328 7704 4328 7695
      4330 7691 4332 7679 4335 7672 4304 7671
      4304 7672 4302 7671 4301 7696
TIME...MOT...LOC 0345Z 248DEG 39KT 4336 7700 4313 7691
          4288 7681

$$

APFFEL

129 
WWUS51 KBUF 300406
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1206 AM EDT MON MAY 30 2011

NYC117-300416-
/O.EXP.KBUF.SV.W.0031.000000T0000Z-110530T0415Z/
WAYNE NY-
1206 AM EDT MON MAY 30 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WAYNE COUNTY WILL
EXPIRE AT 1215 AM EDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT MONDAY
MORNING FOR WESTERN NEW YORK.

LAT...LON 4302 7700 4330 7712 4328 7704 4328 7695
      4330 7691 4332 7679 4335 7672 4304 7671
      4304 7672 4302 7671 4301 7696
TIME...MOT...LOC 0406Z 248DEG 39KT 4344 7671 4321 7662
          4296 7652

$$

SFM

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, 10:30 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	26 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, 11:39 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.