Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 28, NWS Buffalo, NY

May 29, 20115 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2011, 10:27 PM EDT for 5 counties in New York. It was in force for 63 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
May 29, 2011, 10:27 PM EDT (02:27 UTC)
Expired
May 29, 2011, 11:30 PM EDT
In force
63 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 69 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

TimeReportWhereRemark
May 29, 10:50 PM EDTTSTM WND DMG1 W Spencerport, NYTREE SNAPPED WITH NUMEROUS LIMBS DOWN AT ROUTE 31 NEAR COLBY ST.
May 29, 11:10 PM EDTTSTM WND DMGFairport, NYTREES AND LINES DOWN.
May 29, 11:10 PM EDTTSTM WND DMGPenfield, NYTREES AND LINES 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.

IssuedProductOfficeLasted
May 29, 8:52 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 2.5 hours before the alert went out and 67 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 00:00Z on 2011-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1339 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 00:00Z on 2011-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

893 
WUUS51 KBUF 300227
SVRBUF
NYC037-051-055-069-073-300330-
/O.NEW.KBUF.SV.W.0028.110530T0227Z-110530T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1027 PM EDT SUN MAY 29 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GENESEE COUNTY IN WESTERN NEW YORK
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  MONROE COUNTY IN WESTERN NEW YORK
  NORTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK
  ORLEANS COUNTY IN WESTERN NEW YORK

* UNTIL 1130 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 POINT BREEZE TO 6 MILES EAST OF DARIEN...OR ALONG A LINE
  EXTENDING FROM 11 MILES NORTH OF ALBION TO 9 MILES SOUTHWEST OF
  BATAVIA...AND MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  PAVILION...
  LE ROY...
  HAMLIN BEACH...
  CHURCHVILLE...
  SPENCERPORT...
  SCOTTSVILLE...
  HENRIETTA...
  EAST ROCHESTER...
  PENFIELD...

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!

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

&&

LAT...LON 4338 7836 4339 7811 4334 7774 4324 7755
      4328 7739 4291 7738 4287 7829 4287 7837
TIME...MOT...LOC 0227Z 267DEG 36KT 4339 7825 4288 7824

$$

TMA
4 follow-up statements
482 
WWUS51 KBUF 300242
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1042 PM EDT SUN MAY 29 2011

NYC037-051-055-069-073-300330-
/O.CON.KBUF.SV.W.0028.000000T0000Z-110530T0330Z/
GENESEE NY-LIVINGSTON NY-ONTARIO NY-ORLEANS NY-MONROE NY-
1042 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR MONROE...EASTERN ORLEANS...NORTHWESTERN ONTARIO...NORTHERN
LIVINGSTON AND EASTERN GENESEE COUNTIES...

AT 1040 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED
ALONG A LINE EXTENDING FROM 6 MILES NORTH OF KENDALL TO PAVILION...OR
ALONG A LINE EXTENDING FROM 12 MILES NORTHEAST OF ALBION TO 10 MILES
SOUTHEAST OF BATAVIA...MOVING EAST AT 40 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  HAMLIN BEACH...
  MUMFORD...
  SPENCERPORT...
  INDUSTRY...
  RUSH...
  HENRIETTA...
  MENDON...
  PENFIELD...

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 4291 7738 4288 7823 4335 7824 4339 7811
      4334 7774 4324 7755 4328 7739
TIME...MOT...LOC 0241Z 267DEG 36KT 4339 7805 4288 7805

$$

APFFEL
590 
WWUS51 KBUF 300303
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1103 PM EDT SUN MAY 29 2011

NYC037-073-300311-
/O.CAN.KBUF.SV.W.0028.000000T0000Z-110530T0330Z/
GENESEE NY-ORLEANS NY-
1103 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN ORLEANS AND EASTERN
GENESEE COUNTIES IS CANCELLED...

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

LAT...LON 4291 7738 4289 7786 4333 7791 4334 7774
      4324 7755 4328 7739
TIME...MOT...LOC 0301Z 267DEG 36KT 4330 7779 4289 7778

$$

NYC051-055-069-300330-
/O.CON.KBUF.SV.W.0028.000000T0000Z-110530T0330Z/
LIVINGSTON NY-ONTARIO NY-MONROE NY-
1103 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR MONROE...NORTHWESTERN ONTARIO AND NORTHEASTERN LIVINGSTON
COUNTIES...

AT 1100 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 HILTON TO AVON...OR ALONG A LINE
EXTENDING FROM HILTON TO 6 MILES NORTH OF GENESEO...MOVING EAST AT 40
MPH. THIS LINE WILL MOVE ACROSS THE ROCHESTER METROPOLITAN AREA 
THROUGH 1130 PM. 

SOME LOCATIONS IN THE WARNING INCLUDE...
  RUSH...
  HENRIETTA...
  MENDON...
  PENFIELD...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4291 7738 4289 7786 4333 7791 4334 7774
      4324 7755 4328 7739
TIME...MOT...LOC 0301Z 267DEG 36KT 4330 7779 4289 7778

$$

APFFEL
809 
WWUS51 KBUF 300320
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1120 PM EDT SUN MAY 29 2011

NYC051-300329-
/O.CAN.KBUF.SV.W.0028.000000T0000Z-110530T0330Z/
LIVINGSTON NY-
1120 PM EDT SUN MAY 29 2011

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

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

LAT...LON 4291 7738 4292 7756 4294 7758 4325 7761
      4324 7755 4328 7739
TIME...MOT...LOC 0319Z 267DEG 36KT 4324 7745 4291 7741

$$

NYC055-069-300330-
/O.CON.KBUF.SV.W.0028.000000T0000Z-110530T0330Z/
ONTARIO NY-MONROE NY-
1120 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT
FOR EASTERN MONROE AND NORTHWESTERN ONTARIO COUNTIES...

AT 1114 PM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE 
MOVING EAST OF ROCHESTER INTO EASTERN PORTIONS OF MONROE COUNTY AT 
40 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  EASTERN MONROE COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4291 7738 4292 7756 4294 7758 4325 7761
      4324 7755 4328 7739
TIME...MOT...LOC 0319Z 267DEG 36KT 4324 7745 4291 7741

$$

APFFEL
306 
WWUS51 KBUF 300325
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1125 PM EDT SUN MAY 29 2011

NYC055-069-300335-
/O.EXP.KBUF.SV.W.0028.000000T0000Z-110530T0330Z/
ONTARIO NY-MONROE NY-
1125 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MONROE AND
NORTHWESTERN ONTARIO COUNTIES WILL EXPIRE AT 1130 PM EDT...

AT 1125 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 ALLOWED TO EXPIRE.

LAT...LON 4291 7738 4292 7756 4294 7758 4325 7761
      4324 7755 4328 7739
TIME...MOT...LOC 0325Z 267DEG 36KT 4321 7736 4288 7733

$$

APFFEL

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 8:03 PM EDTSpecial Marine WarningBUF87 min
May 29, 8:34 PM EDTSevere Thunderstorm WarningBUFChautauqua56 min
May 29, 8:58 PM EDTSpecial Marine WarningBUF62 min
May 29, 9:17 PM EDTSevere Thunderstorm WarningBUFCattaraugus, Chautauqua58 min
May 29, 9:24 PM EDTSpecial Weather StatementBUFErie, Niagara51 min
May 29, 9:42 PM EDTSpecial Marine WarningBUF33 min
May 29, 9:57 PM EDTSpecial Marine WarningBUF63 min
May 29, 10:04 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus56 min
May 29, 10:18 PM EDTSpecial Weather StatementBUFGenesee, Livingston, Monroe, Orleans, Wyoming57 min
May 29, 10:21 PM EDTSevere Thunderstorm WarningBUFAllegany, Genesee, Livingston, Wyoming34 min
May 29, 10:30 PM EDTSevere Thunderstorm WarningBUFAllegany26 min
May 29, 10:41 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Ontario, Wyoming50 min
May 29, 10:57 PM EDTSpecial Marine WarningBUF63 min
May 29, 11:13 PM EDTSevere Thunderstorm WarningBUFMonroe, Ontario, Wayne62 min
May 29, 11:39 PM EDTSevere Thunderstorm WarningBUFCayuga, Oswego, Wayne66 min
May 29, 11:44 PM EDTSpecial Marine WarningBUF46 min
May 30, 12:31 AM EDTSpecial Weather StatementBUFLewis74 min

Nearby

Severe Thunderstorm Warnings in New York, 2011Every 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.