Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 25, NWS Buffalo, NY

May 29, 2011Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2011, 9:17 PM EDT for Cattaraugus County, Chautauqua County, New York. It was in force for 58 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
May 29, 2011, 9:17 PM EDT (01:17 UTC)
Expired
May 29, 2011, 10:15 PM EDT
In force
58 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 65 km from the middle of the area, began a volume at 01:16 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, 9:40 PM EDTTSTM WND DMGDayton, NYLINES AND TREES DOWN.
May 29, 9:40 PM EDTTSTM WND DMGLeon, NYLINES AND 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.

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 1.3 hours before the alert went out and 64 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°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.

837 
WUUS51 KBUF 300117
SVRBUF
NYC009-013-300215-
/O.NEW.KBUF.SV.W.0025.110530T0117Z-110530T0215Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 1015 PM EDT

* AT 912 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 27 MILES NORTH OF FALCONER TO 18 MILES SOUTHWEST
  OF LAKEWOOD...AND MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  LAKEWOOD...
  JAMESTOWN WEST...
  FALCONER...
  FREWSBURG...
  OTTO...
  ALLEGANY PARK...
  ASHFORD HOLLOW...

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!

&&

LAT...LON 4200 7936 4251 7931 4253 7899 4248 7896
      4244 7889 4244 7884 4246 7880 4246 7878
      4249 7871 4248 7870 4249 7866 4249 7865
      4200 7864
TIME...MOT...LOC 0115Z 283DEG 32KT 4249 7932 4233 7926
          4210 7945 4197 7958

$$

TMA
2 follow-up statements
572 
WWUS51 KBUF 300148
SVSBUF

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

NYC013-300155-
/O.CAN.KBUF.SV.W.0025.000000T0000Z-110530T0215Z/
CHAUTAUQUA NY-
948 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN CHAUTAUQUA COUNTY IS
CANCELLED...

THE STORM HAS MOVED OUT OF THE COUNTY.

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

LAT...LON 4200 7889 4246 7905 4253 7899 4247 7896
      4244 7889 4246 7878 4249 7871 4248 7870
      4249 7865 4200 7864
TIME...MOT...LOC 0145Z 283DEG 32KT 4242 7891 4227 7885
          4209 7875 4195 7869

$$

NYC009-300215-
/O.CON.KBUF.SV.W.0025.000000T0000Z-110530T0215Z/
CATTARAUGUS NY-
948 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR WESTERN CATTARAUGUS COUNTY...

AT 941 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 
JUST EAST OF THE CHAUTAUQUA AND CATTARAUGUS COUNTY LINE...MOVING 
EAST AT 40 MPH. THE STRONGEST PORTION OF THE LINE WILL MOVE ACROSS 
CATTARAUGUS...AND ELLICOTTVILLE.

SOME LOCATIONS IN THE WARNING INCLUDE...
  SALAMANCA...
  OTTO...
  ELLICOTTVILLE...
  ASHFORD HOLLOW...

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.

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

&&

LAT...LON 4200 7889 4246 7905 4253 7899 4247 7896
      4244 7889 4246 7878 4249 7871 4248 7870
      4249 7865 4200 7864
TIME...MOT...LOC 0145Z 283DEG 32KT 4242 7891 4227 7885
          4209 7875 4195 7869

$$

APFFEL
241 
WWUS51 KBUF 300208
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1008 PM EDT SUN MAY 29 2011

NYC009-300219-
/O.EXP.KBUF.SV.W.0025.000000T0000Z-110530T0215Z/
CATTARAUGUS NY-
1008 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN CATTARAUGUS COUNTY
WILL EXPIRE AT 1015 PM EDT...

AT 1009 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 4200 7889 4246 7905 4253 7899 4247 7896
      4244 7889 4246 7878 4249 7871 4248 7870
      4249 7865 4200 7864
TIME...MOT...LOC 0209Z 283DEG 32KT 4237 7863 4222 7857
          4204 7847 4190 7841

$$

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, 9:24 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, 10:27 PM EDTSevere Thunderstorm WarningBUFGenesee, Livingston, Monroe, Ontario, Orleans63 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.