Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 24, NWS Buffalo, NY

May 29, 2011Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2011, 8:34 PM EDT for Chautauqua County, New York. It was in force for 56 min. 4 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, 8:34 PM EDT (00:34 UTC)
Expired
May 29, 2011, 9:30 PM EDT
In force
56 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 93 km from the middle of the area, began a volume at 00:37 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, 8:50 PM EDTTSTM WND DMGRipley, NYRV CAMPER BLOWN OVER.
May 29, 8:50 PM EDTHAIL 0.88Ripley, NYTRAINED SPOTTER
May 29, 9:10 PM EDTTSTM WND DMGJamestown, NYLINES AND TREES DOWN.
May 29, 9:10 PM EDTTSTM WND DMGStockton, NYTREES DOWN.

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, 0.6 hours before the alert went out and 93 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.

654 
WUUS51 KBUF 300034
SVRBUF
NYC013-300130-
/O.NEW.KBUF.SV.W.0024.110530T0034Z-110530T0130Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 930 PM EDT

* AT 828 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 24 MILES WEST OF WESTFIELD TO 13 MILES WEST OF FINDLEY LAKE TO
  22 MILES SOUTHWEST OF FINDLEY LAKE...AND MOVING EAST AT 45 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  FINDLEY LAKE...
  WESTFIELD...
  CLYMER...
  CHAUTAUQUA INSTITUTE...
  DUNKIRK...
  LAKEWOOD...
  SILVER CREEK...
  FREWSBURG...

THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.

LAT...LON 4227 7977 4244 7943 4246 7943 4247 7939
      4250 7936 4254 7925 4255 7909 4201 7907
      4199 7912 4199 7976 4203 7977
TIME...MOT...LOC 0031Z 257DEG 39KT 4244 7999 4219 7992
          4197 8003

$$

TMA
2 follow-up statements
347 
WWUS51 KBUF 300112
SVSBUF

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

NYC013-300130-
/O.CON.KBUF.SV.W.0024.000000T0000Z-110530T0130Z/
CHAUTAUQUA NY-
912 PM EDT SUN MAY 29 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR CHAUTAUQUA COUNTY...

AT 907 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. THIS LINE OF STORMS IS MOVING EAST AT 45 
MPH. THE ENTIRE LINE IS PRODUCING DAMAGING WINDS...WITH RADAR 
INDICATING STRONGEST GUSTS ARE ABOUT TO MOVE INTO FREDONIA AND 
DUNKIRK...AND ANOTHER AREA ABOUT TO MOVE INTO PANAMA AND CLYMER.

SOME LOCATIONS IN THE WARNING INCLUDE...
  DUNKIRK...
  ARKWRIGHT...
  GERRY...
  JAMESTOWN...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DAMAGING WINDS UP TO 60 MPH MPH WERE REPORTED IN RIPLEY. THESE ARE 
DANGEROUS STORMS...SEEK SAFE SHELTER AND STAY AWAY FROM WINDOWS!

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

&&

LAT...LON 4203 7975 4225 7964 4244 7943 4246 7943
      4247 7939 4250 7936 4254 7925 4255 7909
      4201 7907 4199 7912 4199 7976
TIME...MOT...LOC 0109Z 257DEG 39KT 4253 7944 4228 7938
          4203 7959

$$

APFFEL
343 
WWUS51 KBUF 300128
SVSBUF

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

NYC013-300136-
/O.EXP.KBUF.SV.W.0024.000000T0000Z-110530T0130Z/
CHAUTAUQUA NY-
928 PM EDT SUN MAY 29 2011

...THE SEVERE THUNDERSTORM WARNING FOR CHAUTAUQUA COUNTY WILL EXPIRE
AT 930 PM EDT...

A WARNING REMAINS IN EFFECT FOR EASTERN PORTIONS OF THE COUNTY...AND 
WESTERN PORTIONS OF CATTARAUGUS COUNTY.

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

LAT...LON 4203 7975 4225 7964 4244 7943 4246 7943
      4247 7939 4250 7936 4254 7925 4255 7909
      4201 7907 4199 7912 4199 7976
TIME...MOT...LOC 0126Z 257DEG 39KT 4257 7919 4232 7914
          4207 7935

$$

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, 8:58 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, 10:27 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.