Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 9, NWS Buffalo, NY

April 27, 2011Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Apr 27, 2011, 5:06 PM EDT for Cattaraugus County, Chautauqua County, Erie County, New York. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 27, 2011, 5:06 PM EDT (21:06 UTC)
Expired: Apr 27, 2011, 6:00 PM EDT
In force: 54 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 74 km from the middle of the area, began a volume at 21:08 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 27, 3:10 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.1 hours before the alert went out and 73 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: 27 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

835 
WUUS51 KBUF 272106
SVRBUF
NYC009-013-029-272200-
/O.NEW.KBUF.SV.W.0009.110427T2106Z-110427T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
506 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CATTARAUGUS COUNTY IN WESTERN NEW YORK
  NORTHERN CHAUTAUQUA COUNTY IN WESTERN NEW YORK
  SOUTHERN ERIE COUNTY IN WESTERN NEW YORK

* UNTIL 600 PM EDT

* AT 503 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 18 MILES WEST OF WESTFIELD TO 6 MILES EAST OF WESTFIELD TO 8
  MILES NORTHWEST OF FALCONER TO 7 MILES EAST OF FALCONER TO 16 MILES
  SOUTH OF ALLEGANY PARK...AND MOVING NORTHEAST AT 60 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  ALLEGANY PARK...
  DUNKIRK...
  SILVER CREEK...
  OTTO...
  SPRINGVILLE...
  EAST CONCORD...
  SARDINIA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR WESTERN NEW YORK.

&&

LAT...LON 4199 7906 4205 7911 4218 7932 4226 7949
      4229 7971 4242 7946 4250 7936 4256 7916
      4269 7907 4274 7892 4277 7889 4243 7831
      4228 7831 4199 7861 4199 7888
TIME...MOT...LOC 2107Z 217DEG 54KT 4244 7986 4234 7941
          4227 7924 4213 7902 4190 7885

$$

HIBBERT

2 follow-up statements

318 
WWUS51 KBUF 272122
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
522 PM EDT WED APR 27 2011

NYC009-013-029-272200-
/O.CON.KBUF.SV.W.0009.000000T0000Z-110427T2200Z/
CATTARAUGUS NY-CHAUTAUQUA NY-ERIE NY-
522 PM EDT WED APR 27 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR SOUTHERN ERIE...NORTHEASTERN CHAUTAUQUA AND CATTARAUGUS
COUNTIES...

AT 517 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 37 MILES WEST OF SOUTH DAYTON TO 14 MILES NORTHWEST OF
SOUTH DAYTON TO SOUTH DAYTON TO LITTLE VALLEY TO ALLEGANY 
PARK...MOVING NORTHEAST AT 60 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  OTTO...
  ASHFORD HOLLOW...
  ISCHUA...
  SARDINIA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR WESTERN NEW YORK.

&&

LAT...LON 4199 7880 4199 7884 4212 7893 4222 7899
      4242 7921 4254 7911 4274 7892 4277 7889
      4243 7831 4228 7831
TIME...MOT...LOC 2122Z 217DEG 54KT 4262 7967 4252 7922
          4245 7905 4231 7883 4208 7866

$$

HIBBERT

076 
WWUS51 KBUF 272153
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
553 PM EDT WED APR 27 2011

NYC009-013-029-272202-
/O.EXP.KBUF.SV.W.0009.000000T0000Z-110427T2200Z/
CATTARAUGUS NY-CHAUTAUQUA NY-ERIE NY-
553 PM EDT WED APR 27 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ERIE...NORTHEASTERN
CHAUTAUQUA AND CATTARAUGUS COUNTIES WILL EXPIRE AT 600 PM EDT...

AT 552 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE 
THUNDERSTORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND WERE NO 
LONGER SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT WEDNESDAY EVENING
FOR WESTERN NEW YORK.

LAT...LON 4199 7880 4199 7884 4212 7893 4222 7899
      4242 7921 4254 7911 4274 7892 4277 7889
      4243 7831 4228 7831
TIME...MOT...LOC 2152Z 217DEG 54KT 4298 7930 4288 7885
          4281 7868 4267 7846 4244 7829

$$

HIBBERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 10:21 PM EDT	Areal Flood Advisory	BUF	Ontario, Wayne	3 hr
Apr 27, 1:57 PM EDT	Gale Warning	BUF		30 hr
Apr 27, 1:57 PM EDT	Small Craft Advisory	BUF		20 hr
Apr 27, 1:58 PM EDT	Flash Flood Watch	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	22 hr
Apr 27, 1:58 PM EDT	Wind Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	26 hr
Apr 27, 4:25 PM EDT	Special Marine Warning	BUF		50 min
Apr 27, 4:49 PM EDT	Special Weather Statement	BUF	Chautauqua	41 min
Apr 27, 5:05 PM EDT	Special Marine Warning	BUF		25 min
Apr 27, 5:43 PM EDT	Tornado Warning	BUF	Allegany, Cattaraugus	32 min
Apr 27, 5:51 PM EDT	Special Marine Warning	BUF		84 min
Apr 27, 6:11 PM EDT	Special Weather Statement	BUF	Genesee, Livingston, Monroe, Wyoming	64 min
Apr 27, 6:17 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston	43 min
Apr 27, 6:52 PM EDT	Special Weather Statement	BUF	Ontario, Wayne	53 min
Apr 27, 6:56 PM EDT	Special Marine Warning	BUF		94 min
Apr 27, 6:56 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario, Wayne	49 min
Apr 27, 7:32 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	13 min
Apr 27, 7:39 PM EDT	Areal Flood Advisory	BUF	Allegany, Livingston, Monroe, Ontario, Wayne	3 hr
Apr 27, 7:42 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.