Alert archive / New York / Tornado Warnings in 2011

Tornado Warning 1, NWS Buffalo, NY

April 27, 2011Allegany County, Cattaraugus County, New York

NWS Buffalo, NY issued this tornado warning at Apr 27, 2011, 5:43 PM EDT for Allegany County, Cattaraugus County, New York. It was in force for 32 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, 5:43 PM EDT (21:43 UTC)
Expired: Apr 27, 2011, 6:15 PM EDT
In force: 32 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Allegany County, NY, Cattaraugus County, NY

The radar

The Buffalo radar (KBUF), 98 km from the middle of the area, began a volume at 21:46 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, 9.7 hours before the alert went out and 96 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.

745 
WFUS51 KBUF 272143
TORBUF
NYC003-009-272215-
/O.NEW.KBUF.TO.W.0001.110427T2143Z-110427T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
543 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN ALLEGANY COUNTY IN WESTERN NEW YORK...
  SOUTHEASTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITY OF OLEAN...

* UNTIL 615 PM EDT

* AT 537 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES SOUTH
  OF ST. BONAVENTURE...OR 6 MILES EAST OF BRADFORD...MOVING NORTHEAST
  AT 45 MPH.

* THE TORNADO WILL BE NEAR...
   WESTON MILLS...
   HINSDALE...
   CUBA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

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

&&

LAT...LON 4204 7870 4239 7815 4217 7788 4199 7821
      4199 7863
TIME...MOT...LOC 2142Z 224DEG 41KT 4199 7847

$$

HIBBERT

1 follow-up statement

201 
WWUS51 KBUF 272203
SVSBUF

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

NYC003-009-272215-
/O.CON.KBUF.TO.W.0001.000000T0000Z-110427T2215Z/
ALLEGANY NY-CATTARAUGUS NY-
603 PM EDT WED APR 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR
SOUTHEASTERN CATTARAUGUS AND WESTERN ALLEGANY COUNTIES...

AT 601 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR CUBA...OR 10 MILES
NORTHEAST OF OLEAN...MOVING NORTHEAST AT 55 MPH.

THE TORNADO SOME LOCATIONS IN THE WARNING INCLUDE...
  FRIENDSHIP...
  BELFAST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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

&&

LAT...LON 4221 7795 4201 7837 4215 7854 4239 7815
TIME...MOT...LOC 2203Z 223DEG 48KT 4217 7824

$$

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, 5:06 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie	54 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

Tornado Warnings in New York, 2011 Every tornado warning in 2011 Tornadoes 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.