Alert archive / New York / Tornado Warnings in 2009

Tornado Warning 5, NWS Buffalo, NY

July 26, 2009Allegany County, New York

NWS Buffalo, NY issued this tornado warning at Jul 26, 2009, 8:15 PM EDT for Allegany County, New York. It was in force for 45 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
Jul 26, 2009, 8:15 PM EDT (00:15 UTC)
Expired
Jul 26, 2009, 9:00 PM EDT
In force
45 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 103 km from the middle of the area, began a volume at 00:17 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 nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.3 hours before the alert went out and 100 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 2009-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 60 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 2009-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.19395878Sfc1 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
60 J/kg
Mixed-layer CIN
-89 J/kg
Mixed-layer LCL
1289 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WFUS51 KBUF 270015
TORBUF
NYC003-270100-
/O.NEW.KBUF.TO.W.0005.090727T0015Z-090727T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
815 PM EDT SUN JUL 26 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL ALLEGANY COUNTY IN WESTERN NEW YORK...
  THIS INCLUDES THE CITY OF WELLSVILLE...

* UNTIL 900 PM EDT

* AT 814 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 19 MILES WEST OF
  WELLSVILLE...OR 6 MILES EAST OF OLEAN...MOVING EAST AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  WELLSVILLE BY 900 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4206 7831 4212 7831 4213 7831 4227 7797
      4205 7790
TIME...MOT...LOC 0016Z 260DEG 21KT 4209 7830

$$

RSH
2 follow-up statements
000 
WWUS51 KBUF 270042
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
842 PM EDT SUN JUL 26 2009

NYC003-270100-
/O.CON.KBUF.TO.W.0005.000000T0000Z-090727T0100Z/
ALLEGANY NY-
842 PM EDT SUN JUL 26 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 PM EDT FOR CENTRAL
ALLEGANY COUNTY...

AT 838 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR RICHBURG...OR 9
MILES WEST OF WELLSVILLE...MOVING EAST AT 25 MPH.

THE TORNADO WILL BE NEAR...
  WELLSVILLE BY 900 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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.

&&

LAT...LON 4206 7818 4218 7819 4227 7797 4205 7790
TIME...MOT...LOC 0040Z 260DEG 21KT 4211 7811

$$

THOMAS
000 
WWUS51 KBUF 270103
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
903 PM EDT SUN JUL 26 2009

NYC003-270113-
/O.EXP.KBUF.TO.W.0005.000000T0000Z-090727T0100Z/
ALLEGANY NY-
903 PM EDT SUN JUL 26 2009

...THE TORNADO WARNING FOR CENTRAL ALLEGANY COUNTY HAS EXPIRED...

AT 903 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4206 7818 4218 7819 4227 7797 4205 7790
TIME...MOT...LOC 0042Z 260DEG 21KT 4211 7810

$$

THOMAS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 10:32 AM EDTSmall Craft AdvisoryBUF8 hr

Nearby

Tornado Warnings in New York, 2009Every tornado warning in 2009Tornadoes in 2009

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.