Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 6, NWS Buffalo, NY

January 17, 20125 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jan 17, 2012, 6:43 PM EST for 5 counties in New York. It was in force for 47 min. 8 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: Jan 17, 2012, 6:43 PM EST (23:43 UTC)
Expired: Jan 17, 2012, 7:30 PM EST
In force: 47 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 78 km from the middle of the area, began a volume at 23:43 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

Time	Report	Where	Remark
Jan 17, 6:43 PM EST	TSTM WND DMG	Le Roy, NY	TREES AND POWERLINES DOWN
Jan 17, 6:45 PM EST	TSTM WND DMG	Le Roy, NY	TREES AND WIRES DOWN.
Jan 17, 6:51 PM EST	TSTM WND DMG	Caledonia, NY	METAL SHED BLOWN OVER
Jan 17, 6:58 PM EST	TSTM WND DMG	Perry, NY	TREES AND POWERLINES DOWN
Jan 17, 7:00 PM EST	TSTM WND DMG	Leicester, NY	TREES DOWN
Jan 17, 7:04 PM EST	TSTM WND DMG	Mount Morris, NY	TREES DOWN
Jan 17, 7:10 PM EST	TSTM WND DMG	Rochester, NY	TREES AND POWELINES DOWN THROUGHOUT COUNTY
Jan 17, 7:11 PM EST	TSTM WND GST 59	Rochester Intl Arpt, NY	ASOS

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 12:00Z, 11.7 hours before the alert went out and 76 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 479 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 321 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.

033 
WUUS51 KBUF 172343
SVRBUF
NYC037-051-055-069-121-180030-
/O.NEW.KBUF.SV.W.0006.120117T2343Z-120118T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
643 PM EST TUE JAN 17 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GENESEE COUNTY IN WESTERN NEW YORK
  LIVINGSTON COUNTY IN WESTERN NEW YORK
  MONROE COUNTY IN WESTERN NEW YORK
  WESTERN ONTARIO COUNTY IN WESTERN NEW YORK
  EASTERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 730 PM EST

* AT 639 PM EST...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 HILTON TO 6 MILES NORTHWEST OF PORTAGEVILLE...OR ALONG A LINE
  EXTENDING FROM HILTON TO 22 MILES SOUTHWEST OF GENESEO...AND MOVING
  EAST AT 85 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  ROCHESTER...
  GENESEO...
  DANSVILLE...
  BRISTOL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND DAMAGE WITH THESE STORMS WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4257 7836 4314 7805 4314 7800 4322 7800
      4329 7796 4331 7768 4324 7755 4328 7743
      4328 7738 4305 7737 4257 7739 4257 7765
      4254 7766
TIME...MOT...LOC 2343Z 262DEG 72KT 4330 7771 4262 7804

$$

WOOD

2 follow-up statements

485 
WWUS51 KBUF 180015
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
715 PM EST TUE JAN 17 2012

NYC037-180025-
/O.CAN.KBUF.SV.W.0006.000000T0000Z-120118T0030Z/
GENESEE NY-
715 PM EST TUE JAN 17 2012

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

LAT...LON 4257 7815 4324 7755 4328 7744 4328 7738
      4305 7737 4257 7739 4257 7765 4254 7766
TIME...MOT...LOC 0015Z 262DEG 72KT 4334 7724 4258 7792

$$

NYC051-055-069-121-180030-
/O.CON.KBUF.SV.W.0006.000000T0000Z-120118T0030Z/
LIVINGSTON NY-ONTARIO NY-WYOMING NY-MONROE NY-
715 PM EST TUE JAN 17 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EST
FOR SOUTHEASTERN MONROE...EAST CENTRAL WYOMING...WESTERN ONTARIO AND
LIVINGSTON COUNTIES...

AT 713 PM EST...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 11 MILES NORTHEAST OF WEBSTER TO NUNDA...OR ALONG A
LINE EXTENDING FROM 11 MILES NORTHEAST OF WEBSTER TO 14 MILES WEST OF
DANSVILLE...MOVING EAST AT 85 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  HEMLOCK...
  SPRINGWATER...
  BRISTOL...
  BRISTOL MOUNTAIN...

LAT...LON 4257 7815 4324 7755 4328 7744 4328 7738
      4305 7737 4257 7739 4257 7765 4254 7766
TIME...MOT...LOC 0015Z 262DEG 72KT 4334 7724 4258 7792

$$

WOOD

210 
WWUS51 KBUF 180031
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
731 PM EST TUE JAN 17 2012

NYC051-055-069-121-180041-
/O.EXP.KBUF.SV.W.0006.000000T0000Z-120118T0030Z/
LIVINGSTON NY-ONTARIO NY-WYOMING NY-MONROE NY-
731 PM EST TUE JAN 17 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONROE...EAST
CENTRAL WYOMING...WESTERN ONTARIO AND LIVINGSTON COUNTIES HAS
EXPIRED...

AT 731 PM EST 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 4257 7815 4324 7755 4328 7744 4328 7738
      4305 7737 4257 7739 4257 7765 4254 7766
TIME...MOT...LOC 0015Z 262DEG 72KT 4330 7722 4255 7792

$$

WOOD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 4:02 AM EST	Lake Effect Snow Watch	BUF	Cattaraugus, Chautauqua, Erie, Lewis, Oswego, Wyoming	11 hr
Jan 17, 4:05 AM EST	Gale Warning	BUF		30 hr
Jan 17, 4:05 AM EST	Small Craft Advisory	BUF		6 hr
Jan 17, 4:15 AM EST	Wind Advisory	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	6 hr
Jan 17, 9:57 AM EST	High Wind Warning	BUF	Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 10 more	16 hr
Jan 17, 3:06 PM EST	Lake Effect Snow Advisory	BUF	Cattaraugus, Cayuga, Chautauqua, Erie, Lewis, Oswego and 2 more	19 hr
Jan 17, 5:04 PM EST	Special Marine Warning	BUF		41 min
Jan 17, 5:08 PM EST	Severe Thunderstorm Warning	BUF	Chautauqua	37 min
Jan 17, 5:24 PM EST	Special Marine Warning	BUF		51 min
Jan 17, 5:36 PM EST	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie, Wyoming	39 min
Jan 17, 5:42 PM EST	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans, Wyoming	33 min
Jan 17, 6:11 PM EST	Severe Thunderstorm Warning	BUF	Erie, Genesee, Livingston, Monroe, Niagara, Orleans and 1 more	34 min
Jan 17, 6:15 PM EST	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Wyoming	30 min
Jan 17, 6:45 PM EST	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Livingston, Wyoming	45 min

Nearby

Severe Thunderstorm Warnings in New York, 2012 Every severe thunderstorm warning in 2012

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.