Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 80, NWS Buffalo, NY

September 8, 20124 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 8, 2012, 10:55 AM EDT for 4 counties in New York. It was in force for 80 min. 3 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: Sep 8, 2012, 10:55 AM EDT (14:55 UTC)
Expired: Sep 8, 2012, 12:15 PM EDT
In force: 80 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Allegany County, NY, Livingston County, NY, Ontario County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 90 km from the middle of the area, began a volume at 14:59 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
Sep 8, 10:59 AM EDT	TSTM WND DMG	Cuba, NY	TREES DOWN.
Sep 8, 11:36 AM EDT	TSTM WND DMG	Dansville, NY	TREES AND WIRES DOWN.
Sep 8, 11:40 AM EDT	TSTM WND DMG	Springwater, NY	TREES AND WIRES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Sep 8, 10:03 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 2.9 hours before the alert went out and 287 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: 76 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 700 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

158 
WUUS51 KBUF 081455
SVRBUF
NYC003-051-069-121-081615-
/O.NEW.KBUF.SV.W.0080.120908T1455Z-120908T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1055 AM EDT SAT SEP 8 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ALLEGANY COUNTY IN WESTERN NEW YORK
  SOUTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  EXTREME SOUTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK
  SOUTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 1215 PM EDT

* AT 1050 AM EDT...THE PUBLIC REPORTED A LINE OF SEVERE THUNDERSTORMS
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTHWEST
  OF BLISS TO 16 MILES SOUTH OF CUBA...AND MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  HOUGHTON...
  PORTAGEVILLE...
  WELLSVILLE...
  GROVELAND...
  ALFRED...
  WHITESVILLE...
  SPRINGWATER...
  NAPLES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THE PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE
ACROSS WESTERN NEW YORK. THIS IS AN EXTREMELY DANGEROUS
SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY
FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT
SATURDAY AFTERNOON FOR WESTERN NEW YORK.

&&

LAT...LON 4200 7831 4251 7830 4252 7834 4264 7832
      4266 7736 4257 7737 4257 7765 4253 7767
      4253 7771 4199 7775
TIME...MOT...LOC 1454Z 267DEG 32KT 4265 7825 4201 7834

$$

THOMAS

2 follow-up statements

106 
WWUS51 KBUF 081531
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1131 AM EDT SAT SEP 8 2012

NYC121-081539-
/O.CAN.KBUF.SV.W.0080.000000T0000Z-120908T1615Z/
WYOMING NY-
1131 AM EDT SAT SEP 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WYOMING COUNTY IS
CANCELLED...

THE SEVERE THUNDERSTORMS THAT PROMPTED THE WARNING HAVE EXITED THE 
AREA...THEREFORE THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT 
SATURDAY AFTERNOON FOR PORTIONS OF WESTERN NEW YORK.

LAT...LON 4200 7806 4252 7787 4254 7784 4263 7780
      4266 7736 4257 7737 4257 7765 4253 7767
      4253 7771 4199 7775
TIME...MOT...LOC 1529Z 267DEG 32KT 4265 7774 4202 7799

$$

NYC003-051-069-081615-
/O.CON.KBUF.SV.W.0080.000000T0000Z-120908T1615Z/
ALLEGANY NY-LIVINGSTON NY-ONTARIO NY-
1131 AM EDT SAT SEP 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM EDT
FOR EXTREME SOUTHWESTERN ONTARIO...SOUTHEASTERN LIVINGSTON AND
EASTERN ALLEGANY COUNTIES...

AT 1127 AM 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 7 MILES NORTHWEST OF DANSVILLE TO 8 MILES SOUTHWEST 
OF WELLSVILLE...MOVING EAST AT 35 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  STANNARDS...
  ANDOVER...
  SPRINGWATER...
  WHITESVILLE...
  NAPLES...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIDESPREAD WIND DAMAGE. 
THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A 
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT
SATURDAY AFTERNOON FOR WESTERN NEW YORK.

&&

LAT...LON 4200 7806 4252 7787 4254 7784 4263 7780
      4266 7736 4257 7737 4257 7765 4253 7767
      4253 7771 4199 7775
TIME...MOT...LOC 1529Z 267DEG 32KT 4265 7774 4202 7799

$$

JJR

158 
WWUS51 KBUF 081606
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1206 PM EDT SAT SEP 8 2012

NYC003-051-069-081616-
/O.EXP.KBUF.SV.W.0080.000000T0000Z-120908T1615Z/
ALLEGANY NY-LIVINGSTON NY-ONTARIO NY-
1206 PM EDT SAT SEP 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHWESTERN
ONTARIO...SOUTHEASTERN LIVINGSTON AND EASTERN ALLEGANY COUNTIES WILL
EXPIRE AT 1215 PM EDT...

AT 1206 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 PM EDT 
SATURDAY AFTERNOON FOR PORTIONS OF WESTERN NEW YORK.

LAT...LON 4200 7806 4252 7787 4254 7784 4263 7780
      4266 7736 4257 7737 4257 7765 4253 7767
      4253 7771 4199 7775
TIME...MOT...LOC 1606Z 267DEG 32KT 4266 7729 4203 7755

$$

JJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 8:45 AM EDT	Special Weather Statement	BUF	Cattaraugus, Chautauqua, Erie, Niagara, Orleans	90 min
Sep 8, 8:59 AM EDT	Special Marine Warning	BUF		64 min
Sep 8, 9:10 AM EDT	Special Marine Warning	BUF		95 min
Sep 8, 9:12 AM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua, Erie, Niagara	63 min
Sep 8, 9:51 AM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans, Wyoming	54 min
Sep 8, 10:05 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Erie, Livingston, Wyoming	55 min
Sep 8, 10:33 AM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario, Orleans, Wayne and 1 more	57 min
Sep 8, 10:40 AM EDT	Special Marine Warning	BUF		65 min
Sep 8, 11:20 AM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Livingston, Monroe, Ontario, Oswego, Wayne	70 min
Sep 8, 11:49 AM EDT	Special Marine Warning	BUF		86 min
Sep 8, 12:09 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Jefferson, Oswego	66 min
Sep 8, 12:47 PM EDT	Special Marine Warning	BUF		118 min
Sep 8, 1:05 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	55 min
Sep 8, 1:47 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	58 min
Sep 8, 4:10 PM EDT	Special Weather Statement	BUF	Erie	50 min
Sep 8, 5:15 PM EDT	Special Marine Warning	BUF		50 min
Sep 8, 5:31 PM EDT	Special Marine Warning	BUF		44 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.