Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 96, NWS Buffalo, NY

September 11, 20114 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 11, 2011, 2:17 PM EDT for 4 counties in New York. It was in force for 43 min. 1 report 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 11, 2011, 2:17 PM EDT (18:17 UTC)
Expired: Sep 11, 2011, 3:00 PM EDT
In force: 43 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

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

The radar

The Buffalo radar (KBUF), 81 km from the middle of the area, began a volume at 18:17 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.

What was reported inside it

Time	Report	Where	Remark
Sep 11, 2:45 PM EDT	HAIL 0.75	Bristol, NY	DIME SIZE HAIL COVERING GROUND ONE INCH DEEP

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, 6.3 hours before the alert went out and 78 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: 1397 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 19 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.

110 
WUUS51 KBUF 111817
SVRBUF
NYC037-051-069-121-111900-
/O.NEW.KBUF.SV.W.0096.110911T1817Z-110911T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
217 PM EDT SUN SEP 11 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN GENESEE COUNTY IN WESTERN NEW YORK
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  WESTERN ONTARIO COUNTY IN WESTERN NEW YORK
  NORTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 300 PM EDT

* AT 213 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS 
  WERE LOCATED ALONG A LINE EXTENDING FROM  6 MILES NORTH OF 
  GENESEO TO 11 MILES NORTHEAST OF DANSVILLE...AND MOVING EAST AT 15 
  MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  AVON...
  HONEOYE...
  LIMA...
  BRISTOL...

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.

&&

LAT...LON 4292 7809 4297 7775 4297 7772 4295 7773
      4294 7749 4299 7748 4276 7731 4270 7808
TIME...MOT...LOC 1817Z 259DEG 13KT 4288 7779 4271 7758

$$

HIBBERT

1 follow-up statement

739 
WWUS51 KBUF 111850
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
250 PM EDT SUN SEP 11 2011

NYC037-051-069-121-111900-
/O.CON.KBUF.SV.W.0096.000000T0000Z-110911T1900Z/
GENESEE NY-LIVINGSTON NY-ONTARIO NY-WYOMING NY-
250 PM EDT SUN SEP 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM EDT
FOR NORTHEASTERN WYOMING...WEST CENTRAL ONTARIO...NORTHERN LIVINGSTON
AND SOUTHEASTERN GENESEE COUNTIES...

AT 245 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS 
WERE LOCATED ALONG A LINE EXTENDING FROM LIMA TO HONEOYE...MOVING 
EAST AT 15 MPH. OTHER SEVERE THUNDERSTORMS ARE OVER NORTHEASTERN 
WYOMING AND SOUTHEASTERN GENESEE COUNTIES FROM NEAR PAVILION TO 
PERRY...MOVING EAST AT 15 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  WYOMING...
  PERRY...
  LIMA...
  BRISTOL...

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.

&&

LAT...LON 4292 7809 4297 7775 4297 7772 4295 7773
      4294 7749 4299 7748 4276 7731 4270 7808
TIME...MOT...LOC 1849Z 259DEG 13KT 4290 7763 4273 7742

$$

HIBBERT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 11, 12:34 PM EDT	Special Weather Statement	BUF	Erie	56 min
Sep 11, 12:40 PM EDT	Flash Flood Warning	BUF	Cattaraugus, Chautauqua, Erie	3 hr
Sep 11, 12:43 PM EDT	Special Weather Statement	BUF	Genesee	62 min
Sep 11, 12:46 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Wyoming	44 min
Sep 11, 1:33 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Wyoming	42 min
Sep 11, 1:34 PM EDT	Flash Flood Warning	BUF	Livingston, Wyoming	3 hr
Sep 11, 1:55 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	50 min
Sep 11, 2:04 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Wyoming	41 min
Sep 11, 2:46 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario	44 min
Sep 11, 4:31 PM EDT	Special Weather Statement	BUF	Chautauqua	59 min
Sep 11, 5:01 PM EDT	Special Weather Statement	BUF	Erie	59 min
Sep 11, 5:21 PM EDT	Areal Flood Advisory	BUF	Niagara	114 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.