Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 92, NWS Buffalo, NY

September 11, 20114 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 11, 2011, 12:46 PM EDT for 4 counties in New York. It was in force for 44 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, 12:46 PM EDT (16:46 UTC)
Expired: Sep 11, 2011, 1:30 PM EDT
In force: 44 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

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

The radar

The Buffalo radar (KBUF), 60 km from the middle of the area, began a volume at 16:50 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, 1:00 PM EDT	HAIL 1	4 E Attica, NY

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, 4.8 hours before the alert went out and 57 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.

411 
WUUS51 KBUF 111646
SVRBUF
NYC037-051-055-121-111730-
/O.NEW.KBUF.SV.W.0092.110911T1646Z-110911T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1246 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
  NORTH CENTRAL LIVINGSTON COUNTY IN WESTERN NEW YORK
  SOUTH CENTRAL MONROE COUNTY IN WESTERN NEW YORK
  NORTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 130 PM EDT

* AT 1241 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 10 MILES SOUTH OF BATAVIA TO   
  PAVILION TO 7 MILES NORTHWEST OF GENESEO...AND MOVING NORTHEAST AT
  10 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  WYOMING...
  YORK...
  LE ROY...
  BATAVIA...

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 4305 7817 4310 7785 4307 7763 4279 7784
      4277 7794 4281 7806 4278 7832
TIME...MOT...LOC 1646Z 209DEG 9KT 4287 7823 4290 7800
          4288 7790

$$

HIBBERT

1 follow-up statement

717 
WWUS51 KBUF 111723
SVSBUF

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

NYC055-111732-
/O.CAN.KBUF.SV.W.0092.000000T0000Z-110911T1730Z/
MONROE NY-
123 PM EDT SUN SEP 11 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MONROE COUNTY IS
CANCELLED...

THE STORMS HAVE SLOWED AND ARE NOT EXPECTED TO ENTER THE COUNTY.

LAT...LON 4281 7817 4293 7815 4300 7809 4298 7779
      4279 7790 4277 7794 4281 7806
TIME...MOT...LOC 1722Z 209DEG 9KT 4282 7810 4285 7803
          4284 7797 4281 7795

$$

NYC037-051-121-111730-
/O.CON.KBUF.SV.W.0092.000000T0000Z-110911T1730Z/
GENESEE NY-LIVINGSTON NY-WYOMING NY-
123 PM EDT SUN SEP 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR NORTHEASTERN WYOMING...NORTHWESTERN LIVINGSTON AND SOUTHEASTERN
GENESEE COUNTIES...

AT 117 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 WYOMING TO 7 MILES EAST OF 
WYOMING...MOVING NORTHEAST AT LESS THAN 10 MPH.

THESE STORMS PRODUCED 1 INCH HAIL IN THE TOWNSHIP OF MIDDLEBURY 
BETWEEN ATTICA AND WYOMING.

SOME LOCATIONS IN THE WARNING INCLUDE...
  PAVILION...

LAT...LON 4281 7817 4293 7815 4300 7809 4298 7779
      4279 7790 4277 7794 4281 7806
TIME...MOT...LOC 1722Z 209DEG 9KT 4282 7810 4285 7803
          4284 7797 4281 7795

$$

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, 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, 2:17 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Ontario, Wyoming	43 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.