Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 94, NWS Buffalo, NY

September 11, 2011Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Sep 11, 2011, 1:55 PM EDT for Ontario County, New York. It was in force for 50 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, 1:55 PM EDT (17:55 UTC)
Expired: Sep 11, 2011, 2:45 PM EDT
In force: 50 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Ontario County, NY

The radar

The Buffalo radar (KBUF), 113 km from the middle of the area, began a volume at 17:59 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 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, 5.9 hours before the alert went out and 110 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.

317 
WUUS51 KBUF 111755
SVRBUF
NYC069-111845-
/O.NEW.KBUF.SV.W.0094.110911T1755Z-110911T1845Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ONTARIO COUNTY IN WESTERN NEW YORK

* UNTIL 245 PM EDT

* AT 150 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BRISTOL...OR 9 MILES SOUTHWEST OF CANANDAIGUA...AND MOVING
  NORTHEAST AT 10 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  BRISTOL...
  CANANDAIGUA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. 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 4270 7747 4285 7759 4285 7756 4288 7755
      4304 7721 4276 7710 4275 7715 4275 7728
      4276 7731 4272 7734
TIME...MOT...LOC 1755Z 233DEG 7KT 4283 7742

$$

HIBBERT

1 follow-up statement

266 
WWUS51 KBUF 111814
SVSBUF

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

NYC069-111845-
/O.CON.KBUF.SV.W.0094.000000T0000Z-110911T1845Z/
ONTARIO NY-
214 PM EDT SUN SEP 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR CENTRAL ONTARIO COUNTY...

AT 213 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 HOLCOMB TO GORHAM...OR ALONG
A LINE EXTENDING FROM CANANDAIGUA TO 8 MILES SOUTHEAST OF
CANANDAIGUA...MOVING NORTHEAST AT 10 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  GORHAM...
  CANANDAIGUA...
  SHORTSVILLE...

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 4272 7734 4290 7749 4304 7721 4276 7710
      4275 7715 4275 7728 4276 7731
TIME...MOT...LOC 1814Z 233DEG 7KT 4289 7737 4281 7716

$$

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, 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.