Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 66, NWS Buffalo, NY

August 1, 2011Livingston County, Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 1, 2011, 2:35 PM EDT for Livingston County, Ontario County, New York. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 1, 2011, 2:35 PM EDT (18:35 UTC)
Expired: Aug 1, 2011, 3:20 PM EDT
In force: 45 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 108 km from the middle of the area, began a volume at 18:37 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.6 hours before the alert went out and 105 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: 2422 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 692 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.2

Open this sounding in Storm Lab

The text

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

069 
WUUS51 KBUF 011835
SVRBUF
NYC051-069-011930-
/O.NEW.KBUF.SV.W.0066.110801T1835Z-110801T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
235 PM EDT MON AUG 1 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL LIVINGSTON COUNTY IN WESTERN NEW YORK
  SOUTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK

* UNTIL 330 PM EDT

* AT 232 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. 
  THE STORMS WERE LOCATED NEAR LIVONIA AND NEAR HONEOYE AND WERE
  MOVING SOUTHEAST AT 20 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4283 7776 4294 7762 4276 7726 4276 7731
      4272 7734 4267 7735 4266 7736 4258 7735
      4257 7737 4257 7741
TIME...MOT...LOC 1834Z 312DEG 17KT 4278 7747

$$

LEVAN

2 follow-up statements

380 
WWUS51 KBUF 011856
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
256 PM EDT MON AUG 1 2011

NYC051-011906-
/O.CAN.KBUF.SV.W.0066.000000T0000Z-110801T1930Z/
LIVINGSTON NY-
256 PM EDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LIVINGSTON COUNTY
IS CANCELLED...

LAT...LON 4260 7743 4272 7756 4282 7757 4276 7728
      4277 7727 4276 7726 4276 7731 4267 7736
      4258 7736 4257 7737
TIME...MOT...LOC 1856Z 312DEG 17KT 4271 7737

$$

NYC069-011930-
/O.CON.KBUF.SV.W.0066.000000T0000Z-110801T1930Z/
ONTARIO NY-
256 PM EDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHWESTERN ONTARIO COUNTY...

AT 249 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR BRISTOL MOUNTAIN...OR 7 MILES WEST
OF MIDDLESEX...MOVING SOUTHEAST AT 20 MPH.


LAT...LON 4260 7743 4272 7756 4282 7757 4276 7728
      4277 7727 4276 7726 4276 7731 4267 7736
      4258 7736 4257 7737
TIME...MOT...LOC 1856Z 312DEG 17KT 4271 7737

$$

NIZIOL

276 
WWUS51 KBUF 011920
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
320 PM EDT MON AUG 1 2011

NYC069-011930-
/O.CAN.KBUF.SV.W.0066.000000T0000Z-110801T1930Z/
ONTARIO NY-
320 PM EDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ONTARIO COUNTY IS
CANCELLED...

AT 320 PM EDT 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 CANCELLED.

LAT...LON 4260 7743 4272 7756 4282 7757 4276 7728
      4277 7727 4276 7726 4276 7731 4267 7736
      4258 7736 4257 7737
TIME...MOT...LOC 1920Z 312DEG 17KT 4263 7726

$$

JJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 2:25 AM EDT	Special Marine Warning	BUF		80 min
Aug 1, 2:50 AM EDT	Special Weather Statement	BUF	Orleans	70 min
Aug 1, 3:26 AM EDT	Severe Thunderstorm Warning	BUF	Niagara, Orleans	49 min
Aug 1, 3:56 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Orleans	64 min
Aug 1, 4:25 AM EDT	Special Marine Warning	BUF		25 min
Aug 1, 4:37 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	53 min
Aug 1, 4:54 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Monroe, Niagara, Orleans	66 min
Aug 1, 5:16 AM EDT	Areal Flood Advisory	BUF	Genesee, Orleans	3 hr
Aug 1, 5:45 AM EDT	Special Weather Statement	BUF	Wyoming	45 min
Aug 1, 6:06 AM EDT	Special Weather Statement	BUF	Allegany	54 min
Aug 1, 6:21 AM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Wyoming	36 min
Aug 1, 6:47 AM EDT	Special Weather Statement	BUF	Wyoming	43 min
Aug 1, 3:07 PM EDT	Special Weather Statement	BUF	Niagara	53 min
Aug 1, 3:57 PM EDT	Areal Flood Advisory	BUF	Ontario	21 min
Aug 1, 4:12 PM EDT	Flash Flood Warning	BUF	Livingston, Ontario	93 min
Aug 1, 6:06 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	39 min
Aug 1, 6:12 PM EDT	Special Weather Statement	BUF	Genesee, Livingston	63 min
Aug 1, 6:42 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Wyoming	63 min
Aug 1, 6:46 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus	59 min
Aug 1, 7:09 PM EDT	Special Weather Statement	BUF	Wyoming	36 min
Aug 1, 7:44 PM EDT	Special Weather Statement	BUF	Wyoming	46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.