Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 63, NWS Buffalo, NY

August 1, 2011Erie County, Genesee County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 1, 2011, 4:37 AM EDT for Erie County, Genesee County, Wyoming County, New York. It was in force for 53 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: Aug 1, 2011, 4:37 AM EDT (08:37 UTC)
Expired: Aug 1, 2011, 5:30 AM EDT
In force: 53 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Erie County, NY, Genesee County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 44 km from the middle of the area, began a volume at 08:39 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
Aug 1, 5:15 AM EDT	HAIL 0.5	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 00:00Z, 8.6 hours before the alert went out and 41 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: 1654 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1121 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

132 
WUUS51 KBUF 010837
SVRBUF
NYC029-037-121-010930-
/O.NEW.KBUF.SV.W.0063.110801T0837Z-110801T0930Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL ERIE COUNTY IN WESTERN NEW YORK
  SOUTHERN GENESEE COUNTY IN WESTERN NEW YORK
  NORTHERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 530 AM EDT

* AT 434 AM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
  NORTH OF DARIEN...OR 8 MILES WEST OF BATAVIA...AND MOVING SOUTHEAST
  AT 25 MPH. IN ADDITION VERY HEAVY RAINFALL IS OCCURRING WITH THESE 
  STORMS.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  DARIEN...
  ATTICA...
  WARSAW...
  PERRY...

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 4270 7852 4300 7862 4304 7797 4291 7794
      4290 7796 4272 7796
TIME...MOT...LOC 0835Z 319DEG 22KT 4298 7834

$$

THOMAS

2 follow-up statements

304 
WWUS51 KBUF 010900
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
500 AM EDT MON AUG 1 2011

NYC029-037-121-010930-
/O.CON.KBUF.SV.W.0063.000000T0000Z-110801T0930Z/
GENESEE NY-WYOMING NY-ERIE NY-
500 AM EDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 AM EDT
FOR EAST CENTRAL ERIE...NORTHERN WYOMING AND SOUTHERN GENESEE
COUNTIES...

AT 457 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ATTICA...OR 10 MILES SOUTH OF BATAVIA...MOVING SOUTHEAST
AT 25 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  WYOMING...

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 4270 7852 4300 7862 4304 7797 4291 7794
      4290 7796 4272 7796
TIME...MOT...LOC 0859Z 299DEG 20KT 4286 7818

$$

THOMAS

344 
WWUS51 KBUF 010926
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
526 AM EDT MON AUG 1 2011

NYC029-037-121-010935-
/O.EXP.KBUF.SV.W.0063.000000T0000Z-110801T0930Z/
GENESEE NY-WYOMING NY-ERIE NY-
526 AM EDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ERIE...NORTHERN
WYOMING AND SOUTHERN GENESEE COUNTIES WILL EXPIRE AT 530 AM EDT...

AT 525 AM 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 ALLOWED TO EXPIRE.

LAT...LON 4270 7852 4300 7862 4304 7797 4291 7794
      4290 7796 4272 7796
TIME...MOT...LOC 0925Z 299DEG 20KT 4279 7801

$$

THOMAS

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, 4:54 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, 2:35 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	45 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.