Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 64, NWS Buffalo, NY

August 1, 20115 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 1, 2011, 4:54 AM EDT for 5 counties in New York. It was in force for 66 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, 4:54 AM EDT (08:54 UTC)
Expired: Aug 1, 2011, 6:00 AM EDT
In force: 66 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Erie County, NY, Genesee County, NY, Monroe County, NY, Niagara County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 48 km from the middle of the area, began a volume at 08:57 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 00:00Z, 8.9 hours before the alert went out and 47 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.

992 
WUUS51 KBUF 010854
SVRBUF
NYC029-037-055-063-073-011000-
/O.NEW.KBUF.SV.W.0064.110801T0854Z-110801T1000Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN ERIE COUNTY IN WESTERN NEW YORK
  NORTHERN GENESEE COUNTY IN WESTERN NEW YORK
  WESTERN MONROE COUNTY IN WESTERN NEW YORK
  EASTERN NIAGARA COUNTY IN WESTERN NEW YORK
  ORLEANS COUNTY IN WESTERN NEW YORK

* UNTIL 600 AM EDT

* AT 448 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 NEAR
  MEDINA...AND MOVING SOUTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  OAKFIELD...
  BYRON...

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 4338 7858 4339 7808 4337 7797 4303 7779
      4298 7861 4324 7862
TIME...MOT...LOC 0853Z 311DEG 28KT 4323 7838

$$

THOMAS

2 follow-up statements

798 
WWUS51 KBUF 010930
SVSBUF

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

NYC029-063-010940-
/O.CAN.KBUF.SV.W.0064.000000T0000Z-110801T1000Z/
NIAGARA NY-ERIE NY-
530 AM EDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ERIE AND EASTERN
NIAGARA COUNTIES IS CANCELLED...

LAT...LON 4328 7845 4328 7797 4303 7779 4299 7845
      4320 7845
TIME...MOT...LOC 0930Z 301DEG 19KT 4312 7815

$$

NYC037-055-073-011000-
/O.CON.KBUF.SV.W.0064.000000T0000Z-110801T1000Z/
GENESEE NY-ORLEANS NY-MONROE NY-
530 AM EDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 AM EDT
FOR WEST CENTRAL MONROE...SOUTHERN ORLEANS AND NORTHERN GENESEE
COUNTIES...

AT 525 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 ELBA...OR 8 MILES SOUTH OF ALBION...MOVING SOUTHEAST AT
20 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  BYRON...
  BERGEN...

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 4328 7845 4328 7797 4303 7779 4299 7845
      4320 7845
TIME...MOT...LOC 0930Z 301DEG 19KT 4312 7815

$$

THOMAS

903 
WWUS51 KBUF 010957
SVSBUF

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

NYC037-055-073-011007-
/O.EXP.KBUF.SV.W.0064.000000T0000Z-110801T1000Z/
GENESEE NY-ORLEANS NY-MONROE NY-
557 AM EDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MONROE...SOUTHERN
ORLEANS AND NORTHERN GENESEE COUNTIES WILL EXPIRE AT 600 AM EDT...

AT 557 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.

RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS WERE
STILL POSSIBLE FROM THE THUNDERSTORM.

LAT...LON 4328 7845 4328 7797 4303 7779 4299 7845
      4320 7845
TIME...MOT...LOC 0957Z 309DEG 16KT 4307 7808

$$

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, 4:37 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	53 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.