Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 61, NWS Buffalo, NY

August 1, 2011Niagara County, Orleans County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 1, 2011, 3:26 AM EDT for Niagara County, Orleans County, New York. It was in force for 49 min. 5 reports 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, 3:26 AM EDT (07:26 UTC)
Expired: Aug 1, 2011, 4:15 AM EDT
In force: 49 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Niagara County, NY, Orleans County, NY

The radar

The Buffalo radar (KBUF), 44 km from the middle of the area, began a volume at 07:25 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, 3:30 AM EDT	HAIL 0.75	Lyndonville, NY	HAIL REPORT.
Aug 1, 3:40 AM EDT	HAIL 1	Lyndonville, NY
Aug 1, 3:44 AM EDT	HAIL 1	Gaines, NY	QUARTER SIZED HAIL
Aug 1, 3:50 AM EDT	HAIL 0.5	Medina, NY	HEAVY DAMAGE... FRUIT TREES.
Aug 1, 3:55 AM EDT	HAIL 1	Medina, 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, 7.4 hours before the alert went out and 46 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.

047 
WUUS51 KBUF 010726
SVRBUF
NYC063-073-010815-
/O.NEW.KBUF.SV.W.0061.110801T0726Z-110801T0815Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN NIAGARA COUNTY IN WESTERN NEW YORK
  NORTHWESTERN ORLEANS COUNTY IN WESTERN NEW YORK

* UNTIL 415 AM EDT

* AT 321 AM 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 13
  MILES NORTHWEST OF WATERPORT...OR 14 MILES NORTH OF MEDINA...AND
  MOVING SOUTH AT 15 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  MIDDLEPORT...

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 4335 7868 4337 7863 4338 7854 4338 7826
      4323 7817 4318 7868 4335 7873
TIME...MOT...LOC 0726Z 007DEG 12KT 4340 7848

$$

APFFEL

2 follow-up statements

028 
WWUS51 KBUF 010745
SVSBUF

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

NYC063-073-010815-
/O.CON.KBUF.SV.W.0061.000000T0000Z-110801T0815Z/
NIAGARA NY-ORLEANS NY-
345 AM EDT MON AUG 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 AM EDT
FOR NORTHWESTERN ORLEANS AND NORTHEASTERN NIAGARA COUNTIES...

AT 339 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 LYNDONVILLE...OR 6 MILES NORTHWEST OF MEDINA...MOVING 
SOUTHWEST AT 15 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  BARKER...
  MIDDLEPORT...
  GASPORT...

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 4335 7868 4337 7863 4338 7854 4338 7826
      4323 7817 4318 7868 4335 7873
TIME...MOT...LOC 0744Z 058DEG 14KT 4328 7847

$$

APFFEL

656 
WWUS51 KBUF 010811
SVSBUF

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

NYC063-073-010821-
/O.EXP.KBUF.SV.W.0061.000000T0000Z-110801T0815Z/
NIAGARA NY-ORLEANS NY-
411 AM EDT MON AUG 1 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ORLEANS AND
NORTHEASTERN NIAGARA COUNTIES WILL EXPIRE AT 415 AM EDT...

AT 411 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED 
AREA...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE. 

LAT...LON 4335 7868 4337 7863 4338 7854 4338 7826
      4323 7817 4318 7868 4335 7873
TIME...MOT...LOC 0811Z 058DEG 14KT 4322 7859

$$

APFFEL

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, 3:56 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, 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.