Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 7, NWS Buffalo, NY

April 26, 2011Cayuga County, Ontario County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Apr 26, 2011, 5:40 PM EDT for Cayuga County, Ontario County, Wayne County, New York. It was in force for 50 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: Apr 26, 2011, 5:40 PM EDT (21:40 UTC)
Expired: Apr 26, 2011, 6:30 PM EDT
In force: 50 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Cayuga County, NY, Ontario County, NY, Wayne County, NY

The radar

The Binghamton radar (KBGM), 125 km from the middle of the area, began a volume at 21:40 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 26, 1:49 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.7 hours before the alert went out and 136 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: 493 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

305 
WUUS51 KBUF 262140
SVRBUF
NYC011-069-117-262230-
/O.NEW.KBUF.SV.W.0007.110426T2140Z-110426T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
540 PM EDT TUE APR 26 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CAYUGA COUNTY IN CENTRAL NEW YORK
  EASTERN ONTARIO COUNTY IN WESTERN NEW YORK
  WAYNE COUNTY IN WESTERN NEW YORK

* UNTIL 630 PM EDT

* AT 535 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS       
  WERE LOCATED ALONG A LINE EXTENDING FROM WILLIAMSON TO CANANDAIGUA 
  TO COHOCTON...AND MOVING NORTHEAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  SODUS...
  NEWARK...
  PHELPS...
  LYONS...
  GENEVA...
  CLYDE...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4257 7742 4263 7738 4274 7743 4307 7725
      4329 7724 4328 7695 4330 7691 4337 7695
      4330 7687 4335 7670 4343 7662 4339 7661
      4318 7672 4307 7667 4302 7672 4301 7695
      4276 7697 4276 7731 4266 7736 4258 7735
TIME...MOT...LOC 2139Z 230DEG 32KT 4329 7716 4313 7715
          4296 7725 4280 7733 4269 7728 4254 7741
          4249 7739

$$

JJR

2 follow-up statements

645 
WWUS51 KBUF 262215
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
615 PM EDT TUE APR 26 2011

NYC011-069-117-262230-
/O.CON.KBUF.SV.W.0007.000000T0000Z-110426T2230Z/
ONTARIO NY-WAYNE NY-CAYUGA NY-
615 PM EDT TUE APR 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHWESTERN CAYUGA...EASTERN WAYNE AND EASTERN ONTARIO
COUNTIES...

AT 609 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 PORT BAY TO GENEVA TO SOUTH 
OF GORHAM...MOVING NORTHEAST AT 35 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  WOLCOTT...
  FAIR HAVEN...

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4277 7731 4327 7697 4330 7691 4335 7670
      4343 7662 4338 7661 4319 7672 4306 7668
      4302 7673 4301 7695 4277 7697 4275 7730
      4265 7737 4258 7735 4257 7741
TIME...MOT...LOC 2214Z 230DEG 32KT 4349 7683 4333 7682
          4316 7692 4300 7700 4289 7695 4274 7709
          4269 7707

$$

JJR

515 
WWUS51 KBUF 262229
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
629 PM EDT TUE APR 26 2011

NYC011-069-117-262239-
/O.EXP.KBUF.SV.W.0007.000000T0000Z-110426T2230Z/
ONTARIO NY-WAYNE NY-CAYUGA NY-
629 PM EDT TUE APR 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CAYUGA...EASTERN
WAYNE AND EASTERN ONTARIO COUNTIES WILL EXPIRE AT 630 PM EDT...

AT 629 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE 
THUNDERSTORMS THAT PROMPTED THE WARNING HAD WEAKENED AND WERE NO 
LONGER SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

LAT...LON 4277 7731 4327 7697 4330 7691 4335 7670
      4343 7662 4338 7661 4319 7672 4306 7668
      4302 7673 4301 7695 4277 7697 4275 7730
      4265 7737 4258 7735 4257 7741
TIME...MOT...LOC 2229Z 230DEG 32KT 4358 7669 4342 7668
          4325 7678 4309 7686 4298 7681 4283 7695
          4278 7693

$$

JJR

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 8:36 PM EDT	Areal Flood Advisory	BUF	Chautauqua, Erie, Genesee	6 hr
Apr 26, 3:07 AM EDT	River Flood Warning	BUF	Erie, Wyoming	3 hr
Apr 26, 3:07 AM EDT	River Flood Warning	BUF	Erie	3 hr
Apr 26, 3:41 AM EDT	Small Craft Advisory	BUF		18 hr
Apr 26, 12:59 PM EDT	Special Weather Statement	BUF	Allegany	31 min
Apr 26, 2:00 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	45 min
Apr 26, 2:26 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Oswego, Wayne	49 min
Apr 26, 3:53 PM EDT	Special Weather Statement	BUF	Oswego	52 min
Apr 26, 4:43 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Monroe, Orleans	47 min
Apr 26, 4:44 PM EDT	Severe Thunderstorm Warning	BUF	Monroe	46 min
Apr 26, 4:50 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	55 min
Apr 26, 4:53 PM EDT	Special Marine Warning	BUF		58 min
Apr 26, 5:05 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	40 min
Apr 26, 5:27 PM EDT	Flash Flood Warning	BUF	Allegany	5 hr
Apr 26, 5:46 PM EDT	Special Weather Statement	BUF	Lewis	59 min
Apr 26, 5:49 PM EDT	Special Marine Warning	BUF		86 min
Apr 26, 6:14 PM EDT	Special Weather Statement	BUF	Allegany	61 min
Apr 26, 6:19 PM EDT	Areal Flood Advisory	BUF	Ontario, Wayne	2 hr
Apr 26, 6:22 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	38 min
Apr 26, 7:10 PM EDT	Flash Flood Warning	BUF	Ontario, Wayne	3 hr

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.