Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 1, NWS Buffalo, NY

April 26, 2011Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Apr 26, 2011, 2:00 PM EDT for 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: Apr 26, 2011, 2:00 PM EDT (18:00 UTC)
Expired: Apr 26, 2011, 2:45 PM EDT
In force: 45 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Ontario County, NY

The radar

The Binghamton radar (KBGM), 122 km from the middle of the area, began a volume at 18:03 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, 6.0 hours before the alert went out and 125 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.

497 
WUUS51 KBUF 261800
SVRBUF
NYC069-261845-
/O.NEW.KBUF.SV.W.0001.110426T1800Z-110426T1845Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN ONTARIO COUNTY IN WESTERN NEW YORK

* UNTIL 245 PM EDT

* AT 158 PM 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 10
  MILES SOUTHEAST OF CANANDAIGUA...OR 7 MILES NORTHEAST OF
  MIDDLESEX...AND MOVING NORTHEAST AT 40 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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

&&

LAT...LON 4275 7743 4303 7722 4303 7713 4301 7713
      4301 7695 4287 7695 4286 7697 4276 7697
      4276 7731 4271 7734
TIME...MOT...LOC 1800Z 229DEG 33KT 4278 7715

$$

HIBBERT

2 follow-up statements

225 
WWUS51 KBUF 261819
SVSBUF

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

NYC069-261845-
/O.CON.KBUF.SV.W.0001.000000T0000Z-110426T1845Z/
ONTARIO NY-
219 PM EDT TUE APR 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR NORTHEASTERN ONTARIO COUNTY...

AT 216 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR GENEVA...MOVING NORTHEAST AT 40 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  RURAL ONTARIO COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

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

&&

LAT...LON 4296 7718 4303 7713 4301 7713 4301 7695
      4287 7695 4286 7697 4284 7702
TIME...MOT...LOC 1819Z 229DEG 33KT 4289 7697

$$

HIBBERT

001 
WWUS51 KBUF 261838
SVSBUF

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

NYC069-261848-
/O.EXP.KBUF.SV.W.0001.000000T0000Z-110426T1845Z/
ONTARIO NY-
238 PM EDT TUE APR 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ONTARIO COUNTY
WILL EXPIRE AT 245 PM EDT...

AT 238 PM 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.

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

LAT...LON 4296 7718 4303 7713 4301 7713 4301 7695
      4287 7695 4286 7697 4284 7702
TIME...MOT...LOC 1838Z 229DEG 33KT 4301 7679

$$

HIBBERT

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, 2:26 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, 5:40 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	50 min
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.