Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 8, NWS Buffalo, NY

April 26, 2011Allegany County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Apr 26, 2011, 6:22 PM EDT for Allegany County, New York. It was in force for 38 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: Apr 26, 2011, 6:22 PM EDT (22:22 UTC)
Expired: Apr 26, 2011, 7:00 PM EDT
In force: 38 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Allegany County, NY

The radar

The Buffalo radar (KBUF), 109 km from the middle of the area, began a volume at 22:24 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
Apr 26, 6:29 PM EDT	HAIL 1	2 Nnw Wellsville, NY

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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, 10.4 hours before the alert went out and 106 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.

796 
WUUS51 KBUF 262222
SVRBUF
NYC003-262300-
/O.NEW.KBUF.SV.W.0008.110426T2222Z-110426T2300Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 700 PM EDT

* AT 619 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR WELLSVILLE...AND
  MOVING NORTHEAST AT 45 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4200 7797 4208 7810 4248 7781 4247 7771
      4213 7774
TIME...MOT...LOC 2222Z 217DEG 38KT 4210 7794

$$

APFFEL

3 follow-up statements

327 
WWUS51 KBUF 262226
SVSBUF

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

NYC003-262300-
/O.CON.KBUF.SV.W.0008.000000T0000Z-110426T2300Z/
ALLEGANY NY-
626 PM EDT TUE APR 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR EASTERN ALLEGANY COUNTY...

AT 626 PM 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 WELLSVILLE...MOVING NORTHEAST AT 45 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  ANDOVER...
  ALFRED...
  ALMOND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4209 7807 4248 7781 4247 7771 4213 7774
      4202 7795
TIME...MOT...LOC 2226Z 217DEG 38KT 4212 7790

$$

APFFEL

173 
WWUS51 KBUF 262247
SVSBUF

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

NYC003-262300-
/O.CON.KBUF.SV.W.0008.000000T0000Z-110426T2300Z/
ALLEGANY NY-
647 PM EDT TUE APR 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR EAST CENTRAL ALLEGANY COUNTY...

AT 643 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 
MPH. THIS STORM WAS LOCATED NEAR ALFRED...OR 6 MILES SOUTHWEST OF 
HORNELL...MOVING NORTHEAST AT 45 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4217 7782 4225 7792 4248 7781 4247 7771
      4213 7774
TIME...MOT...LOC 2247Z 217DEG 38KT 4230 7772

$$

APFFEL

677 
WWUS51 KBUF 262258
SVSBUF

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

NYC003-262309-
/O.EXP.KBUF.SV.W.0008.000000T0000Z-110426T2300Z/
ALLEGANY NY-
658 PM EDT TUE APR 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ALLEGANY COUNTY
WILL EXPIRE AT 700 PM EDT...

AT 659 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 4217 7782 4225 7792 4248 7781 4247 7771
      4213 7774
TIME...MOT...LOC 2259Z 217DEG 38KT 4240 7762

$$

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, 5:40 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, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.