Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 79, NWS Buffalo, NY

August 19, 2011Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 19, 2011, 1:15 PM EDT for Wyoming County, New York. It was in force for 45 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: Aug 19, 2011, 1:15 PM EDT (17:15 UTC)
Expired: Aug 19, 2011, 2:00 PM EDT
In force: 45 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Wyoming County, NY

The radar

The Buffalo radar (KBUF), 52 km from the middle of the area, began a volume at 17:18 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 19, 1:50 PM EDT	HAIL 0.75	1 Nw Perry, NY	TRAINED SPOTTER REPORTED DIME-SIZED HAIL COVERING THE GROUND.

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 12:00Z, 5.3 hours before the alert went out and 49 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: 551 J/kg
Mixed-layer CIN: -37 J/kg
Mixed-layer LCL: 1064 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

273 
WUUS51 KBUF 191715
SVRBUF
NYC121-191800-
/O.NEW.KBUF.SV.W.0079.110819T1715Z-110819T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
115 PM EDT FRI AUG 19 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 200 PM EDT

* AT 114 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 NEAR
  VARYSBURG...OR 17 MILES EAST OF EAST AURORA...AND MOVING EAST AT 20
  MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  WARSAW...
  PERRY...

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 4278 7841 4285 7796 4267 7796 4261 7799
      4259 7837
TIME...MOT...LOC 1716Z 262DEG 18KT 4270 7829

$$

JJR

2 follow-up statements

377 
WWUS51 KBUF 191737
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
137 PM EDT FRI AUG 19 2011

NYC121-191800-
/O.CON.KBUF.SV.W.0079.000000T0000Z-110819T1800Z/
WYOMING NY-
137 PM EDT FRI AUG 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR CENTRAL WYOMING COUNTY...

AT 128 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 THE TOWN OF WYOMING. ANOTHER STORM WAS DEVELOPING ABOUT 
5 MILES WEST OF VARYSBURG.  THE ACTIVITY WAS MOVING EAST AT 10 TO 15 
MPH. 

LAT...LON 4278 7841 4285 7796 4267 7796 4261 7799
      4259 7837
TIME...MOT...LOC 1736Z 251DEG 32KT 4280 7796

$$

NIZIOL

576 
WWUS51 KBUF 191756
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
156 PM EDT FRI AUG 19 2011

NYC121-191805-
/O.EXP.KBUF.SV.W.0079.000000T0000Z-110819T1800Z/
WYOMING NY-
156 PM EDT FRI AUG 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WYOMING COUNTY WILL
EXPIRE AT 200 PM EDT...

THE STORMS THAT PROMPTED THE WARNING HAVE MOVED EAST OF THE REGION. 

LAT...LON 4278 7841 4285 7796 4267 7796 4261 7799
      4259 7837
TIME...MOT...LOC 1755Z 251DEG 32KT 4285 7774

$$

NIZIOL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 12:13 AM EDT	Special Weather Statement	BUF	Cattaraugus	62 min
Aug 19, 12:59 AM EDT	Special Weather Statement	BUF	Cattaraugus	61 min
Aug 19, 12:08 PM EDT	Areal Flood Advisory	BUF	Allegany	3 hr
Aug 19, 12:10 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	65 min
Aug 19, 12:39 PM EDT	Flash Flood Warning	BUF	Allegany	110 min
Aug 19, 2:20 PM EDT	Special Weather Statement	BUF	Livingston	55 min
Aug 19, 3:50 PM EDT	Special Weather Statement	BUF	Allegany	55 min
Aug 19, 3:51 PM EDT	Special Weather Statement	BUF	Allegany	54 min
Aug 19, 4:06 PM EDT	Areal Flood Advisory	BUF	Allegany	119 min
Aug 19, 5:55 PM EDT	Special Weather Statement	BUF	Ontario	65 min
Aug 19, 6:23 PM EDT	Areal Flood Advisory	BUF	Livingston, Ontario	97 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.