Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 81, NWS Buffalo, NY

August 21, 2011Cayuga County, Oswego County, Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 21, 2011, 2:50 PM EDT for Cayuga County, Oswego County, Wayne County, New York. It was in force for 55 min. 6 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 21, 2011, 2:50 PM EDT (18:50 UTC)
Expired: Aug 21, 2011, 3:45 PM EDT
In force: 55 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Cayuga County, NY, Oswego County, NY, Wayne County, NY

The radar

The Ft Drum radar (KTYX), 96 km from the middle of the area, began a volume at 18:52 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 21, 3:15 PM EDT	TSTM WND DMG	Savannah, NY	MULTIPLE HOMES WITH ROOFS RIPPED OFF.
Aug 21, 3:30 PM EDT	TSTM WND DMG	Cato, NY	MULTIPLE TREES AND WIRES DOWN.
Aug 21, 3:30 PM EDT	TSTM WND DMG	Conquest, NY	MULTIPLE TREES AND WIRES DOWN.
Aug 21, 3:30 PM EDT	TSTM WND DMG	Savannah, NY	MULTIPLE HOMES WITH ROOFS RIPPED OFF.
Aug 21, 3:30 PM EDT	HAIL 1.25	Meridian, NY	MULTIPLE REPORTS OF HAIL IN THE TOWN OF MERIDIAN.
Aug 21, 3:40 PM EDT	TSTM WND DMG	Cato, NY	MULTIPLE TREES AND WIRES DOWN.

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, 6.8 hours before the alert went out and 173 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: 390 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 73 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.

695 
WUUS51 KBUF 211850
SVRBUF
NYC011-075-117-211945-
/O.NEW.KBUF.SV.W.0081.110821T1850Z-110821T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
250 PM EDT SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 345 PM EDT

* AT 248 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 6 MILES
  SOUTHEAST OF SODUS...OR 17 MILES NORTHWEST OF MONTEZUMA...AND
  MOVING EAST AT 30 MPH.

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

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 4320 7629 4323 7630 4322 7647 4311 7647
      4310 7649 4306 7650 4303 7713 4304 7714
      4329 7708 4328 7694 4332 7679 4338 7667
      4345 7628 4321 7620
TIME...MOT...LOC 1850Z 257DEG 27KT 4318 7695

$$

JJR

1 follow-up statement

879 
WWUS51 KBUF 211917
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
317 PM EDT SUN AUG 21 2011

NYC011-075-117-211945-
/O.CON.KBUF.SV.W.0081.000000T0000Z-110821T1945Z/
WAYNE NY-OSWEGO NY-CAYUGA NY-
317 PM EDT SUN AUG 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHWESTERN CAYUGA...SOUTHWESTERN OSWEGO AND EASTERN WAYNE
COUNTIES...

AT 314 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 RED CREEK...OR 14 MILES NORTH OF MONTEZUMA...MOVING EAST
AT 30 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  IRA...
  FULTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...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 4320 7629 4323 7630 4322 7647 4311 7647
      4310 7649 4306 7650 4305 7697 4328 7694
      4332 7679 4338 7667 4345 7628 4321 7620
TIME...MOT...LOC 1917Z 257DEG 27KT 4322 7668

$$

TJP

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 3:36 AM EDT	Special Weather Statement	BUF	Erie	39 min
Aug 21, 5:08 AM EDT	Special Weather Statement	BUF	Genesee, Monroe, Orleans	67 min
Aug 21, 11:39 AM EDT	Special Weather Statement	BUF	Erie, Genesee	66 min
Aug 21, 12:08 PM EDT	Special Marine Warning	BUF		52 min
Aug 21, 12:09 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Wyoming	51 min
Aug 21, 12:27 PM EDT	Special Weather Statement	BUF	Cattaraugus, Chautauqua, Erie, Genesee, Monroe, Orleans and 1 more	63 min
Aug 21, 1:03 PM EDT	Special Weather Statement	BUF	Chautauqua	57 min
Aug 21, 1:42 PM EDT	Special Weather Statement	BUF	Livingston, Wyoming	63 min
Aug 21, 2:11 PM EDT	Special Marine Warning	BUF		64 min
Aug 21, 2:15 PM EDT	Special Marine Warning	BUF		79 min
Aug 21, 2:29 PM EDT	Special Weather Statement	BUF	Allegany, Livingston	61 min
Aug 21, 3:13 PM EDT	Special Marine Warning	BUF		62 min
Aug 21, 3:25 PM EDT	Tornado Warning	BUF	Cayuga, Wayne	35 min
Aug 21, 4:02 PM EDT	Small Craft Advisory	BUF		36 hr
Aug 21, 4:17 PM EDT	Special Marine Warning	BUF		58 min
Aug 21, 4:35 PM EDT	Special Marine Warning	BUF		55 min
Aug 21, 4:44 PM EDT	Special Weather Statement	BUF	Monroe	61 min
Aug 21, 5:23 PM EDT	Special Marine Warning	BUF		52 min
Aug 21, 6:27 PM EDT	Special Marine Warning	BUF		33 min
Aug 21, 6:28 PM EDT	Special Weather Statement	BUF	Erie, Genesee, Wyoming	62 min
Aug 21, 6:34 PM EDT	Special Weather Statement	BUF	Oswego	56 min
Aug 21, 6:48 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	57 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.