Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 70, NWS Buffalo, NY

August 7, 2011Wayne County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Aug 7, 2011, 2:34 PM EDT for Wayne County, New York. It was in force for 41 min. 4 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 7, 2011, 2:34 PM EDT (18:34 UTC)
Expired: Aug 7, 2011, 3:15 PM EDT
In force: 41 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Wayne County, NY

The radar

The Ft Drum radar (KTYX), 127 km from the middle of the area, began a volume at 18:34 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 7, 3:10 PM EDT	TSTM WND DMG	Clyde, NY	TREES AND WIRES DOWN
Aug 7, 3:10 PM EDT	HAIL 0.75	Clyde, NY	HAIL LASTED 5 MINUTES
Aug 7, 3:20 PM EDT	TSTM WND DMG	Clyde, NY	TREE FELL ON HOUSE.
Aug 7, 3:25 PM EDT	TSTM WND DMG	Savannah, NY	NUMEROUS 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, 6.6 hours before the alert went out and 141 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: 309 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

802 
WUUS51 KBUF 071834
SVRBUF
NYC117-071915-
/O.NEW.KBUF.SV.W.0070.110807T1834Z-110807T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
234 PM EDT SUN AUG 7 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

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

* UNTIL 315 PM EDT

* AT 229 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
  MARION...OR 17 MILES EAST OF WEBSTER...AND MOVING EAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  MARION...
  LYONS...
  CLYDE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

&&

LAT...LON 4305 7707 4308 7715 4324 7718 4322 7671
      4302 7672
TIME...MOT...LOC 1834Z 280DEG 20KT 4314 7707

$$

HIBBERT

1 follow-up statement

965 
WWUS51 KBUF 071855
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
255 PM EDT SUN AUG 7 2011

NYC117-071915-
/O.CON.KBUF.SV.W.0070.000000T0000Z-110807T1915Z/
WAYNE NY-
255 PM EDT SUN AUG 7 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR EASTERN WAYNE COUNTY...

AT 253 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 LYONS...OR 16 MILES NORTHWEST OF MONTEZUMA...MOVING EAST
AT 20 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  CLYDE...

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.

&&

LAT...LON 4305 7707 4308 7715 4324 7704 4322 7671
      4302 7672
TIME...MOT...LOC 1855Z 289DEG 16KT 4312 7699

$$

APFFEL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 7:52 AM EDT	Special Weather Statement	BUF	Chautauqua	53 min
Aug 7, 12:21 PM EDT	Special Marine Warning	BUF		54 min
Aug 7, 12:23 PM EDT	Special Weather Statement	BUF	Livingston	52 min
Aug 7, 12:50 PM EDT	Special Weather Statement	BUF	Livingston	55 min
Aug 7, 12:53 PM EDT	Special Weather Statement	BUF	Niagara	52 min
Aug 7, 1:41 PM EDT	Special Weather Statement	BUF	Wayne	49 min
Aug 7, 1:50 PM EDT	Areal Flood Advisory	BUF	Erie, Niagara	109 min
Aug 7, 2:44 PM EDT	Areal Flood Advisory	BUF	Monroe, Wayne	104 min
Aug 7, 3:13 PM EDT	Tornado Warning	BUF	Wayne	32 min
Aug 7, 3:35 PM EDT	Tornado Warning	BUF	Wayne	25 min
Aug 7, 3:37 PM EDT	Small Craft Advisory	BUF		12 hr
Aug 7, 4:16 PM EDT	Areal Flood Advisory	BUF	Cayuga, Wayne	76 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.