Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 39, NWS Buffalo, NY

June 12, 2015Allegany County, Livingston County, Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 12, 2015, 5:40 PM EDT for Allegany County, Livingston County, Ontario County, New York. It was in force for 35 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: Jun 12, 2015, 5:40 PM EDT (21:40 UTC)
Expired: Jun 12, 2015, 6:15 PM EDT
In force: 35 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Allegany County, NY, Livingston County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 102 km from the middle of the area, began a volume at 21:40 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
Jun 12, 5:48 PM EDT	TSTM WND DMG	Alfred, NY	TREES AND WIRES DOWN

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
Jun 12, 2:54 PM EDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 12, 3:07 PM EDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.7 hours before the alert went out and 99 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: 1195 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 215 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.

178 
WUUS51 KBUF 122140
SVRBUF
NYC003-051-069-122215-
/O.NEW.KBUF.SV.W.0039.150612T2140Z-150612T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
540 PM EDT FRI JUN 12 2015

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK...
  SOUTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
  EASTERN ALLEGANY COUNTY IN WESTERN NEW YORK...

* UNTIL 615 PM EDT

* AT 540 PM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 7 MILES
  SOUTHWEST OF DANSVILLE TO NEAR WELLSVILLE...AND MOVING EAST AT 55
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  DANSVILLE...WELLSVILLE...ALFRED...NAPLES...WHITESVILLE...SCIO...
  ANDOVER AND BELMONT.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 390 BETWEEN EXITS 4 AND 5.
 INTERSTATE 86 BETWEEN EXITS 31 AND 33.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE. THIS IS A VERY
DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS.
 
&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT FOR WESTERN NEW
YORK.

LAT...LON 4200 7813 4256 7798 4266 7737 4258 7737
      4258 7766 4253 7766 4253 7772 4200 7775
TIME...MOT...LOC 2140Z 262DEG 50KT 4250 7781 4212 7785 

$$

WOOD

1 follow-up statement

649 
WWUS51 KBUF 122207
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
607 PM EDT FRI JUN 12 2015

NYC003-051-069-122216-
/O.EXP.KBUF.SV.W.0039.000000T0000Z-150612T2215Z/
ONTARIO NY-LIVINGSTON NY-ALLEGANY NY-
607 PM EDT FRI JUN 12 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ONTARIO...
SOUTHERN LIVINGSTON AND EASTERN ALLEGANY COUNTIES WILL EXPIRE AT 615
PM EDT...
    
THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4200 7813 4256 7798 4266 7737 4258 7737
      4258 7766 4253 7766 4253 7772 4200 7775
TIME...MOT...LOC 2204Z 262DEG 50KT 4250 7781 4212 7785 

$$

WOOD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 10:16 AM EDT	Flash Flood Watch	BUF	Allegany, Cayuga, Jefferson, Lewis, Livingston, Monroe and 3 more	8 hr
Jun 12, 2:52 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario	38 min
Jun 12, 2:59 PM EDT	Special Marine Warning	BUF		61 min
Jun 12, 3:14 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Wyoming	61 min
Jun 12, 3:20 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Genesee, Niagara, Wyoming	55 min
Jun 12, 3:30 PM EDT	Severe Thunderstorm Warning	BUF	Cattaraugus, Chautauqua	60 min
Jun 12, 4:04 PM EDT	Severe Thunderstorm Warning	BUF	Genesee	26 min
Jun 12, 4:15 PM EDT	Severe Thunderstorm Warning	BUF	Erie, Livingston, Wyoming	60 min
Jun 12, 4:35 PM EDT	Special Weather Statement	BUF	Ontario	55 min
Jun 12, 4:40 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Monroe, Ontario	65 min
Jun 12, 4:42 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Livingston	63 min
Jun 12, 5:20 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Ontario, Wayne	32 min
Jun 12, 5:31 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	29 min
Jun 12, 5:39 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	21 min

Nearby

Severe Thunderstorm Warnings in New York, 2015 Every severe thunderstorm warning in 2015

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.