Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 34, NWS Buffalo, NY

June 12, 20154 counties in New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 12, 2015, 4:40 PM EDT for 4 counties in New York. It was in force for 65 min. 3 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: Jun 12, 2015, 4:40 PM EDT (20:40 UTC)
Expired: Jun 12, 2015, 5:45 PM EDT
In force: 65 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Genesee County, NY, Livingston County, NY, Monroe County, NY, Ontario County, NY

The radar

The Buffalo radar (KBUF), 90 km from the middle of the area, began a volume at 20:41 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, 4:54 PM EDT	TSTM WND DMG	West Rush, NY	TREE BLOCKING THE SOUTH DOWN LANE OF EAST RIVER ROAD
Jun 12, 5:18 PM EDT	TSTM WND DMG	East Bloomfield, NY	SHERIFFS OFFICE REPORTS TREES DOWN IN THE CITY
Jun 12, 5:31 PM EDT	TSTM WND DMG	Bristol, NY	SHERIFFS OFFICE REPORTS MULTIPLE TREES DOWN IN BRISTOL

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, 8.7 hours before the alert went out and 87 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.

067 
WUUS51 KBUF 122040
SVRBUF
NYC037-051-055-069-122145-
/O.NEW.KBUF.SV.W.0034.150612T2040Z-150612T2145Z/

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

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ONTARIO COUNTY IN WESTERN NEW YORK...
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK...
  SOUTHEASTERN GENESEE COUNTY IN WESTERN NEW YORK...
  SOUTHWESTERN MONROE COUNTY IN WESTERN NEW YORK...

* UNTIL 545 PM EDT

* AT 440 PM EDT...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 CALEDONIA...OR 10 MILES
  NORTHWEST OF GENESEO...AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CANANDAIGUA...LE ROY...AVON...VICTOR...HONEOYE FALLS...PAVILION...
  BRISTOL AND CALEDONIA.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 390 BETWEEN EXITS 9 AND 11.
 INTERSTATE 90 BETWEEN EXITS 45 AND 43.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

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

LAT...LON 4286 7806 4302 7803 4301 7700 4281 7702
TIME...MOT...LOC 2040Z 272DEG 33KT 4293 7792 

$$

ZAFF

2 follow-up statements

573 
WWUS51 KBUF 122109
SVSBUF

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

NYC037-051-122119-
/O.CAN.KBUF.SV.W.0034.000000T0000Z-150612T2145Z/
LIVINGSTON NY-GENESEE NY-
509 PM EDT FRI JUN 12 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LIVINGSTON AND
SOUTHEASTERN GENESEE COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 4285 7749 4291 7756 4292 7756 4294 7758
      4294 7760 4301 7763 4301 7700 4281 7702
TIME...MOT...LOC 2109Z 272DEG 33KT 4292 7756 

$$

NYC055-069-122145-
/O.CON.KBUF.SV.W.0034.000000T0000Z-150612T2145Z/
ONTARIO NY-MONROE NY-
509 PM EDT FRI JUN 12 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR NORTHERN ONTARIO AND SOUTH CENTRAL MONROE COUNTIES...

AT 509 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED OVER HONEOYE FALLS...OR 13 MILES SOUTH OF
EAST ROCHESTER...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
CANANDAIGUA...VICTOR...HONEOYE FALLS...BRISTOL...CLIFTON SPRINGS...
PHELPS...BLOOMFIELD AND FARMINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. ALTHOUGH A
TORNADO IS NOT IMMEDIATELY LIKELY...IF ONE IS SPOTTED...ACT QUICKLY
AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A
BASEMENT OR SMALL INTERIOR ROOM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

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

LAT...LON 4285 7749 4291 7756 4292 7756 4294 7758
      4294 7760 4301 7763 4301 7700 4281 7702
TIME...MOT...LOC 2109Z 272DEG 33KT 4292 7756 

$$

ZAFF

875 
WWUS51 KBUF 122141
SVSBUF

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

NYC055-069-122149-
/O.EXP.KBUF.SV.W.0034.000000T0000Z-150612T2145Z/
ONTARIO NY-MONROE NY-
541 PM EDT FRI JUN 12 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ONTARIO AND SOUTH
CENTRAL MONROE COUNTIES WILL EXPIRE AT 545 PM EDT...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED EAST.  
HOWEVER...A NEW WARNING IS NOW IN PLACE FOR NORTHEASTERN ONTARIO 
COUNTY. 

REPEAT...A SEVERE THUNDERSTORM WARNING STILL REMAINS IN EFFECT FOR 
NORTHEASTERN ONTARIO COUNTY UNTIL 600 PM EDT.


LAT...LON 4285 7749 4291 7756 4292 7756 4294 7758
      4294 7760 4301 7763 4301 7700 4281 7702
TIME...MOT...LOC 2137Z 272DEG 33KT 4292 7756 

$$

ZAFF

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, 4:42 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
Jun 12, 5:40 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Livingston, Ontario	35 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.