Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 23, NWS Buffalo, NY

May 29, 2012Livingston County, Monroe County, Ontario County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2012, 12:49 PM EDT for Livingston County, Monroe County, Ontario County, New York. It was in force for 41 min. 2 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: May 29, 2012, 12:49 PM EDT (16:49 UTC)
Expired: May 29, 2012, 1:30 PM EDT
In force: 41 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

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

The radar

The Buffalo radar (KBUF), 85 km from the middle of the area, began a volume at 16:48 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
May 29, 12:50 PM EDT	HAIL 0.75	Honeoye Falls, NY
May 29, 1:10 PM EDT	TSTM WND DMG	Victor, NY	MULTIPLE 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
May 29, 10:27 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 4.8 hours before the alert went out and 82 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: 1783 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

895 
WUUS51 KBUF 291649
SVRBUF
NYC051-055-069-291730-
/O.NEW.KBUF.SV.W.0023.120529T1649Z-120529T1730Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1249 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  SOUTHERN MONROE COUNTY IN WESTERN NEW YORK
  NORTHWESTERN ONTARIO COUNTY IN WESTERN NEW YORK

* UNTIL 130 PM EDT

* AT 1244 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
  SCOTTSVILLE...OR 12 MILES SOUTHWEST OF BRIGHTON...AND MOVING
  NORTHEAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  HENRIETTA...
  EAST ROCHESTER...
  FAIRPORT...
  AVON...
  LIMA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4299 7791 4301 7790 4322 7738 4295 7737
      4285 7769
TIME...MOT...LOC 1649Z 246DEG 36KT 4300 7767

$$

HITCHCOCK

2 follow-up statements

004 
WWUS51 KBUF 291709 RRA
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
109 PM EDT TUE MAY 29 2012

NYC051-291718-
/O.CAN.KBUF.SV.W.0023.000000T0000Z-120529T1730Z/
LIVINGSTON NY-
109 PM EDT TUE MAY 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LIVINGSTON COUNTY
IS CANCELLED...

THE STORM WHICH PROMTED THE WARNING HAS MOVED OUT OF THE AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

LAT...LON 4292 7756 4293 7756 4295 7759 4308 7761
      4319 7738 4295 7737 4289 7755
TIME...MOT...LOC 1708Z 246DEG 36KT 4302 7745

$$

NYC055-069-291730-
/O.CON.KBUF.SV.W.0023.000000T0000Z-120529T1730Z/
ONTARIO NY-MONROE NY-
109 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 PM EDT
FOR SOUTHEASTERN MONROE AND NORTHWESTERN ONTARIO COUNTIES...

AT 107 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 MENDON...OR 6 MILES SOUTH OF FAIRPORT...MOVING NORTHEAST
AT 40 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  MENDON...
  VICTOR...
  FARMINGTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4292 7756 4293 7756 4295 7759 4308 7761
      4319 7738 4295 7737 4289 7755
TIME...MOT...LOC 1708Z 246DEG 36KT 4302 7745

$$

HITCHCOCK

009 
WWUS51 KBUF 291720
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
120 PM EDT TUE MAY 29 2012

NYC055-069-291730-
/O.EXP.KBUF.SV.W.0023.000000T0000Z-120529T1730Z/
ONTARIO NY-MONROE NY-
120 PM EDT TUE MAY 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MONROE AND
NORTHWESTERN ONTARIO COUNTIES WILL EXPIRE AT 130 PM EDT...

AT 120 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT
TUESDAY EVENING FOR WESTERN NEW YORK.

LAT...LON 4292 7756 4293 7756 4295 7759 4308 7761
      4319 7738 4295 7737 4289 7755
TIME...MOT...LOC 1720Z 246DEG 36KT 4307 7730

$$

HITCHCOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 3:51 AM EDT	Special Weather Statement	BUF	Lewis	54 min
May 29, 4:24 AM EDT	Special Weather Statement	BUF	Wyoming	66 min
May 29, 4:33 AM EDT	Special Marine Warning	BUF		27 min
May 29, 4:41 AM EDT	Special Weather Statement	BUF	Jefferson	34 min
May 29, 5:09 AM EDT	Special Weather Statement	BUF	Wyoming	36 min
May 29, 5:17 AM EDT	Special Weather Statement	BUF	Lewis	28 min
May 29, 6:34 AM EDT	Severe Thunderstorm Warning	BUF	Lewis	22 min
May 29, 11:01 AM EDT	Special Weather Statement	BUF	Chautauqua	44 min
May 29, 11:24 AM EDT	Severe Thunderstorm Warning	BUF	Chautauqua	66 min
May 29, 11:39 AM EDT	Severe Thunderstorm Warning	BUF	Erie, Wyoming	51 min
May 29, 12:11 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	64 min
May 29, 12:13 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Ontario	62 min
May 29, 12:20 PM EDT	Severe Thunderstorm Warning	BUF	Genesee, Livingston, Wyoming	41 min
May 29, 12:41 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	44 min
May 29, 12:47 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	58 min
May 29, 12:54 PM EDT	Special Marine Warning	BUF		36 min
May 29, 1:17 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	58 min
May 29, 1:20 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	55 min
May 29, 1:24 PM EDT	Areal Flood Advisory	BUF	Oswego	3 hr
May 29, 1:27 PM EDT	Severe Thunderstorm Warning	BUF	Allegany, Cattaraugus, Livingston	63 min
May 29, 1:47 PM EDT	Severe Thunderstorm Warning	BUF	Lewis, Oswego	38 min
May 29, 2:18 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	43 min

Nearby

Severe Thunderstorm Warnings in New York, 2012 Every severe thunderstorm warning in 2012

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.