Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 20, NWS Buffalo, NY

May 29, 2012Genesee County, Livingston County, Wyoming County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at May 29, 2012, 12:20 PM EDT for Genesee County, Livingston County, Wyoming County, New York. It was in force for 41 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: May 29, 2012, 12:20 PM EDT (16:20 UTC)
Expired: May 29, 2012, 1:01 PM EDT
In force: 41 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

Counties Genesee County, NY, Livingston County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 61 km from the middle of the area, began a volume at 16:21 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, 12:24 PM EDT	HAIL 1	Warsaw, NY

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, 4.3 hours before the alert went out and 57 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.

375 
WUUS51 KBUF 291620
SVRBUF
NYC037-051-121-291715-
/O.NEW.KBUF.SV.W.0020.120529T1620Z-120529T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1220 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME SOUTHEASTERN GENESEE COUNTY IN WESTERN NEW YORK
  NORTHERN LIVINGSTON COUNTY IN WESTERN NEW YORK
  NORTHEASTERN WYOMING COUNTY IN WESTERN NEW YORK

* UNTIL 115 PM EDT

* AT 1216 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
  WARSAW...OR 18 MILES SOUTH OF BATAVIA...AND MOVING EAST AT 35 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  PERRY...
  YORK...
  PIFFARD...

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 4283 7826 4299 7791 4298 7788 4278 7758
      4264 7815
TIME...MOT...LOC 1618Z 248DEG 30KT 4275 7815

$$

HITCHCOCK

2 follow-up statements

886 
WWUS51 KBUF 291642
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1242 PM EDT TUE MAY 29 2012

NYC037-051-121-291715-
/O.CON.KBUF.SV.W.0020.000000T0000Z-120529T1715Z/
GENESEE NY-LIVINGSTON NY-WYOMING NY-
1242 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EDT
FOR NORTHEASTERN WYOMING...NORTHERN LIVINGSTON AND SOUTHEASTERN
GENESEE COUNTIES...

AT 1239 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 LEICESTER...OR 6 MILES WEST OF GENESEO...MOVING EAST AT 
35 MPH. ANOTHER SEVERE THUNDERSTORM WAS LOCATED ABOUT 5 MILES 
SOUTHWEST OF WARSAW...AND MOVING NORTHEAST AT 35 MPH.

SOME LOCATIONS IN THE WARNING INCLUDE...
  GENESEO...
  LIVONIA...
  WARSAW...

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 4283 7826 4299 7791 4298 7788 4278 7758
      4264 7815
TIME...MOT...LOC 1641Z 248DEG 30KT 4282 7791

$$

HITCHCOCK

704 
WWUS51 KBUF 291701
SVSBUF

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

NYC037-051-121-291710-
/O.CAN.KBUF.SV.W.0020.000000T0000Z-120529T1715Z/
GENESEE NY-LIVINGSTON NY-WYOMING NY-
101 PM EDT TUE MAY 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WYOMING...
NORTHERN LIVINGSTON AND SOUTHEASTERN GENESEE COUNTIES IS CANCELLED...

AT 100 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 CANCELLED.

A SEPRATE SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
NORTHEAST LIVINGSTON COUNTY UNTIL 130 PM EDT.

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

LAT...LON 4283 7826 4299 7791 4298 7788 4278 7758
      4264 7815
TIME...MOT...LOC 1700Z 248DEG 30KT 4288 7771

$$

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, 12:41 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, 12:49 PM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe, Ontario	41 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.