Alert archive / New York / Severe Thunderstorm Watches in 2013

Severe Thunderstorm Watch 241

May 29, 201340 counties in New York; 12 counties in Pennsylvania; Bennington County, Windham County, Vermont

The Storm Prediction Center issued this severe thunderstorm watch at May 29, 2013, 3:19 PM EDT for 40 counties in New York; 12 counties in Pennsylvania; Bennington County, Windham County, Vermont. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: May 29, 2013, 3:19 PM EDT (19:19 UTC)
Expired: May 29, 2013, 11:00 PM EDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 54 counties

Albany County, NY, Allegany County, NY, Broome County, NY, Cayuga County, NY, Chemung County, NY, Chenango County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Orange County, NY, Oswego County, NY, Otsego County, NY, Putnam County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Wayne County, NY, Yates County, NY, Bradford County, PA, Lackawanna County, PA, Luzerne County, PA, Lycoming County, PA, McKean County, PA, Pike County, PA, Potter County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Wayne County, PA, Wyoming County, PA, Bennington County, VT, Windham County, VT

The radar

The Binghamton radar (KBGM), 14 km from the middle of the area, began a volume at 19:20 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 20%
One or more EF2 to EF5 tornadoes: 10%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 40%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 29, 4:11 PM EDT	Tornado Warning	BUF	Cayuga, Wayne	34 min
May 29, 4:32 PM EDT	Severe Thunderstorm Warning	BGM	Madison, Oneida, Onondaga	58 min
May 29, 4:32 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Chenango, Cortland, Madison, Onondaga	58 min
May 29, 4:40 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Onondaga, Seneca	65 min
May 29, 4:55 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Madison, Oneida, Onondaga	65 min
May 29, 5:16 PM EDT	Severe Thunderstorm Warning	ALY	Herkimer	59 min
May 29, 5:16 PM EDT	Severe Thunderstorm Warning	BGM	Madison, Oneida, Onondaga	59 min
May 29, 5:29 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Madison, Otsego	61 min
May 29, 5:43 PM EDT	Tornado Warning	BGM	Chenango, Otsego	47 min
May 29, 6:01 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Herkimer, Montgomery	59 min
May 29, 6:06 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Cortland, Otsego	54 min
May 29, 6:18 PM EDT	Flash Flood Warning	ALY	Fulton, Herkimer, Montgomery	3 hr
May 29, 6:27 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Madison, Otsego	63 min
May 29, 6:39 PM EDT	Severe Thunderstorm Warning	BGM	Delaware, Otsego	66 min
May 29, 6:40 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Montgomery, Rensselaer, Saratoga, Schenectady, Washington	65 min
May 29, 6:40 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Greene, Schenectady, Schoharie	35 min
May 29, 6:45 PM EDT	Tornado Warning	ALY	Montgomery, Rensselaer, Saratoga, Schenectady, Schoharie, Washington	45 min
May 29, 6:54 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Delaware, Otsego	36 min
May 29, 7:02 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Columbia, Rensselaer, Saratoga, Schenectady	43 min
May 29, 7:04 PM EDT	Tornado Warning	ALY	Albany, Greene, Schoharie	26 min
May 29, 7:12 PM EDT	Flash Flood Warning	ALY	Albany, Rensselaer, Saratoga, Schenectady	3 hr
May 29, 7:22 PM EDT	Tornado Warning	ALY	Rensselaer, Saratoga, Washington	38 min
May 29, 7:29 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Columbia, Greene, Rensselaer, Schoharie, Ulster	61 min
May 29, 7:31 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	59 min
May 29, 7:34 PM EDT	Severe Thunderstorm Warning	ALY	Bennington, Windham	56 min
May 29, 7:36 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Rensselaer	54 min
May 29, 8:10 PM EDT	Tornado Warning	BGM	Delaware	65 min
May 29, 8:20 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Dutchess, Greene, Ulster	55 min
May 29, 8:22 PM EDT	Flash Flood Warning	ALY	Bennington, Windham	3 hr
May 29, 8:28 PM EDT	Severe Thunderstorm Warning	ALY	Ulster	47 min
May 29, 8:36 PM EDT	Flash Flood Warning	BGM	Delaware	3 hr
May 29, 8:50 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess, Ulster	55 min
May 29, 9:25 PM EDT	Flash Flood Warning	ALY	Dutchess	3 hr
May 29, 9:32 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess	58 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.3 hours before the alert went out and 172 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: 511 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 29, 11:38 AM EDT	Mesoscale Discussion	SPC	Albany, Allegany, Broome, Cattaraugus, Cayuga, Chautauqua and 36 more	2 hr
May 29, 5:56 PM EDT	Mesoscale Discussion	SPC	Albany, Broome, Cayuga, Chemung, Chenango, Columbia and 25 more	64 min
May 28, 8:42 PM EDT	Mesoscale Discussion	SPC	Cameron, Centre, Clarion, Clearfield, Clinton, Crawford and 8 more	93 min

Nearby

Severe Thunderstorm Watches in New York, 2013 Severe Thunderstorm Watches in Pennsylvania, 2013 Severe Thunderstorm Watches in Vermont, 2013 Every severe thunderstorm watch in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.