Alert archive / New York / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 450

June 9, 20116 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 9, 2011, 12:06 PM EDT for 6 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jun 9, 2011, 12:06 PM EDT (16:06 UTC)
Expired: Jun 9, 2011, 8:00 PM EDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 70 kt

All 82 counties

Berkshire County, MA, Androscoggin County, ME, Aroostook County, ME, Cumberland County, ME, Franklin County, ME, Hancock County, ME, Kennebec County, ME, Knox County, ME, Lincoln County, ME, Oxford County, ME, Penobscot County, ME, Piscataquis County, ME, Sagadahoc County, ME, Somerset County, ME, Waldo County, ME, Washington County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Albany County, NY, Broome County, NY, Cayuga County, NY, Chemung County, NY, Chenango County, NY, Clinton County, NY, Columbia County, NY, Cortland County, NY, Delaware County, NY, Dutchess County, NY, Essex County, NY, Fulton County, NY, Greene County, NY, Hamilton County, NY, Herkimer County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Otsego 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, Yates County, NY, Bradford County, PA, Lackawanna County, PA, Luzerne County, PA, Pike County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA, Addison County, VT, Bennington County, VT, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Franklin County, VT, Grand Isle County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Rutland County, VT, Washington County, VT, Windham County, VT, Windsor County, VT

The radar

The Portland,ME radar (KGYX), 115 km from the middle of the area, began a volume at 16:09 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: 5%
Ten or more severe wind reports: 95%
One or more gusts of 65 knots or more: 60%
Ten or more severe hail reports: 90%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 9, 12:09 PM EDT	Severe Thunderstorm Warning	BTV	Essex	66 min
Jun 9, 12:42 PM EDT	Severe Thunderstorm Warning	ALY	Herkimer, Montgomery, Schoharie	63 min
Jun 9, 12:42 PM EDT	Severe Thunderstorm Warning	BGM	Madison, Oneida, Otsego	63 min
Jun 9, 12:46 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Cortland	44 min
Jun 9, 12:48 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Hamilton, Montgomery, Saratoga, Schenectady, Warren	57 min
Jun 9, 1:00 PM EDT	Severe Thunderstorm Warning	ALY	Hamilton, Saratoga, Warren, Washington	75 min
Jun 9, 1:00 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Cortland, Tioga, Tompkins	60 min
Jun 9, 1:04 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Cortland, Madison, Oneida, Onondaga, Otsego	56 min
Jun 9, 1:18 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Tioga, Tompkins	57 min
Jun 9, 1:23 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Cortland, Otsego	67 min
Jun 9, 1:29 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	46 min
Jun 9, 1:34 PM EDT	Severe Thunderstorm Warning	BGM	Otsego	45 min
Jun 9, 1:41 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Montgomery, Schenectady, Schoharie	64 min
Jun 9, 1:48 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Montgomery, Saratoga, Schenectady	57 min
Jun 9, 1:49 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland, Windsor	56 min
Jun 9, 1:53 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Delaware, Otsego	67 min
Jun 9, 1:57 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Orange, Washington, Windsor	53 min
Jun 9, 2:08 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	67 min
Jun 9, 2:09 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Tioga	66 min
Jun 9, 2:11 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Tioga	64 min
Jun 9, 2:17 PM EDT	Severe Thunderstorm Warning	ALY	Hamilton, Saratoga, Warren, Washington	73 min
Jun 9, 2:19 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	41 min
Jun 9, 2:34 PM EDT	Severe Thunderstorm Warning	GYX	Grafton, Merrimack, Sullivan	41 min
Jun 9, 2:37 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Greene, Schoharie	53 min
Jun 9, 2:39 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	36 min
Jun 9, 2:41 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Chittenden, Lamoille, Orange, Orleans, Washington	45 min
Jun 9, 2:42 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	48 min
Jun 9, 2:55 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	65 min
Jun 9, 2:55 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	65 min
Jun 9, 2:55 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	65 min
Jun 9, 3:00 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	60 min
Jun 9, 3:01 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Delaware, Sullivan	59 min
Jun 9, 3:03 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	57 min
Jun 9, 3:06 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire	54 min
Jun 9, 3:09 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	16 min
Jun 9, 3:10 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	50 min
Jun 9, 3:28 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	77 min
Jun 9, 3:34 PM EDT	Flash Flood Warning	CAR	Aroostook	2 hr
Jun 9, 3:38 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, Oxford, York	67 min
Jun 9, 3:43 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	62 min
Jun 9, 3:47 PM EDT	Severe Thunderstorm Warning	BGM	Delaware, Sullivan	88 min
Jun 9, 3:49 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess, Ulster	56 min
Jun 9, 3:54 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	51 min
Jun 9, 3:55 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	65 min
Jun 9, 3:56 PM EDT	Severe Thunderstorm Warning	GYX	York	64 min
Jun 9, 3:58 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	47 min
Jun 9, 4:02 PM EDT	Tornado Warning	CAR	Aroostook	28 min
Jun 9, 4:05 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Franklin, Kennebec	40 min
Jun 9, 4:06 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	54 min
Jun 9, 4:10 PM EDT	Flash Flood Warning	CAR	Aroostook	3 hr
Jun 9, 4:11 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Dutchess, Ulster	64 min
Jun 9, 4:15 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford	60 min
Jun 9, 4:23 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	67 min
Jun 9, 4:26 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	79 min
Jun 9, 4:27 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess	63 min
Jun 9, 4:35 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland, York	40 min
Jun 9, 4:43 PM EDT	Severe Thunderstorm Warning	GYX	Somerset	35 min
Jun 9, 4:44 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Knox, Lincoln, Waldo	46 min
Jun 9, 4:55 PM EDT	Severe Thunderstorm Warning	GYX	York	25 min
Jun 9, 5:15 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex	60 min
Jun 9, 5:17 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec, Knox, Lincoln, Sagadahoc, Waldo	43 min
Jun 9, 5:23 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis	52 min
Jun 9, 5:33 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Kennebec	42 min
Jun 9, 5:45 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne	45 min
Jun 9, 6:11 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Chittenden, Rutland, Windsor	49 min
Jun 9, 6:22 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	38 min
Jun 9, 7:00 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	45 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

Gray, ME (KGYX), launched 12:00Z, 4.1 hours before the alert went out and 115 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: 117 J/kg
Mixed-layer CIN: -316 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 178 m²/s²
0-3 km storm-relative helicity: 211 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
Jun 9, 3:18 PM EDT	Mesoscale Discussion	SPC	Androscoggin, Aroostook, Cumberland, Franklin, Hancock, Kennebec and 8 more	87 min
Jun 9, 7:17 PM EDT	Mesoscale Discussion	SPC	Androscoggin, Cumberland, Franklin, Hancock, Kennebec, Knox and 7 more	58 min
Jun 9, 11:33 AM EDT	Mesoscale Discussion	SPC	Berkshire, Franklin, Hampden, Hampshire	57 min
Jun 9, 1:45 PM EDT	Mesoscale Discussion	SPC	Bristol, Hampden, Hampshire, Middlesex, Norfolk, Plymouth and 2 more	90 min
Jun 9, 2:34 PM EDT	Severe Thunderstorm Watch	SPC	Barnstable, Bristol, Dukes, Essex, Franklin, Hampden and 7 more	7 hr
Jun 9, 4:17 PM EDT	Mesoscale Discussion	SPC	Essex, Middlesex, Norfolk, Suffolk, Worcester	88 min
Jun 8, 8:36 PM EDT	Mesoscale Discussion	SPC	Cayuga, Fulton, Hamilton, Herkimer, Jefferson, Lewis and 6 more	84 min
Jun 8, 8:57 PM EDT	Severe Thunderstorm Watch	SPC	Cayuga, Fulton, Hamilton, Herkimer, Jefferson, Lewis and 9 more	3 hr
Jun 9, 3:29 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 10 more	2 hr
Jun 9, 3:56 AM EDT	Severe Thunderstorm Watch	SPC	Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 14 more	6 hr
Jun 9, 8:13 AM EDT	Mesoscale Discussion	SPC	Allegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 12 more	2 hr
Jun 9, 10:36 AM EDT	Mesoscale Discussion	SPC	Albany, Allegany, Broome, Cattaraugus, Cayuga, Chemung and 30 more	84 min
Jun 9, 12:53 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 41 more	7 hr
Jun 9, 6:17 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Blair, Cambria, Cumberland, Fayette and 8 more	58 min

Nearby

Severe Thunderstorm Watches in New York, 2011 Severe Thunderstorm Watches in Maine, 2011 Severe Thunderstorm Watches in Vermont, 2011 Every severe thunderstorm watch in 2011

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.