Alert archive / New York / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 605

July 6, 20117 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 6, 2011, 1:29 PM EDT for 7 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jul 6, 2011, 1:29 PM EDT (17:29 UTC)
Expired: Jul 6, 2011, 9:00 PM EDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 77 counties

Capitol Planning Region, CT, Northwest Hills Planning Region, CT, Berkshire County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Worcester County, MA, Franklin County, ME, Oxford County, ME, Somerset County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Sullivan County, NH, Albany County, NY, Broome 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, Franklin 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, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Bradford County, PA, Clinton County, PA, Lackawanna County, PA, Luzerne County, PA, Lycoming County, PA, Pike County, PA, Potter County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga 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 Burlington radar (KCXX), 85 km from the middle of the area, began a volume at 17:32 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: 50%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 30%
One or more hailstones of 2 inches or more: 20%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 6, 1:51 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Franklin	39 min
Jul 6, 2:08 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex, Franklin	52 min
Jul 6, 2:30 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Essex	60 min
Jul 6, 2:37 PM EDT	Severe Thunderstorm Warning	BTV	Essex	53 min
Jul 6, 2:42 PM EDT	Severe Thunderstorm Warning	BTV	Clinton	63 min
Jul 6, 3:12 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Chittenden, Essex, Franklin, Lamoille, Orleans and 1 more	63 min
Jul 6, 3:14 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Montgomery, Saratoga, Schenectady	51 min
Jul 6, 3:18 PM EDT	Severe Thunderstorm Warning	BTV	Essex	57 min
Jul 6, 3:43 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	32 min
Jul 6, 3:51 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer, Washington	39 min
Jul 6, 3:51 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Essex, Lamoille, Orleans, Washington	54 min
Jul 6, 3:56 PM EDT	Severe Thunderstorm Warning	GYX	Coos	64 min
Jul 6, 4:09 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Caledonia, Orange, Rutland, Washington, Windsor	66 min
Jul 6, 4:12 PM EDT	Severe Thunderstorm Warning	GYX	Carroll, Coos, Grafton	63 min
Jul 6, 4:25 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	45 min
Jul 6, 4:28 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	47 min
Jul 6, 4:28 PM EDT	Severe Thunderstorm Warning	BGM	Otsego	47 min
Jul 6, 4:34 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Herkimer, Montgomery, Schoharie	56 min
Jul 6, 4:40 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	35 min
Jul 6, 4:48 PM EDT	Severe Thunderstorm Warning	ALY	Saratoga, Warren, Washington	57 min
Jul 6, 4:49 PM EDT	Severe Thunderstorm Warning	BTV	Orange, Rutland, Windsor	56 min
Jul 6, 5:00 PM EDT	Severe Thunderstorm Warning	GYX	Oxford	45 min
Jul 6, 5:03 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Montgomery, Saratoga, Schenectady, Schoharie	57 min
Jul 6, 5:08 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford	37 min
Jul 6, 5:14 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Oxford, Somerset	46 min
Jul 6, 5:26 PM EDT	Severe Thunderstorm Warning	BGM	Delaware, Otsego	34 min
Jul 6, 5:35 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Franklin, Kennebec, Oxford, Somerset	40 min
Jul 6, 5:35 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	40 min
Jul 6, 5:49 PM EDT	Severe Thunderstorm Warning	CAR	Piscataquis, Somerset	56 min
Jul 6, 5:55 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	65 min
Jul 6, 6:00 PM EDT	Severe Thunderstorm Warning	GYX	Oxford, York	45 min
Jul 6, 6:11 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Franklin, Kennebec, Oxford, Sagadahoc and 2 more	49 min
Jul 6, 6:12 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	33 min
Jul 6, 6:34 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	56 min
Jul 6, 6:52 PM EDT	Severe Thunderstorm Warning	GYX	Androscoggin, Cumberland, Oxford, York	53 min
Jul 6, 6:54 PM EDT	Severe Thunderstorm Warning	BOX	Hampshire	66 min
Jul 6, 7:01 PM EDT	Severe Thunderstorm Warning	GYX	Kennebec, Knox, Somerset, Waldo	29 min
Jul 6, 7:07 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	53 min
Jul 6, 7:26 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Middlesex, Worcester	36 min
Jul 6, 7:39 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	66 min
Jul 6, 7:47 PM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	32 min
Jul 6, 7:59 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	46 min
Jul 6, 8:23 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire, Worcester	52 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, 5.5 hours before the alert went out and 128 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: 1486 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 69 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
Jul 6, 6:03 PM EDT	Mesoscale Discussion	SPC		87 min
Jul 6, 1:04 PM EDT	Mesoscale Discussion	SPC	Oxford	56 min
Jul 6, 5:35 PM EDT	Severe Thunderstorm Watch	SPC	Penobscot, Piscataquis	3 hr

Nearby

Severe Thunderstorm Watches in New York, 2011 Severe Thunderstorm Watches in Vermont, 2011 Severe Thunderstorm Watches in Pennsylvania, 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.