Alert archive / New York / Severe Thunderstorm Watches in 2009

Severe Thunderstorm Watch 587

July 16, 20095 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 16, 2009, 1:39 PM EDT for 5 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 16, 2009, 1:39 PM EDT (17:39 UTC)
Expired: Jul 16, 2009, 8:00 PM EDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 46 counties

Northwest Hills Planning Region, CT, Berkshire County, MA, Albany County, NY, Broome 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, St. Lawrence County, NY, Sullivan County, NY, Ulster County, NY, Warren County, NY, Washington County, NY, Susquehanna County, PA, Wayne 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 Ft Drum radar (KTYX), 96 km from the middle of the area, began a volume at 17:42 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: 30%
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: 10%
Six or more combined severe hail and wind reports: 70%

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
Jul 16, 2:28 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Cortland, Madison	47 min
Jul 16, 2:39 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	36 min
Jul 16, 2:43 PM EDT	Severe Thunderstorm Warning	BGM	Cortland, Madison, Oneida, Onondaga	42 min
Jul 16, 2:47 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	43 min
Jul 16, 3:01 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Herkimer, Montgomery	59 min
Jul 16, 3:23 PM EDT	Severe Thunderstorm Warning	BGM	Madison, Otsego	43 min
Jul 16, 3:33 PM EDT	Severe Thunderstorm Warning	BTV	St. Lawrence	57 min
Jul 16, 4:00 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Herkimer, Montgomery	60 min
Jul 16, 4:20 PM EDT	Severe Thunderstorm Warning	BTV	Clinton	55 min
Jul 16, 4:42 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Fulton, Montgomery, Saratoga, Schenectady, Schoharie	63 min
Jul 16, 4:42 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Lamoille, Washington	52 min
Jul 16, 5:09 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden, Franklin, Lamoille	51 min
Jul 16, 5:14 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, St. Lawrence	61 min
Jul 16, 5:19 PM EDT	Severe Thunderstorm Warning	ALY	Albany, Rensselaer, Saratoga, Schenectady	56 min
Jul 16, 5:22 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	53 min
Jul 16, 5:29 PM EDT	Severe Thunderstorm Warning	BTV	Essex	61 min
Jul 16, 5:49 PM EDT	Severe Thunderstorm Warning	BTV	Franklin, Lamoille, Orleans	43 min
Jul 16, 5:54 PM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wyoming	30 min
Jul 16, 5:58 PM EDT	Severe Thunderstorm Warning	BTV	Clinton	62 min
Jul 16, 6:11 PM EDT	Severe Thunderstorm Warning	ALY	Columbia	64 min
Jul 16, 6:15 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	60 min
Jul 16, 6:25 PM EDT	Severe Thunderstorm Warning	BTV	Clinton, Franklin, St. Lawrence	65 min
Jul 16, 6:30 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Rutland, Windsor	60 min
Jul 16, 6:43 PM EDT	Severe Thunderstorm Warning	BTV	Orange, Washington	62 min
Jul 16, 6:47 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Greene	28 min
Jul 16, 6:53 PM EDT	Tornado Warning	BTV	Orange, Washington	52 min
Jul 16, 6:55 PM EDT	Flash Flood Warning	ALY	Columbia	110 min
Jul 16, 6:55 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess, Ulster	65 min
Jul 16, 6:59 PM EDT	Severe Thunderstorm Warning	ALY	Northwest Hills Planning Region	61 min
Jul 16, 7:20 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	39 min
Jul 16, 7:28 PM EDT	Tornado Warning	BTV	Orange	32 min
Jul 16, 7:30 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Dutchess	35 min
Jul 16, 7:39 PM EDT	Flash Flood Warning	ALY	Northwest Hills Planning Region	3 hr
Jul 16, 7:58 PM EDT	Severe Thunderstorm Warning	ALY	Northwest Hills Planning Region	62 min

Discussions around it

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

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 12:04 PM EDT	Mesoscale Discussion	SPC		86 min
Jul 16, 6:16 PM EDT	Mesoscale Discussion	SPC		59 min
Jul 16, 7:42 PM EDT	Mesoscale Discussion	SPC		33 min
Jul 16, 4:55 PM EDT	Mesoscale Discussion	SPC	Berkshire	65 min
Jul 16, 4:04 PM EDT	Mesoscale Discussion	SPC	Bronx, Kings, Nassau, New York, Orange, Putnam and 4 more	86 min

Nearby

Severe Thunderstorm Watches in New York, 2009 Severe Thunderstorm Watches in Vermont, 2009 Severe Thunderstorm Watches in Pennsylvania, 2009 Every severe thunderstorm watch in 2009

Sources

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