Alert archive / New York / Severe Thunderstorm Watches in 2011

Severe Thunderstorm Watch 446

June 8, 201115 counties in New York

The Storm Prediction Center issued this severe thunderstorm watch at Jun 8, 2011, 8:57 PM EDT for 15 counties in New York. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jun 8, 2011, 8:57 PM EDT (00:57 UTC)
Expired
Jun 9, 2011, 12:06 AM EDT
In force
3 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt

Counties Cayuga County, NY, Fulton County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Madison County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Oswego County, NY, Saratoga County, NY, Warren County, NY, Washington County, NY, Wayne County, NY

The radar

The Ft Drum radar (KTYX), 67 km from the middle of the area, began a volume at 00:59 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

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

IssuedProductOfficeCountiesLasted
Jun 8, 9:13 PM EDTSevere Thunderstorm WarningBUFJefferson, Lewis62 min
Jun 8, 9:32 PM EDTSevere Thunderstorm WarningBUFLewis, Oswego43 min
Jun 8, 9:36 PM EDTSevere Thunderstorm WarningALYFulton, Hamilton, Herkimer, Montgomery, Warren69 min
Jun 8, 9:43 PM EDTSevere Thunderstorm WarningBGMOneida62 min
Jun 8, 10:10 PM EDTSevere Thunderstorm WarningBUFWayne17 min
Jun 8, 10:24 PM EDTSevere Thunderstorm WarningBGMChenango, Madison, Otsego36 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 00:00Z, 1.0 hours before the alert went out and 133 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-pSkew-T log-p diagram, Albany, NY at 00:00Z on 2011-06-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3772 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2011-06-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3772 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1390 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
167 m²/s²
Significant tornado parameter
1.2
Supercell composite
10.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 8, 8:36 PM EDTMesoscale DiscussionSPCCayuga, Fulton, Hamilton, Herkimer, Jefferson, Lewis and 6 more84 min
Jun 9, 3:29 AM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 10 more2 hr
Jun 9, 3:56 AM EDTSevere Thunderstorm WatchSPCAllegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 14 more6 hr
Jun 9, 8:13 AM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Cayuga, Chautauqua, Chemung, Erie and 12 more2 hr
Jun 9, 10:36 AM EDTMesoscale DiscussionSPCAlbany, Allegany, Broome, Cattaraugus, Cayuga, Chemung and 30 more84 min
Jun 9, 11:33 AM EDTMesoscale DiscussionSPCAlbany, Broome, Chemung, Chenango, Columbia, Cortland and 16 more57 min
Jun 9, 12:06 PM EDTSevere Thunderstorm WatchSPCAlbany, Broome, Cayuga, Chemung, Chenango, Clinton and 28 more8 hr
Jun 9, 1:45 PM EDTMesoscale DiscussionSPCBronx, Dutchess, Kings, Nassau, New York, Orange and 6 more90 min
Jun 9, 2:34 PM EDTSevere Thunderstorm WatchSPCBronx, Kings, Nassau, New York, Orange, Putnam and 5 more7 hr
Jun 9, 3:18 PM EDTMesoscale DiscussionSPCAlbany, Broome, Chenango, Columbia, Cortland, Delaware and 20 more87 min
Jun 9, 4:17 PM EDTMesoscale DiscussionSPCBronx, Dutchess, Kings, Nassau, New York, Orange and 5 more88 min
Jun 9, 7:17 PM EDTMesoscale DiscussionSPCAlbany, Bronx, Columbia, Dutchess, Fulton, Greene and 19 more58 min

Nearby

Severe Thunderstorm Watches in New York, 2011Every 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.