Alert archive / Montana / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 244

June 10, 201620 counties in Montana

The Storm Prediction Center issued this severe thunderstorm watch at Jun 10, 2016, 3:06 PM MDT for 20 counties in Montana. It was in force for 11 hr.

The area

The outline as issued.

The facts

Issued: Jun 10, 2016, 3:06 PM MDT (21:06 UTC)
Expired: Jun 11, 2016, 1:56 AM MDT
In force: 11 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

Counties Blaine County, MT, Cascade County, MT, Chouteau County, MT, Dawson County, MT, Fergus County, MT, Garfield County, MT, Hill County, MT, Judith Basin County, MT, Liberty County, MT, McCone County, MT, Meagher County, MT, Petroleum County, MT, Phillips County, MT, Pondera County, MT, Prairie County, MT, Richland County, MT, Teton County, MT, Toole County, MT, Valley County, MT, Wibaux County, MT

The radar

The Great Falls radar (KTFX), 91 km from the middle of the area, began a volume at 21:08 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: 10%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 10, 3:20 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin	25 min
Jun 10, 3:45 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Fergus	45 min
Jun 10, 4:30 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus	60 min
Jun 10, 4:37 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin	38 min
Jun 10, 4:42 PM MDT	Tornado Warning	TFX	Chouteau, Fergus	33 min
Jun 10, 5:14 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus, Judith Basin	46 min
Jun 10, 5:17 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	43 min
Jun 10, 6:00 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus	30 min
Jun 10, 6:03 PM MDT	Tornado Warning	TFX	Fergus	27 min
Jun 10, 6:17 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	28 min
Jun 10, 6:20 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	55 min
Jun 10, 6:24 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin	35 min
Jun 10, 6:31 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	29 min
Jun 10, 6:52 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	38 min
Jun 10, 7:11 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	64 min
Jun 10, 7:16 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Fergus	57 min
Jun 10, 7:20 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	55 min
Jun 10, 7:30 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	15 min
Jun 10, 8:12 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Fergus	45 min
Jun 10, 8:28 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Judith Basin	47 min
Jun 10, 8:36 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips	54 min
Jun 10, 9:15 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Fergus, Judith Basin	30 min
Jun 10, 9:28 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips, Valley	62 min
Jun 10, 9:43 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	32 min
Jun 10, 9:50 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Garfield, McCone, Prairie, Richland	55 min
Jun 10, 10:15 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	30 min
Jun 10, 10:26 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, McCone, Prairie, Roosevelt, Valley	64 min
Jun 10, 10:41 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone, Prairie	64 min
Jun 10, 11:09 PM MDT	Severe Thunderstorm Warning	GGW	Phillips, Valley	66 min
Jun 10, 11:41 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, Richland, Wibaux	64 min
Jun 11, 1:37 AM MDT	Severe Thunderstorm Warning	GGW	Daniels, Roosevelt, Valley	53 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

Great_falls, MT (KTFX), launched 12:00Z, 9.1 hours before the alert went out and 65 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: 2289 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 155 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, 6:05 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 22 more	85 min
Jun 9, 9:25 PM MDT	Mesoscale Discussion	SPC	Fallon, Wibaux	95 min
Jun 10, 2:21 PM MDT	Mesoscale Discussion	SPC	Broadwater, Cascade, Chouteau, Fergus, Gallatin, Golden Valley and 7 more	54 min
Jun 10, 5:18 PM MDT	Mesoscale Discussion	SPC	Fergus, Garfield, Golden Valley, Judith Basin, Meagher, Musselshell and 2 more	57 min

Nearby

Severe Thunderstorm Watches in Montana, 2016 Every severe thunderstorm watch in 2016

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.