Alert archive / Montana / Mesoscale Discussions in 2016

Mesoscale Discussion 1488

August 6, 20169 counties in Idaho; 22 counties in Montana; 6 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2016, 2:37 PM MDT for 9 counties in Idaho; 22 counties in Montana; 6 counties in Wyoming. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 6, 2016, 2:37 PM MDT (20:37 UTC)
Expired: Aug 6, 2016, 5:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 37 counties

Bingham County, ID, Bonneville County, ID, Butte County, ID, Clark County, ID, Fremont County, ID, Jefferson County, ID, Lemhi County, ID, Madison County, ID, Teton County, ID, Beaverhead County, MT, Big Horn County, MT, Broadwater County, MT, Carbon County, MT, Cascade County, MT, Deer Lodge County, MT, Gallatin County, MT, Golden Valley County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Madison County, MT, Meagher County, MT, Musselshell County, MT, Park County, MT, Powell County, MT, Silver Bow County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Wheatland County, MT, Yellowstone County, MT, Big Horn County, WY, Hot Springs County, WY, Park County, WY, Sheridan County, WY, Teton County, WY, Washakie County, WY

The radar

The Billings radar (KBLX), 207 km from the middle of the area, began a volume at 20:40 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.

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 8.6 hours before the alert went out and 279 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: 2513 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Montana, 2016 Mesoscale Discussions in Idaho, 2016 Mesoscale Discussions in Wyoming, 2016 Every mesoscale discussion 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.