Alert archive / Montana / Mesoscale Discussions in 2005

Mesoscale Discussion 1369

June 16, 200516 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2005, 7:55 PM MDT for 16 counties in Montana. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2005, 7:55 PM MDT (01:55 UTC)
Expired: Jun 16, 2005, 9:30 PM MDT
In force: 95 min
Issued by: the Storm Prediction Center

Counties Big Horn County, MT, Blaine County, MT, Chouteau County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, Hill County, MT, Judith Basin County, MT, Liberty County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Treasure County, MT, Valley County, MT, Wheatland County, MT, Yellowstone County, MT

The radar

The Glasgow radar (KGGW), 158 km from the middle of the area, began a volume at 01:56 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 00:00Z, 1.9 hours before the alert went out and 160 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: 145 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 1756 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 17, 12:26 PM MDT	Mesoscale Discussion	SPC	Blaine, Broadwater, Cascade, Chouteau, Fergus, Gallatin and 16 more	64 min
Jun 17, 12:55 PM MDT	Severe Thunderstorm Watch	SPC	Blaine, Broadwater, Carbon, Cascade, Chouteau, Fergus and 17 more	8 hr
Jun 17, 4:09 PM MDT	Mesoscale Discussion	SPC	Blaine, Broadwater, Carbon, Cascade, Chouteau, Fergus and 17 more	2 hr
Jun 17, 5:10 PM MDT	Severe Thunderstorm Watch	SPC	Daniels, Garfield, McCone, Petroleum, Phillips, Prairie and 1 more	6 hr

Nearby

Mesoscale Discussions in Montana, 2005 Every mesoscale discussion in 2005

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.