Alert archive / Montana / Mesoscale Discussions in 2005

Mesoscale Discussion 1453

June 24, 200510 counties in Montana; 9 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2005, 9:28 PM MDT for 10 counties in Montana; 9 counties in North Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 24, 2005, 9:28 PM MDT (03:28 UTC)
Expired: Jun 24, 2005, 11:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Big Horn County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Prairie County, MT, Richland County, MT, Rosebud County, MT, Treasure County, MT, Wibaux County, MT, Yellowstone County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, Slope County, ND, Stark County, ND

The radar

The Glasgow radar (KGGW), 205 km from the middle of the area, began a volume at 03:29 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

Rapid City, SD (KUNR), launched 00:00Z, 3.5 hours before the alert went out and 338 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: 1148 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1283 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 6.4

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 24, 6:32 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Powder River	88 min
Jun 24, 10:08 PM MDT	Mesoscale Discussion	SPC	Carter	67 min
Jun 25, 11:56 AM MDT	Mesoscale Discussion	SPC	Blaine, Fergus, Garfield, Petroleum, Phillips, Valley	64 min
Jun 25, 12:34 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Broadwater, Deer Lodge, Gallatin, Granite, Jefferson and 6 more	86 min
Jun 25, 1:25 PM MDT	Severe Thunderstorm Watch	SPC	Beaverhead, Broadwater, Gallatin, Golden Valley, Jefferson, Madison and 6 more	7 hr
Jun 25, 1:45 PM MDT	Tornado Watch	SPC	Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 15 more	7 hr
Jun 25, 2:57 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Broadwater, Deer Lodge, Gallatin, Golden Valley, Jefferson and 7 more	63 min
Jun 25, 5:09 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carter, Custer, Daniels, Dawson, Fallon and 15 more	2 hr

Nearby

Mesoscale Discussions in Montana, 2005 Mesoscale Discussions in North Dakota, 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.