Alert archive / Montana / Mesoscale Discussions in 2005

Mesoscale Discussion 2541

December 5, 200530 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Dec 5, 2005, 6:29 PM MST for 30 counties in Montana. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Dec 5, 2005, 6:29 PM MST (01:29 UTC)
Expired
Dec 6, 2005, 12:30 AM MST
In force
6 hr
Issued by
the Storm Prediction Center
All 30 counties

Beaverhead County, MT, Broadwater County, MT, Carbon County, MT, Cascade County, MT, Chouteau County, MT, Deer Lodge County, MT, Fergus County, MT, Flathead County, MT, Gallatin County, MT, Golden Valley County, MT, Granite County, MT, Jefferson County, MT, Judith Basin County, MT, Lake County, MT, Lewis and Clark County, MT, Liberty County, MT, Madison County, MT, Meagher County, MT, Mineral County, MT, Missoula County, MT, Park County, MT, Pondera County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT, Stillwater County, MT, Sweet Grass County, MT, Teton County, MT, Wheatland County, MT

The radar

The Great Falls radar (KTFX), 118 km from the middle of the area, began a volume at 01:26 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

Spokane, WA (KOTX), launched 00:00Z, 1.5 hours before the alert went out and 392 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, Spokane, WA at 00:00Z on 2005-12-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Spokane, WA at 00:00Z on 2005-12-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
971 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
165 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

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Nearby

Mesoscale Discussions in Montana, 2005Every 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.