Alert archive / Montana / Mesoscale Discussions in 2003

Mesoscale Discussion 1310

June 10, 200315 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Jun 10, 2003, 8:27 PM MDT for 15 counties in Montana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 10, 2003, 8:27 PM MDT (02:27 UTC)
Expired
Jun 10, 2003, 10:30 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Blaine County, MT, Chouteau County, MT, Fergus County, MT, Golden Valley County, MT, Hill County, MT, Judith Basin County, MT, Meagher County, MT, Musselshell County, MT, Park County, MT, Petroleum County, MT, Phillips County, MT, Stillwater County, MT, Sweet Grass County, MT, Wheatland County, MT, Yellowstone County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 2.5 hours before the alert went out and 91 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, Great_falls, MT at 00:00Z on 2003-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 284 joules per kilogram.LCLEL10008507005003002001001 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, Great_falls, MT at 00:00Z on 2003-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.193958Sfc1 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
284 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1923 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

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.

IssuedProductOfficeCountiesLasted
Jun 10, 6:00 PM MDTMesoscale DiscussionSPCDeer Lodge, Flathead, Glacier, Granite, Jefferson, Lake and 9 more2 hr
Jun 11, 11:30 AM MDTMesoscale DiscussionSPCCarter, Custer, Dawson, Fallon, Garfield, McCone and 7 more2 hr

Nearby

Mesoscale Discussions in Montana, 2003Every mesoscale discussion in 2003

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.