Alert archive / Montana / Mesoscale Discussions in 2003

Mesoscale Discussion 1415

June 19, 200327 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2003, 3:56 PM MDT for 27 counties in Montana. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jun 19, 2003, 3:56 PM MDT (21:56 UTC)
Expired: Jun 19, 2003, 5:30 PM MDT
In force: 94 min
Issued by: the Storm Prediction Center

All 27 counties

Beaverhead County, MT, Broadwater County, MT, Carbon County, MT, Cascade 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, Madison County, MT, Meagher County, MT, Missoula County, MT, Musselshell County, MT, Park County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT, Stillwater County, MT, Sweet Grass County, MT, Teton County, MT, Wheatland County, MT, Yellowstone County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 9.9 hours before the alert went out and 119 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: 1981 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -115 m²/s²
0-3 km storm-relative helicity: -11 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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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 7:17 PM MDT	Mesoscale Discussion	SPC	Flathead, Glacier, Lake, Lewis and Clark, Lincoln, Mineral and 4 more	88 min
Jun 19, 12:32 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Cascade, Deer Lodge, Flathead, Granite, Jefferson and 10 more	118 min
Jun 19, 1:05 PM MDT	Severe Thunderstorm Watch	SPC	Beaverhead, Broadwater, Deer Lodge, Gallatin, Granite, Jefferson and 9 more	6 hr
Jun 19, 5:46 PM MDT	Mesoscale Discussion	SPC	Cascade, Chouteau, Fergus, Hill, Judith Basin, Lewis and Clark and 6 more	59 min

Nearby

Mesoscale Discussions in Montana, 2003 Every 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.