Alert archive / Idaho / Mesoscale Discussions in 2008

Mesoscale Discussion 2539

December 27, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Dec 27, 2008, 1:26 PM MST for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Dec 27, 2008, 1:26 PM MST (20:26 UTC)
Expired
Dec 27, 2008, 4:00 PM MST
In force
3 hr
Issued by
the Storm Prediction Center
All 23 counties

Adams County, ID, Benewah County, ID, Bonner County, ID, Clearwater County, ID, Idaho County, ID, Kootenai County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Shoshone County, ID, Valley County, ID, Washington County, ID, Mineral County, MT, Baker County, OR, Hood River County, OR, Union County, OR, Wallowa County, OR, Chelan County, WA, Ferry County, WA, Okanogan County, WA, Pend Oreille County, WA, Skamania County, WA, Stevens County, WA

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 8.4 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, Boise Airport, ID at 12:00Z on 2008-12-27Temperature 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, Boise Airport, ID at 12:00Z on 2008-12-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 square meters per square second.1939587897Sfc1 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
1107 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
403 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 Idaho, 2008Mesoscale Discussions in Washington, 2008Mesoscale Discussions in Oregon, 2008Every mesoscale discussion in 2008

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.