Alert archive / Oregon / Mesoscale Discussions in 2008

Mesoscale Discussion 88

January 26, 200811 counties in Oregon; 5 counties in Washington

The Storm Prediction Center issued this mesoscale discussion at Jan 26, 2008, 4:21 PM PST for 11 counties in Oregon; 5 counties in Washington. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jan 26, 2008, 4:21 PM PST (00:21 UTC)
Expired: Jan 26, 2008, 9:15 PM PST
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Clackamas County, OR, Gilliam County, OR, Hood River County, OR, Lane County, OR, Linn County, OR, Marion County, OR, Morrow County, OR, Multnomah County, OR, Sherman County, OR, Umatilla County, OR, Wasco County, OR, Benton County, WA, Columbia County, WA, Franklin County, WA, Klickitat County, WA, Walla Walla County, WA

The radar

The Pendleton radar (KPDT), 129 km from the middle of the area, began a volume at 00:24 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, 0.4 hours before the alert went out and 394 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: 446 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 362 m²/s²
0-3 km storm-relative helicity: 421 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
Jan 27, 4:51 AM PST	Mesoscale Discussion	SPC	Baker, Morrow, Umatilla, Union, Wallowa	5 hr
Jan 27, 9:53 AM PST	Mesoscale Discussion	SPC	Douglas, Jackson, Josephine, Lane, Linn, Marion	6 hr

Nearby

Mesoscale Discussions in Oregon, 2008 Mesoscale Discussions in Washington, 2008 Every 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; radar from the NEXRAD Level II archive.