Alert archive / Oregon / Mesoscale Discussions in 2017

Mesoscale Discussion 1153

June 26, 201715 counties in Idaho; 17 counties in Oregon; 13 counties in Washington

The Storm Prediction Center issued this mesoscale discussion at Jun 26, 2017, 2:12 PM MDT for 15 counties in Idaho; 17 counties in Oregon; 13 counties in Washington. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 26, 2017, 2:12 PM MDT (20:12 UTC)
Expired: Jun 26, 2017, 4:45 PM MDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 45 counties

Ada County, ID, Adams County, ID, Benewah County, ID, Boise County, ID, Canyon County, ID, Elmore County, ID, Gem County, ID, Idaho County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Owyhee County, ID, Payette County, ID, Valley County, ID, Washington County, ID, Baker County, OR, Crook County, OR, Deschutes County, OR, Gilliam County, OR, Grant County, OR, Harney County, OR, Jackson County, OR, Jefferson County, OR, Klamath County, OR, Malheur County, OR, Morrow County, OR, Sherman County, OR, Umatilla County, OR, Union County, OR, Wallowa County, OR, Wasco County, OR, Wheeler County, OR, Adams County, WA, Asotin County, WA, Benton County, WA, Columbia County, WA, Franklin County, WA, Garfield County, WA, Grant County, WA, Klickitat County, WA, Lincoln County, WA, Spokane County, WA, Walla Walla County, WA, Whitman County, WA, Yakima County, WA

The radar

The Pendleton radar (KPDT), 192 km from the middle of the area, began a volume at 20:15 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

Salem/Mcnary, OR (KSLE), launched 12:00Z, 8.2 hours before the alert went out and 353 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: 1211 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: -6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Oregon, 2017 Mesoscale Discussions in Idaho, 2017 Mesoscale Discussions in Washington, 2017 Every mesoscale discussion in 2017

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.