Alert archive / Oregon / Mesoscale Discussions in 2014

Mesoscale Discussion 1430

July 22, 20144 counties in Idaho; 10 counties in Oregon; Asotin County, Washington

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2014, 1:23 PM PDT for 4 counties in Idaho; 10 counties in Oregon; Asotin County, Washington. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 22, 2014, 1:23 PM PDT (20:23 UTC)
Expired
Jul 22, 2014, 3:00 PM PDT
In force
97 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Clearwater County, ID, Latah County, ID, Lewis County, ID, Nez Perce County, ID, Crook County, OR, Gilliam County, OR, Grant County, OR, Jefferson County, OR, Morrow County, OR, Umatilla County, OR, Union County, OR, Wallowa County, OR, Wasco County, OR, Wheeler County, OR, Asotin County, WA

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 8.4 hours before the alert went out and 265 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, Spokane, WA at 12:00Z on 2014-07-22Temperature 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, Spokane, WA at 12:00Z on 2014-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 151 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2643 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
151 m²/s²
0-3 km storm-relative helicity
166 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.

IssuedProductOfficeCountiesLasted
Jul 22, 1:49 PM PDTMesoscale DiscussionSPCLemhi86 min
Jul 22, 4:45 PM PDTMesoscale DiscussionSPCCrook, Deschutes, Grant, Harney, Jackson, Klamath and 1 more3 hr

Nearby

Mesoscale Discussions in Oregon, 2014Mesoscale Discussions in Idaho, 2014Mesoscale Discussions in Washington, 2014Every mesoscale discussion in 2014

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.