Alert archive / Washington / Mesoscale Discussions in 2014
Mesoscale Discussion 1555
The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2014, 3:48 PM MDT for 4 states. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2014, 3:48 PM MDT (21:48 UTC)
- Expired
- Aug 13, 2014, 5:45 PM MDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 45 counties
Adams County, ID, Benewah County, ID, Clark County, ID, Clearwater County, ID, Custer County, ID, Idaho County, ID, Kootenai County, ID, Latah County, ID, Lemhi County, ID, Lewis County, ID, Nez Perce County, ID, Shoshone County, ID, Valley County, ID, Washington County, ID, Beaverhead County, MT, Deer Lodge County, MT, Granite County, MT, Mineral County, MT, Ravalli County, MT, Baker County, OR, Crook County, OR, Gilliam County, OR, Grant 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, Douglas County, WA, Franklin County, WA, Garfield County, WA, Grant County, WA, Kittitas 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), 106 km from the middle of the area, began a volume at 21:49 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
Boise Airport, ID (KBOI), launched 12:00Z, 9.8 hours before the alert went out and 222 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.
- Mixed-layer CAPE
- 114 J/kg
- Mixed-layer CIN
- -245 J/kg
- Mixed-layer LCL
- 1811 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 6:11 PM MDT | Mesoscale Discussion | SPC | Benewah, Kootenai, Latah, Lewis, Nez Perce | 64 min |
| Aug 13, 12:44 PM MDT | Mesoscale Discussion | SPC | Gooding, Owyhee, Twin Falls | 2 hr |
| Aug 13, 1:21 PM MDT | Severe Thunderstorm Watch | SPC | Ada, Blaine, Camas, Cassia, Elmore, Gooding and 5 more | 7 hr |
| Aug 13, 4:26 PM MDT | Mesoscale Discussion | SPC | Bannock, Bingham, Blaine, Butte, Camas, Cassia and 8 more | 2 hr |
Nearby
Mesoscale Discussions in Washington, 2014Mesoscale Discussions in Idaho, 2014Mesoscale Discussions in Oregon, 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; radar from the NEXRAD Level II archive.