Alert archive / Oregon / Mesoscale Discussions in 2013
Mesoscale Discussion 1840
The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2013, 5:01 PM MDT for 13 counties in Idaho; 14 counties in Oregon; 8 counties in Washington. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2013, 5:01 PM MDT (23:01 UTC)
- Expired
- Sep 5, 2013, 6:30 PM MDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 35 counties
Ada County, ID, Adams County, ID, Boise County, ID, Canyon County, ID, Elmore County, ID, Gem County, ID, Idaho 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, Jefferson 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, Asotin County, WA, Benton County, WA, Columbia County, WA, Franklin County, WA, Garfield County, WA, Klickitat County, WA, Walla Walla County, WA, Yakima County, WA
The radar
The Pendleton radar (KPDT), 139 km from the middle of the area, began a volume at 23:01 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 11.0 hours before the alert went out and 227 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
- 97 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 1643 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 70 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 |
|---|---|---|---|---|
| Sep 4, 9:49 PM MDT | Mesoscale Discussion | SPC | Adams, Clearwater, Idaho, Latah, Lewis, Nez Perce and 2 more | 116 min |
| Sep 5, 1:06 PM MDT | Mesoscale Discussion | SPC | Ada, Adams, Canyon, Elmore, Gem, Owyhee and 2 more | 54 min |
| Sep 5, 1:35 PM MDT | Severe Thunderstorm Watch | SPC | Ada, Adams, Boise, Camas, Canyon, Clearwater and 12 more | 7 hr |
| Sep 5, 2:31 PM MDT | Mesoscale Discussion | SPC | Bannock, Bingham, Blaine, Bonneville, Butte, Caribou and 13 more | 119 min |
| Sep 5, 3:56 PM MDT | Severe Thunderstorm Watch | SPC | Bannock, Bingham, Blaine, Butte, Cassia, Clark and 7 more | 7 hr |
| Sep 5, 5:23 PM MDT | Mesoscale Discussion | SPC | King, Kitsap, Lewis, Mason, Pierce, Thurston | 97 min |
Nearby
Mesoscale Discussions in Oregon, 2013Mesoscale Discussions in Idaho, 2013Mesoscale Discussions in Washington, 2013Every mesoscale discussion in 2013
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.