Alert archive / Idaho / Mesoscale Discussions in 2020
Mesoscale Discussion 1587
The Storm Prediction Center issued this mesoscale discussion at Aug 26, 2020, 7:04 PM MDT for 23 counties in Idaho; 6 counties in Montana. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Aug 26, 2020, 7:04 PM MDT (01:04 UTC)
- Expired
- Aug 26, 2020, 9:00 PM MDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 5%
All 29 counties
Ada County, ID, Bingham County, ID, Blaine County, ID, Boise County, ID, Butte County, ID, Camas County, ID, Canyon County, ID, Cassia County, ID, Clark County, ID, Custer County, ID, Elmore County, ID, Fremont County, ID, Gem County, ID, Gooding County, ID, Jefferson County, ID, Jerome County, ID, Lemhi County, ID, Lincoln County, ID, Minidoka County, ID, Owyhee County, ID, Payette County, ID, Twin Falls County, ID, Valley County, ID, Beaverhead County, MT, Deer Lodge County, MT, Gallatin County, MT, Madison County, MT, Park County, MT, Silver Bow County, MT
The radar
The Pocatello radar (KSFX), 142 km from the middle of the area, began a volume at 01:07 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
Salt Lake City I, UT (KSLC), launched 00:00Z, 1.1 hours before the alert went out and 399 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
- 102 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 3605 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 1:27 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carter, Custer, Powder River, Rosebud | 3 hr |
| Aug 27, 4:52 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Fallon, Powder River, Wibaux | 83 min |
| Aug 27, 5:31 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Custer, Dawson, Fallon, Powder River, Prairie and 1 more | 7 hr |
Nearby
Mesoscale Discussions in Idaho, 2020Mesoscale Discussions in Montana, 2020Every mesoscale discussion in 2020
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.