Alert archive / Idaho / Mesoscale Discussions in 2022
Mesoscale Discussion 1813
The Storm Prediction Center issued this mesoscale discussion at Sep 21, 2022, 12:20 PM MDT for 19 counties in Idaho; Cache County, Rich County, Utah. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Sep 21, 2022, 12:20 PM MDT (18:20 UTC)
- Expired
- Sep 21, 2022, 1:45 PM MDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 60%
All 21 counties
Ada County, ID, Bannock County, ID, Bear Lake County, ID, Bingham County, ID, Blaine County, ID, Butte County, ID, Camas County, ID, Caribou County, ID, Cassia County, ID, Elmore County, ID, Franklin County, ID, Gooding County, ID, Jerome County, ID, Lincoln County, ID, Minidoka County, ID, Oneida County, ID, Owyhee County, ID, Power County, ID, Twin Falls County, ID, Cache County, UT, Rich County, UT
The radar
The Pocatello radar (KSFX), 94 km from the middle of the area, began a volume at 18:21 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 6.3 hours before the alert went out and 247 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
- 52 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 2043 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 113 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 |
|---|---|---|---|---|
| Sep 21, 12:40 PM MDT | Severe Thunderstorm Watch | SPC | Bannock, Bear Lake, Bingham, Blaine, Boise, Bonneville and 19 more | 8 hr |
| Sep 21, 2:47 PM MDT | Mesoscale Discussion | SPC | Bannock, Bear Lake, Bingham, Blaine, Bonneville, Butte and 17 more | 88 min |
| Sep 21, 11:26 AM MDT | Mesoscale Discussion | SPC | Beaver, Box Elder, Davis, Iron, Juab, Millard and 3 more | 2 hr |
| Sep 21, 12:19 PM MDT | Severe Thunderstorm Watch | SPC | Beaver, Box Elder, Cache, Davis, Iron, Juab and 13 more | 8 hr |
| Sep 21, 1:56 PM MDT | Mesoscale Discussion | SPC | Beaver, Box Elder, Cache, Davis, Garfield, Iron and 13 more | 94 min |
Nearby
Mesoscale Discussions in Idaho, 2022Mesoscale Discussions in Utah, 2022Every mesoscale discussion in 2022
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.