Alert archive / Idaho / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 22, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Oct 7, 2021, 2:35 PM MDT for Cassia County, Idaho. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Oct 7, 2021, 2:35 PM MDT (20:35 UTC)
- Expired
- Oct 7, 2021, 3:00 PM MDT
- In force
- 25 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Cassia County, ID
The radar
The Pocatello radar (KSFX), 146 km from the middle of the area, began a volume at 20:37 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
Elko, NV (KLKN), launched 12:00Z, 8.6 hours before the alert went out and 166 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
- 3 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
871
WUUS55 KPIH 072035
SVRPIH
IDC031-072100-
/O.NEW.KPIH.SV.W.0022.211007T2035Z-211007T2100Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pocatello ID
235 PM MDT Thu Oct 7 2021
The National Weather Service in Pocatello has issued a
* Severe Thunderstorm Warning for...
West central Cassia County in southeastern Idaho...
* Until 300 PM MDT.
* At 233 PM MDT, a severe thunderstorm was located 15 miles east of
Rogerson, or 20 miles west of Oakley Reservoir, moving east at 30
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will remain over mainly rural areas of
west central Cassia County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4233 11428 4233 11429 4237 11429 4242 11417
4242 11407 4246 11407 4249 11399 4225 11389
4219 11428
TIME...MOT...LOC 2033Z 256DEG 26KT 4228 11431
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
McKaughanThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 7, 1:36 PM MDT | Special Weather Statement | PIH | Bannock | 24 min |
| Oct 7, 2:02 PM MDT | Special Weather Statement | PIH | Bannock | 28 min |
| Oct 7, 2:04 PM MDT | Flash Flood Watch | PIH | Bear Lake, Caribou, Cassia, Franklin, Oneida | 33 hr |
| Oct 7, 2:40 PM MDT | Flash Flood Warning | PIH | Cassia | 2 hr |
| Oct 7, 3:00 PM MDT | Special Weather Statement | PIH | Cassia | 45 min |
| Oct 7, 3:54 PM MDT | Severe Thunderstorm Warning | PIH | Cassia | 51 min |
| Oct 7, 4:41 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Power | 34 min |
| Oct 7, 5:14 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Power | 31 min |
| Oct 7, 5:44 PM MDT | Special Weather Statement | PIH | Power | 31 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 2021Every severe thunderstorm warning in 2021
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.