Alert archive / Idaho / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 17, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Sep 2, 2021, 8:43 PM MDT for Caribou County, Idaho. It was in force for 32 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
- Sep 2, 2021, 8:43 PM MDT (02:43 UTC)
- Expired
- Sep 2, 2021, 9:15 PM MDT
- In force
- 32 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Caribou County, ID
The radar
The Pocatello radar (KSFX), 121 km from the middle of the area, began a volume at 02:43 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, 2.7 hours before the alert went out and 225 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
- 942 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 2400 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted.
183 WUUS55 KPIH 030243 SVRPIH IDC029-030315- /O.NEW.KPIH.SV.W.0017.210903T0243Z-210903T0315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Pocatello ID 843 PM MDT Thu Sep 2 2021 The National Weather Service in Pocatello has issued a * Severe Thunderstorm Warning for... East central Caribou County in southeastern Idaho... * Until 915 PM MDT. * At 842 PM MDT, a severe thunderstorm was located 13 miles southeast of Henry, or 13 miles northeast of Soda Springs, moving east at 25 MPH. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Diamond Creek Campground and Smokey Canyon Mine. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. If you observe severe weather, including hail or wind damage, please report your observations to the National Weather Service in Pocatello via phone at 208-233-0834, or via social media. && LAT...LON 4266 11144 4285 11144 4293 11104 4265 11105 TIME...MOT...LOC 0242Z 262DEG 21KT 4275 11134 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ KSmith
2 follow-up statements
524 WWUS55 KPIH 030258 SVSPIH Severe Weather Statement National Weather Service Pocatello ID 858 PM MDT Thu Sep 2 2021 IDC029-030315- /O.CON.KPIH.SV.W.0017.000000T0000Z-210903T0315Z/ Caribou ID- 858 PM MDT Thu Sep 2 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR EAST CENTRAL CARIBOU COUNTY... At 857 PM MDT, a severe thunderstorm was located 14 miles southwest of Star Valley Rest Area, or 14 miles west of Afton, moving east at 25 MPH. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Diamond Creek Campground and Smokey Canyon Mine. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. If you observe severe weather, including hail or wind damage, please report your observations to the National Weather Service in Pocatello via phone at 208-233-0834, or via social media. && LAT...LON 4266 11132 4286 11134 4293 11104 4265 11105 TIME...MOT...LOC 0257Z 262DEG 21KT 4276 11122 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ KSmith
038
WWUS55 KPIH 030316
SVSPIH
Severe Weather Statement
National Weather Service Pocatello ID
916 PM MDT Thu Sep 2 2021
IDC029-030325-
/O.EXP.KPIH.SV.W.0017.000000T0000Z-210903T0315Z/
Caribou ID-
916 PM MDT Thu Sep 2 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CARIBOU COUNTY
HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area into Wyoming. Therefore, the
warning has been allowed to expire.
If you observed severe weather, including hail or wind damage,
please report your observations to the National Weather Service in
Pocatello via phone at 208-233-0834, or via social media.
LAT...LON 4266 11132 4286 11134 4293 11104 4265 11105
TIME...MOT...LOC 0315Z 262DEG 21KT 4277 11108
$$
KSmithThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 7:18 PM MDT | Special Weather Statement | PIH | Caribou | 42 min |
| Sep 2, 7:55 PM MDT | Special Weather Statement | PIH | Caribou | 35 min |
| Sep 2, 8:20 PM MDT | Severe Thunderstorm Warning | PIH | Caribou | 25 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.