Alert archive / Idaho / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 21, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Sep 12, 2021, 6:17 PM MDT for Bear Lake County, Caribou County, Idaho. It was in force for 28 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 12, 2021, 6:17 PM MDT (00:17 UTC)
- Expired
- Sep 12, 2021, 6:45 PM MDT
- In force
- 28 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Bear Lake County, ID, Caribou County, ID
The radar
The Pocatello radar (KSFX), 136 km from the middle of the area, began a volume at 00:19 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, 0.3 hours before the alert went out and 202 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
- 642 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 2449 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted.
483
WUUS55 KPIH 130017
SVRPIH
IDC007-029-130045-
/O.NEW.KPIH.SV.W.0021.210913T0017Z-210913T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pocatello ID
617 PM MDT Sun Sep 12 2021
The National Weather Service in Pocatello has issued a
* Severe Thunderstorm Warning for...
Southeastern Caribou County in southeastern Idaho...
Northeastern Bear Lake County in southeastern Idaho...
* Until 645 PM MDT.
* At 616 PM MDT, a severe thunderstorm was located 7 miles northeast
of Georgetown, or 15 miles north of Montpelier, moving east at 25
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.
* Locations impacted include...
Clear Creek Ranger Station.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4244 11133 4262 11135 4267 11105 4243 11105
TIME...MOT...LOC 0016Z 264DEG 21KT 4254 11125
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DMH1 follow-up statement
290
WWUS55 KPIH 130045
SVSPIH
Severe Weather Statement
National Weather Service Pocatello ID
645 PM MDT Sun Sep 12 2021
IDC007-029-130055-
/O.EXP.KPIH.SV.W.0021.000000T0000Z-210913T0045Z/
Caribou ID-Bear Lake ID-
645 PM MDT Sun Sep 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CARIBOU AND
NORTHEASTERN BEAR LAKE COUNTIES HAS EXPIRED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.
LAT...LON 4244 11133 4262 11135 4267 11105 4243 11105
TIME...MOT...LOC 0045Z 264DEG 21KT 4256 11105
$$
DMHThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 6:32 PM MDT | Special Weather Statement | PIH | Oneida | 28 min |
| Sep 12, 7:11 PM MDT | Special Weather Statement | PIH | Caribou | 34 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.