Alert archive / Idaho / Snow Squall Warnings in 2021
Snow Squall Warning 5, NWS Pocatello, ID
NWS Pocatello, ID issued this snow squall warning at Dec 26, 2021, 1:34 PM MST for 9 counties in Idaho. It was in force for 26 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
- Dec 26, 2021, 1:34 PM MST (20:34 UTC)
- Expired
- Dec 26, 2021, 2:00 PM MST
- In force
- 26 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
Counties Bannock County, ID, Bear Lake County, ID, Bingham County, ID, Bonneville County, ID, Caribou County, ID, Franklin County, ID, Jefferson County, ID, Madison County, ID, Teton County, ID
The radar
The Pocatello radar (KSFX), 104 km from the middle of the area, began a volume at 20:35 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 12:00Z, 8.6 hours before the alert went out and 228 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1198 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 356 m²/s²
- 0-3 km storm-relative helicity
- 385 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
028
WWUS55 KPIH 262034
SQWPIH
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Pocatello ID
134 PM MST Sun Dec 26 2021
IDC005-007-011-019-029-041-051-065-081-262100-
/O.NEW.KPIH.SQ.W.0005.211226T2034Z-211226T2100Z/
Teton ID-Caribou ID-Jefferson ID-Bannock ID-Bonneville ID-Madison ID-
Franklin ID-Bear Lake ID-Bingham ID-
134 PM MST Sun Dec 26 2021
The National Weather Service in Pocatello has issued a
* Snow Squall Warning for...
Teton County in eastern Idaho...
Caribou County in southeastern Idaho...
Southeastern Jefferson County in southeastern Idaho...
Southeastern Bannock County in southeastern Idaho...
Bonneville County in southeastern Idaho...
Madison County in southeastern Idaho...
Franklin County in southeastern Idaho...
Bear Lake County in southeastern Idaho...
East central Bingham County in southeastern Idaho...
* Until 200 PM MST.
* At 130 PM MST, a dangerous snow squall was located along a line
extending from 9 miles southwest of Drummond to near Palisades
Reservoir to 9 miles west of Montpelier to 7 miles northwest of
Clarkston, moving east at 50 mph.
HAZARD...Extremely poor visibility in snow and blowing snow. Wind
gusts greater than 45 mph at times.
SOURCE...Radar and webcams.
IMPACT...Dangerous life-threatening travel.
* This will impact U-S 26 from Idaho Falls to the Wyoming border,U-S
91 from Interstate 15 to the Utah border, U-S 89 around Bear Lake,
and U-S 30 from Fish Creek Summit to the Wyoming border. This will
also impact several state highways east of Interstate 15 as well.
Locations impacted include...
Rexburg, Preston, Soda Springs, Montpelier, Driggs, Swan Valley,
Felt, Ririe, Blackfoot Reservoir, Wayan, Palisades Reservoir, Bear
Lake, Victor, Grace, Georgetown, and Tetonia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
&&
LAT...LON 4200 11105 4202 11205 4310 11174 4382 11193
4391 11105
TIME...MOT...LOC 2030Z 251DEG 43KT 4387 11142 4320 11113 4235 11149
4202 11212
$$
Keyes1 follow-up statement
848
WWUS55 KPIH 262057
SQWPIH
Snow Squall Warning
National Weather Service Pocatello ID
157 PM MST Sun Dec 26 2021
IDC005-007-011-019-029-041-051-065-081-262106-
/O.EXP.KPIH.SQ.W.0005.000000T0000Z-211226T2100Z/
Teton ID-Caribou ID-Jefferson ID-Bannock ID-Bonneville ID-Madison ID-
Franklin ID-Bear Lake ID-Bingham ID-
157 PM MST Sun Dec 26 2021
...THE SNOW SQUALL WARNING FOR TETON...CARIBOU...SOUTHEASTERN
JEFFERSON...SOUTHEASTERN BANNOCK...BONNEVILLE...MADISON...FRANKLIN...
BEAR LAKE AND EAST CENTRAL BINGHAM COUNTIES WILL EXPIRE AT 200 PM
MST...
The snow squall which prompted the warning has moved out of the
warned area. Therefore, the snow squall warning will be allowed to
expire. Gusty winds along with some blowing snow will persist behind
the squall.
LAT...LON 4200 11105 4202 11205 4310 11174 4382 11193
4391 11105
TIME...MOT...LOC 2056Z 251DEG 43KT 4396 11105 4329 11076 4244 11113
4211 11176
$$
KeyesThe office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 26, 3:59 AM MST | Snow Squall Warning | PIH | Bingham, Blaine, Cassia, Minidoka, Power | 61 min |
| Dec 26, 11:59 AM MST | Special Weather Statement | PIH | Bannock, Bingham, Bonneville, Caribou, Franklin, Jefferson and 3 more | 76 min |
| Dec 26, 12:40 PM MST | Snow Squall Warning | PIH | Bannock, Bear Lake, Bingham, Bonneville, Butte, Caribou and 7 more | 50 min |
Nearby
Snow Squall Warnings in Idaho, 2021Every snow squall 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.