Alert archive / Idaho / Freeze Warnings in 2021
Freeze Warning 4, NWS Pocatello, ID
NWS Pocatello, ID issued this freeze warning at Sep 29, 2021, 9:58 AM MDT for 12 counties in Idaho. It took effect at Sep 30, 2021, 1:00 AM MDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 29, 2021, 9:58 AM MDT (15:58 UTC)
- In effect from
- Sep 30, 2021, 1:00 AM MDT
- Expired
- Sep 30, 2021, 9:25 AM MDT
- In force
- 8 hr
- Issued by
- NWS Pocatello, ID
Counties Bannock County, ID, Bingham County, ID, Blaine County, ID, Bonneville County, ID, Butte County, ID, Cassia County, ID, Fremont County, ID, Jefferson County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Power County, ID
The radar
The Pocatello radar (KSFX), 18 km from the middle of the area, began a volume at 15:56 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
Boise Airport, ID (KBOI), launched 12:00Z, 4.0 hours before the alert went out and 280 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
- 1395 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
364 WWUS75 KPIH 291558 NPWPIH URGENT - WEATHER MESSAGE National Weather Service Pocatello ID 958 AM MDT Wed Sep 29 2021 IDZ051>055-301200- /O.CAN.KPIH.FZ.W.0003.000000T0000Z-210929T1600Z/ /O.NEW.KPIH.FZ.W.0004.210930T0700Z-210930T1600Z/ Shoshone/Lava Beds-Arco/Mud Lake Desert-Upper Snake River Plain- Lower Snake River Plain-Eastern Magic Valley- Including the cities of Shoshone, Richfield, Carey, Mud Lake, INL, Craters of the Moon NM, Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, American Falls, Shelley, Fort Hall, Burley, Rupert, Heyburn, and Oakley 958 AM MDT Wed Sep 29 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 10 AM MDT THURSDAY... * WHAT...Sub-freezing temperatures as low as 24 especially across the Upper Snake and Arco Desert. In the lower Snake Plain and Magic Valley sub-freezing temperatures as low as 27. * WHERE...Upper and Lower Snake River Plain, Arco Desert, and the Eastern Magic Valley. * WHEN...From 1 AM to 10 AM MDT Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Overnight low temperatures tonight will likely result in a prolonged, hard-freeze, especially across the Upper Snake and Arco Desert, resulting in a season ending freeze event for the growing region. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ For more information from the National Weather Service visit https://weather.gov/pocatello
2 follow-up statements
753 WWUS75 KPIH 300742 NPWPIH URGENT - WEATHER MESSAGE National Weather Service Pocatello ID 142 AM MDT Thu Sep 30 2021 IDZ051>055-301600- /O.CON.KPIH.FZ.W.0004.000000T0000Z-210930T1600Z/ Shoshone/Lava Beds-Arco/Mud Lake Desert-Upper Snake River Plain- Lower Snake River Plain-Eastern Magic Valley- Including the cities of Shoshone, Richfield, Carey, Mud Lake, INL, Craters of the Moon NM, Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, American Falls, Shelley, Fort Hall, Burley, Rupert, Heyburn, and Oakley 142 AM MDT Thu Sep 30 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM MDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 24 especially across the Upper Snake and Arco Desert. In the lower Snake Plain and Magic Valley sub-freezing temperatures as low as 27. * WHERE...Upper and Lower Snake River Plain, Arco Desert, and the Eastern Magic Valley. * WHEN...Through 10 AM MDT Today. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Overnight low temperatures tonight will likely result in a prolonged, hard-freeze, especially across the Upper Snake and Arco Desert, resulting in a season ending freeze event for the growing region. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ For more information from the National Weather Service visit https://weather.gov/pocatello
947 WWUS75 KPIH 301525 NPWPIH URGENT - WEATHER MESSAGE National Weather Service Pocatello ID 925 AM MDT Thu Sep 30 2021 IDZ051>055-301630- /O.CAN.KPIH.FZ.W.0004.000000T0000Z-210930T1600Z/ Shoshone/Lava Beds-Arco/Mud Lake Desert-Upper Snake River Plain- Lower Snake River Plain-Eastern Magic Valley- Including the cities of Shoshone, Richfield, Carey, Mud Lake, INL, Craters of the Moon NM, Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, American Falls, Shelley, Fort Hall, Burley, Rupert, Heyburn, and Oakley 925 AM MDT Thu Sep 30 2021 ...FREEZE WARNING IS CANCELLED... Temperatures have risen above freezing and will continue to rise through the morning, therefore the freeze warning is being canceled at this time. The last two mornings of prolonged sub- freezing temperatures have resulted in an end to the official growing season. Therefore, no more frost/freeze products will be issued this year. $$ For more information from the National Weather Service visit https://weather.gov/pocatello
Nearby
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.