Freeze Warning in Effect for Eastern Idaho Through Thursday Morning, Hard Freeze Expected Overnight into Saturday
NWS Pocatello Issues Freeze Warning for Bonneville County and Surrounding Areas
IDAHO FALLS, Idaho — A Freeze Warning issued by the National Weather Service office in Pocatello, Idaho, is in effect through 10:00 AM MDT on Thursday, April 17, covering a wide swath of Eastern Idaho including the Upper Snake River Plain, where Idaho Falls, Ammon, Iona, and Ucon are located. The warning was issued at 12:37 AM MDT and calls for sub-freezing temperatures between 18 and 22 degrees — conditions the NWS classifies as a Hard Freeze.
Residents across Bonneville County and neighboring areas are being urged to take immediate steps to protect tender plants, gardens, and any unprotected outdoor plumbing before temperatures drop to dangerous lows. The spring season has brought renewed growth to local gardens and agricultural fields throughout East Idaho, making the timing of this freeze particularly damaging for those who may have already planted.
The warning covers several geographic areas, including the Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, Lower Snake River Plain, and the Upper Snake River Plain — a region that encompasses Idaho Falls and the broader Bonneville County area.
Second Hard Freeze Expected Overnight Thursday into Saturday
The cold threat does not end Thursday morning. The National Weather Service has also issued a second Freeze Warning set to go into effect from midnight Thursday night through 10:00 AM MDT on Saturday, April 19. That overnight period is forecast to bring lows between 20 and 27 degrees — another Hard Freeze event that could compound damage to crops and vegetation already stressed by the first round of freezing temperatures.
Back-to-back Hard Freeze events of this magnitude in mid-April are a significant concern for Bonneville County’s agricultural producers and homeowners alike. Fruit trees that have already begun to blossom, early-season vegetable gardens, and other cold-sensitive plantings face the highest risk. Agricultural losses from late-spring freezes can carry economic consequences for East Idaho farmers that extend well into the growing season.
Impacts listed by the NWS include: frost and freeze conditions that could kill crops and other sensitive vegetation, and possible damage to unprotected outdoor plumbing. Residents with exposed pipes, outdoor faucets, or irrigation systems connected to above-ground lines should take precautions before temperatures fall Thursday evening.
What Residents Should Do Now
Emergency management and weather officials recommend the following precautions ahead of both freeze events:
Cover tender plants: Use frost cloth, old bedsheets, or plastic sheeting to protect vegetation overnight. Remove coverings once temperatures rise above freezing each morning to allow sunlight and air circulation.
Bring potted plants indoors: Container plants are especially vulnerable because the roots lack the insulation of in-ground soil. Move them inside or into a garage until the freeze risk passes.
Protect outdoor plumbing: Disconnect and drain outdoor hoses. Insulate exposed pipes and consider shutting off exterior water sources if feasible. A burst pipe can cause significant property damage.
Check on vulnerable neighbors: Elderly residents and those without adequate heat should be checked on during periods of extreme cold. If you know someone who may need assistance, reach out now before temperatures drop.
East Idaho has seen its share of late-spring weather hazards in recent weeks. For those tracking other public safety developments in the region, investigators recently confirmed that Idaho’s Snake Fire near Rigby was sparked by an out-of-control controlled burn, a reminder that weather conditions play a significant role in public safety beyond just temperature events.
For the latest statewide weather and emergency preparedness information, visit Idaho News.
What Comes Next
Bonneville County residents should monitor National Weather Service updates closely through the weekend, as the second Freeze Warning extends into Saturday morning. Gardeners, farmers, and property owners are encouraged to take protective action Thursday before midnight when the second wave of freezing temperatures is expected to arrive. The NWS Pocatello office will issue updated forecasts and any additional alerts as conditions develop. Check local forecasts frequently and sign up for severe weather alerts to stay informed ahead of both freeze events.