textproduct: Pocatello

KEY MESSAGES

- Widespread frost/freeze conditions persist through Wednesday

- Temperatures continue to warm toward ABOVE AVERAGE throughout the week

- Best chance of showers and thunderstorms will be later Wednesday and Thursday

DISCUSSION

Issued at 1145 PM MDT Mon May 18 2026

A few early morning showers or sprinkles remain across the Magic Valley and Albion Mountains. Those should be gone by sunrise. Another round of isolated showers/sprinkles develops this afternoon and evening across most of the central mountains and along the Montana border. It also appears a few showers are possible across higher elevations south of the Snake Plain. The chance of thunderstorms is almost non-existent, but we also cannot completely rule it out across the central mountains. This should shift east diminish before midnight. We will see another break until Wednesday afternoon, when the next low begins to drop closer to eastern Idaho and we see an initial round of showers and storms develop. This storm slowly swings through on Thursday. Precipitation amounts don't appear impressive, although there are some trends that we could see some pockets of heavier precipitation involving any thunderstorms or bands developing. Snow is possible across the higher peaks and ridgelines on Thursday. Temperatures remain a bit BELOW AVERAGE today before warming to NEAR AVERAGE tomorrow and Thursday. Overnight lows will remain cold especially with not much cloud cover and lighter winds. Our FREEZE WARNING and FROST ADVISORY remain in place for this morning, and we will need another set of headlines for Wednesday morning. Cloud cover and precipitation will keep overnight lows more mild Thursday morning. Another thing of note for Thursday, we may need a LAKE WIND ADVISORY as northerly winds kick in and may be enough for choppy conditions on American Falls Reservoir.

The rest of the week and weekend look fairly dry, although we do see a couple of very weak lows sweeping across the state which could kick off a few showers or storms here and there. Temperatures jump quite a bit, with 70s and 80s returning Saturday-Monday. It does look a bit more breezy during that stretch as well. We should see another low drop south across the state by Tuesday, with cooler temperatures and an uptick in showers and storms.

AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/

Issued at 957 PM MDT Mon May 18 2026

Winds look light through tomorrow. Some mid cloud around SUN, BYI and PIH should dissipate overnight. SUN will probably switch to upvalley around midday, think a crosswind is unlikely in the afternoon with winds as light as they are.

PIH WATCHES/WARNINGS/ADVISORIES

Frost Advisory from 3 AM to 9 AM MDT Tuesday for IDZ051-055. Freeze Warning until 9 AM MDT Tuesday for IDZ052>054.