textproduct: Pocatello

KEY MESSAGES

- Cold overnight lows continue for the next couple of mornings with another FREEZE WARNING in effect for this morning and a FREEZE WATCH in effect for tonight

- The potential for showers and even a few thunderstorms persists through end week

DISCUSSION

Issued at 300 AM MDT Tue Apr 28 2026

A trough of low pressure remains over the intermountain west. Within that trough is a low pressure center that is working through east Idaho early this morning. A few light showers moved through east Idaho during the overnight hours and will exit Idaho with the low early this morning. Expect enough diurnal instability for scattered light showers to redevelop this afternoon. Can't rule out a rumble of thunder as well. Most of this activity should diminish this evening. Once again another round of scattered showers is expected Wednesday afternoon with the trough still in place. Really isn't until at least Thursday and possibly even Friday when the trough finally slides enough east that we will be stable enough in the afternoon for dry weather through the entire day. Pesky cold temperatures at night continue as long as this trough hangs around. Even though the trough is weakening, which is allowing the temperatures to gradually warm, its a slow process. The threat for freeze will continue into Wednesday morning in most areas, although the eastern Magic Valley around Burley/Heyburn may stay warm enough to avoid freeze, but less likely further north around Shoshone. As we move into Thursday and Friday morning, temperatures will be borderline for freeze but could potentially support frost still. And we are seeing indications that areas of the eastern Snake River Plain along and east of I-15 may stay slightly warmer. It really isn't until Saturday morning when overnight temps hold in the upper 30s into the low 40s.

In the extended, we are still seeing some potential for precipitation Sunday onward as a low pressure system tries to undercut the ridge as it works in from the California coast. Temperatures in the extended do not look nearly as cold with this next system with its source region being the ocean instead of the arctic.

AVIATION /12Z TAFS THROUGH 12Z WEDNESDAY/

Issued at 300 AM MDT Tue Apr 28 2026

Showers are exiting east Idaho early this morning. Another round of showers will likely develop this afternoon and could encroach upon areas like IDA and DIJ. Not expecting significant impacts from the showers this afternoon, so will keep vfr conditions for today.

PIH WATCHES/WARNINGS/ADVISORIES

Freeze Warning until 9 AM MDT this morning for IDZ051>055. Freeze Watch from late tonight through Wednesday morning for IDZ051>054.