textproduct: Pocatello

KEY MESSAGES

- Impactful Frontal Passage: A cold front will sweep through the region tonight, causing snow levels to plummet to valley floors by Thursday morning.

- Winter Weather Headlines: Winter Weather Advisories remain in effect for the central mountains, the Island Park area, and the Bear River Range, where the heaviest snow is expected.

- Wind Advisory Today: Strong winds will develop this afternoon, with an advisory in effect for the Arco Desert and Lemhi Highlands.

- Hard Freeze Potential: A Freeze Watch has been issued for the Magic Valley, Snake Plain, Arco Desert and Shoshone zones for Friday morning with a widespread Hard Freeze looking likely.

- Strong Warming Trend: Following the midweek cold snap, a significant warm-up is forecast for the weekend, with temperatures rising well above seasonal norms by Sunday.

DISCUSSION

Issued at 224 AM MDT Wed Apr 15 2026

An active weather period is now underway across Eastern Idaho as a robust Pacific system moves inland. Early morning satellite imagery captures an increase in cloud cover, with precipitation expected to overspread the central mountains within the next few hours before expanding across the remainder of the region throughout the day. Ahead of the cold front, southwesterly flow will tighten the pressure gradient, causing winds to reach Advisory levels across the Arco Desert and Lemhi Highlands. Elsewhere, breezy conditions will prevail with gusts generally holding in the 20 to 25 mph range. Precipitation today will largely manifest as rain below 6,500 feet, while the higher terrain begins to see light snow accumulations.

The primary forecast concern arrives tonight into early Thursday morning as a potent cold front blasts through Eastern Idaho. This transition will trigger a drastic drop in snow levels, bringing a changeover from rain to snow even for the lowest valley floors. Perhaps the most notable development in recent model data is a strong signal for a convergence band of precipitation to develop over the Snake Plain Thursday evening. This feature has resulted in an upward adjustment of forecast snowfall totals for the Snake Plain and surrounding areas. Meanwhile, Winter Weather Advisories continue for the higher terrain of the central mountains and eastern highlands, where travel impacts are most likely.

As the system exits to the east on Friday, the focus shifts to a significant hard freeze. A Freeze Watch has been issued for the growing regions of Eastern Idaho to account for the frigid air mass settling over the area Friday morning. This will be particularly impactful for any early-season blossoms or crops that have emerged during recent warm spells.

The outlook for the weekend is much more favorable, as high pressure builds back over the Intermountain West. A drastic warm-up is forecast to begin Saturday, with temperatures climbing well above seasonal normals by Sunday and continuing into early next week. Conditions should remain dry through the weekend before low-end precipitation chances return late Monday or Tuesday. While another weather system is poised to impact the area early next week, model guidance remains split on the timing and intensity, leaving significant uncertainty in the long-range forecast.

AVIATION /06Z TAFS THROUGH 06Z THURSDAY/

Issued at 1000 PM MDT Tue Apr 14 2026

A few mid to high level clouds will drift through overnight. Conditions worsening quickly tomorrow with light precipitation arriving in the morning. SUN will likely see IFR/MVFR conditions for a time tomorrow morning with some improvement by afternoon. Elsewhere, mainly looking at vfr conditions but windy.

PIH WATCHES/WARNINGS/ADVISORIES

Freeze Watch from late Thursday night through Friday morning for IDZ051>055. Wind Advisory from 11 AM this morning to 9 PM MDT this evening for IDZ052-067. Winter Weather Advisory from 6 PM this evening to 6 AM MDT Friday for IDZ060-066. Winter Weather Advisory until noon MDT Thursday for IDZ071>074.