Special Weather Statement issued September 18 at 12:17AM MDT by NWS Pocatello ID

**Special Weather Statement issued September 18 at 12:17AM MDT by NWS Pocatello ID**

At 1216 AM MDT, Doppler radar was tracking a cluster of strong thunderstorms 13 miles east of Bone, or 17 miles southwest of Swan Valley, moving northeast at 25 mph.

HAZARD...Wind gusts in excess of 35 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to outdoor objects is possible.

Locations impacted include... Driggs, Swan Valley, Ririe Reservoir, northern Palisades Reservoir, Victor, Irwin, Bone, Green Canyon Hot Springs, Heise, Pine Creek Pass, and Grays Lake.

**What You Should Do:**

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways.

Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.

**Alert Details:**

- **Severity:** Moderate

- **Urgency:** Expected

- **Issued by:** NWS Pocatello ID

- **Effective:** Sep 18, 2026 12:17 AM UTC

- **Expires:** Sep 18, 2026 1:00 AM UTC

*This alert was automatically distributed from the National Weather Service via the IPAWS All-Hazards Information Feed.*