Weather

Arizona Weather Alert: Showers and Thunderstorms to Impact Flagstaff Travel Thursday Night

BySaluda Standard Sentinel Team September 17, 2025September 17, 2025

FLAGSTAFF, Ariz. — Drivers across northern Arizona should brace for wet and unsettled conditions starting Thursday afternoon, with the National Weather Service in Flagstaff warning of showers and thunderstorms that may slow travel into Friday.

Showers Developing Thursday

A weak disturbance will move across the region Thursday, carrying a 10% chance of storms before noon, but activity is expected to increase later in the day. By Thursday evening, the likelihood of showers rises to 30%, bringing wet roads and slick conditions along Interstate 40.

Motorists traveling through Flagstaff and surrounding mountain communities should prepare for reduced visibility and sudden downpours. Winds may gust up to 18 mph, creating difficulties for high-profile vehicles.

Heavier Rain Expected Friday

The system strengthens on Friday, when showers are likely throughout the day. Thunderstorm activity is possible after 8 a.m., with highs near 74 degrees. Persistent rainfall may cause delays for morning commuters and disrupt outdoor activities.

Southwest winds up to 17 mph will add to travel challenges, especially on exposed stretches of I-40 where crosswinds are more noticeable.

Weekend Outlook

The weekend brings on-and-off storm chances, particularly during the afternoons on Saturday and Sunday. While forecasters do not expect widespread flooding, isolated downpours could create sudden slick spots on mountain roads and trails.

Thursday: High 79, scattered storms after 11 a.m., low 50.
Friday: High 74, showers likely, low 49.
Saturday: High 77, 30% storm chance, low 49.
Sunday: High 79, 20% storm chance, low 48.
Monday: High 83, sunny, low 51.

Clearer skies will return by Monday and Tuesday, bringing drier conditions and a warming trend.

Safety Precautions

Forecasters advise residents and visitors to carry rain gear, check road conditions before traveling, and be prepared for sudden delays. Hikers should use caution on trails, where wet rocks and mud may increase risks of slips and falls.

Officials note that weather alerts may be issued through the weekend as the system lingers.

Have you had travel plans disrupted by sudden Flagstaff storms before? Share your experiences and safety tips in the comments at SaludaStandard-Sentinel.com.

Saluda Standard Sentinel Team

The Saluda Standard-Sentinel Team represents the collective voice of our newsroom — covering urgent updates, official notices, and stories compiled by multiple reporters. Rooted in the South and committed to trusted local journalism, our team brings timely, community-first reporting to readers across South Carolina, North Carolina, and Georgia.