Arizona’s high‑desert valleys and plateaus will face a series of weather warnings on Thursday and Friday, covering the Little Colorado River Valley and surrounding highlands.. The alerts, issued by the National Weather Service, span both Mountain Standard Time (MST) and Mountain Daylight Time (MDT) zones, warning residents and travelers of hazardous conditions throuh the evenings.

Thursday’s 11 am‑8 pm MST warning for Little Colorado River Valley

The first advisory runs from 11:00 AM to 8:00 PM MST on Thursday and targets the Little Colorado River Valley across Coconino, Apache and Navajo counties. According to the report, the warning reflects a “significant atmospheric event” that could bring rapid weather changes in the low‑lying valley.

Officials advise people in the valley to monitor updates , especially those traveling on local roads that may become slick or experience reduced visibility.

Friday’s extended advisory across Chuska Mountains and Defiance Plateau

On Friday, a separte advisory from 12:00 PM to 9:00 PM MDT expands coverage to the Chuska Mountains, Defiance Plateau, Black Mesa, and the Northeast Plateaus near Highway 264, as well as the Chinle Valley. The source notes that this zone sits in a diffeernt time zone, underscoring the complexity of Arizona’s topography.

Travelers on Highway 264 are urged to expect possible road closures or delays, and local authorities are preparing to issue real‑time traffic updates.

Mogollon Rim and White Mountains added to Friday’s MST alert

A broader Friday warning from 11:00 AM to 8:00 PM MST adds the White Mountains, eastern and western sections of the Mogollon Rim, and again the Little Colorado River Valley. According to the source, the overlapping alerts suggest a “widespread system” affecting northern and eastern Arizona.

The Mogollon Rim, a popular recreation area, may see suden gusts and reduced visibility, prompting park officials to advise hikers to stay on marked trails.

Unclear timing of hazardous conditions on Highway 264

While the advisories specify start and end times, the exact onset of hazardous conditions on Highway 264 remains uncertain. the report highlights that “residents and travelers should monitor updates,” indicating that conditions could develop earlier than the official window.

This lack of precise timing leaves emergency responders and commuters with limited preparatiion windows, a point that local officials have yet to clarify.

Who will coordinate the multi‑county response?

The source does not identify a single coordinating agency for the overlapping warnings across four counties and multiple time zones. it is unclear whether state emergency management, county sheriffs, or the National Weather Service will take the lead, leaving a gap in public communication.