The current NAM forecasts this morning bring the Pacific short-wave at 500 mb into the Southwest by Sunday morning (Sep. 22nd) - The forecasts above (500 mb) and below (700 mb) are valid at 5 am MST Sunday morning. Ahead of the 500 mb short wave the height gradients and winds at 700 mb become quite strong over northern Arizona, southern Nevada, and Utah.
The early WRF-GFS forecasts of 10 m winds across the Southwest indicate the possibility of a significant wind storm across the region. The forecast above on the 5.4 km grid is valid Saturday afternoon at 3 pm MST, and the forecast below is valid at 2 pm Sunday afternoon.
Below is the 10 m wind forecast valid at 2 pm Sunday from the 1.8 km grid. Very strong winds impact much of the Great Basin and Rim country as well Interstates 15, 70, and 40. Cross winds, if the forecasts verify, would be particularly strong along I-40. Blowing dust probable for areas that remained dry during last week's storms.
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