Another day of monsoon season, and we're looking at a broader area of increased Flash Flood risk as moisture and dynamic support expand somewhat north and east today. The Flood Watch for flash flooding has been updated accordingly. Read on for a little more info... #utwx (1/4) Here's one model's representation of how convective activity could play out throughout the day and evening. Given the cloud cover and convective inhibition in place, the delayed start of more significant convection (likely not until 1-2PM) appears appropriate. (2/4)

1/9 To shed some light on the science, here's a schematic look at the structure of a downslope wind event along the Wasatch Front. For more detail on this graphic and the setup for this impactful event, keep reading... #utwx 2/9 The September 2020 wind storm was a complex meteorological event combining elements of strong synoptic winds associated with deep low pressure system with components of a classic downslope wind event. It was this combination that led to a widespread, long-duration event #utwx

1/7 It is the first anniversary of the 2020 Downslope Wind Storm that impacted much of northern Utah. This event goes down as one of the most widespread, impactful weather events the state has experienced in many years. This thread details some of the impacts. #utwx 2/7 Here are the peak wind gusts for the event across northern Utah. Wind gusts as high as 99 mph were reported (with unofficial reports near the U over 100 mph).

1/8 For those wondering why the mountains are no escape from the smoke these days... One key difference between our wintertime valley pollution and summertime smoke is the presence or lack of a stable layer in the form of a temperature inversion. #utwx 2/8 This oversimplified graphic shows how the stable layer/temperature inversion creates a cap that traps a shallow layer of pollution near the surface in winter, while under warm and well mixed summer conditions, these pollutants (like smoke) are distributed throughout.