All Weather News

Monsoon Moisture Returns to Southwest

18 Sep 2021, 3:40 pm

Another round of monsoon moisture will make its way into the Southwest ahead of a cold front. Moisture will surge northward from the south and interact with warm air and lift on the east side of a low pressure in southern California. A few strong and severe storms will be possible today across Utah and Arizona with gusty winds as the primary threat.

A few storms around Salt Lake City may contain hail up to 1″ in diameter.


The rain and upper level energy will move across the Western Slope of the Rockies Saturday night. In addition to the rain, high elevation snow is possible as cold air catches up with the upper energy.

Widespread rain accumulation will be around half an inch to an inch, with locally higher totals of 2-3″ possible where multiple rounds of rain and storms move through. Flash flooding in canyons and washes is also possible on a very limited basis depending on where the heavy rain falls and then drains. Mountain peak snow will be a few inches at most.

Areas primed to receive this monsoon rain are in varying stages of drought, but the entire state of Utah is in drought categories 3-5. Western Colorado is also in significant drought. Any rain is beneficial rain in this part of the country! Drought is ongoing in Arizona and New Mexico, but those states have seen the biggest reductions in drought the last few months with the active monsoon season.

Monsoon season officially ends at the end of September.

You can get details on this topic, the cold front in the Northwest US and an update on fire conditions during the Western Regional Forecast at :50 past the hour, every hour!

About the author
Erik Kostrzewa was born and raised in the state of Michigan; spending much of his life in the suburbs of Detroit. Erik attended the University of Michigan and earned a Bachelor’s Degr... Load Moreee in Earth Systems Science and Engineering with a concentration in Meteorology. His first on-air job was straight out of college in Lansing, Michigan at WLNS-TV. After a few years, he moved an hour west to Grand Rapids to continue his career at FOX17 news. While in the heart of the lower peninsula, Erik covered a wide variety of challenging weather from lake-effect snow to derechos. Erik definitely has an interesting last name which comes from his Polish descent. If you are wondering how it is pronounced, the easiest way to say it is “Ka-Stree-Va”. Erik is thrilled to forecast on a national scale at WeatherNation and experience an even wider range of weather in Colorado! He is also looking forward to experiencing his first 14er on one of the many mountains in the state. Follow Erik on Twitter and Facebook!