All Weather News

2021 Monsoon Season Comes to a Close

2 Oct 2021, 4:00 am

2021 was a banner year for the monsoon season in the southwestern U.S. Monsoon season begins June 15th and runs through the end of September. The success of the monsoon has a lot to do with the atmospheric setup (above). As we tally up some of the numbers from this season, we had quite a few big winners! Monsoon storms can be such “hit and miss”, so areas like Albuquerque may have seen below average monsoonal rainfall, but a successful season in the state overall.  

At WeatherNation, we had the opportunity to speak with National Weather Service offices around the 4 Corners regions with more on how this season stacked up!

This year, Arizona had one of its most active monsoon seasons to date. Tucson had its third wettest season on record with more than twice the average amount of monsoonal rainfall! 

Heavy rainfall has drastically decreased the extreme and exceptional drought across the southwest. At the beginning of the season we had widespread extreme and exceptional drought across the area. 

Headed into the last week of September, you can see the improvements on drought made across the I-25 corridor in New Mexico and in Arizona. Some dryness has worked back into Colorado, and example that the monsoon doesn’t solve every precipitation problem.

Monsoon season increased cloud cover and rainfall, which helped reduce temperatures following record heat for the southwest early in the summer. In Phoenix, we saw nearly a record amount of rain-days during this year’s monsoon season. 

According to Marvin Percha, a Meteorologist for NWS Phoenix, “This June was the hottest June on record, July and August were both below normal, a big, welcomed change in that respect from this year’s active monsoon.”

Unfortunately, the heavy rain saturated the ground causing widespread deadly flash flooding, with over 20 deaths this season across the southwest United States. Hundreds of flash flood warnings were issued across the four-corners, especially over recent area burn scars.

Even though monsoon season officially ends on September 30th, Mother Nature can still bring heavy rain and flash flooding into the fall months.

About the author
Lucy is originally from the Boston area but has spent the last four years forecasting and living in Colorado! She stayed in the northeast for her education, graduating Summa Cum Laude from SUNY Oswego with a B.S. in Meteorology. Just a few days after graduation, she made the cross country move to Color... Load Moreado Springs, CO to begin her career at KKTV, the CBS affiliate. Lucy has covered historic blizzards, tornadoes, windstorms, the largest wildfires in Colorado state history and dust storms ... they truly "get it all" in Colorado! Lucy is excited to forecast on a national level and continue her passion of explaining the science behind the weather!