The last few weeks have brought monsoonal moisture over most of the Four Corners region. Arizona, Colorado, New Mexico and Utah have also received a good amount of rain throughout the last week. In fact, the month of July was the wettest on record for some. The upper level pattern will remain favorable for more rain, but unfortunately the threat for flooding, in the Rockies and the Front Range.
Here are some July rainfall totals & rankings across SE AZ:
Picacho Peak: 6.76″/Wettest
Nogales 6N: 9.96″/2nd wettest
Sierra Vista: 6.48″/8th wettest
Ajo: 3.04″/10th wettest
Willcox: 4.61″/11th wettest
San Manuel: 4.07″/11th wettest
McNeal: 3.44″/34th wettest#azwx— NWS Tucson (@NWSTucson) August 2, 2021
For cities like Tucson, Arizona, July 2021 was the wettest month on record!
Where to expect rain today
As an upper level ridge builds into the southwestern United States we will take a brief break from all the monsoonal rain across states like Utah, Nevada and Arizona but an upper level low will linger over the Rocky Mountains to keep rain in the forecast for states like Colorado, Wyoming and New Mexico.
Flood Alerts
Flash flood watches are in place from Wyoming into Colorado and the I-25 corridor of New Mexico as additional rainfall could prompt flash flooding, especially over recent burn scars.
Excessive Rainfall Outlook
Excessive Rain Outlooks are centered along the I-25 corridor. Shaded areas could receive enough heavy rain to get brief flash flooding or debris flows. Never drive through flooded washes or water-covered roads!
Wednesday, additional rain may bring some issued to the southern I-25 corridor especially over the Raton Pass into New Mexico.
We will likely see 1-2″ of rainfall in any thunderstorm that develops but in some locations, up to 3″ of rain will be possible.
Forecast
We start to see monsoonal moisture migrate northwest of a surface trough and developing low-pressure center. Showers will develop thanks to recycled moisture for New Mexico and Colorado.
Storms will be most numerous in the afternoon and evening hours, bringing the threat of heavy rain and flooding. Rain will diminish in the overnight and morning.
