Dennis Mattinson’s Weather Forecast for Monday and Tuesday

Rain? Sounds “doggone” good to me!

WEATHER: The Owens Valley / The Town of Mammoth Lakes 

TUE MAR 02 2021 4:18 AM PST

SYNOPSIS: A quick moving closed low will shift a weak EPAC ridge axis East, with increased cloud cover and a slight chance of showers in Mammoth late Wednesday into Thursday. Mammoth looks to get maybe an inch or two on the Mountain and the peaks around June Lake, 1 – 3 inches. That system wobbles east, dropping a little snow over the San Juan Mountains of Colorado. High pressure then returns late Thursday, bringing a spell of mild and dry weather through Friday. There are signs of a pattern change this weekend, as high pressure gets bumped by a developing EPAC low. Unsettled weather looks likely heading into next week. Stay tuned as I iron out the details…DMATT



Today: Becoming sunny. 61 / 27.

Wednesday: Partly sunny > cloudy 59 / 26.


Today: Mostly sunny > mostly cloudy. 44 / 19.
Wednesday: Becoming cloudy > 30% PM snow showers. 41 / 18.

(Dennis’ Probability of Precipitation: 10% – Unlikely; 20% – Slight; 30 – 50% – Chance; 60 – 80% – Likely; 90 – 100% – Certain)

About Dennis Mattinson

Dennis Mattinson was an EPA Program Director and an Air Quality Specialist. He specialized in the monitoring, measurement and movement of particulate matter 2.5 and 10 microns in size (known as PM-2.5 and PM-10). He also specializes in weather forecasting of the Owens Valley and Mammoth Lakes, giving him the edge in accurate Eastern Sierra weather. Dennis was trained by the EPA and the NWS of Las Vegas to forecast meteorological parameters, to better understand PM-10 migration through-out the Owens Valley and Mono County. He began forecasting on the radio (92.5 / 96.5 FM SierraWave Media) in 2007. In 2008, TV-33 began using his local forecasts for broadcasts throughout the area. Locals and tourists from all over the world use his weather information to plan their trips, including mountain climbers and other adventurers. The movie “Iron Man” used his forecasts in their aerial filming of the mountains around the Alabama Hills.

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