Please remember to stay updated with your local NWS offices and heed the advice of the local experts on severe weather dangers – even if it seems like the wrong time of year! Share and Discuss Your Local Weather From the deadly tornadoes in the Midwest December 10-11 and again December 15 to December wildfires in Colorado, these unseasonable weather conditions are starting to become the norm. (National Weather Service) By Paul Rogers. While the West Coast received one of its wettest Decembers on record, unusual weather also occurred throughout the rest of the nation. 2, 2021 is expected to continue through Wednesday, bringing up to 2 feet of new snow in the Sierra. By comparing the last week in December to the last week in November, we can see significantly improved conditions! Specifically looking at areas under Extreme and Exceptional Drought, we've had a combined improvement of 7.19% in December alone! Unusual December Weather The national drought monitor also reflects this West Coast precipitation with substantially improved drought conditions across the region. These December winter storms pushed the California state snowpack well above normal for January, with most locations reporting over 100% and a statewide average of 147% as of January 3, 2022. California Snowpack and the National Drought Monitor While this December rainfall total of 6.14 inches bests the unprecedented October 2021 monthly rainfall record, there wasn't a day in December that broke the record daily rainfall total of 3.99 inches on October 24. With lightning strikes reported as the system approached on December 12, maximum sustained winds reaching up to 32 mph on December 15, and a storm total of 3.01 inches of rain from December 12-16, this was an extremely active winter weather event. The intense winter storms that brought heavy rainfall to the region in the middle of the month clearly created additional active weather for many areas. After that, the temperature graph in My AcuRite® shows daytime high temperatures rarely broke 60 ☏ (15.5 ☌) throughout the rest of the month. Once it reaches the Bay Area, a 15 to 25 chance of isolated showers, as well as thunderstorms, are in the forecast across much of the region, with rain chances increasing to 20 to 30 by Monday. My AcuRite Atlas® home weather station captured this gradual temperature decline by also reporting the month's high temperature on December 1 at 70 ☏ (21.1 ☌). Compare Records to My Backyard Weather Station The NWS report below shows that some of these exceed the all-time December records, specifically for Salinas and Gilroy. Meanwhile, daytime high temperatures gradually dropped throughout the month, but not before many San Francisco Bay Area locations reported record high temperatures on December 1.
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