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Severe Thunderstorms and Heavy Rainfall on the East Coast

Scattered severe thunderstorms may continue Friday over the Carolinas and along the East Coast north into parts of the Mid-Atlantic. Damaging wind gusts and a few tornadoes are the primary threats. Across the Southeast and Mid-Atlantic, localized flash and urban flooding impacts are possible due to potentially heavy rainfall, particularly over steep terrain and in vulnerable urban areas. Read More >

National Weather Service

National Oceanic and Atmospheric Administration

Weather Forecast Office

Sacramento

Wednesday, Jan 12, 2022

 

Fall 2021 Climate & Drought Summary

 

Water Year Precipitation (October - November) 

Water Year precipitation totals through November remained well above normal (Image 1). Most locations ranged from 150% to 200%+ of normal precipitation. In addition, the October 1st - November 30th period ranked among the Top 10 wettest on record for some locations including Downtown Sacramento, Fairfield, Stockton and Blue Canyon (Image 2). 

Image 1

Image 2

 

October 2021 ranked among the top wettest on record for several locations (Image 3).

Image 3

Extreme Atmospheric River in October 

A powerful atmospheric river event impacted interior NorCal from October 23rd-25th. The storm brought impressive precipitation totals that generally ranged from 3-6” in the Valley to over 13” in the mountains. Several locations set their all-time 24 hour rainfall record on October 25th, including Downtown Sacramento with 5.44” of rain (Image 4). 

Image 4

 

Strong North Wind Event & Critical Fire Weather Conditions

Strong, dry north winds were recorded on October 11th as a powerful storm moved through the region. Peak wind gusts in the Valley ranged from 40 to 50 mph, locally up to 55 mph (Image 5). These winds resulted in multiple reports of downed trees, power lines and power outages, as well as widespread critical fire weather conditions.

Image 5

Drought Conditions

According to the U.S. Drought Monitor, drought conditions improved across interior northern California given widespread heavy precipitation, favorable snowpack, moist soils, and improved reservoir levels. Most areas are still experiencing D2-Severe Drought or D3-Extreme Drought conditions (Image 6). The ongoing drought classifications are due to significant precipitation deficits from the 2020 and 2021 water years. 

Image 6