California and National Drought Summary for December 4, 2018, 10 Day Weather Outlook, and California Drought Statistics
The storm delivered heavy rain and mountain snow to the West, snow and wind to parts of the Plains and upper Midwest, and severe weather and tornadoes to the mid-Mississippi valley and Southeast coast.
The precipitation with this storm brought improvements to drought areas in parts of the Sierra Nevada and Central Valley and helped to relieve long-term deficits in parts of the Intermountain West and Plains.
The only change to this week’s map was a small reduction in the abnormally dry depiction in northern Maine, where recent precipitation has been enough to replenish moisture deficits.
This week’s rain improved short-term precipitation deficits, replenished soil moisture conditions, and alleviated moderate drought conditions in parts of Georgia, South Carolina, and northeast Florida.
Other than this moderate drought area, no other changes to drought were made, and the region remained drought free with the exception of the Texas Panhandle and northeast Oklahoma.
High Plains Moderate to heavy precipitation from this weekend’s storm, in the forms of rain and wind driven snow, fell roughly from the western reaches of the Dakotas to the northern half of Kansas.
Moderate drought and abnormal dryness remain in those areas still experiencing low groundwater levels, soil moisture shortages, and long-term precipitation deficits.
Below normal rainfall in Puerto Rico combined with spotty reports of low streamflow and groundwater data continue to support the depiction of D0 in the south central part of the Island.
In Alaska, precipitation in the drought affected areas of the Panhandle was not enough to reduce the long-term deficits.
In between these two storm systems, a ridge in the jet stream will deliver dry conditions to the Plains and Midwest.