Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

2013 South Dakota Tornadoes

Below is a plot of the tornadoes which occurred in South Dakota in 2013 (click to enlarge):

Below is a brief summary of the 2013 tornado season:

· 2013 was a relatively quiet year with only 14 tornadoes reported across the State

· Here is the breakdown of 2013 tornadoes by EF-Scale:

o EF0 = 11

o EF1 = 3

o EF2 = 0

o EF3 = 0

o EF4 = 0

o EF5 = 0

· South Dakota averages about 35 tornadoes per year (based on 2001-2010 data)

· South Dakota has now seen a below average number of tornadoes since 2010 (click to enlarge)

Below is the 10 year total of tornado fatalities by state (2001-2010):

Fortunately – South Dakota has not had a directly related tornado death since 1999! Hopefully that trend continues for years to come!

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