... Dense fog advisory in effect until 10 am CST Friday...
The National Weather Service in Sioux Falls has issued a dense
fog advisory, which is in effect until 10 am CST Friday.
* Weather conditions... dense fog will become widespread this
evening, and continue into mid-morning Friday before gradually
diminishing from the south. Visibilities will be periodically a
quarter mile or less.
A dense fog advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving... slow down...
use your headlights... and leave plenty of distance ahead of you.
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Dense Fog Advisory
Issued: 3:28 PM CST Jan. 19, 2017 – National Weather Service