St. Louis Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Dense Fog Advisory
Issued: 3:40 AM CST Feb. 22, 2017 – National Weather Service

... Dense fog advisory remains in effect until 9 am CST this
morning...

* timing... fog will persist through this morning.

* Visibilities... visibilities of one-quarter mile or less at
times are expected.

* Impacts... rapid changes in visibility will cause hazardous
driving conditions.

Precautionary/preparedness actions...

A dense fog advisory is issued when dense fog will substantially
reduce visibilities, to one-quarter mile or less, resulting in
hazardous driving conditions in many areas. Motorists are advised
to use caution and slow down, as objects on and near roadways
will be seen only at close range.



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