Patchy fog and dense fog are expected to develop across portions
of Deep South Texas and the Rio Grande Valley overnight and into
Tuesday morning. Visibility may be reduced to less than 2 miles
at times, with locally dense fog to one-quarter mile or less
late. A Dense Fog Advisory may be needed if dense fog becomes
widespread.

Use caution if traveling as visibility may change rapidly in a
short amount of time. Use low beam headlights and leave extra
distance between your vehicle and others on the road.