Frost Advisory For Saturday Morning

From the National Weather Service: a Frost Advisory is in effect for Sioux Falls and areas to the east.

...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM CDT SATURDAY...

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 3 AM TO 9 AM CDT SATURDAY.

* WEATHER CONDITIONS...TEMPERATURES WILL BE IN THE LOWER TO MID
  30S AFTER MIDNIGHT TONIGHT AND LAST INTO VERY EARLY SATURDAY
  MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED