For NorthWestern SD...my place...
TEMPERATURES WILL DROP TO 10 BELOW TO 20 BELOW ZERO LATE TONIGHT.
THE FRIGID TEMPERATURES... COMBINED WITH 5 TO 10 MPH WINDS...
WILL PRODUCE WIND CHILL VALUES OF 20 BELOW TO 30 BELOW ZERO
LATE TONIGHT INTO EARLY TUESDAY MORNING.
Good thing it isn't too...