A freeze warning has been issued for the state's metro areas and Plains for Friday overnight into Saturday morning including Colorado Springs, Denver, Fort Collins, and Pueblo. The specifics of the warning from NWS-Boulder: > ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 25 expected. * WHERE...Portions of north central and northeast Colorado including Denver, Boulder, Sterling, Julesburg, Akron. * WHEN...From midnight