Today is a good day to remind folk that the Midwestern Regional Climate Center has a number of freeze map products available at their VIP site (Vegetation Impact Program).  The site has national maps for a number of different parameters like median date of last spring frost (you choose 32 F or 28 F).  Check it out at  After this morning, our next batch of colder than normal air is likely to come in early to mid-March.  Will it get down to freezing then?  In some areas I think it will, although the farther south you are, the less of a threat it will be.