We have had mild weather for several weeks now.  The 1/4 ac Camarosa and 1/4 ac Chandler that were covered from early Jan to late Feb have started blooming, especially the Cams.  I'd say 20% of the Cams have one or more blooms open already.  This afternoon dad, Lara and I covered the entire field with the 1.0  oz row covers in 20-30 mph wind gusts.  We have had a hard time keeping the covers down; I added more rock bags around the edges...probably one every 6-8 feet.  NWS predicts 21 tonight and high winds.  The 1.0 oz covers may not cut it tonight.  I checked two blossoms with thermocouples after dark with ambient temperature already below freezing.  Looks like they are about 6 degrees warmer than ambient.   My digital thermometer loses accuracy when the instrument drops to around freezing.  It reads about 1.5-2.0 degrees warmer.  At room temperature it is dead on measuring an ice bath.  I'll check tomorrow at 6 am.