The average morning low on March 6th is 40ºF in #HuntsvilleAL. This? This is the GEFS forecast temperature anomaly for midnight to 6 AM on the 6th. That purple? That's 15ºC (27ºF) below normal. 40-27 = 13ºF. Hope that's way overdone but fear it's not too far off. #valleywx

— Jason Simpson (@simpsonwhnt) February 27, 2019