Overview
- Advisories from NWS offices covered dozens of counties overnight into Friday morning, including 27 in central Alabama and multiple in the north, with start–end windows ranging roughly from 1–8 a.m. to 3–9 a.m.
- Forecast lows in the mid-30s created conditions favorable for frost formation, which can occur even when air temperatures sit a few degrees above freezing under clear skies and light winds.
- Many locations reported temperatures in the 30s at daybreak, with the season’s first frost noted in several areas; readings included 37°F in Birmingham and 34°F in Fort Payne.
- Daytime temperatures are expected to rebound into the 60s Friday, but another round of early-morning frost is possible Saturday before a gradual warmup toward seasonal norms next week.
- NWS guidance urges covering or moving sensitive vegetation and taking care of pets, while similar frost advisories were posted in parts of Oklahoma, Arkansas, Missouri, Illinois, and Kansas.