DAYTON — A Frost Advisory is in effect for Preble, Butler, Wayne, Union counties from 2-9 a.m. Thursday
A Freeze Watch is in effect for all counties from 1-9 am. Friday.
It’s about to get downright cold due to more effective radiational cooling. Hey it’s Stormcenter 7 Meteorologist Ryan Marando. The reason temperatures Wednesday and Tuesday morning have stayed out of the 30s for the most part is due to mixing winds and cloud cover.
Cloud cover acts like an atmospheric blanket, which keeps temperatures warmer overnight. That in combination with wind gusts helps keeps the atmosphere mixed and warmer overnight as well.
[DOWNLOAD: Free Storm Center 7 Weather app for alerts as news breaks]
Thursday, Friday, and some of Saturday morning will not have those two ingredients, and therefore, effective radiational cooling. What that means is during the nighttime hours, all the heat that we gained from the day is going to rapidly escape into space and the upper atmosphere, keeping things colder overnight.
[WATCH Storm Center 7 Weather on the following devices]
By Friday morning, widespread frost is expected with temperatures dropping into the mid-30s.