Frost will threaten gardens in the Midwest and Northeast for the start of the week.
Chilly air that started off Mother's Day weekend will continue through Monday night bringing March-like frost and freezes to some locations.
Saturday night and early Mother's Day morning, temperatures dropped to around freezing in northern Michigan, allowing for some morning snow.
Temperatures on Sunday were held to more than 15 degrees below normal in the Great Lakes with a northerly breeze making the temperature feel even colder.
However, the breeze diminished by Sunday night allowing for areas of frost across the Midwest and into parts of the Northeast. This will be the case Monday night across much of New England and the mid-Atlantic as this cold air shifts eastward.
Late last week, Expert Senior Meteorologist Alex Sosnowski warned that "near-freezing temperatures will have some agricultural interests taking precautions to reduce the risk of damage to orchards, vineyards and berry farms."
Homeowners who have already planted their warm-season plants across these areas should take precautions to cover and protect them.
After the first few nights of the week, temperatures will rebound as a storm system moving across southern Canada brings warmer temperatures to the Great Lakes Tuesday and to the Northeast Wednesday.
A developing tropical storm, moving just north of the large islands of the Caribbean, will take aim at the Bahamas and southern Florida into this weekend.
Regions dealing with Zika-carrying mosquitoes could have another threat to monitor as tropical activity picks up this season.
Following a tropical storm threat in the Bahamas and Florida into this weekend, an uptick in tropical systems will continue for the next six to eight weeks.
On the heels of deadly Typhoon Mindulle, Japan is bracing for another threat from Typhoon Lionrock next week.
A deadly earthquake struck central Italy at 3:36 a.m. local time on Wednesday with tremors felt as far away as the capital city of Rome.
Following a taste of autumn chill to start the week, is summer heat and humidity over for the northeastern United States?
Lake Okeechobee, FL (1949)
Hurricane sends 155-mph winds against levees but the disaster of 1928, when the levees broke, was not repeated.
Kiana, AK (1976)
A weak tornado occurred, about 2.9 miles north of the Arctic Circle.
Elizabeth, PA (1979)
A heavy thunderstorm at Elizabeth, PA, 20 miles SE of Pittsburgh, tore the roof off an apartment building and downed about 100 trees. Trees were also knocked over at McKeesport, PA.