The warm Bay area weather enjoyed this weekend is gone.
"Parts of the Bay area will see the coldest air in four years," Bay News 9 meteorologist Josh Linker said.
A cold front has arrived and temperatures will plummet overnight to the 30s in the Bay area and 20s in the northern counties. We can expect freezing conditions in the Bay area overnight.
"Lows will be in the 20s and 30s, with wind chills in the teens and 20s," Linker said. "Highs on Tuesday, even with some sunshine, will stay in the mid-upper 40s."
A freeze warning has been issued for Hillsborough, Manatee, Pasco and Polk counties for tonight, with low temperatures in the upper 20s to low 30s expected.
A hard freeze warning will be in effect for Citrus and Hernando counties, with lows in the mid to upper 20s forecast. Both warnings run from tonight until 9 a.m. tomorrow.
Tuesday's high will only reach around 47 degrees, according to the Bay News 9 weather experts, and another freeze warning will be in effect for the region until Wednesday morning.
The cold air is part of what some meteorologists are calling a "polar vortex," a counterclockwise rotating pool of cold, dense air that's expected to bring record cold to the Midwest and frigid conditions to even the deep South.
The arctic plunge won't last long locally. Wednesday will warm up to the mid 60s, and Thursday and Friday will be in the mid 70s.