The warm weather experienced over the weekend has turned to rain and the temperatures are expected to drop below freezing this week in some parts of the Valley, according to information from the National Weather Service at Phoenix Sky Harbor International Airport.
Motorists on Monday morning were greeted with sprinkles of rain throughout the East Valley coming across the state on a Pacific low-pressure system, but after the rain stops by the afternoon, a second low-pressure system from the northwest mixed with Arctic air will slide into the state and stay until the weekend, according to Keith Kincaid, meteorologist for the National Weather Service.
Less than five-hundreths of an inch of rain came down in most parts of the Valley, not causing any problems, but a freeze watch warning will be in effect Wednesday through Friday.
“The second low-pressure system will be significantly dryer and cooler,” Kincaid said. “It happens quite frequently, but the cold air doesn’t usually get that far south." The low temperature for Tuesday will be 37 with a high of 61, and on Wednesday the low will be 37 with a high of 49 – that’s nearly 20 degrees cooler than the average highs for this time of year.
On Thursday, the low temperature in the Valley is expected to be 33 with a high of 51, but Kincaid was quick to say that outlying parts of the Valley to the east or southeast could see temperatures drop into the high 20s.
Residents are advised to cover up plants and keep pets inside during that time. Anyone who has had trouble with water pipes also should cover them up or keep an eye on them, Kincaid said.
Warmer temperatures are expected by the weekend and should climb back up into the low 60s, which should be about normal for this time of year, Kincaid said.