Expect rain and snow Tuesday -- at least in the high Sierra.
The National Weather Service has issued an alert for isolated thunderstorms in the northern part of the central San Joaquin Valley and for the rest of the region Wednesday afternoon and evening.
Some of the storms will bring hail, lightning, gusty winds and heavy downpours, the weather service said.
In the Sierra, snow levels are expected to fall to 7,000 feet Tuesday, and some secondary roads may be covered. Snow showers should linger through Wednesday, the weather service said.
The weather is due to a low-pressure system moving in from the Pacific.
Today's high in Fresno will cool down to 73 degrees -- well below the record-tying mark of 102 degrees last Thursday. There is a 20% chance of showers and thunderstorms after 11 a.m.
That rain chance continues through Wednesday, but the daytime high will rise to near 80.
Then the storm system starts heading east on Thursday, and conditions will turn sunny and warmer, the weather service said.
By Friday, the high in Fresno should be in the mid-90s. Temperatures will remain there through Memorial Day, the NWS said.
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