Monday was unseasonably warm in Southern California with widespread temperatures in the Los Angeles and San Diego areas in the 90s. But a storm forming in the Gulf of Alaska brings about huge changes by late week.
As the storm drops south it becomes noticeably cooler Wednesday and Thursday and colder Friday. By Friday high temperatures will be as much as 30 degrees lower than Monday.
Along with the change to colder temperatures there is also likely to be a little rain and mountain snow. Precipitation amounts will be light but will just add to the stark change to the weather early in the week. Snow levels by Friday drop to near 5,000 feet. No widespread travel problems are expected however because of the light nature to the snowfall.
Following a dip in temperature during the middle of the week, summerlike warmth will rebound across much of the Northeast by this weekend.
Daily episodes of severe thunderstorms and flooding downpours will impact the Plains this week, possibly lingering into the weekend.
Wind, seas and surf will build in advance of what could eventually become the first tropical system of 2015 along the southeastern Atlantic coast of the United States late this week.
The map will depict the threat levels for the four main storm hazards: wind, storm surge, flooding rain and tornadoes.
A tropical system could form near the Southeast coast of the United States later this week, which is several weeks ahead of the official start of the Atlantic hurricane season.
Chesnee, SC (1989)
A 700-yard-wide tornado lifts a 1,000 pound bale of hay and carries it for five miles. Two people killed by the storm.
Fallon, NV (1995)
1.92" of rain (4th-5th)... about 40% of their normal annual rainfall.
Lowell, MA (1761)
Five inches of snow. "A very stormy day of snow, an awful sight, the trees green and the ground white. The sixth day the trees in a blow and fields covered with snow", Town Clerk of Ashford, Ebenser Byles.