The warm, late-summer fire weather pattern will continue over California this week.
Brush which has had all summer to dry out, combined with surging temperatures is increasing the risk of wildfires.
According to Western Weather Expert Ken Clark, "While winds will be relatively light and the humidity will hover in the moderate range during the night time and early morning hours, the dry brush and high temperatures during the day are enough to cause some problems."
In short, the temperature is high enough, the brush is dry enough and the humidity is low enough for the quick spread of any fire that gets going.
High temperatures are forecast to run slightly above normal through the week over California and much of the Southwest in general.
The cause of the San Gabriel Canyon fire, burning north of Los Angeles was still being investigated Monday.
Officials banned visitors in the region for safety concerns and firefighting efforts. Thousands of visitors typically visit the remote camping area during the holiday weekend.
The fire spread quickly up the sides of the canyon and rapidly grew to approximately 4,000 acres.
People are urged to be careful with outdoor power equipment, grills and campfires.
The weather pattern remains favorable for spotty afternoon and evening thunderstorm activity.
"The greatest chance of a drenching storm lies from Arizona to Colorado much of the week," Clark said, "However, there is a chance of tropical moisture enhancing thunderstorms over the mountains in California by Wednesday."
The circulation around John well to the south could pump moisture and spotty thunderstorms into the region during the second half of this week.
While far from the most dangerous weather conditions we have see, people still need to be careful with open flames and equipment outdoors this time of the year.
While a few of the storms over the Southwest can bring drenching downpours, many of the storms will bring little or no rainfall and the risk of lightning induced wildfires.
Overall, winds will remain light over Southern California this week, but large fires can generate their own wind, causing flames to race up the mountain sides.
Winds in general will be more active over northern California, especially later this week as an upper level disturbance approaches from over the Pacific Ocean.
The wildfire danger remains very high to extreme over large portions of Montana, Wyoming and the northern High Plains, according to the United States Forest Service.
So far this year California has seen 1,569 wildfires, 85 percent more than in an average year.
The Memorial Day weekend will begin cool, windy and rainy in New England and part of the mid-Atlantic.
GOES-East failed again late Tuesday. It is one of the main satellites meteorologists use for the eastern part of the United States and the tropical Atlantic.
The tornado tore through a path 17 miles long on Monday and had wind speeds as high as 200 mph.
On the two-year anniversary of the EF-5 tornado that leveled Joplin, Mo., the town has deployed assistance to Moore, Okla.
Severe weather has finally died down in the Northeast following more than 100 damage reports from Tennessee to New York.
Bahler, KS (2007)
8.25 inches of rain in 24 hours, from the 22nd to 23rd.
Over $150,000 damage in Monroe and Pike counties from a thunderstorm downburst (originally thought to be tornadoes).
Washington, DC (1925)