possible threat of thunderstorms for Northstate mountains and foothills

This Special Weather Statement is from the National Weather Service office in Sacramento: THREAT OF THUNDERSTORMS BEGINNING SUNDAY AND LASTING WELL INTO NEXT WEEK... *IMPACTS: POSSIBLE FIRE STARTS FOOTHILLS AND MOUNTAINS. LOCAL DOWNPOURS AND POSSIBLE MINOR FLOODING...MAINLY HIGHER ELEVATIONS. *TIMING: ISOLATED STORMS OVER THE MOUNTAINS BEGINNING SUNDAY AFTERNOON. AREAL COVERAGE OF STORMS INCREASING THROUGH MIDWEEK. ISOLATED STORMS ALSO POSSIBLE IN THE VALLEY. *TEMPERATURES: TRIPLE DIGITS IN THE VALLEY SUNDAY AND MONDAY... COOLING BY MID WEEK. *LOW PRESSURE OFF THE COAST IS FORECAST TO BRING A THREAT OF THUNDERSTORMS ACROSS INTERIOR NORTHERN CALIFORNIA AS EARLY AS SUNDAY AND THROUGH THE WEEK. CONFIDENCE IS NOT HIGH IN THE TIMING AND MOVEMENT OF THE LOW PRESSURE SYSTEM AFFECTING THE AREA.