6-5-14...HOT TEMPERATURES, LOW HUMIDITY AND SOME BREEZY WINDS PEAKING OVER WEEKEND... ...ISOLATED THUNDERSTORMS POSSIBLE OVER THE SIERRA IN THE AFTERNOONS AND EVENINGS... * IMPACTS: ELEVATED HEAT CONCERNS ESPECIALLY FOR SENSITIVE GROUPS. POTENTIAL FOR LARGER FIRE GROWTH AND RAPID FIRE SPREAD. * CONFIDENCE: HIGH FOR ABOVE NORMAL TEMPERATURES, LOW AFTERNOON RH AND AREAS OF POOR RH RECOVERY. MODERATE FOR WIND SPEEDS AND THUNDERSTORMS. * TIMING AND STRENGTH: LOWERING RELATIVE HUMIDITY THROUGH THE WEEK WITH THE WORST CONDITIONS DURING THE WEEKEND. WARMEST TEMPERATURES IN MOST LOCATIONS EXPECTED ON SUNDAY. DRYING, NORTHERLY WINDS (5-15 MPH WITH GUSTS TO 30 MPH) EXPECTED THROUGH THE WEEKEND WITH THE STRONGEST AND MORE WIDESPREAD NORTHERLY BREEZY WINDS ON SUNDAY. * TEMPERATURES: HIGHS 100 TO 108 IN THE VALLEY AND LOW 70S TO LOW 90S IN THE MOUNTAINS. MAX TEMPERATURES 15 TO 20 DEGREES ABOVE NORMAL TEMPERATURES FOR THIS TIME OF YEAR. OVERNIGHT LOWS IN THE 60S TO AROUND 70 IN THE VALLEY AND 70S IN THE FOOTHILLS THERMAL BELT. NEAR RECORD TEMPERATURES POSSIBLE. * THUNDERSTORMS: ISOLATED THUNDERSTORMS POSSIBLE OVER THE SIERRA THIS AFTERNOON AND EVENING AND AGAIN FRIDAY AND INTO THE WEEKEND.