This Afternoon: Showers and possibly a thunderstorm before 4pm, then scattered showers and thunderstorms after 4pm. Some of the storms could produce heavy rainfall. Temperature falling to around 55 by 5pm. South southeast wind around 17 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Tonight: Scattered rain and thunderstorms. Mostly cloudy, with a low around 46. Calm wind becoming east northeast around 6 mph. Chance of precipitation is 50%.
Wednesday: A chance of showers, then showers and possibly a thunderstorm after 10am. Some of the storms could produce heavy rainfall. High near 54. Breezy, with a southeast wind between 18 and 24 mph, with gusts as high as 33 mph. Chance of precipitation is 100%.
Wednesday Night: Rain and possibly a thunderstorm. Low around 48. South wind between 10 and 17 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Thursday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 52. South wind between 11 and 17 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Here’s a bulletin from the National Weather Service for Azusa, where a 700 acre wildfire continues to burn above Morris Dam:
AN UPPER LEVEL RIDGE OF HIGH PRESSURE OVER SOUTHERN NEW MEXICO WILL
WILL CONTINUE TO BUILD...AND SLIDE OVER SOUTHERN CALIFORNIA BY
FRIDAY. ALONG WITH WEAKENING ONSHORE FLOW...THIS WILL BRING A RETURN
TO HOT AND DRY CONDITIONS OVER MOST OF SOUTHWEST CALIFORNIA. THE
WARMEST TEMPERATURES ARE EXPECTED THURSDAY THROUGH SATURDAY...WHEN
WIDESPREAD TRIPLE DIGIT TEMPERATURES ARE EXPECTED OVER THE INTERIOR
AND VALLEY SECTIONS OF THE SOUTHLAND. TEMPERATURES UP TO AROUND 106
DEGREES ARE EXPECTED IN THE HOTTEST LOCATIONS. A FEW TEMPERATURE
RECORDS COULD BE BROKEN.
SINCE THE ONSHORE FLOW IS EXPECTED TO BE FAIRLY WEAK WITH THIS
HEAT EVENT...EVEN THE WARMEST INLAND PORTIONS OF THE COASTAL PLAIN
WILL LIKELY SOAR INTO THE 90S. THE BEST RELIEF WILL BE NEAR THE
IMMEDIATE COAST WHERE TEMPERATURES WILL REMAIN IN THE 70S AND 80S.
THE AIR MASS IS EXPECTED TO BE FAIRLY DRY THROUGH THIS WEEK.
ALTHOUGH THIS SHOULD HELP KEEP HEAT INDEX READINGS FROM REACHING
CRITICAL LEVELS...HUMIDITY READINGS WILL FALL INTO SINGLE DIGITS
OVER THE INTERIOR VALLEYS AND MOUNTAINS. THIS WILL BRING HEIGHTENED
FIRE WEATHER CONCERNS...ESPECIALLY TO THE MOUNTAIN AREAS WHERE
LITTLE TO NO OVERNIGHT RECOVERIES ARE EXPECTED. SOME SUB-TROPICAL
MOISTURE MAY RETURN TO SOUTHWEST CALIFORNIA THIS WEEKEND...WHICH
COULD HELP HUMIDITIES RECOVER ABOVE SINGLE DIGITS.
THE LONG DURATION HEAT EVENT COULD POSE HEALTH HAZARDS FOR ANYONE
OUTDOORS...ESPECIALLY FOR THE ELDERLY...SMALL CHILDREN...AND PETS.
IF YOU PLAN ON BEING OUTDOORS...REMEMBER TO REMAIN HYDRATED BY
DRINKING PLENTY OF WATER...WEAR LOOSE-FITTING CLOTHING AND A
HAT...AND REMAIN IN THE SHADE OR INDOORS AS MUCH AS POSSIBLE.
NEVER LEAVE CHILDREN OR PETS IN CARS WITH THE WINDOWS UP OR
CRACKED DURING THE DAY...EVEN FOR A VERY SHORT TIME...AS
TEMPERATURES CAN QUICKLY REACH LETHAL LEVELS.