Mariposa projected high temperature for Tuesday: 94 degrees
Oakhurst projected high temperature for Tuesday: 94 degrees
Yosemite Valley projected high temperature for Tuesday: 86 degrees
June 18, 2019 - The National Weather Service Hanford Office reports a recurrence of widespread triple digit heat is likely in the San Joaquin Valley this afternoon.
Prolonged exposure to triple digit heat can pose a health risk to the elderly, persons with respiratory ailments and anyone who is not yet acclimated to hot weather.
If you’re going to be outdoors during the hottest time of the day (between 1 pm and 6 pm), avoid strenuous exercise, stay hydrated and wear light colored, loose fitting clothing.
Remember that going from hot air temperatures into cold water in area rivers could cause shock to the body and lead to drowning.
Use caution if entering local waterways and remember to wear a life vest.
Area Forecast Discussion National Weather Service Hanford CA 322 AM PDT Tue Jun 18 2019 .SYNOPSIS...Isolated afternoon thunderstorms are possible over the Sierra Nevada today. Otherwise, a warming trend will occur the next couple of days with temperatures climbing to around 10 degrees above normal today and Wednesday. A cooling trend will then occur later in the week with temperatures falling below normal by Friday. && .DISCUSSION...The mid level debris clouds that were prevalent over our area during the evening have cleared out as high pressure continues to push inland into Norcal. The high is expected to build southward today into central CA which will result in a noticable warming and drying trend across our area with skies remaining mainly clear for the most part. Daytime temperatures today are expected to be 4-6 DEG F above yday which means a return of triple digit heat across the San Joaquin Valley. Scattered thunderstorms broke out yday afternoon across the Sierra Nevada range and a few brought heavy rainfall and gusty winds. Afternoon thunderstorms are once again possible over the higher elevations of the Southern Sierra Nevada, but coverage is expected to be less significant due to a drier airmass and less instability. The high remains in place on Wednesday with another day of triple digit heat anticipated for the San Joaquin Valley. Convective potential over the Sierra Nevada will continue to decrease as the airmass becomes stable. A strong PAC shortwave is progged to drop out of the Gulf of AK on Wednesday and into Oregon by Thursday. This feature is then progged to drop into the Great Basin Thursday night and Friday bringing a dry cold front through our area resulting in a period of increased winds during this period. Breezy to windy conditions will be possible across the Kern County mountains and Deserts Thursday afternoon and evening. This system will also bring a cooling trend to our area on Thursday and Friday with temperatures lowering to below seasonal normals by Friday as a cooler airmass settles in behind the front. Dry onshore flow will keep skies mainly clear during this period. Northerly flow in between the departing system over the Great Basin and an offshore ridge will keep our area dry with near normal temperatures over the weekend. Medium range models in good agreement with brining a large upper low into the PAC NW early next week which would result in a period of below normal temperatures across our area for much of next week. Deep moisture and dynamics are expected to remain to the north of our area at this time so precipitation is not anticipated for our area next week.Source: NWS
