Mariposa projected high temperature for Sunday: 85 degrees and Monday: 85 degrees
Oakhurst projected high temperature for Sunday: 88 degrees and Monday: 88 degrees
Yosemite Valley projected high temperature for Sunday: 83 degrees and Monday: 83 degrees
August 18, 2019 - The National Weather Service Hanford Office reports high temperatures this afternoon and Monday afternoon throughout Central California will be a few degrees below normal for this time of year.
Gradual warming is expected Tuesday and Wednesday. Widespread triple digit heat will likely return to the San Joaquin Valley Thursday.
Area Forecast Discussion National Weather Service Hanford CA 323 AM PDT Sun Aug 18 2019 .SYNOPSIS...Dry weather can be expected over the central California interior for the next several days. Temperatures will average slightly cooler than normal through Monday. A warming trend can be expected for the remainder of the week with temperatures ending up several degrees above normal by Thursday. && .DISCUSSION...A cooler and refreshing change in the weather is in store for us during the next couple of days thanks to an onshore flow. A deep marine layer exists along the central California coast this morning. Time lapse satellite imagery shows ocean stratus moving into coastal valleys and extending as far inland as the foot of Pacheco Pass. Brisk winds are still blowing through the Sacramento delta as of this writing and will likely continue through at least this evening while we remain under a dry southwesterly flow aloft. The best part of our current weather pattern is that the onshore flow will bring ocean cooled air into the entire San Joaquin Valley and lower foothills for at least another 36 hours. Some of this modified marine air will even spill below the Kern county mountain passes into the Mojave desert where high temperatures will remain below the century mark. San Joaquin Valley residents will benefit most from this onshore flow today and Monday with highs ranging from the mid 80s in Merced County to the lower 90s elsewhere and overnight lows in the mid 50s to mid 60s. Winds will be locally gusty through and below the passes on the west side of the San Joaquin Valley and in Kern county through this evening but will generally remain below advisory levels. Our respite from hot weather won`t last very long, however. The upper level ridge of high pressure that baked us last week will gradually build back over the Golden State during the mid to later part of the week. The ridge will be centered over Texas during the next 2-3 days but its retrogression will bring widespread triple digit heat back into the Kern county desert Wednesday and in the San Joaquin Valley and lower foothills beginning Thursday. Friday through next Sunday could be equally as hot as last week as the ridge strengthens over central California. Otherwise, our weather will remain dry for at least the next 7 days. In the meantime, the tropical Eastern Pacific will likely become more active next week after a relatively dormant period. The models forecast the development of a rather strong tropical cyclone off the central Mexican coast which could threaten the southern Baja peninsula by the end of the week. High pressure ridges generally strengthen to the north of these systems, so that boosts our confidence of strong upper level ridging over central and southern California in the 5 to 7 day period.
Source: NWS
