6/30 – The Chief’s “Another Day of EXTREME Heat” Friday Morning Forecast

Just like the past couple of days…high pressure is still centered off the coast, and doesn’t look to be going anywhere today. The area of high pressure will begin to weaken slightly on Saturday and start its slow progression east. Similar to Thursday afternoon, the threat of a shower and thunderstorm will be rather low but not zero. As expected, most locations verified the Excessive Heat Warning yesterday with Heat Index numbers at or above the 110 degree threshold, and actual highs in the mid-upper 90s. That doesn’t look to change today, as another EXCESSIVE HEAT WARNING is in effect from through this evening. Tomorrow slightly lower dew-points with forecast heat index values more appropriate for a Heat Advisory. The lower dew-points may allow for overnight lows to be a degree or two “cooler” Saturday night, not that we’ll notice the difference.

Sunday afternoon any thunderstorm that forms will most likely form along the sea-breeze front, and will form late in the day when temperatures hit the 90s, along with the possibility for a HEAT ADVISORY. As thunderstorm coverage increases each day next week, temperatures will begin to trend back to more normal levels.  High temperatures on Monday should climb into the low 90s…Tuesday we could see the upper 80s return with increased cloud coverage, rain potential and less suppression in the atmosphere.