Extreme Temperature Diary- July 7, 2018/ Hot Topic: Historic U.S. Heat Wave Day Ten

Saturday July 7th… Dear Diary. The main purpose of this ongoing post will be to track United States extreme or record temperatures related to climate change. Any reports I see of ETs will be listed below the main topic of the day. I’ll refer to extreme or record temperatures as ETs (not extraterrestrials)😊. Here is today’s main climate change post related hot topic:

Historic U.S. Heatwave Day Ten

I have some very good news. Today should be the last day of a historic heat wave that has popped up from coast to coast from late June through early July. Also, while producing more records in the Southwest, today won’t be nearly as torrid in Southern California where all-time records were set yesterday. The combination of a bit more marine and monsoon moisture, and weakening of the heat dome should end extreme heat in Southern California, but it will remain dangerously hot due to higher heat index vakues. By Sunday we will see maximum temperatures that were very typical of a July day from the 1970s, the decade before global warming hit its stride:

This is not to write that the danger of seeing another heat wave are over. Far from it given that 500 millibar heights will remain high across the CONUS and that heat dome will strengthen again the next few days:

And now to the bad news. All-time record heat in Southern California aided conflagrations to explode last night. What is termed the Holiday Fire appears to be among the worst:

It appears after what we have seen since 2010 that, outside of the Gulf Coast and Florida due to hurricanes, California is the most susceptible U.S. state for the ravages of climate change.
Today I will concentrate on reports coming from the Los Angeles area, which is still being hit hard:

Setting new highs for the date (‘daily’) is not exceptional, but beating the old one by 10°C (18F, Van Nuys) is.

: Gov. Jerry Brown declares state of emergency in Santa Barbara County due to

 Meteorologically this statistic off the Southern California coast was astounding:

As expected more records did fall today across Southern California, but a moderating “cooling” trend, if you can call it that, has set in:

Our record highs for today are all daily records – no all time highs. But increased humidity made it feel hotter in many places.

Amidst the thunderstorms, we also broke some daily records today! Check out the list:

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The Climate Guy

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