The National Weather Service issued an excessive heat warning for much of California beginning Friday at noon and extending into Monday night. Forecasters are predicting dangerous triple-digit highs and warm overnight lows for much of the state’s inland regions.
It's moderate along the coast, on the west side of California, and in the mountains to the east. It's *cold* at night in both places. The flat central valley gets hot. It has been radically altered by human activity in the past couple of hundred years, so comparing temperature records is tricky.
There are better sources of weather data. Most of the US services get their current weather information from NCDC/NOAA:
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I could build a weather web site with the tools they provide.
Once the various services have the current data, they can get forecasts from ECMWF, GFS, NAM, ICON, HRRR, etc. Once they have the numbers, they produce a weather guess and presentation web site:
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However, the forecast accuracy vary with location and algorithm:
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Incidentally, the Baker CA 134ft thermometer is currently cooking at
116F (87C).
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If computers, sensors, algorithms, and models all fail, there's always The Old Farmer's Almanac:
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Well, maybe not. The California prediction for July 7-19, 2021 is "Isolated showers, cool".
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