While the high temperatures will fall off a bit over the next couple of days, they will still remain in mid-summer form without any rain in sight. Smoke from the western fires will still drift into the region in varying amounts creating hazy conditions likely through the weekend. Highs will range from the mid-90s through the weekend before dropping into the 80s by the early to middle part of next week.

urban heat island

Yesterday, I mentioned overnight lows here in Reno have risen greatly in the last few decades. The reason is almost entirely due to urban heat island effect… especially in the area around the Reno airport, which is where the official temperatures are recorded. Back in 1970 until the late 80s the airport was surrounded by irrigated alfalfa fields. This natural swamp cooler makes a tremendous difference… especially in the night time period. Now the airport is almost entirely surrounded by concrete and asphalt. As I mentioned, the amount of warming that it can make can be pretty drastic. Just look at differences in places like the airport (the official Reno location) and outlying areas like Spanish Springs or Washoe Valley. All of them are pretty close in elevation and general geography, but the airport can be 10-15 degrees warmer on a clear and calm night, thanks to the heat island.

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