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October 31, 2023
Remembering the Great Halloween Solar Storms
In late October 2003, the sun unleashed a massive solar storm that affected a variety of technological systems around the world.
October 26, 2023
U.S. Drought: Weekly Report for October 24, 2023
Moderate to exceptional drought covers 33.4% of the United States including Puerto Rico.
October 25, 2023
America’s Spooktacular October Climate
In observance of Halloween, we take a look at typical October climate conditions and Climate Normals for several spookily named places.
October 23, 2023
When to Expect the First Fall Freeze
Halloween is coming up and the fall season is fully underway. Fall brings cool, temperate weather that is anticipated after a hot summer. However, fall also means that winter is right around the corner. The first day of astronomical winter is December 21, and in some places, you’ll definitely need to break out the ice scraper for your car before then. Using data from the 1991–2020 U.S. Climate Normals , we have a good idea of when to expect the first freeze of fall. The first freeze can be described as when the surface air temperature is expected to be 32°F or below over a widespread area for a climatologically significant period of time. According to data, the first freeze in some high mountain and northern latitude locations can happen even earlier than August 31. A few of the coldest places can even experience freezing temperatures in any month! The “Historical Date of First Freeze: Median Date” map depicts the average date of each area's first fall freeze and is often used for things like agriculture. A simple way to think of it, is a freeze is expected to have happened on or before the listed date in five out
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