May 28, 2026
Cloud discourse is getting heated
Ten Basic Clouds
The internet takes a deep breath as cloud nerds turn a calm weather guide into a vibe
TLDR: A retired weather expert released a free, easy guide to the ten main cloud types, and people loved the break from nonstop AI chatter. The comments turned into a mix of sky nerd joy, regional cloud envy, and big questions about whether clouds can truly be predicted.
In a timeline usually clogged with artificial intelligence panic, productivity guilt, and political shouting, a humble free cloud guide somehow landed like a spa day for the internet. Retired U.S. weather expert John "Dr. Lightning" Jensenius shared a free PDF, Clouds Outside my Window, plus a template so anyone can make their own cloud book. The guide walks readers through the ten basic cloud types recognized by the World Meteorological Organization, basically the global rulebook for what’s floating above your head.
But the real weather event was in the comments, where people acted like they’d just discovered indoor plumbing for sky-watchers. One commenter practically sighed with relief: finally, something that isn’t about AI. That mood dominated the thread: less doomscrolling, more looking up. Another proudly entered the chat as a self-declared “cloud-enjoyer” and immediately dropped the International Cloud Atlas like a dealer handing out the good stuff, then ranked favorite clouds like a sports analyst doing power rankings.
There was also low-key cloud drama. One person asked the big question: can clouds be predicted from physics, turning a chill appreciation post into a mini philosophy-of-science moment. Another brought regional cloud jealousy, claiming Austin had the fluffy cumulus clouds they missed from the Midwest while the Bay Area served mostly blue sky and wispy cirrus. And then came the romantics, waxing poetic about halos, sunset colors, and rays stretching across the whole sky. For once, the hottest online take was simply: wow, nature is neat.
Key Points
- •John Jensenius created a free PDF cloud guide called *Clouds Outside my Window*, which also includes a link to a PowerPoint template for making a similar book.
- •The article credits Luke Howard’s observations of mixed cloud characteristics as an early basis for the ten basic cloud types.
- •The World Meteorological Organization’s *International Cloud Atlas* is presented as the official worldwide standard for cloud definitions.
- •High-level clouds covered in the article are cirrus, cirrocumulus, and cirrostratus, with descriptions of their appearance, composition, and optical effects.
- •Mid-level clouds covered are altocumulus, altostratus, and nimbostratus, with altocumulus described in detail as layered or patchy clouds that can produce a corona near the Sun or Moon.