Weather History & Current Conditions Historical note: In 1950, Des Moines saw a 14° temperature spike in 5 minutes during a thunderstorm, reaching 87° due to prefrontal warming Current forecast: Cold front Friday with showers/thunderstorms, then cooler temps - returning to seasonal averages (mid-60s highs, upper-40s lows) Frost Watch Only 5 Iowa stations have hit freezing so far (Elkader, Sioux Center at 31°, Stanley, Spencer and Mason City at 32°) No widespread frost or freeze expected through end of October Growers advised to protect tender crops like basil during low-40s temperatures Precipitation & Long-Range Outlook Southwestern Iowa received 3 inches of rain (nearly a month's worth) Winter outlook shows classic La Niña pattern: leaning cold in northwest Iowa, wet in eastern Iowa for December-February Warmth persisting through end of October with near-normal precipitation Specialty Crop Updates Root crop harvest underway Spinach showing Cladosporium (fungal disease) in high tunnels—venting recommended Resources shared: eGRO water testing guide, corn earworm management in cut flowers Upcoming Events Albert Lea Seed cover crop show next Friday in Ames High tunnel short course November 12th at Iowa Arboretum featuring Becca Rudebusch, Dan Sheild, Brian Krug, and Natalie Hoidal summary generted using claude.ai

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