Episode Summary

00:00:08 – 1907 Iowa weather history: record 92°F March heat, followed by volcanic eruption–driven spring cooling

00:01:31 – New March 2026 heat record: Little Sioux hits 97°F, breaking the all‑time Iowa March temperature record and surpassing previous 92°F marks from 1907 and 1986.

00:03:37 – This week's forecast: small rain chance Thursday, brief freeze Friday night, then temperatures rebounding into 70s–80s with a more active pattern and storm chances late next week.

00:04:48 – Mesoscale vs. synoptic systems: how models handle uncertainty, why forecasts "oscillate" several days out, and what that means for multiple‑day rain and severe weather threats.

00:07:03 – 7‑day QPF and early April outlooks: light northwest to heavier southeast Iowa rain gradients, plus warmer‑wetter Climate Prediction Center outlooks hinting at more thunderstorms.

00:08:56 – April patterns, wind, and frost risk: why April is Iowa's windiest month, how high‑amplitude ridges/troughs can still bring freezes amidst hot spells, and thoughts on planting timing vs. last frost dates.

00:12:57 – Recent extremes recap: details on the recent blizzard with 70 mph gusts, interstate closures, and the rapid flip to record March heat across Iowa and neighboring states.

00:14:29 – Severe Weather Awareness Week: overview of Storm Prediction Center convective outlook categories (marginal to high), the new "conditional intensity" layer, and how hatching now signals potential for violent tornadoes.

00:19:14 – Specialty crop planning: why growers may want to do spring tillage early ahead of a wetter, more active April while still being cautious about planting frost‑tender crops too soon.

00:20:16 – Recent crop impacts: damage to overwintered green onions in low tunnels, contrasting resilience of bulb onions and spinach, and low‑tunnel disease issues like sclerotinia in flowers after rapid warmups.

00:23:28 – Greenhouse tomato disease update: significant Tomato Spotted Wilt Virus losses in Red Deuce, and strong recommendations to switch to TSWV‑resistant tomato varieties despite good yield potential of Red Deuce.

00:24:26 – Mechanical weed control field days: University of Minnesota's free, on‑farm mechanical weeding workshops (starting May 27 at Featherstone Farm) featuring cultivating tractors, tools, hands‑on demos, and peer learning for vegetable growers.

Summary generated using perplexity.ai

Episode Summary

• [00:00:19] Welcome and introductions — Dan Fillius and Justin Glisan kick off the episode.

• [00:00:40] On this day in Iowa weather history — a powerful 1954 storm brought dirty snow, sleet, freezing rain, and widespread damage to telephone and power lines across Iowa.

• [00:01:19] Week ahead forecast — a winter storm system is expected this weekend with significant precipitation, especially in northeast Iowa, along with high winds and red flag warnings through Friday. Warmer and drier conditions are expected later in the month.

• [00:04:02] Recent weather notables — much of Iowa has seen 170–400% of normal precipitation so far this month, with temperatures running about 14 degrees above average statewide.

• [00:05:16] Severe weather recap — two severe weather events struck the region, including a tornado watch in central Iowa and a historic hail event near Kankakee, Illinois, where football-shaped hailstones measuring 6–8 inches were reported, potentially a new state record.

• [00:10:26] Iowa's first tornadoes of the season — two tornadoes reported in Lee County in far southeastern Iowa caused minor damage.

• [00:10:47] Specialty crop updates — Dan shares observations on overwintering crops including garlic, onions, kale, Salanova, and flowers, with notes on what survived the winter and what didn't.

• [00:15:53] Nitrogen mineralization — an overview of Iowa State Extension's FACTS tool, showing how much nitrogen is mineralized across Iowa's climate divisions, when it peaks, and what it means for early-season crop fertility planning.

• [00:19:23] Closing — no episode next week due to spring break; the show returns the last week of March.

episode summary generated using Claude.ai