Historical Weather (This Day in History - 1993) Severe thunderstorms moved from Nebraska to western Iowa at 60 mph Wind gusts exceeded 70 mph, with 75 mph winds in Pottawattamie County destroying barns Council Bluffs received 2 inches of rain in 30 minutes causing urban flooding Des Moines recorded 83 mph wind gust 1993 was record wet year for Ames (20 inches of rain in July alone vs. 8 inches in July 2025) Current Weather Forecast Short-term (Justin Glisan) Rainfall chances continue through Friday night Cold front broke heat dome, bringing dew points down Temperatures: mid-80s through weekend, then back to 90s Minor rainfall chances early next week Northern Iowa has less rain chance as storm track moves south Expected rainfall: 3/4 inch statewide (below normal), 1.5-2 inches in southwestern Iowa Extended Outlook (Madelynn Wuestenberg) 6-10 day outlook (July 29-Aug 2): Slightly below normal temperatures in north, near normal in south; 33-40% chance above normal precipitation 8-14 day outlook (July 31-Aug 6): Continued slight chances of below normal temperatures; western Iowa slightly wetter, eastern Iowa near normal Normal temperatures: Daily highs mid-80s, lows in 60s Recent Weather Events Heat and Humidity Yesterday and prior day were hot, with cloud cover mitigating worst conditions in central Iowa Eastern Iowa experienced "dew point pooling" with dew points in upper 70s-low 80s Hottest reading: Dubuque Lock and Dam hit 95°F with heat index of 110°F Severe Weather 6 AM tornado warnings in central Iowa Tornado warnings near Maxwell and eastern Iowa Caused by remnants of mesoscale convective vortex from Kansas moving along warm boundary Rainfall Totals (Past 7 Days) Northeast Iowa: 4-4.5 inches (highest) Central Iowa: 3-3.5 inches Southwest Iowa: Trace to 0.25 inches (lowest, drought conditions persist) Specialty Crop Impacts Garlic Disease Investigation Farm in Chariton, Iowa had garlic crop with yellowing (suspected aster yellows) Testing revealed it was a virus, not aster yellows phytoplasma Cannot save seed for next year due to virus Comparison with aunt's clean stock showed dramatic difference At a different farm, possible Embellisia skin blotch observed on garlic wrappers Brassica Issues Black rot & alternaria affecting collards, broccoli, and kale Wet conditions exacerbating disease problems Nutritional Concerns Nitrogen leaching due to excessive moisture Fertilization may be necessary to supplement leached nutrients Crop Performance Issues Onions in Central Minnesota: Unexpectedly bolting across all varieties (planted from seed this spring) Zucchini: Poor fruit set, currently "worst crop of the year" candidate Tomatoes: Slow growth, fruit remaining green General pollination: Poor across multiple crops due to hot, wet conditions Heat may be affecting fruit set in tomatoes and peppers (flower abortion) Upcoming Events July 30: Cut flower field walk at River Root Farm (Decorah) July 31-Aug 1: Plant Peddler educator field day and variety day (Cresco) August 2: Grow Johnson County field day and food safety workshop August 5: Iowa State fruit and vegetable Field Day August 20: Midwest mechanical weed control field day Show Notes Hiatus announcement: No new episodes for 3 weeks (pre-recorded content only) Return date: August 21st, 2025 summary generated using Claude.ai

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