How Corn Sweat Fuels Midwestern Spercells - August 21,2026

• 00:00 — Opening: Midwestern agriculture, evapotranspiration, and severe weather
• 01:00 — National severe-weather outlook and the Thursday/Friday threat landscape
• 02:00 — Regional hazards: Pennsylvania, the Carolinas, and the Dakotas
• 03:00 — The 2% tornado risk explained
• 03:50 — Short-wave troughs, hail, and severe-weather mechanics
• 04:50 — Medium-range outlook: “Predictability too low”
• 05:50 — Ensemble uncertainty and the difference between “predictability too low” and “potential too low”
• 06:50 — Southwest heat dome and upper-level ridge
• 07:50 — Dangerous overnight heat and cumulative physiological stress
• 08:50 — Moisture advection, greenhouse effects, and reduced nighttime cooling
• 09:50 — Convective inhibition and the suppressed monsoon
• 10:50 — Inverted-V soundings and virga
• 11:50 — Microbursts and dry thunderstorm wind
• 12:50 — Aviation hazards from microbursts and wind shear
• 13:50 — Rossby waves connecting the Southwest ridge to the Midwest trough
• 14:50 — Midwest northwest-flow severe weather
• 15:50 — Steam fog near St. Louis
• 16:50 — Evapotranspiration and “corn sweat”
• 17:50 — Agricultural moisture and elevated dew points
• 18:50 — CAPE, cold-front lift, and parcel acceleration
• 19:50 — Deep-layer shear and storm organization
• 20:50 — Hodographs and storm splitting
• 21:50 — Northwest-flow supercells and southeastward storm tracks
• 22:50 — Cold-front passage and cooler, drier weekend air
• 23:50 — Great Lakes marine hazards
• 24:50 — Cold air moving over warm lake water
• 25:50 — Marine-layer lapse rates and turbulent mixing
• 26:50 — Fetch and wave growth
• 27:50 — Lake Michigan’s north–south fetch and southern-shore rip-current risk
• 28:50 — One cold front producing multiple regional hazards
• 29:50 — Full thermodynamic chain recap
• 30:50 — Agriculture’s possible influence on future severe-weather climatology
• 31:50 — Poleward agricultural shifts and changes in evapotranspiration
• 32:50 — Human land use and atmospheric feedback
• 33:50 — Connecting biology, hydrology, and planetary dynamics
• 34:50 — Final synthesis: localized hazards from one interconnected system
• 35:50 — Closing remarks
• 36:26 — End

The time stamps are approximate 

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