Building a Weather Decision Engine

A deep dive into the design, architecture, and edge cases behind the Groundwise engine — the shared decision layer that powers Ridewise, Fieldwise, and Yardwise.

4 articles in this series

I Built a Weather Engine That Tells You When to Ride, Play, or Water

March 12, 2026 · by Michael Morrison

Article 1 of 4 in Building a Weather Decision Engine

One decision engine, three audiences: a yes/maybe/no verdict for riders, rec league players, and gardeners.

Turning Raw Weather Into a Drying Model

March 17, 2026 · by Michael Morrison

Article 2 of 4 in Building a Weather Decision Engine

How we model surface drying after rain, and why a downpour and a drizzle leave very different trails.

One Engine, Three Apps: Sharing a Swift Decision Engine Across Products

March 20, 2026 · by Michael Morrison

Article 3 of 4 in Building a Weather Decision Engine

Structuring a shared Swift package across three apps with different surfaces, thresholds, and verdicts.

Edge Cases That Break Your Weather Model

March 23, 2026 · by Michael Morrison

Article 4 of 4 in Building a Weather Decision Engine

Freeze-thaw, snow melt, rain intensity, plant dormancy — the real-world complexity simple weather models miss.