Planning guidance, not a guarantee. Conditions can vary within a forecast area. Follow current official instructions and use local judgment for your route, equipment, health, and surroundings.
Start with the whole interval
A 90-minute plan can cross more than one forecast period. Check the start, the expected finish, and meaningful changes between them instead of relying on one point reading.
League rules, participant ages, surface condition, coaching, and venue procedures remain authoritative for the event.
Let official alerts lead
An official warning or urgent instruction takes precedence over a favorable-looking temperature, AQI, or rain forecast. Open the issuing authority’s guidance before changing a plan.
Compare genuinely different times
A better window should reduce a meaningful concern, not merely move the start by a few minutes inside the same source interval. Longer-range weather can help with orientation, but it is not a complete integrated recommendation.
Primary sources
These are the authoritative references behind this guide’s planning context.
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