Zion Traverse

Sunday is the trip's problem day and you need to plan around it hard. 87% precip chance with thunderstorm potential means you will likely be caught in weather on exposed Zion sandstone — which turns into a skating rink when wet. The Traverse has extended sections of slickrock and exposed ridgeline with essentially no shelter. If Sunday is a planned running day, either push Saturday's effort to cover maximum ground, or plan a lower-elevation canyon segment on Sunday where you have more tree cover and can bail to wash exits. Don't be on the Angels Landing connector or the high route above the canyon rim when that weather moves in.

Today's window is legitimately good. 62°F at the high, winds 3–12 mph SSW, partly sunny, 13% precip — clean conditions for moving fast. You've got 13.5 hours of daylight with sunset at 8:16 PM. If you're running the full Traverse (~48 miles), a noon start gives you 8 hours of usable light — that's a 6 mph average pace requirement to finish before dark, which is aggressive with elevation. More realistically, use today to bank the technical sections (Lee Pass to Kolob Canyons, or the Wildcat Canyon connector) while conditions are optimal, and plan camp accordingly. Temps tonight drop to 31°F with 89% precip — have your shelter sorted before dark and be buttoned up by sunset.

Monday looks like a reasonable redemption day if Sunday slows you down. 56°F, mostly sunny through the morning, with showers creeping in by afternoon. Get moving at first light (sunrise 6:45 AM) and target being off any exposed terrain by 1 PM. The afternoon shower window on Monday is softer than Sunday — 29% precip — so if you're on lower-canyon singletrack by midday you're probably fine.

Stream crossings are non-issues — the gauges referenced are out of region and the Zion-area flows are at normal spring levels. No fires within 50 miles. Snowpack data is also out of region and irrelevant here — Zion's canyon floor is clear. The one logistics note: tonight's low of 31°F means anything damp (shoes, layers) will freeze overnight. Dry your gear before temps drop.