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overall 6.9/10 · Lake Chabot · Sat Oct 3, 5:30 PM

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Session timeline — light, pressure, events10091008sunsetlast lightprime 18:37 · Walking topwater (Spook/110) + Whopper Plop…6 PM7 PMsun altitude · barometer

SATURDAY OCT 3 — 5:30 PM SESSION

Lake Chabot, Castro Valley, Alameda County, CA | Last quarter (45%) | Moon in Cancer

One-paragraph version

Launch at 5:30 PM into a Sun hour; the window that matters is 6:37 PM–6:48 PM (sunset), parked on the walking topwater (spook/110). Overall 6.9/10 — solid conditions with one clear prime window; be there for it.

The locked numbers
Launch 5:30 PM / sunset 6:48 PM / dark ~7:14 PM
Moon Last quarter, 45% lit, sets 2:54 PM, rises 12:25 AM
Air 92°F at launch / window 76–85°F
Water ~70°F (air-temp lag — small-lake estimate, no gauge within 30 km; warming +2.4°F/wk)
Species presence on our lake list · not yet confirmed by a logged catch
Sky/wind 5% cloud, 6 mph wind, slowly falling barometer (1008 hPa)
Forecast low agreement — GFS/ECMWF/ICON ±4.6°F, ±2.3 mph, cloud uncertain (±63%)
Color Natural, translucent colors read true only in the top few feet — that's where color-matching forage pays off.
Solunar → Moon underfoot (major) ~7:37 PM; Moon overhead (major) ~7:05 AM; Moon overhead (major) ~8:03 AM
Scores weather 7/10 · solunar 9/10 · astro 4/10 → overall 6.9/10
Data sky + weather · GFS/ECMWF/ICON ±4.6°F, ±2.3 mph, cloud uncertain (±63%) (low agreement) · no lake-state inference · water temp estimated (no gauge nearby) · no stocking intel · logbook (none) · depth map: lake notes only

Weather layer

  • clear sky — fish tight to shade/structure
  • 4 mph chop breaks up overhead predators (plus)
  • barometer slowly falling (-2.9 hPa/6h)

Almanac layer (the old-timers' calendar)

  • Moon in Cancer — moon at home — feeding near cover, tides of appetite run strong (almanac tradition, honored as lore)
  • Off-quarter moon (neutral) — the almanac rates this a strong-feeding stretch
  • void-of-course until Moon enters the next sign at 15:54 — quiet hours, almanacs say fish pick at baits
  • Planetary hour at launch: Sun — visibility — fish the water you can see, stand tall on the bow (published in almanacs for centuries)

The session, hour-by-hour

Time Window Sky Do this
5:30 PM–5:49 PM Sun · Venus hour afternoon sun Hollow-body frog — walk it over matted grass, hold on 2 seconds on the strike
Chatterbait (bladed jig) — skim grass tops & wind lanes; snap-rip free of vegetation — half the bites come on the snap (shad)
5:49 PM–6:37 PM Venus · Moon underfoot (major) begins golden hour Walking topwater (Spook/110) — long casts over points/grass edges; walk-the-dog with hard 1–2s kills
Whopper Plopper / prop bait — steady wake over flats & grass tops; pause on the blow-up point
6:37 PM–6:48 PM Venus · major ON · Moon underfoot (major) begins · sunset + Mercury hour sunset Walking topwater (Spook/110) — long casts over points/grass edges; walk-the-dog with hard 1–2s kills
Whopper Plopper / prop bait — steady wake over flats & grass tops; pause on the blow-up point
6:48 PM–7:14 PM Mercury · major ON · sunset + Mercury hour · end of light (civil dusk) dusk Walking topwater (Spook/110) — long casts over points/grass edges; walk-the-dog with hard 1–2s kills
Whopper Plopper / prop bait — steady wake over flats & grass tops; pause on the blow-up point
7:14 PM–7:30 PM Mercury · major ON · end of light (civil dusk) dark Walking topwater (Spook/110) — long casts over points/grass edges; walk-the-dog with hard 1–2s kills (black — silhouette against the sky)
Whopper Plopper / prop bait — steady wake over flats & grass tops; pause on the blow-up point (loon/black)

Best presentations for these conditions

  • Walking topwater (Spook/110) — the big-fish-after-dark signature
  • Whopper Plopper / prop bait — calls fish from distance in low light
  • Hollow-body frog — vegetation only — worth it on this lake's grass mats
  • Chatterbait (bladed jig) — the wind-lane weapon

Line & knots for these rigs

  • Monofilament (nylon) — buoyant and stretches under load, which damps the surge on a hooked fish Knots quoted from the cited guides — facts, not folklore.
  • San Diego jam knot (line-to-terminal) — The San Diego jam knot is a common fishing knot used to tie a line to the hook, swivel, clip, or artificial fly. This knot is also known as the San Diego knot, reverse clinch knot or Heiliger knot. (Wikipedia — San Diego Jam knot)
  • Palomar knot (line-to-terminal) — The Palomar knot is a knot that is used for securing a fishing line to a fishing lure, hook, or swivel. It is strong and easy to tie and with practice can even be tied in the dark. (Wikipedia — Palomar knot)
  • Uni knot (line-to-terminal, line-to-line, reel-spool) — The uni knot is a multi-purpose fishing knot used in angling that can be used for attaching the fishing line to the spool of a reel, for joining main line to leader/backing lines, and for attaching lures, swivels and snaps. (Wikipedia — Uni knot) Practice: always wet knots before tightening, regardless of line material; fluoro under 10 lb: 10 wraps when tying the snell or uni.

Decision rules

  • Swirls/short strikes on topwater → don't speed up; slow down, longer pauses. Still missing → upsize the profile.
  • Wind from W at 6 mph → the E shore is wind-stacked (fetch ~346 m); fish it first — the SW shore is the lee.
  • Wind dies → skip the wind-lane baits, go straight to the low-light topwater. (shoreline wind model — © OpenStreetMap contributors, ODbL)

fishwitch mvp — weather via Open-Meteo · sky via Swiss Ephemeris · solunar + almanac tradition (fruitful/barren signs are old lore, honored but labeled).

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