NWISA Singlehanded Championship - Full

# SchoolSailor TOT
1 Gig Harbor High School Gig Harbor High School Axel Stordahl '20 28
2 Bainbridge High School Bainbridge High School Zach Cooper '20 42
3 Mercer Island High School Mercer Island High School Cooper Hand '20 46
4 Decatur High School Decatur High School Corbin Torralba '22 61
5 Northwest Academy Northwest Academy Kieran Banyard '23 87
SchoolSailor R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 TOT
Gig Harbor High School Gig Harbor High School Axel Stordahl '20 1 1 1 1 2 2 2 3 2 2 1 1 1 2 3 2 1 28
Bainbridge High School Bainbridge High School Zach Cooper '20 2 2 2 2 1 1 1 4 3 1 4 2 3 3 2 3 RAF 42
Mercer Island High School Mercer Island High School Cooper Hand '20 3 4 5 4 3 4 3 1 1 4 2 4 2 1 1 1 3 46
Decatur High School Decatur High School Corbin Torralba '22 4 3 3 3 4 3 4 5 5 3 3 3 4 4 4 4 2 61
Northwest Academy Northwest Academy Kieran Banyard '23 5 5 4 5 5 5 5 2 4 5 DNS DNS DNS DNS DNS DNS DNS 87

Performance rating asks, for each skipper: holding every other boat fixed, which rating makes my actual race-by-race finishes least surprising? Boats are valued with the singlehanded rating rather than the fleet rating: 0.79 × the skipper's fleet rating from the week before the event (unrated skippers start at 1.11); the skipper's own singlehanded offset. Strength differences are scaled by 0.80 before they become probabilities, the value that calibrates the model on seasons it had not seen. Non-finishes (OCS, DNF and similar) are left out of the fitting, as in the rating model.

Percentile places a rating among the 495 ISSA sailors with a singlehanded rating who raced the discipline in the last three seasons. Surprise is how many bits more surprising the finishes were at the pre-event rating than at the performance rating. P(this good or better) simulates the event 3,000 times at the pre-event ratings, with the same regatta-form model as the fleet analysis pages, and reports how often the skipper would score this many points or fewer in the races they sailed.

The singlehanded offsets are the current ones (the discipline files keep no weekly history), so a skipper's own offset has already seen this event; offsets are shrunk hard, so the effect is a few hundredths at most. Only skippers are rated.

  • u no fleet rating — the model's level for unrated skippers is the baseline.

Division A  5 boats · 17 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Axel Stordahl '20Gig Harbor High School17/171.972.74+0.7783rd → 95th1.814%1.6 / 2.3
2Zach Cooper '20Bainbridge High School17/171.271.77+0.4966th → 79th0.832%2.5 / 2.8
3Cooper Hand '20Mercer Island High School17/171.03u0.96−0.0759th → 57th0.037%2.7 / 3.0
4Corbin Torralba '22Decatur High School17/170.330.29−0.0531st → 30th0.057%3.6 / 3.5
5Kieran Banyard '23Northwest Academy17/170.45-1.33−1.7835th → 2nd5.5>99%5.1 / 3.4

Conditions — 10/05/2019 (8am–6pm)

☁️Overcast
Humidity 79%  ·  Pressure 1028.4 hPa

Temperature

56°F
↑ 60°F   ↓ 51°F
Feels like 54°F

Wind

● from   ▲ toward
3.3 kn
avg  ·  max 5.0 kn
Gusts to 10.9 kn
From SSW (201°)

Sky & Precipitation

Cloud cover75% Sunshine6.2 hrs Humidity79% Pressure1028.4 hPa Rain0.01 in

What this breeze does at CYC Seattle — from fleet racing

Breeze: S about 6 kn (weather reanalysis in the scorer’s units)
In fleet races at CYC Seattle in this breeze: a typical day (−0.02)
Nothing in this breeze favours either side in fleet racing here: results follow the ratings about as usual.

Orderliness is how tightly a fleet race’s finishing order follows the pre-regatta ratings, relative to a typical event (0): positive is the favourites’ day, negative the underdogs’. A value of ±0.02 means a rating gap counts about 2% less than on a typical day. This event is not a fleet race the rating model scores, so there is no actual value for it: this is what this venue’s fleet racing history says about the breeze on the day, read off the chart at the star. How this is estimated · compare venues.

Orderliness beyond the fleet at CYC Seattle by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (no labelled days at CYC Seattle: the all-venue pattern is shown).

From the notes

Short write-ups of what the ratings and results show, with the numbers and how they were computed.

All notes →