Cape Cod hub · Jeffreys Ledge → Hudson Canyon → Munson Canyon. Bluefin first, then canyon pelagics, then stripers.
Reports seeded Jun 23, 2026 · pins fade as they age — ask Claude to refresh the scan to repopulate.
Layers & data
Area report
Draw a box over the grounds you want analyzed, then paste the copied request into a Claude chat to generate the oceanographic report.
Saves the map position + which layers are on in the link — bookmark it or send it to the crew.
Sea Surface Temperature
—
Layer opacity
—
52°66°80°
min 52°
max 80°
°F scale — squeeze it tight around the break (say 60–72°) to make the edge pop. One scale drives all three SST layers — GOES-19, Blended MUR, and High-res.
Now the default SST layer. The sharp single-pass detail the blended layers smooth away — the actual temperature breaks & fingers the canyon fleet keys on. NOAA ACSPO super-collated (AVHRR + VIIRS), near-real-time daily, with thermal fronts. The °F sliders above drive its color scale. Cloud gaps show through — step to MUR for gap-free. Shares the Layer-opacity slider.
Weather
—
0153045+ kt
Colored field = wind speed (knots); black arrows fly downwind. Covers the US East Coast out to Bermuda — zoom out for the whole field, in for denser arrows. Slide to scrub 3 days.
—
0361015+ ft
Colored field = wave height (ft); black arrows run downswell. Works out in the canyons. Slide to scrub 3 days.
—
0½125+ nm
Wash = visibility (nm): magenta/red where it’s socked in, fading out as it clears — so the wash only appears where fog actually is. Pulls NOAA HRRR (3 km, hourly) over the shelf & canyons, GFS beyond — the model the official marine fog forecast leans on. Slide to watch fog roll in over 3 days. Atmospheric field, so genuine land fog can show too.
Radar opacity 70%
NWS base reflectivity (Iowa State Mesonet), refreshes ~5 min. Green→yellow→red = light→heavy. Land-based radar — coverage thins far offshore.
Vector field opacity 72%
Dims the wind / wave / current color wash (arrows stay solid) so SST or chart shows through. 0 = arrows only.
Flowing particles on the top active vector layer — currents, else wind, else waves.
Currents & tides
—
0123+ kt
Colored field = current speed (kt); black arrows point the way it flows (toward). Model surface current (Copernicus SMOC, ~8 km) clipped to open water — good for set/drift & broad eddy circulation, not fine inshore fronts. Opacity = Vector field slider (Weather).
Opacity 85%
NOAA’s Gulf of Maine forecast model (700 m ROMS): streaklets show set & drift over a speed shade, refreshed 4×/day. Covers the Gulf of Maine, the Cape, Georges Bank and the eastern canyons (Atlantis–Munson) at high res; thins out toward the western canyons. Shows the latest model cycle.
Opacity 65%
Combined storm-surge + tide water-level disturbance for the whole U.S. East Coast — fills the western canyons where GoMOFS thins out. Anomaly vs the model’s mean sea level, not MLLW.
lowmidhigh · ft MLLW
Water-level opacity 70%
—
Water level is interpolated from NOAA tide-station predictions — a regional wash showing the tide rolling through; local range & timing vary, so trust the station markers for exact hi/lo. Current arrows sit at NOAA current stations (the Canal, the Race, Woods Hole, Pollock Rip…), colored & sized by speed and pointing the way the tide sets — flood vs ebb (a dot = slack). Tidal flow is too channelized to honestly smear into a wash, so it’s shown as arrows, not a field. First load pulls a lot of predictions — give it a few seconds. Best inshore; out at the canyons tides barely move the needle.
Salinity
Temporarily unavailable. The free public satellite-salinity feeds that render as map tiles — NOAA's SMAP (last data Feb 2026) and SMOS (last data Dec 2025) — both stopped updating months ago, and the one current gap-free product (NASA OISSS) isn't served as tiles. Painting months-old salinity over the chart would mislead, so it's pulled. For the offshore water-mass boundary, the SST break already shows it. Ask in chat about the local OISSS option if you want current salinity badly enough to run a small prep step.
Chlorophyll
—
Live ocean color, 3 sensors stacked to fill gaps. Daily passes still leave cloud/orbit holes — step the day back for a cleaner look. Fish the clean blue side of the color edge.
Cloud-free daily color — gaps interpolated. Coarser (~9 km), slower service; shows the latest available day. Best for the big color pattern.
Chlorophyll opacity 80%
Satellite imagery
—
Image opacity 100%
The actual look of the water — color, sediment plumes, clarity, and where the clouds are. One satellite pass per day, so clouds/gaps are transparent; step the day back for a cleaner shot. Pair it with SST to confirm a break is real.
Map & markers
Relief opacity 70%
Hill-shaded seafloor terrain — canyon walls, ridges, banks & lumps in 3-D relief. Toggle SST off to read the bottom. Authoritative offshore/deep; sparse in shallow nearshore water. Public domain (GEBCO / Seabed 2030).
Chart opacity 85%
Official U.S. nautical chart (soundings, depth contours, buoys, lights, wrecks, restricted areas) — the public-domain NOAA ENC rendered in S-52 / ECDIS symbology, the bridge-display look (S-52 presentation library 3.4). Drop the opacity to read depths over the SST break. Not for navigation.
Density opacity
Rec (pleasure/sailing) + commercial-fishing AIS only — no cargo/tankers/tugs. Land-based coverage, fades ~40–50 mi offshore; the canyons are not covered. No data loaded — run build_ais_recfish.py and refresh.
Sun & moon
—
Computed for the center of the map (), in your local time. Major windows (moon overhead & underfoot) are the prime bite; minor windows (moonrise / moonset) are shorter. Pan the map or step the day to update.
Tools
Click points on the map to total a run (NM + bearing).
Loops the last 7 days of whichever SST / chlorophyll layer is on — watch which way the break is pushing.
Report species
Bluefin tuna
Yellowfin
Bigeye
Blue / white marlin
Striped bass
Mahi / other
Pin size + brightness = recency: big/bright = last 3 days, medium = this week, small/faded = older.
Data & the closed-group gap
SST: GOES-19 ABI L3C real-pass via NOAA CoastWatch THREDDS, plus NOAA ACSPO L3S high-res fronts (AVHRR+VIIRS, 2 km) and NASA MUR gap-free. Chlorophyll: NASA GIBS (L2) + NOAA CoastWatch (gap-filled). Radar: NWS / Iowa State. Bathymetry: Esri Ocean Basemap.
Spot pins: solid diamond = charted feature/buoy; hollow amber diamond = approximate community mark — confirm on your plotter.
Reports are the dated public ones from the latest scan — stripers are well-covered; bluefin/canyon are sparse & early because the live tuna intel lives in closed Facebook groups, the MFCC members' forum, and DMs that web search can't reach.
Paste screenshots/texts from your groups and Claude will plot them as fresh pins.