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Level of the Lake

Inflow forecast

modeled

NOAA’s National Water Model, short-range run issued Nov 14, 3 PM CST, for the 1 gauged tributary reach feeding Canyon Lake. The model includes rain that has already fallen plus the near-term rain forecast.

Gauged inflow now

287

cfs · measured

Peak next 17h

288

cfs · ~8 PM CST · modeled

Projected volume

398

acre-feet over 17h · modeled

Net lake effect

+0.03 ft

after 103 cfs out · inferred

Projected flow by tributary reach

851702545 PM1 AM9 AM
Forecast inflow, next 16 hours, all gauged reaches: starts at 285 cfs, peaks at 288 cfs Sat 8 PM (modeled)
HourTotal (cfs)Guadalupe (cfs)
Sat 5 PM285285
Sat 6 PM286286
Sat 7 PM287287
Sat 8 PM288288
Sat 9 PM288288
Sat 10 PM288288
Sat 11 PM287287
Sun 12 AM287287
Sun 1 AM286286
Sun 2 AM285285
Sun 3 AM283283
Sun 4 AM282282
Sun 5 AM280280
Sun 6 AM278278
Sun 7 AM276276
Sun 8 AM274274
Sun 9 AM272272
GuadalupeTotal (all gauged reaches)

Dashed lines are forecast. Values are at the gauges; water takes hours to a couple of days to get from there to the lake. National Water Model via NOAA/NWS · public domain.

The “net lake effect” is the forecast inflow volume minus the water leaving the lake now (103 cfs, Guadalupe at Sattler, right now), held steady over the forecast period and spread over today’s surveyed surface area (TWDB) (before releases it would be +0.05 ft). It ignores travel time, channel losses and any change the dam operators make, so it gives a sense of scale, not a prediction. During floods, watch the main page instead.