ARROWHEAD RUN AT THAYERVILLE, MD

Not ranked: USGS has fewer than 10 years of daily flows for this date here.

Rising over 24 hours: discharge up 125.5%, from 0.47 to 1.06 ft³/s. Rising or falling means a change of more than 10% in discharge (or 0.2 ft of gauge height) over 24 hours; our rule of thumb, not a USGS class.

• Rising water. Rising over the last 24 hours (discharge up 126%). Keep your way back to the bank in sight and watch the level while you fish. “Rising” is our rule of thumb: more than 10% in discharge or 0.2 ft of gauge height in 24 hours, not a USGS or NWS class.

• Turn Around Don't Drown. “A mere 6 inches of fast-moving flood water can knock over an adult.” No flow number makes a crossing safe; if in doubt, stay out.

  Turn Around Don't Drown (National Weather Service)

Guidance from the readings above and the published thresholds named with each line; not a fishing forecast, a safety guarantee or a statement about access. Local rules and closures come first.

USGS gauge page USGS statistics

Checked Nov 5, 8:58 PM EST; readings refresh at most every 15 minutes and statistics daily. Provisional USGS data can be revised. Conditions change: re-check before you go. This is general guidance, not a fishing forecast, a safety guarantee or a statement about access.