Old Thunder Slough

Blaine County, MT

MAYBEConfidence · Medium
Best bite window
Tue · Oct 27, 8 AM → 12 PM (America/Denver)
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on Old Thunder Slough — light winds and rising pressure after a passing system for this window. Watch a front passing through and pressure swinging. Weather-only read (no on-water history calibrating this yet).

Full read

The current fishing-weather read for Old Thunder Slough in Blaine County, MT is MAYBE, with the best four-hour window on Tue, Oct 27 from 8 AM to 12 PM (America/Denver). The main factor in its favor is dry conditions across the window, and the main watch-out is a front passing through. During that window the forecast calls for wind near 7 mph out of the south, gusting to 16 mph, surface pressure near 923 hPa on an unstable trend, and rainfall totaling 0.02 inches over the four hours. Air temperature in the window sits near 39 °F, with a dominant forecast of light drizzle. Confidence in this read is medium; it was generated October 26, 2026, 9:24 AM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather alone; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED October 26, 2026, 9:24 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
7mph

S · gust 16

Rain / Weather
0.02in

Light drizzle

Temp
39°F

4°C · hum 91%

Pressure
27.26inHg

Unstable

7-Day Fishing Forecast

One read per day — the bite call, the window, the weather behind it

  1. Mon · Oct 26
    Window passed
    MAYBE
    A front passing through
    50° / 30°F
    11 mph · Egust 26
    0.00 in
    ↓ -14.2 hPa
  2. Tue · Oct 27
    8 AM → 12 PM
    MAYBE
    A front passing through
    45° / 36°F
    7 mph · Sgust 38
    0.12 in
    ↓ -4.0 hPa
  3. Wed · Oct 28
    7 PM → 11 PM
    MAYBE
    A front passing through
    45° / 32°F
    7 mph · NWgust 22
    0.00 in
    ↑ +12.8 hPa
  4. Thu · Oct 29
    1 PM → 5 PM
    MAYBE
    A front passing through
    39° / 28°F
    7 mph · NWgust 17
    0.00 in
    ↑ +4.5 hPa
  5. Fri · Oct 30
    6 PM → 10 PM
    MAYBE
    A front passing through
    50° / 30°F
    7 mph · Egust 29
    0.00 in
    ↓ -14.0 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    55° / 37°F
    7 mph · NWgust 19
    0.00 in
    ↑ +2.4 hPa
  7. Sun · Nov 1
    4 AM → 8 AM
    MAYBE
    A front passing through
    55° / 43°F
    6 mph · SEgust 7
    0.00 in
    ↓ +0.2 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+23.0 hPa over 72h
Rain
Light rain
0.47 in totallast 72h
Wind
Gusty
11 mph · gust 40 · NE
Temperature
Cooler
-19.4°F over 72h54–28°F range

Weather-only read. Confidence is capped until local water data or feedback exists.

Nearby waters

Weather data by Open-Meteo — CC BY 4.0. Fishing Weather derives the fishing read.