Cornwell Reservoir

Valley County, MT

MAYBEConfidence · Medium
Best bite window
Wed · Oct 28, 4 AM → 8 AM (America/Denver)
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on Cornwell Reservoir — 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 Cornwell Reservoir in Valley County, MT is MAYBE, with the best four-hour window on Wed, Oct 28 from 4 AM to 8 AM (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 6 mph out of the west, gusting to 21 mph, surface pressure near 919 hPa on an unstable trend, and rainfall totaling 0.00 inches over the four hours. Air temperature in the window sits near 36 °F, with a dominant forecast of overcast. Confidence in this read is medium; it was generated October 26, 2026, 9:17 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, 9:17 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
6mph

W · gust 21

Rain / Weather
0in

Overcast

Temp
36°F

2°C · hum 95%

Pressure
27.14inHg

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
    45° / 28°F
    12 mph · Egust 34
    0.00 in
    ↓ -13.4 hPa
  2. Tue · Oct 27
    8 AM → 12 PM
    SKIP
    Heavy rain in the forecast
    43° / 34°F
    12 mph · SEgust 34
    0.37 in
    ↓ -7.3 hPa
  3. Wed · Oct 28
    4 AM → 8 AM
    MAYBE
    A front passing through
    45° / 34°F
    6 mph · Wgust 27
    0.00 in
    ↑ +11.9 hPa
  4. Thu · Oct 29
    4 AM → 8 AM
    MAYBE
    A front passing through
    39° / 28°F
    6 mph · NWgust 17
    0.00 in
    ↑ +6.3 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    MAYBE
    A front passing through
    48° / 30°F
    9 mph · Egust 34
    0.00 in
    ↓ -13.9 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    54° / 39°F
    4 mph · Egust 25
    0.00 in
    ↑ +1.6 hPa
  7. Sun · Nov 1
    7 AM → 11 AM
    MAYBE
    A front passing through
    52° / 41°F
    4 mph · SEgust 11
    0.00 in
    → +0.7 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+23.6 hPa over 72h
Rain
Light rain
0.19 in totallast 72h
Wind
Gusty
14 mph · gust 42 · NE
Temperature
Cooler
-18.2°F over 72h63–28°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.