Black Calf Reservoir

Valley County, MT

MAYBEConfidence · Medium
Best bite window
The highlighted window has passed. This read is still based on the latest cached weather; use the 7-Day forecast below for the next window.
Main reason
dry conditions across the window
Main risk
a front passing through

MAYBE on Black Calf 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).

Next forecast window
MAYBE

Wed · Oct 28, 4 PM → 8 PM (America/Denver)

Full read

The latest cached fishing-weather read for Black Calf Reservoir in Valley County, MT is MAYBE. Its highlighted window has passed, so use the 7-day forecast below for the next available window. The main factor in its favor was dry conditions across the window, while the main watch-out was a front passing through. Its cached forecast evidence included wind near 7 mph out of the east, gusting to 13 mph; surface pressure near 923 hPa on an unstable trend; 0.00 inches of rain; and air temperature near 27 °F with clear dominant. Confidence in this cached read is medium; it was generated October 26, 2026, 9:23 AM UTC, and reads refresh on a daily cadence. This is a weather-only read built from forecast weather; it does not yet use on-water reports, and confidence is capped until local water data or feedback exists.

UPDATED October 26, 2026, 9:23 AM UTCBUCKET 2026-10-26ENGINE 0.7.0

Conditions at a glance

Wind
7mph

E · gust 13

Rain / Weather
0in

Clear

Temp
27°F

-3°C · hum 80%

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
    43° / 27°F
    7 mph · Egust 32
    0.00 in
    ↓ -13.8 hPa
  2. Tue · Oct 27
    6 AM → 10 AM
    SKIP
    A front passing through
    41° / 34°F
    12 mph · SEgust 31
    0.22 in
    ↓ -7.5 hPa
  3. Wed · Oct 28
    4 PM → 8 PM
    MAYBE
    A front passing through
    43° / 30°F
    13 mph · Wgust 25
    0.00 in
    ↑ +13.1 hPa
  4. Thu · Oct 29
    2 PM → 6 PM
    MAYBE
    A front passing through
    37° / 27°F
    7 mph · NWgust 21
    0.00 in
    ↑ +6.4 hPa
  5. Fri · Oct 30
    4 AM → 8 AM
    MAYBE
    A front passing through
    45° / 28°F
    7 mph · Egust 31
    0.00 in
    ↓ -13.5 hPa
  6. Sat · Oct 31
    4 AM → 8 AM
    MAYBE
    A front passing through
    52° / 36°F
    4 mph · SEgust 16
    0.00 in
    → +1.0 hPa
  7. Sun · Nov 1
    4 AM → 8 AM
    MAYBE
    A front passing through
    50° / 39°F
    4 mph · Sgust 9
    0.00 in
    ↓ +0.4 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+23.4 hPa over 72h
Rain
Light rain
0.21 in totallast 72h
Wind
Gusty
12 mph · gust 43 · N
Temperature
Cooler
-16.0°F over 72h63–25°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.