Black Calf Reservoir

Valley County, MT

MAYBEConfidence · Medium
Best bite window
Now → 8 AM (America/Denver)
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. Weather-only read (no on-water history calibrating this yet).

Full read

The current fishing-weather read for Black Calf Reservoir in Valley County, MT is MAYBE, with the best four-hour window on Fri, Sep 11 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 northwest, gusting to 14 mph, surface pressure near 910 hPa on a rising trend, and rainfall totaling 0.00 inches over the four hours. Air temperature in the window sits near 52 °F, with a dominant forecast of overcast. Confidence in this read is medium; it was generated September 10, 2026, 1:24 PM 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 September 10, 2026, 1:24 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
6mph

NW · gust 14

Rain / Weather
0in

Overcast

Temp
52°F

11°C · hum 63%

Pressure
26.87inHg

Rising

7-Day Fishing Forecast

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

  1. Thu · Sep 10
    Window passed
    MAYBE
    A front passing through
    81° / 48°F
    12 mph · SWgust 36
    0.00 in
    ↓ -5.0 hPa
  2. Fri · Sep 11
    Now → 8 AM
    MAYBE
    A front passing through
    59° / 50°F
    6 mph · NWgust 24
    0.17 in
    ↑ +10.8 hPa
  3. Sat · Sep 12
    4 AM → 8 AM
    MAYBE
    A front passing through
    54° / 46°F
    7 mph · NWgust 16
    0.00 in
    → +3.1 hPa
  4. Sun · Sep 13
    4 AM → 8 AM
    MAYBE
    A front passing through
    57° / 43°F
    9 mph · Egust 21
    0.24 in
    ↓ -8.7 hPa
  5. Mon · Sep 14
    4 AM → 8 AM
    MAYBE
    A front passing through
    54° / 46°F
    5 mph · Egust 27
    0.19 in
    ↑ +7.7 hPa
  6. Tue · Sep 15
    7 AM → 11 AM
    MAYBE
    A front passing through
    54° / 48°F
    3 mph · SEgust 17
    0.01 in
    ↑ +5.0 hPa
  7. Wed · Sep 16
    4 AM → 8 AM
    MAYBE
    A front passing through
    63° / 45°F
    4 mph · NWgust 17
    0.00 in
    ↓ -1.8 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+3.6 hPa over 72h
Rain
Wet stretch
2.33 in totallast 72h
Wind
Gusty
14 mph · gust 47 · W
Temperature
Cooler
-10.1°F over 72h75–46°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.