Necessity Reservoir

Powder River 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 Necessity 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

Fri · Sep 11, 5 AM → 9 AM (America/Denver)

Full read

The latest cached fishing-weather read for Necessity Reservoir in Powder River 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 southwest, gusting to 21 mph; surface pressure near 885 hPa on an unstable trend; 0.00 inches of rain; and air temperature near 64 °F with clear dominant. Confidence in this cached read is medium; it was generated September 10, 2026, 1:19 PM 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 September 10, 2026, 1:19 PM UTCBUCKET 2026-09-10ENGINE 0.7.0

Conditions at a glance

Wind
7mph

SW · gust 21

Rain / Weather
0in

Clear

Temp
64°F

18°C · hum 31%

Pressure
26.13inHg

Unstable

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
    84° / 50°F
    7 mph · SWgust 21
    0.00 in
    ↓ -15.6 hPa
  2. Fri · Sep 11
    5 AM → 9 AM
    MAYBE
    A front passing through
    79° / 54°F
    4 mph · NWgust 32
    0.00 in
    ↑ +13.4 hPa
  3. Sat · Sep 12
    4 AM → 8 AM
    MAYBE
    A front passing through
    68° / 52°F
    6 mph · NEgust 33
    0.00 in
    ↓ -3.2 hPa
  4. Sun · Sep 13
    9 AM → 1 PM
    SKIP
    Sustained high wind
    70° / 50°F
    18 mph · Egust 33
    0.14 in
    ↓ -4.3 hPa
  5. Mon · Sep 14
    6 PM → 10 PM
    MAYBE
    A front passing through
    61° / 41°F
    13 mph · Ngust 34
    0.00 in
    ↑ +13.3 hPa
  6. Tue · Sep 15
    4 AM → 8 AM
    MAYBE
    A front passing through
    64° / 39°F
    4 mph · SEgust 24
    0.00 in
    ↓ -1.4 hPa
  7. Wed · Sep 16
    8 AM → 12 PM
    MAYBE
    A front passing through
    70° / 46°F
    3 mph · Ngust 17
    0.01 in
    ↓ +1.3 hPa

Last 3 days

Recent context — what just happened

Pressure
Unstable
+15.2 hPa over 72h
Rain
Dry stretch
0.00 in totallast 72h
Wind
Gusty
9 mph · gust 36 · NW
Temperature
Cooler
-16.6°F over 72h81–43°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.

Necessity Reservoir Fishing Forecast - 7-Day Windows (MT)