Upper Big Nemaha Reservoir 21-B

Lancaster County, NE

MAYBEConfidence · Low
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 Upper Big Nemaha Reservoir 21-B — 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).

Next forecast window
MAYBE

Fri · Jul 24, 4 AM → 8 AM (America/Chicago)

Full read

The latest cached fishing-weather read for Upper Big Nemaha Reservoir 21-B in Lancaster County, NE 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 6 mph out of the south, gusting to 14 mph; surface pressure near 971 hPa on a rising trend; 0.00 inches of rain; and air temperature near 68 °F with overcast dominant. Confidence in this cached read is low; it was generated July 23, 2026, 11:45 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 July 23, 2026, 11:45 AM UTCBUCKET 2026-07-23ENGINE 0.7.0

Conditions at a glance

Wind
6mph

S · gust 14

Rain / Weather
0in

Overcast

Temp
68°F

20°C · hum 81%

Pressure
28.67inHg

Rising

7-Day Fishing Forecast

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

  1. Thu · Jul 23
    Window passed
    MAYBE
    A front passing through
    75° / 63°F
    6 mph · Sgust 16
    0.04 in
    ↓ -4.0 hPa
  2. Fri · Jul 24
    4 AM → 8 AM
    MAYBE
    A front passing through
    84° / 66°F
    7 mph · SEgust 25
    0.16 in
    ↓ -3.0 hPa
  3. Sat · Jul 25
    7 AM → 11 AM
    MAYBE
    A front passing through
    106° / 72°F
    6 mph · SWgust 32
    0.00 in
    ↓ -3.1 hPa
  4. Sun · Jul 26
    10 AM → 2 PM
    SKIP
    Sustained high wind
    113° / 82°F
    16 mph · SWgust 36
    0.02 in
    ↓ -4.2 hPa
  5. Mon · Jul 27
    10 AM → 2 PM
    MAYBE
    A front passing through
    111° / 86°F
    7 mph · Ngust 44
    0.00 in
    ↓ -2.9 hPa
  6. Tue · Jul 28
    4 AM → 8 AM
    MAYBE
    A front passing through
    97° / 79°F
    7 mph · Egust 21
    0.00 in
    ↑ +6.6 hPa
  7. Wed · Jul 29
    7 AM → 11 AM
    MAYBE
    A front passing through
    106° / 72°F
    3 mph · Sgust 29
    0.00 in
    ↓ -0.7 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+8.3 hPa over 72h
Rain
Dry stretch
0.00 in totallast 72h
Wind
Calm wind
6 mph · gust 21 · N
Temperature
Cooler
-15.7°F over 72h97–64°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.