Upper Big Nemaha Reservoir J-15A

Johnson County, NE

GOConfidence · 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

GO on Upper Big Nemaha Reservoir J-15A — light winds and rising pressure after a passing system for this window. Weather-only read (no on-water history calibrating this yet).

Next forecast window
GO

Fri · Sep 11, Now → 8 AM (America/Chicago)

Full read

The latest cached fishing-weather read for Upper Big Nemaha Reservoir J-15A in Johnson County, NE is GO. 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. Its cached forecast evidence included wind near 7 mph out of the northeast, gusting to 12 mph; surface pressure near 971 hPa on a rising trend; 0.00 inches of rain; and air temperature near 73 °F with overcast 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

NE · gust 12

Rain / Weather
0in

Overcast

Temp
73°F

23°C · hum 59%

Pressure
28.67inHg

Rising

7-Day Fishing Forecast

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

  1. Thu · Sep 10
    Window passed
    GO
    Dry conditions across the window
    84° / 66°F
    7 mph · NEgust 16
    0.00 in
    ↓ -3.9 hPa
  2. Fri · Sep 11
    Now → 8 AM
    GO
    Dry conditions across the window
    91° / 68°F
    6 mph · Sgust 25
    0.00 in
    ↓ -6.7 hPa
  3. Sat · Sep 12
    6 AM → 10 AM
    GO
    Dry conditions across the window
    91° / 64°F
    7 mph · Wgust 28
    0.09 in
    ↑ +8.9 hPa
  4. Sun · Sep 13
    11 AM → 3 PM
    MAYBE
    Dry conditions across the window
    91° / 64°F
    15 mph · SEgust 35
    0.61 in
    ↓ -5.6 hPa
  5. Mon · Sep 14
    5 PM → 9 PM
    MAYBE
    Moderate wind
    100° / 70°F
    10 mph · NWgust 40
    0.41 in
    ↓ +2.7 hPa
  6. Tue · Sep 15
    2 PM → 6 PM
    GO
    Dry conditions across the window
    70° / 61°F
    7 mph · Egust 25
    1.28 in
    ↑ +9.3 hPa
  7. Wed · Sep 16
    2 PM → 6 PM
    MAYBE
    Dry conditions across the window
    64° / 59°F
    11 mph · NEgust 22
    1.40 in
    ↑ +2.8 hPa

Last 3 days

Recent context — what just happened

Pressure
Rising
+2.8 hPa over 72h
Rain
Wet stretch
0.63 in totallast 72h
Wind
Gusty
9 mph · gust 30 · SE
Temperature
Warmer
+4.1°F over 72h100–68°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.