Weather WorldUpper Big Nemaha Reservoir J-15a, NE 7-Day Night Weather Forecast
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Upper Big Nemaha Reservoir J-15a, NE Weather Forecast
Upper Big Nemaha Reservoir J-15a, NE Weather Forecast Date: 1159 AM CDT Fri Aug 14 2026
The area/counties/county of: Johnson, including the cities of: Tecumseh and Sterling.or toggle through each period.
This Afternoon... Mostly cloudy with a slight chance of thunderstorms. Showers likely early, then a chance of showers. Some thunderstorms May produce heavy rainfall. Highs in the upper 80s. Southeast winds 5 to 10 mph. Chance of rain 70%.
Tonight... Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Some thunderstorms May produce heavy rainfall in the evening. Humid with lows in the lower 70s. East winds around 5 mph, becoming west after midnight. Chance of rain 20%.
Saturday... Mostly cloudy in the morning, then becoming partly sunny. A slight chance of showers. A slight chance of thunderstorms in the afternoon. Humid with highs in the upper 80s. West winds around 5 mph. Chance of rain 20%. Heat index values up to 100 in the afternoon.
Saturday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the upper 60s. North winds 5 to 10 mph. Chance of rain 70%.
Sunday... Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the morning, then partly sunny in the afternoon. Humid with highs in the lower 80s. North winds 5 to 10 mph. Chance of rain 30%.
Sunday Night... Partly cloudy. Lows in the mid 60s.
Monday... Mostly sunny. Highs in the lower 80s.
Monday Night... Mostly clear. Lows in the mid 60s.
Tuesday... Mostly sunny. Highs in the upper 80s.
Tuesday Night... Mostly clear in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows around 70. Chance of rain 50%.
Wednesday... Mostly cloudy with a slight chance of showers and thunderstorms in the morning, then mostly sunny in the afternoon. Highs in the lower 80s. Chance of rain 20%.
Wednesday Night... Partly cloudy in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20%.
POP = Probability of Precipitation
Upper Big Nemaha Reservoir J-15a Radar Loop
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