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Onalaska Middle School Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Mostly Sunny | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 79°FHi: 26°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 50°FLo: 10°C | Hi: 75°FHi: 24°C Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C Lo: 59°FLo: 15°C | Hi: 70°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 70°FHi: 21°C Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C |
| POP: 50% | POP: 40% | POP: 50% | POP: 90% | POP: 90% | POP: 30% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 842 AM CDT Fri Sep 11 2026 
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Issued: 616 AM CDT Fri Sep 11 2026
Key Messages
- Shower and storm chances return tonight into Saturday morning (30 to 60%). Severe potential is low (<10%) with these storms.
- Widespread rain is likely Monday into Tuesday (70 to 90%) with the potential for localized flooding.
Discussion
... Issued at 1239 AM CDT Fri Sep 11 2026
Today Through Sunday: Trending Cooler with Some Storm Chances
An upper level low pressure system sitting over the northern Canadian Prairie provinces should slowly move east today. As this occurs, a weak surface front is forecast to move...