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Johnson High School Weather Forecast
| REST OF TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY |
 |  |  |  | |  |  |  |  | | | |
| Chance of T-Storm | Chance of T-Storm | Chance of Showers | Showers Likely | Chance of Showers | Partly Cloudy | Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 60°FLo: 16°C | Hi: 79°FHi: 26°C |
| POP: 70% | POP: 50% | POP: 80% | POP: 60% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1012 PM EDT Wed Sep 02 2026 
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Issued: 345 AM EDT Thu Sep 3 2026
Key Messages
- Warm and humid again today with heat indices in the 90s, the warmest of which will be found closer to the MI/OH border and into the Metro region.
- There is a Marginal to Slight Risk for severe weather today. Severe weather development will be possible at all times today, but most favorable timing will be this afternoon into late tonight.
- Shower and thunderstorm chances continue into tomorrow.
Discussion
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For this morning... SPC mesoanalysis continues to showcase MUCAPE values around 2...