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High Severity Rainfall Alert Issued for Florianopolis
Florianopolis, Brazil, is forecasted to experience 42.8 mm of precipitation on September 11, 2026. The anticipated rainfall exceeds the automated system's high-severity threshold of 30 mm.
An automated weather monitoring system on wweather1.com triggered a high-severity rain alert for Florianopolis, Brazil. The alert event is marked as starting at 00:00:00 UTC on September 11, 2026.
According to the forecast data for September 11, 2026, the expected precipitation value reaches 42.8 mm. This total surpasses the predefined threshold set at 30 mm.
The system generated the notification automatically after processing wweather1.com forecast data and detecting that the precipitation metric crossed the designated trigger limit.
Why it is dangerous and what to do
⚠️ Safety
• Monitor official local advisories and weather updates.
• Avoid driving or walking through flooded roads and low-lying areas.
• Ensure household drainage paths are clear of blockage.
📊 The numbers, from wweather1 data
Florianópolis: now +17°, Rain showers.
That is 1° above the September climate norm.
The record for this date is +34° (2024).
Three-day forecast: 11 September: +22°/+17° · 12 September: +21°/+16° · 13 September: +19°/+16°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates. 🌍 Weather in nearby cities
São Paulo
now
☀️
+17°
Rio de Janeiro
now
⛅
+22°
Curitiba
now
☀️
+16°
Porto Alegre
now
☁️
+16°
Guarulhos
now
☀️
+17°
Campinas
now
☀️
+20°
📰 Data source: wweather1. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.