Rainfall and Pressure Explained
Aug 18, 2025 • Weather Pulse Now
Rainfall is the measure that is usually measured in millimeters (mm). A forecast of 18.5 mm means there heavy showers are expected that is enough to cause puddles or minor flooding in some down areas.
Meanwhile, atmospheric pressure at ~1013 hPa is the standard atmospheric pressure. Low pressure often indicates unsettled conditions such as rain or storms, while high pressure brings clearer skies.
By tracking rainfall and pressure on Weather Pulse Now, you can prepare for sudden weather shifts and plan safer activities outdoors.
| 🌧️ Rainfall | Range | Description | Light Rain | < 2.5 mm/hour | Light drizzle or showers |
|---|---|---|
| Moderate Rain | 2.6 – 7.6 mm/hour | Steady rain, noticeable but manageable |
| Heavy Rain | > 7.6 mm/hour | Downpour, may cause local flooding |
| 🌧️ Daily Rainfall Totals | ||
| Light Showers | < 10 mm/day | Scattered showers, minimal impact |
| Moderate Rain | 10 – 50 mm/day | Widespread rain, moderate wet conditions |
| Heavy Rain / Flood Risk | > 50 mm/day | Risk of flooding, travel disruption possible |
| 🌡️ Pressure | Range | Weather Indication |
|---|---|---|
| Standard Pressure | ~1013 hPa | Normal sea level atmospheric pressure |
| High Pressure | > 1020 hPa | Clear skies, calm, and dry weather |
| Low Pressure | < 1000 hPa | Cloudy, rainy, or stormy conditions |
| Very Low Pressure | < 980 hPa | Strong storms, cyclones, or hurricanes |