Magnetic storms tomorrow
Geomagnetic forecast for tomorrow, Saturday, April 25. Maximum Kp index, hourly outlook and expected storm level (G-class).
Tomorrow's magnetosphere is expected to stay quiet or slightly disturbed.
Magnetosphere is quiet. No geomagnetic disturbances expected.
Hourly forecast · Saturday, April 25 (MSK)
Recommendations
- • At Kp ≥ 5, weather-sensitive individuals should reduce physical load, monitor blood pressure and stay hydrated.
- • Long-distance drivers — extra rest; GPS and radio may have interference.
- • At high latitudes with Kp ≥ 5 auroras are possible — watch after sunset away from city lights.
▸More about tomorrow's forecast
Forecast for tomorrow, Saturday, April 25: expected maximum planetary Kp = 3.3 — level G0. The forecast is based on the NOAA Space Weather Prediction Center 3-day bulletin, published daily at 12:30 UTC. Hourly detail covers eight 3-hour windows.
How to read a Kp forecast: values 0–4 mean a quiet or slightly disturbed magnetosphere; Kp = 5 equals G1 (minor storm); 6 = G2 (moderate); 7 = G3 (strong); 8 = G4 (severe); 9 = G5 (extreme). NOAA combines current solar-wind data from DSCOVR, recent CMEs and solar cycle activity. 1-day forecasts are ~70–80% accurate, 3-day ~50–60%.
If a G1+ storm is expected, weather-sensitive people should prepare in advance: sleep well, avoid alcohol and caffeine, take prescribed medication. Drivers should factor in extra rest — at G3+ GPS and HF radio may glitch. The By city section localises the forecast for your geomagnetic latitude and aurora chance.