SWPC has issued a G2 (Moderate) geomagnetic storm Watch for 11 Oct 2026. The Watch covers the expected arrival of two coronal mass ejections (CMEs) that left the Sun on 07 and 08 Oct. The 08 Oct CME ...

G1 (Minor) to G2 (Moderate) geomagnetic storms are likely on 09 Oct with the arrival of a CME that was associated with a M1.4 flare from Active Region 4549 on 06 Oct. A high chance for additional ...

A daily deterministic and probabilistic forecast, for next three days, of geomagnetic activity. Observed values of Ap and deterministic Ap forecasts are provided, followed by probabilistic forecasts ...

Similar to the bulletins put out by the NWS local forecast offices, SWPC provides Alerts, Watches and Warnings to the public at large about what to expect from Space Weather. These bulletins are ...

The modeling system consists of two sub models: 1) Wang-Sheeley-Arge (WSA), semi-empirical near-Sun model which approximates the outflow at the base of the solar wind; and 2) Enlil, a sophisticated ...

A daily deterministic and probabilistic forecast, for next three days, of geomagnetic activity. Observed values of Ap and deterministic Ap forecasts are provided, followed by probabilistic forecasts ...

This is a short-term forecast of the location and intensity of the aurora. This product is based on the OVATION model and provides a 30 to 90 minute forecast of the location and intensity of the ...

Solar wind data refers to in situ magnetic field, solar wind plasma, and particle data from any spacecraft located upwind of Earth, typically orbiting the L1 Lagrange point, that is available to SWPC ...

The Station A and K indices show the fluctuations in the magnetic field, tied to specific geographic locations. The indices have a range from 0 to 9 and are directly related to the maximum amount of ...

The K-index, and by extension the Planetary K-index, are used to characterize the magnitude of geomagnetic storms. Kp is an excellent indicator of disturbances in the Earth's magnetic field and is ...

This is a prediction of the intensity and location of the aurora borealis tonight and tomorrow night over North America. This product is based on the OVATION model and uses the maximum forecast ...