# NOAA forecasts minor geomagnetic storm conditions for 31 October–1 November

> NOAA’s Space Weather Prediction Center forecast minor, G1-level geomagnetic storm conditions for 31 October and 1 November in its three-day bulletin issued at 00:30 UTC on 31 October. The forecast attributes the expected disturbance to a high-speed solar-wind stream from a coronal hole.

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- Publisher: Newsverum
- Section: Science
- Country: United States
- Published: 2026-10-31T07:46:41+00:00
- Updated: 2026-10-31T07:46:41+00:00
- Event / data period: 2026-10-31
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The bulletin’s highest expected three-hour planetary Kp index is 5.00 during the forecast period through 2 November. It expects unsettled conditions on 2 November as the stream’s influence weakens. The largest observed three-hour Kp value during the preceding 24 hours was 4, below NOAA’s geomagnetic-storm scale threshold.

The same bulletin expects no minor-or-greater solar radiation storms or radio blackouts during the period. These are separate space-weather categories from geomagnetic activity. G1 conditions are a forecast, not a report that a new storm has already been observed, and the bulletin does not guarantee aurora visibility at any particular location.

## Data

### Source publication

Publication of the official announcement on 31 October 2026.

Methodology: The date records publication of the cited primary source. Statistical reference periods and announced future actions are identified in the article.

| date | label | description | status |
|---|---|---|---|
| 2026-10-31 | NOAA forecasts minor geomagnetic storm conditions for 31 October–1 November | NOAA’s Space Weather Prediction Center forecast minor, G1-level geomagnetic storm conditions for 31 October and 1 November in its three-day bulletin issued at 00:30 UTC on 31 October. The forecast attributes the expected disturbance to a high-speed solar-wind stream from a coronal hole. | occurred |

Sources: <https://services.swpc.noaa.gov/text/3-day-forecast.txt> · Download data: [JSON](https://newsverum.com/api/v1/articles/us-noaa-minor-geomagnetic-storm-forecast-october-31-2026/data/source-announcement?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/us-noaa-minor-geomagnetic-storm-forecast-october-31-2026/data/source-announcement?lang=en&format=csv)

## Sources

- [NOAA Space Weather Prediction Center](<https://services.swpc.noaa.gov/text/3-day-forecast.txt>) (Source checked: 2026-10-31; Published: 2026-10-31)

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