NOAA Space Weather Prediction Center
@NWSSWPC
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Safeguarding society with actionable space weather information.
Boulder, CO
Joined August 2015
WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 28: G1 (Minor) Oct 29: G1 (Minor) Oct 30: G1 (Minor) Issue Time: 2025 Oct 28 0010 UTC https://t.co/ZbtuNtJdza
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WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 27: None (Below G1) Oct 28: G1 (Minor) Oct 29: G1 (Minor) Issue Time: 2025 Oct 26 2017 UTC https://t.co/ZbtuNtJdza
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WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 26: None (Below G1) Oct 27: None (Below G1) Oct 28: G1 (Minor) Issue Time: 2025 Oct 25 2055 UTC https://t.co/ZbtuNtJdza
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EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2121 Valid From: 2025 Oct 18 1743 UTC Now Valid Until: 2025 Oct 19 0900 UTC Warning Condition: Persistence Issue Time: 2025 Oct 18 2340 UTC https://t.co/ZbtuNtJdza
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WARNING: Geomagnetic K-Index of 6 expected Valid From: 2025 Oct 18 1952 UTC Valid To: 2025 Oct 18 2359 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Issue Time: 2025 Oct 18 1953 UTC https://t.co/ZbtuNtJdza
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WARNING: Geomagnetic K-index of 5 expected Valid From: 2025 Oct 18 1743 UTC Valid To: 2025 Oct 18 2359 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Issue Time: 2025 Oct 18 1743 UTC https://t.co/ZbtuNtJdza
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WARNING: Geomagnetic K-index of 5 expected Valid From: 2025 Oct 18 0552 UTC Valid To: 2025 Oct 18 1500 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Issue Time: 2025 Oct 18 0553 UTC https://t.co/ZbtuNtJdza
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The anticipated CMEs finally arrived overnight of, but appear to be indicative of very weak nearby passage influences. While the G1 Watch remains in effect for the remainder of Friday, conditions are not favorable at this time.
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For those that have been wondering what the large dark shape moving across CCOR-1 imagery as of late is; well that would be Earth photobombing the camera!
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Sunspot Groups 4250/4248 (center disk) & 4246 (up to right of 4250) dominate the Sun today. This animation (courtesy jhelioviewer) shows the development of 4246 over past 4-5 days - emerging and growing w/ a closeup of it's mag field. Stay aware at https://t.co/TV7Yw6Lq1Y
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Isolated G2 (Moderate) geomagnetic storm activity is likely by late on 16 Oct with the arrival of CMEs that left the Sun over the course of 11-13 Oct. G1 (Minor) geomagnetic storm activity is likely to carry on into 17 Oct.
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WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Oct 15: None (Below G1) Oct 16: G2 (Moderate) Oct 17: G1 (Minor) Issue Time: 2025 Oct 14 1943 UTC https://t.co/ZbtuNtIFJC
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WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 14: None (Below G1) Oct 15: None (Below G1) Oct 16: G1 (Minor) Issue Time: 2025 Oct 13 2109 UTC https://t.co/ZbtuNtJdza
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EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2118 Valid From: 2025 Oct 12 0334 UTC Now Valid Until: 2025 Oct 13 1500 UTC Warning Condition: Persistence Issue Time: 2025 Oct 13 0000 UTC https://t.co/ZbtuNtJdza
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WARNING: Geomagnetic K-Index of 6 expected Valid From: 2025 Oct 12 1913 UTC Valid To: 2025 Oct 12 2359 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Issue Time: 2025 Oct 12 1913 UTC https://t.co/ZbtuNtJdza
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WARNING: Geomagnetic K-index of 5 expected Valid From: 2025 Oct 12 0334 UTC Valid To: 2025 Oct 12 2359 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Issue Time: 2025 Oct 12 0336 UTC https://t.co/ZbtuNtJdza
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WARNING: Geomagnetic K-index of 5 expected Valid From: 2025 Oct 11 0815 UTC Valid To: 2025 Oct 11 2359 UTC Warning Condition: Onset NOAA Scale: G1 - Minor Issue Time: 2025 Oct 11 0816 UTC https://t.co/ZbtuNtJdza
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WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 11: None (Below G1) Oct 12: G1 (Minor) Oct 13: G1 (Minor) Issue Time: 2025 Oct 10 1927 UTC https://t.co/ZbtuNtJdza
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WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 10: None (Below G1) Oct 11: None (Below G1) Oct 12: G1 (Minor) Issue Time: 2025 Oct 09 2115 UTC https://t.co/ZbtuNtJdza
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WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 06: None (Below G1) Oct 07: G1 (Minor) Oct 08: G1 (Minor) Issue Time: 2025 Oct 05 0226 UTC https://t.co/ZbtuNtJdza
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