Live Space Alerts System
Warning: Space Weather Message NOAA :: 5 hours ago
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SurfacePlain English
NOAA has issued a space weather warning 5 hours ago.
A formal warning means conditions hazardous to satellites, GPS accuracy, radio communications, or power grids are expected or already occurring. The specific alert: “Space Weather Message Code: WARK04 Serial Number: 5425 Issue Time: 2026 Oct 04 1901 UTC EXTENDED WARNING: Geomagnet…”
NOAA's Space Weather Prediction Center operates 24/7, 365 days a year, staffed by specialist forecasters, because space weather affects everything from airline navigation to ATM networks. Every credit card transaction that uses GPS-synchronised timing depends on the same satellites that space weather can disrupt.
Alert type
Warning (NOAA)
Issued
5 hours ago
Source
NOAA SWPC
ContextWhy It Matters
NOAA SWPC Warning issued 18 hours ago.
NOAA's Space Weather Prediction Center issues three levels of advisory: Watch (conditions possible in 24–72 hours), Warning (conditions expected within hours), and Alert (threshold already crossed). This Warning indicates forecasters have sufficient confidence that space weather thresholds will be crossed imminently. Full alert text: “Space Weather Message Code: WARK04 Serial Number: 5424 Issue Time: 2026 Oct 04 0613 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Oct 04 0615 UTC Valid To: 2026 Oct 04 2359 UTC”
During the March 1989 geomagnetic storm, Quebec's entire power grid collapsed in 92 seconds, leaving 6 million people without electricity for 9 hours. Since then, both power grid operators and NOAA have invested heavily in early warning systems exactly like this one.
DeepFull Rigour
NOAA SWPC Warning at 2026-10-04 06:13:42.580 UTC.
Issuing authority: NOAA Space Weather Prediction Center, Boulder CO. Product type: Warning — issued when a space weather event is expected to cross operational thresholds within hours. Full message text: “Space Weather Message Code: WARK04 Serial Number: 5424 Issue Time: 2026 Oct 04 0613 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Oct 04 0615 UTC Valid To: 2026 Oct 04 2359 UTC Warning Conditions: Onset Comment: NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.”
Level
Warning
Issued
18 hours ago
Source
NOAA SWPC