Houston, Texas – A G4 (Severe) geomagnetic storm, in effect for Jan. 20, is expected to reach Earth as an unusual Arctic cold outbreak pushes into the Gulf Coast, drawing attention to power reliability and critical infrastructure across a region less accustomed to extreme winter demand.
According to the NOAA Space Weather Prediction Center, a coronal mass ejection, or CME, launched from the Sun late last week is forecast to arrive late Sunday into Monday. While the Gulf Coast sits well south of the regions most affected by geomagnetic storms, severe events can still influence large-scale power transmission systems, satellite operations, GPS accuracy, and radio communications.
The alert encompasses Texas, Louisiana, Mississippi, Alabama, and the Florida Panhandle, where Arctic air is forecast to bring hard freezes, sub-freezing wind chills, and increased heating demand. Officials stress that widespread power outages are not expected, but the overlap of rare cold and heightened grid monitoring is notable in a region where infrastructure is less frequently tested by prolonged freezing temperatures.
For most residents, the solar storm itself will not be noticeable. Experts explain that the concern lies in timing: extreme cold sharply increases electricity demand, while geomagnetic activity can slightly reduce the grid’s operating margin, prompting utilities to take precautionary steps.
Power providers typically increase system monitoring during geomagnetic storms and cold-weather events, particularly to protect transformers and transmission equipment. Residents are encouraged to follow standard cold-weather precautions, including protecting pipes, charging electronic devices, and preparing for freezing conditions.
Cell phone service and internet connectivity are expected to remain largely unaffected.
Aurora displays are unlikely along the immediate Gulf Coast but may be visible farther north if storm conditions intensify.
Geomagnetic activity could ease into Tuesday, even as cold temperatures linger across the southern United States.
