The storm originated from an area of low pressure that developed in the western Gulf of Mexico along an Arctic cold front on January 20.

[1][2] Early on January 21, a low pressure area was located in the western Gulf of Mexico, connected to a cold front.

Fueled by an Arctic cold front moving through the southern United States, the low produced an area of snowfall, sleet, and freezing rain across the U.S. Gulf Coast from Texas to Florida.

[3] The remnants of the blizzard subsequently crossed the Atlantic Ocean and developed into Storm Éowyn, which brought historic impacts to Ireland, Isle of Man and the United Kingdom and mildly affected western Norway.

[6][7] The Electric Reliability Council of Texas said they had made preparations in order to avoid a situation similar to the 2021 crisis.

[9] Freezing rain and snow took place in the Houston area which had started on the evening of January 20 and continued into January 21, with up to 6 inches (15 cm) of snow falling near La Porte and up to 0.18 inches (4.6 mm) of freezing rain falling near League City.

[12] Many major roadways in Houston had snow and ice accumulation on them by early morning on January 21, which led to dozens of road closures.

[12] Two more people died, one in a crash on January 19 in Harris County after her car collided head-on with a tractor trailer and a homeless man was found dead the following morning in Katy.

For the first time on record, the National Weather Service issued a blizzard warning for parts of southwestern Louisiana, covering Vermillion, Jefferson Davis, Acadia, Cameron, Lafayette and Calcasieu parishes, due to heavy snowfall and winds exceeding 35 mph (56 km/h).

[14][19][20] The heavy snowfall and icy conditions led to the closure of major highways, including I-10, causing significant disruptions to transportation.

[33] Governor Brian Kemp warned on January 21 that the storm could wreak "havoc" on the city of Atlanta due to its unpredictable nature and shifting more north then initially projected.

The snowfall totals are displayed in the table below, sourced from NWS: On January 20, Florida Governor, Ron DeSantis, declared a state of emergency for the incoming winter weather.

[41] The Florida House of Representatives and Senate cancelled all of the committee meetings that were scheduled to occur during the week of January 20.