Severe winter storms are expected to hit multiple states in Eastern and Western United States, as well as Southeastern Canada 

Affected by the cold wave, from February 11th to 17th, heavy to severe snowfall is expected in Michigan, Iowa, Colorado, Utah of the United States, as well as in the southeastern part of Ontario and Quebec, Canada, with locally extremely heavy snowfall. The cumulative snowfall during this period can reach 20 to 30 millimeters, with some areas exceeding 40 millimeters; heavy to torrential rain is expected in California, Tennessee, Mississippi, Alabama, Louisiana, Kentucky, and Virginia of the United States, with locally heavy torrential rain (Figure 1). The affected areas will experience winds of 5 to 7 levels, with gusts reaching 8 to 10 levels, and the Saint Lawrence Bay area will have winds of 7 to 9 levels, with gusts of 10 to 11 levels (Figure 2). It is necessary to be vigilant against the adverse effects of the blizzard on power transmission and shipping traffic.

In addition, parts of the central and eastern United States, southeastern Canada, and other areas will experience a temperature drop of 10 to 14 degrees Celsius, with local cooling in Texas, Indiana, and North Carolina exceeding 16 degrees Celsius; the lowest temperature line during this process will be pushed southward to the southern Arizona to Mississippi line (Figure 3).

Figure 1. Accumulated snowfall from February 11 to 17, 2025

(Beijing Time) (Unit: mm)

Figure 2. Maximum gust wind speed at 08:00 (Beijing time) on February 14, 2025 (Unit: m/s)

Figure 3: Minimum Temperature from February 11 to 17, 2025

(Beijing Time) (Unit: mm)

Author: Wei Lingxiang                               Reviewer: Bao Yuanyuan 

English reviewer:Wang Yi                                                                      Issue approver:Dai Kan