Valentines Day Storm of 1940
This powerful storm was a Cat 2 in the Northeast Region and a Cat 1 in the Ohio Valley Region. The storm covered most of Pennsylvania, southern New York, and Massachusetts with over a foot of snow. In Boston, the heavy snow and high winds combined to produce near blizzard conditions making the storm especially bad. (Kocin and Uccellini)
The storm by region
Each region’s thresholds are its own, so the same depth of snow counts for more in the South than in the Northeast.
| Region | Index | Category | Area with snow (sq mi) | People under snow | Above the top threshold (sq mi) | People above it |
|---|---|---|---|---|---|---|
| Northeast | 4.09 | Category 2, Significant | 154,250 | 58,562,128 | 0 | 0 |
| Ohio Valley | 2.08 | Category 1, Notable | 252,502 | 35,524,414 | 28 | 754 |
| Southeast | 0.50 | Below category 1 | 69,489 | 12,325,227 | 0 | 0 |
| South | 0.10 | Below category 1 | 69,960 | 4,776,943 | 0 | 0 |
The Regional Snowfall Index is NOAA’s ranking of snowstorms east of the Rockies by how much snow fell, over how wide an area and on how many people, region by region: the area and the population above four snowfall thresholds set for each region, weighted against that region’s own history. A storm is scored in each region it reached, on a scale from 1, notable, to 5, extreme.
In the Storm Events record
The Storm Events Database holds winter weather only from 1996, so this storm has no episodes there.
More
The snowstorm of January 21 to 24, 1940The snowstorm of March 10 to 15, 1940Snow nowEvery winter storm filed
Sources
NOAA NCEI Regional Snowfall Index, and the Storm Events Database for the episodes.