Precipitation in the Pacific Northwest into the Northern Rockies; Bering Sea Storm in Alaska

A Pacific storm will bring rain and high elevation snow from the Pacific Northwest into the Northern Rockies. A series of storms are expected to move through the Bering Sea bringing strong winds, heavy precipitation, and elevated water levels from the West Coast to northern Alaska. Read More >

Overview

Unusual February thunderstorms developed along a front on Monday the 24th. Conditions came together just enough to form weak, low-topped supercells. While the environment wasn't suitable for strong thunderstorms, there was just enough low-level rotation that was tilted and stretched to form a brief, weak tornado near the borders of Codington, Hamlin, and Deuel counties. Tornado touched down around 4:11pm CST and lasted around a minute in an open field. No damage was observed, and without damage, the tornado will be documented as an Enhanced Fujita Scale Unknown or EF-U. Some storms also produced pea sized hail.

This event was unique because it was the first February tornado to be documented in South Dakota history! The only remaining months with no tornadoes documented in South Dakota are November, December, and January.

There was a stark difference between temperatures the previous week (in the -20s to -30s) and this week's temperatures (highs in the 50s).

Tornado captured by Alex Resel.

Photos & Video
Environment

Photos & Video

Header


Tornado Photo credit: Alex Resel	Wall Cloud/Lightning Photo credit: Alex Resel	Pea Sized Hail in Watertown. Photo credit: Mike Tanner	Pea Sized Hail in Watertown. Photo credit: Mike Tanner

Rainbow near Garden City. Photo credit: Linda Anderson

Environment

Surface Pressure Pattern.


Surface pressure at 18Z on February 24th, 2025	Surface pressure at 21Z on February 24th, 2025	Surface pressure at 00Z on February 25th, 2025

Environmental Parameters around the time of tornado occurrence.


0-1km Effective Storm Relative Helicity at 22Z on February 24th, 2025	0-1km Shear at 22Z on February 24th, 2025	0-1km Storm Relative Helicity at 22Z on February 24th, 2025


LCL Heights at 22Z on February 24th, 2025	Low-Level Lapse Rates at 22Z on February 24th, 2025	Mixed Layer CAPE and Surface Vorticity at 22Z on February 24th, 2025

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Precipitation in the Pacific Northwest into the Northern Rockies; Bering Sea Storm in Alaska

First South Dakota Tornado in February