Rare Snow and Hail Hit Tri-Valley Region

Residents report snow on local mountains and hail in Dublin and Pleasanton

Published on Feb. 23, 2026

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The Tri-Valley region of the San Francisco Bay Area experienced unusual winter weather on Wednesday, with residents reporting snow on local mountains like Mt. Diablo and Mt. Hamilton, as well as hail in the cities of Dublin and Pleasanton. Meteorologists recorded significant snowfall accumulations, including up to 6 inches at the Lick Observatory atop Mt. Hamilton.

Why it matters

Snowfall and hail are relatively rare occurrences in the typically mild Tri-Valley region, making this weather event noteworthy. The snow and hail could impact travel and outdoor activities in the area, and may be an early sign of a more severe winter season to come.

The details

On Wednesday morning, residents across the Tri-Valley reported seeing a dusting of snow on the hills and mountains in the region, including Mt. Diablo, Mt. Hamilton, Mt. St. Helena, and Saratoga Summit. The Lick Observatory at the top of Mt. Hamilton recorded up to 6 inches of snowfall. In addition, some Nextdoor users in Dublin and Pleasanton reported seeing hail on Tuesday night.

  • The snow and hail were reported on Wednesday, February 19, 2026.
  • On Tuesday night, February 18, 2026, residents in Dublin and Pleasanton reported seeing hail.
  • The Lick Observatory at the top of Mt. Hamilton recorded up to 6 inches of snowfall.

The players

Jamey Erikson

The superintendent of the Lick Observatory at the summit of Mt. Hamilton.

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What they’re saying

“As much as six inches was reported on Lick Observatory at the summit of Mt. Hamilton”

— Jamey Erikson, Observatory Superintendent (KRON4)

The takeaway

This rare winter weather event in the typically mild Tri-Valley region is a reminder of the potential for unexpected and extreme weather patterns, even in areas not known for significant snowfall or hail. Residents and local authorities should be prepared to address any impacts on travel, outdoor activities, and infrastructure.