(Image Credit: CFJC Today)
Snowpack Report

Higher-than-normal temperatures behind fast snowpack melt in BC Interior

May 21, 2026 | 11:00 AM

KAMLOOPS — Snowpack levels in the North and South Thompson are depleting faster than normal this spring due to warmer-than-average weather conditions.

In the May 15 Snow Conditions and Water Supply Bulletin, the province says the North Thompson is sitting at 88 per cent of normal while the South Thompson is at 49 per cent.

The Ministry of Water, Lands and Resource Stewardship (MWLRS) said this is a reduction of 13 (from 101) and 20 (from 69) percentage points respectively since the start of the month.

Looking at year-over-year statistics, snowpack levels are up by 10 percentage points in the North Thompson from May 15, 2025, but down 20 in the South Thompson.

The ministry said the rapid drop between May 1 and 15 is due to high seasonal temperatures seen in the first half of the month.

“Warm temperatures during the first week of May continued the rapid melt of the lower- and mid-elevation snowpack, with many locations across B.C. measuring record high maximum temperatures for the dates May 3-4,” said MWLRS officials.

“Beginning May 13, temperatures dropped to well below normal for several days, accompanied by modest precipitation associated with a low-pressure system.”

The ministry expects weather to stay relatively warm over the coming days.

“The upcoming 10-day forecast generally indicates seasonal to slightly above seasonal temperatures, with the potential for stronger storm systems to impact some areas of the province,” said the MWLRS.

Provincially, B.C. as a whole decreased from 83 per cent of normal levels on May 1 to 71 per cent on May 15. While it is down 12 percentage points from the start of the month, it is a 10-point increase over May 15, 2025.