Normally by April 15, mountain snowpack reaches its peak accumulation. The total percent of average SWE accumulation are shown the first of each month through May. From May to July, percentages are a percent of the peak SWE accumulation for the year indicating the snow remaining to melt.
![The image is updated regularly from October - typically through April as mountain snow begins to accumulate in the reaches above Garrison and Fort Peck. The plots show the accumulation of snow water equivalent each month along a trendline. A solid blue graphic shows the current accumulation red is the average. Blue is the peak accumulation green is the minimum accumulation and occasionally other significant year's accumulation trendlines will be noted. A pdf 508 readable text version is available at the link. The image is updated regularly from October - typically through April as mountain snow begins to accumulate in the reaches above Garrison and Fort Peck. The plots show the accumulation of snow water equivalent each month along a trendline. A solid blue graphic shows the current accumulation red is the average. Blue is the peak accumulation green is the minimum accumulation and occasionally other significant year's accumulation trendlines will be noted. A pdf 508 readable text version is available at the link.](https://www.nwd-mr.usace.army.mil/rcc/reports/snow.jpg)
SNOTEL Mountain snowpack snow water equivalent station data is provided by the USDA Natural Resource Conservation Service (NRCS).