Overview Realtime Historical Map View
Flood Watch
2026-07-15T00:00:00-06:00

* WHAT...Flash flooding caused by excessive rainfall is possible with thunderstorms this afternoon and evening. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...From this afternoon through this evening. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas and near burn scars. * ADDITIONAL DETAILS... - Heavy rainfall produced by thunderstorms may lead to flash flooding. Rainfall rates in excessive of 1 inch per hour are possible under heavier thunderstorms. - Some locations that may experience flooding include... The Horse Gulch burn scar, Great Falls, Bozeman, Helena, Lewistown, Townsend, Fort Benton, White Sulphur Springs, Cascade, Big Sandy, Stanford, Lincoln, Belgrade, East Helena, Three Forks, Manhattan, Belt, Geraldine, Denton, Hobson and the Horse Gulch burn scar. - http://www.weather.gov/safety/flood

Nohrsc Boulder Mountain Historical Data

Historical Data


Date Snowpack SWE Snowfall Air Temperature
2024-01-01 14.0"
2024-01-02 14.0"
2024-01-03 14.0"
2024-01-04 14.0"
2024-01-05 14.0"
2024-01-06 13.0"
2024-01-07 13.0"
2024-01-08 14.0"
2024-01-09 15.0"
2024-01-10 17.0"
2024-01-11 16.0"
2024-01-12 18.0"
2024-01-13 19.0"
2024-01-14 19.0"
2024-01-15 19.0"
2024-01-16 20.0"
2024-01-17 20.0"
2024-01-18 22.0"
2024-01-19 24.0"
2024-01-20 24.0"
2024-01-21 24.0"
2024-01-22 24.0"
2024-01-23 28.0"
2024-01-24 28.0"
2024-01-25 27.0"
2024-01-26 26.0"
2024-01-27 26.0"
2024-01-28 26.0"
2024-01-29 25.0"
2024-01-30 25.0"
2024-01-31 25.0"
2024-02-01 24.0"
2024-02-02 24.0"
2024-02-03 24.0"
2024-02-04 26.0"
2024-02-05 30.0"
2024-02-06 30.0"
2024-02-07 30.0"
2024-02-08 33.0"
2024-02-09 33.0"
2024-02-10 33.0"
2024-02-11 33.0"
2024-02-12 32.0"
2024-02-13 33.0"
2024-02-14 37.0"
2024-02-15 37.0"
2024-02-16 35.0"
2024-02-17 37.0"
2024-02-18 36.0"
2024-02-19 36.0"
2024-02-20 35.0"
2024-02-21 35.0"
2024-02-22 35.0"
2024-02-23 34.0"
2024-02-24 34.0"
2024-02-25 34.0"
2024-02-26 35.0"
2024-02-27 41.0"
2024-02-28 41.0"
2024-02-29 40.0"
2024-03-01 41.0"
2024-03-02 42.0"
2024-03-03 43.0"
2024-03-04 46.0"
2024-03-05 44.0"
2024-03-06 45.0"
2024-03-07 44.0"
2024-03-08 43.0"
2024-03-09 43.0"
2024-03-10 42.0"
2024-03-11 42.0"
2024-03-12 42.0"
2024-03-13 42.0"
2024-03-14 41.0"
2024-03-15 42.0"
2024-03-16 42.0"
2024-03-17 41.0"
2024-03-18 41.0"
2024-03-19 41.0"
2024-03-20 40.0"
2024-03-21 39.0"
2024-03-22 41.0"
2024-03-23 41.0"
2024-03-24 42.0"
2024-03-25 42.0"
2024-03-26 43.0"
2024-03-27 46.0"
2024-03-28 45.0"
2024-03-29 48.0"
2024-03-30 47.0"
2024-03-31 47.0"
2024-04-01 47.0"
2024-04-02 45.0"
2024-04-03 44.0"
2024-04-04 42.0"
2024-04-05 41.0"
2024-04-06 43.0"
2024-04-07 47.0"
2024-04-08 50.0"
2024-04-09 50.0"
2024-04-10 48.0"
2024-04-11 50.0"
2025-01-26 40.0"
2025-01-27 39.0"
2025-01-28 38.0"
2025-01-29 37.0"
2025-01-30 37.0"
2025-01-31 36.0"
2025-02-01 38.0"
2025-02-02 42.0"
2025-02-03 42.0"
2025-02-04 44.0"
2025-02-05 43.0"
2025-02-06 42.0"
2025-02-07 46.0"
2025-02-08 45.0"
2025-02-09 45.0"
2025-02-10 44.0"
2025-02-11 44.0"
2025-02-12 44.0"
2025-02-13 43.0"
2025-02-14 45.0"
2025-02-15 46.0"
2025-02-16 47.0"
2025-02-17 51.0"
2025-02-18 52.0"
2025-02-19 51.0"
2025-02-20 50.0"
2025-02-21 49.0"
2025-02-22 48.0"
2025-02-23 48.0"
2025-02-24 50.0"
2025-02-25 51.0"
2025-02-26 51.0"
2025-02-27 50.0"
2025-02-28 49.0"
2025-03-01 49.0"
2025-03-02 48.0"
2025-03-03 48.0"
2025-03-04 49.0"
2025-03-05 49.0"
2025-03-06 49.0"
2025-03-07 50.0"
2025-03-08 49.0"
2025-03-09 49.0"
2025-03-10 48.0"
2025-03-11 48.0"
2025-03-12 47.0"
2025-03-13 48.0"
2025-03-14 47.0"
2025-03-15 50.0"
2025-03-16 52.0"
2025-03-17 54.0"
2025-03-18 55.0"
2025-03-19 56.0"
2025-03-20 57.0"
2025-03-21 55.0"
2025-03-22 57.0"
2025-03-23 57.0"
2025-03-24 57.0"
2025-03-25 55.0"
2025-03-26 53.0"
2025-03-27 52.0"
2025-03-28 52.0"
2025-03-29 54.0"
2025-03-30 58.0"
2025-03-31 58.0"
2025-04-01 67.0"
2025-04-02 67.0"
2025-04-03 65.0"
2025-04-04 64.0"
2025-04-05 63.0"
2025-04-06 62.0"
2025-04-07 60.0"
2025-04-08 60.0"
2025-04-09 60.0"
2025-04-10 59.0"
2025-04-11 57.0"
2025-04-12 56.0"
2025-04-13 57.0"
2025-04-14 56.0"
2025-04-15 55.0"
2025-04-16 54.0"
2025-04-17 58.0"
2025-04-18 57.0"
2025-04-19 55.0"
2025-04-20 55.0"
2025-04-21 56.0"
2025-04-22 56.0"
2025-04-23 55.0"
2025-04-24 55.0"
2025-04-25 54.0"
2025-04-26 52.0"
2025-04-27 52.0"
2025-04-28 51.0"
2025-04-29 50.0"
2025-04-30 49.0"
2025-05-01 48.0"
2025-05-02 46.0"
2025-05-03 44.0"
2025-05-04 42.0"
2025-05-05 52.0"
2025-05-06 49.0"
2025-05-07 45.0"
2025-05-08 42.0"
2025-05-09 39.0"
2025-05-10 36.0"
2025-05-11 35.0"
2025-05-12 33.0"
2025-05-13 35.0"
2025-05-14 47.0"
2025-05-15 46.0"
2025-05-16 43.0"
2025-05-17 39.0"
2025-05-18 39.0"
2025-05-19 37.0"
2025-05-20 36.0"
2025-05-21 35.0"
2025-05-22 34.0"
2025-05-23 33.0"
2025-05-24 32.0"
2025-05-25 29.0"
2025-05-26 26.0"
2025-05-27 24.0"
2025-05-28 21.0"
2025-05-29 17.0"
2025-05-30 13.0"
2025-05-31 4.0"
2025-06-02 0.0"
2025-06-03 0.0"
2025-06-04 0.0"
2025-06-05 0.0"
2025-06-06 0.0"
2025-06-07 0.0"
2025-06-08 0.0"
2025-06-09 0.0"
2025-06-10 0.0"
2025-06-11 0.0"
2025-06-12 0.0"
2025-06-13 0.0"
2025-06-14 0.0"
2025-06-15 0.0"
2025-06-16 0.0"
2025-06-17 0.0"
2025-06-18 0.0"
2025-06-19 0.0"
2025-06-20 0.0"
2025-06-21 0.0"
2025-06-22 0.0"
2025-06-23 0.0"
2025-06-24 0.0"
2025-06-25 0.0"
2025-06-26 0.0"
2025-06-27 0.0"
2025-06-28 0.0"
2025-07-02 0.0"
2025-07-05 0.0"
2025-07-06 0.0"
2025-07-11 1.0"
2025-07-14 0.0"
2025-07-16 0.0"
2025-07-17 0.0"
2025-07-22 0.0"
2025-07-23 1.0"
2025-07-25 0.0"
2025-08-05 0.0"
2025-08-08 0.0"
2025-08-09 0.0"
2025-08-10 0.0"
2025-08-12 0.0"
2025-08-14 0.0"
2025-08-22 0.0"
2025-08-23 0.0"
2025-08-28 0.0"
2025-08-29 0.0"
2025-08-30 0.0"
2025-08-31 0.0"
2025-09-02 0.0"
2025-09-05 0.0"
2025-09-06 0.0"
2025-09-07 0.0"
2025-09-08 0.0"
2025-09-09 0.0"
2025-09-10 0.0"
2025-09-11 0.0"
2025-09-12 0.0"
2025-09-13 0.0"
2025-09-14 1.0"
2025-09-15 0.0"
2025-09-16 0.0"
2025-09-17 0.0"
2025-09-18 1.0"
2025-09-19 0.0"
2025-09-20 0.0"
2025-09-21 1.0"
2025-09-22 1.0"
2025-09-23 0.0"
2025-09-24 1.0"
2025-09-25 1.0"
2025-09-26 1.0"
2025-09-27 0.0"
2025-09-28 0.0"
2025-09-29 0.0"
2025-09-30 1.0"
2025-10-01 0.0"
2025-10-02 0.0"
2025-10-03 0.0"
2025-10-04 1.0"
2025-10-05 6.0"
2025-10-06 5.0"
2025-10-07 4.0"
2025-10-08 3.0"
2025-10-09 1.0"
2025-10-10 1.0"
2025-10-11 0.0"
2025-10-12 1.0"
2025-10-13 8.0"
2025-10-14 7.0"
2025-10-15 5.0"
2025-10-16 4.0"
2025-10-17 4.0"
2025-10-18 5.0"
2025-10-19 7.0"
2025-10-20 9.0"
2025-10-21 8.0"
2025-10-22 8.0"
2025-10-23 8.0"
2025-10-24 7.0"
2025-10-25 6.0"
2025-10-26 7.0"
2025-10-27 8.0"
2025-10-28 7.0"
2025-10-29 7.0"
2025-10-30 7.0"
2025-10-31 7.0"
2025-11-01 7.0"
2025-11-02 6.0"
2025-11-03 6.0"
2025-11-04 7.0"
2025-11-05 7.0"
2025-11-06 7.0"
2025-11-07 8.0"
2025-11-08 8.0"
2025-11-09 8.0"
2025-11-10 8.0"
2025-11-11 7.0"
2025-11-12 8.0"
2025-11-13 7.0"
2025-11-14 7.0"
2025-11-15 8.0"
2025-11-16 7.0"
2025-11-17 7.0"
2025-11-18 7.0"
2025-11-19 6.0"
2025-11-20 7.0"
2025-11-21 7.0"
2025-11-22 7.0"
2025-11-23 7.0"
2025-11-24 13.0"
2025-11-25 13.0"
2025-11-26 15.0"
2025-11-27 14.0"
2025-11-28 19.0"
2025-11-29 17.0"
2025-11-30 16.0"
2025-12-01 16.0"
2025-12-02 17.0"
2025-12-03 17.0"
2025-12-04 19.0"
2025-12-05 18.0"
2025-12-06 24.0"
2025-12-07 24.0"
2025-12-08 26.0"
2025-12-09 25.0"
2025-12-10 26.0"
2025-12-11 25.0"
2025-12-12 28.0"
2025-12-13 27.0"
2025-12-14 27.0"
2025-12-15 26.0"
2025-12-16 26.0"
2025-12-17 28.0"
2025-12-18 28.0"
2025-12-19 33.0"
2025-12-20 32.0"
2025-12-21 32.0"
2025-12-22 33.0"
2025-12-23 33.0"
2025-12-24 32.0"
2025-12-25 32.0"
2025-12-26 32.0"
2025-12-27 34.0"
2025-12-28 33.0"
2025-12-29 33.0"
2025-12-30 33.0"
2025-12-31 32.0"
2026-01-01 32.0"
2026-01-02 32.0"
2026-01-03 32.0"
2026-01-04 34.0"
2026-01-05 33.0"
2026-01-06 36.0"
2026-01-07 38.0"
2026-01-08 37.0"
2026-01-09 37.0"
2026-01-10 36.0"
2026-01-11 36.0"
2026-01-12 35.0"
2026-01-13 35.0"
2026-01-14 35.0"
2026-01-15 35.0"
2026-01-16 34.0"
2026-01-17 34.0"
2026-01-18 34.0"
2026-01-19 34.0"
2026-01-20 35.0"
2026-01-21 35.0"
2026-01-22 35.0"
2026-01-23 35.0"
2026-01-24 35.0"
2026-01-25 36.0"
2026-01-26 36.0"
2026-01-27 36.0"
2026-01-28 36.0"
2026-01-29 36.0"
2026-01-30 36.0"
2026-01-31 36.0"
2026-02-01 36.0"
2026-02-02 36.0"
2026-02-03 36.0"
2026-02-04 35.0"
2026-02-05 35.0"
2026-02-06 35.0"
2026-02-07 35.0"
2026-02-08 35.0"
2026-02-09 42.0"
2026-02-10 41.0"
2026-02-11 40.0"
2026-02-12 40.0"
2026-02-13 40.0"
2026-02-14 40.0"
2026-02-15 39.0"
2026-02-16 40.0"
2026-02-17 42.0"
2026-02-18 42.0"
2026-02-19 42.0"
2026-02-20 43.0"
2026-02-21 43.0"
2026-02-22 42.0"
2026-02-23 42.0"
2026-02-24 42.0"
2026-02-25 44.0"
2026-02-26 44.0"
2026-02-27 43.0"
2026-02-28 43.0"
2026-03-01 43.0"
2026-03-02 43.0"
2026-03-03 42.0"
2026-03-04 42.0"
2026-03-05 47.0"
2026-03-06 52.0"
2026-03-07 51.0"
2026-03-08 50.0"
2026-03-09 50.0"
2026-03-10 49.0"
2026-03-11 49.0"
2026-03-12 48.0"
2026-03-13 54.0"
2026-03-14 59.0"
2026-03-15 58.0"
2026-03-16 58.0"
2026-03-17 57.0"
2026-03-18 56.0"
2026-03-19 54.0"
2026-03-20 53.0"
2026-03-21 52.0"
2026-03-22 51.0"
2026-03-23 51.0"
2026-03-24 50.0"
2026-03-25 49.0"
2026-03-26 49.0"
2026-03-27 48.0"
2026-03-28 48.0"
2026-03-29 48.0"
2026-03-30 49.0"
2026-03-31 48.0"
2026-04-01 48.0"
2026-04-02 56.0"
2026-04-03 55.0"
2026-04-04 54.0"
2026-04-05 52.0"
2026-04-06 50.0"
2026-04-07 50.0"
2026-04-08 49.0"
2026-04-09 49.0"
2026-04-10 48.0"
2026-04-11 47.0"
2026-04-12 48.0"
2026-04-13 49.0"
2026-04-14 48.0"
2026-04-15 48.0"
2026-04-16 49.0"
2026-04-17 51.0"
2026-04-18 50.0"
2026-04-19 48.0"
2026-04-20 47.0"
2026-04-21 46.0"
2026-04-22 44.0"
2026-04-23 52.0"
2026-04-24 51.0"
2026-04-25 52.0"
2026-04-26 51.0"
2026-04-27 50.0"
2026-04-28 50.0"
2026-04-29 49.0"
2026-04-30 47.0"
2026-05-01 45.0"
2026-05-02 44.0"
2026-05-03 42.0"
2026-05-04 42.0"
2026-05-05 42.0"
2026-05-06 40.0"
2026-05-07 38.0"
2026-05-08 37.0"
2026-05-09 35.0"
2026-05-10 33.0"
2026-05-11 30.0"
2026-05-12 28.0"
2026-05-13 27.0"
2026-05-14 25.0"
2026-05-15 23.0"
2026-05-16 22.0"
2026-05-17 20.0"
2026-05-18 17.0"
2026-05-19 22.0"
2026-05-20 22.0"
2026-05-21 24.0"
2026-05-22 22.0"
2026-05-23 21.0"
2026-05-24 18.0"
2026-05-25 14.0"
2026-05-26 1.0"
2026-05-27 0.0"
2026-05-28 0.0"
2026-05-29 0.0"
2026-05-30 0.0"
2026-05-31 0.0"
2026-06-01 0.0"
2026-06-02 0.0"
2026-06-03 0.0"
2026-06-04 0.0"
2026-06-05 0.0"
2026-06-06 0.0"
2026-06-07 0.0"
2026-06-08 0.0"
2026-06-09 0.0"
2026-06-10 0.0"
2026-06-11 0.0"
2026-06-12 1.0"
2026-06-13 0.0"
2026-06-14 0.0"
2026-06-15 0.0"
2026-06-16 0.0"
2026-06-17 0.0"
2026-06-18 0.0"
2026-06-19 0.0"
2026-06-20 0.0"
2026-06-21 0.0"
2026-06-22 0.0"
2026-06-23 0.0"
2026-06-24 0.0"
2026-06-25 0.0"
2026-06-26 0.0"
2026-06-27 0.0"
2026-06-28 0.0"
2026-06-29 2.0"
2026-06-30 0.0"
2026-07-01 0.0"
2026-07-02 0.0"
2026-07-03 0.0"
2026-07-04 0.0"
2026-07-05 0.0"
2026-07-06 0.0"
2026-07-07 0.0"
2026-07-08 0.0"
2026-07-09 0.0"
2026-07-10 0.0"
2026-07-11 0.0"
2026-07-12 0.0"
2026-07-13 0.0"

Snowfall Calendar


Date Average 2026 2025 2024
01-01 0
01-02 0
01-03 0
01-04 0
01-05 0
01-06 0
01-07 0
01-08 2.0
01-09 1.0
01-10 2.0
01-11 1.0
01-12 1.0
01-13 1.0
01-14 1.0
01-15 1.0
01-16 0
01-17 0
01-18 0
01-19 0
01-20 0
01-21 0
01-22 0
01-23 0
01-24 0
01-25 0
01-26 0
01-27 3.0
01-28 2.0
01-29 0
01-30 1.0
01-31 0
02-01 0
02-02 0
02-03 1.0
02-04 1.0
02-05 1.0
02-06 0
02-07 0
02-08 2.0
02-09 1.0
02-10 2.0
02-11 1.0
02-12 0
02-13 0
02-14 0
02-15 0
02-16 0
02-17 0
02-18 2.0
02-19 3.0
02-20 2.0
02-21 1.0
02-22 1.0
02-23 0
02-24 0
02-25 0
02-26 1.5
02-27 1.5
02-28 2.0
03-01 1.0
03-02 1.0
03-03 0
03-04 0
03-05 0
03-06 3.0
03-07 1.5
03-08 1.5
03-09 1.0
03-10 1.0
03-11 0
03-12 0
03-13 0
03-14 0
03-15 2.0
03-16 3.0
03-17 4.0
03-18 4.0
03-19 2.5
03-20 3.0
03-21 2.0
03-22 2.0
03-23 2.5
03-24 3.0
03-25 3.0
03-26 0
03-27 1.0
03-28 0
03-29 0
03-30 0
03-31 0
04-01 0
04-02 3.0
04-03 4.0
04-04 4.5
04-05 4.0
04-06 2.0
04-07 1.0
04-08 1.5
04-09 2.0
04-10 3.0
04-11 0
04-12 1.0
04-13 1.5
04-14 3.0
04-15 0
04-16 0
04-17 2.0
04-18 3.5
04-19 2.5
04-20 1.0
04-21 0
04-22 1.0
04-23 2.0
04-24 1.5
04-25 2.5
04-26 2.5
04-27 3.0
04-28 3.0
04-29 4.0
04-30 4.0
05-01 5.0
05-02 5.0
05-03 2.0
05-04 2.0
05-05 4.0
05-06 8.0
05-07 7.5
05-08 6.5
05-09 7.0
05-10 6.0
05-11 0
05-12 0
05-13 0
05-14 0
05-15 8.0
05-16 0
05-17 3.0
05-18 3.0
05-19 4.0
05-20 3.0
05-21 3.0
05-22 3.0
05-23 6.0
05-24 7.0
05-25 9.0
05-26 10.0
05-27 11.0
05-28 11.0
05-29 17.0
05-30 11.0
05-31 0
06-01 0
06-02 0
06-03 0
06-04 0
06-05 0
06-06 0
06-07 0
06-08 0
06-09 0
06-10 0
06-11 0
06-12 0
06-13 0
06-14 0
06-15 0
06-16 0
06-17 0
06-18 0
06-19 0
06-20 0
06-21 0
06-22 0
06-23 0
06-24 0
06-25 0
06-26 0
06-27 0
06-28 0
06-29 0
07-02 0
07-05 0
07-06 0
07-11 0
07-14 0
07-16 0
07-17 0
07-22 0
07-23 0
07-25 0
08-05 0
08-08 0
08-09 0
08-10 0
08-12 0
08-14 0
08-22 0
08-23 0
08-28 0
08-29 0
08-30 0
08-31 0
09-02 0
09-05 0
09-06 0
09-07 0
09-08 0
09-09 0
09-10 0
09-11 0
09-12 0
09-13 0
09-14 0
09-15 0
09-16 0
09-17 0
09-18 0
09-19 0
09-20 0
09-21 0
09-22 0
09-23 0
09-24 0
09-25 0
09-26 0
09-27 0
09-28 0
09-29 0
09-30 0
10-01 0
10-02 0
10-03 0
10-04 0
10-05 0
10-06 3.0
10-07 4.0
10-08 0
10-09 0
10-10 0
10-11 0
10-12 0
10-13 0
10-14 4.0
10-15 1.0
10-16 0
10-17 0
10-18 0
10-19 0
10-20 0
10-21 2.0
10-22 2.0
10-23 2.0
10-24 0
10-25 0
10-26 0
10-27 0
10-28 1.0
10-29 0
10-30 0
10-31 0
11-01 1.0
11-02 0
11-03 0
11-04 0
11-05 0
11-06 0
11-07 0
11-08 0
11-09 0
11-10 1.0
11-11 1.0
11-12 0
11-13 0
11-14 0
11-15 1.0
11-16 1.0
11-17 0
11-18 0
11-19 0
11-20 0
11-21 0
11-22 0
11-23 0
11-24 0
11-25 0
11-26 0
11-27 0
11-28 0
11-29 2.0
11-30 0
12-01 0
12-02 0
12-03 0
12-04 0
12-05 0
12-06 0
12-07 0
12-08 1.0
12-09 0
12-10 0
12-11 0
12-12 0
12-13 2.0
12-14 1.0
12-15 0
12-16 0
12-17 0
12-18 0
12-19 0
12-20 0
12-21 0
12-22 1.0
12-23 1.0
12-24 1.0
12-25 0
12-26 0
12-27 0
12-28 1.0
12-29 1.0
12-30 1.0
12-31 0

Annual Peak Snowpack


Seasonal Comparison


Oceanic Nino Index