Alamosa-Trinchera watershed
5.24 inches of rain fell on the Alamosa-Trinchera watershed in the 30 days to Nov 2, 2026, against a normal of 1.15 inches (456% of normal): much above normal, wetter than every year in the 1991–2020 normal for these dates.
HUC8 13010002, in CO, NM. About 2,539 square miles. Data through November 2, 2026.
The precipitation grid covers 69% of this watershed (the grid is cut at the New Mexico border), so the values are averages over that part only.
Recent periods
| Period | Rain (in) | Normal (in) | % of normal | Compared with 1991–2020 | Wettest day |
|---|---|---|---|---|---|
| Last 7 daysOct 27, 2026 to Nov 2, 2026 | 0.85 | 0.32 | 261% | above normalwetter than 87% of years | 0.64 inNov 2, 2026 |
| Last 30 daysOct 4, 2026 to Nov 2, 2026 | 5.24 | 1.15 | 456% | much above normalwetter than every year in the 1991–2020 normal | 1.56 inOct 23, 2026 |
| Last 90 daysAug 5, 2026 to Nov 2, 2026 | 9.79 | 4.38 | 223% | much above normalwetter than every year in the 1991–2020 normal | 1.56 inOct 23, 2026 |
| Last 6 monthsMay 7, 2026 to Nov 2, 2026 | 11.99 | 8.10 | 148% | much above normalwetter than every year in the 1991–2020 normal | 1.56 inOct 23, 2026 |
| Last yearNov 3, 2025 to Nov 2, 2026 | 15.63 | 15.01 | 104% | normalwetter than 57% of years | 1.56 inOct 23, 2026 |
Last 90 days
Show the data as a table
By month
- Rain
- Normal (1991–2020 median)
Show the data as a table
A grey bar is the month so far, compared with the 1991–2020 median of the same days.
A PRISM day is the 24 hours ending at 12:00 UTC on its date (about 5 to 6 AM Mountain), so a day's value is mostly the previous day's rain. The newest days are provisional: PRISM revises about the latest six months.
Daily values for the last 365 days (CSV)
Rivers that cross this watershed
- Alamosa River
- Culebra Creek
- La Jara Creek
- Pinos Creek
- Rock Creek
- San Francisco Creek
- Sangre de Cristo Creek
- Trinchera Creek
- Ute Creek (Rio Grande Headwaters)
- Wightman Fork
Each river's Watershed tab also shows snowpack, drought and air temperature for this watershed.
Source
PRISM Climate Group, Oregon State University, https://prism.oregonstate.edu, data accessed November 4, 2026. Averaged over the watershed by area. The normal is the average of the same dates in each year of 1991–2020.