People and ecosystems throughout the West depend on snowmelt to replenish groundwater, waterways, and soil moisture. Snow droughts occurs when snowpack is abnormally low, relative to the time of year and location. This type of drought can have significant econoomic and ecological effects. This fact sheet, part of the Drought in the West fact sheet series, explains the two types of snow drought, gives more details about their effects, and offers additional resources.

Drought affects resources and services provided by national forests and grasslands in the Western United States. This fact sheet summarizes potential management actions to reduce negative effects of drought on major resource areas, developed through science-management workshops. It also provides additional resources to learn more about drought and drought management.

Drought affects resources and services provided by national forests and grasslands in the Eastern United States. This fact sheet summarizes potential management actions to reduce negative effects of drought on major resource areas, developed through science-management workshops. It also provides additional resources to learn more about drought and drought management.

This regular drought status update for the United States is produced using the most recent data and covers a range of outlooks, including current drought conditions, seasonal drought outlook, and severe fire potential. It is organized by Forest Service region. This update covers conditions for April 2026 through June 2026.

The Climate and Upland Loading Vulnerability Evaluation and Risk Analysis Tool (CULVERT) is an integrated scientific software platform developed for comprehensive watershed analysis and hydrologic risk assessment. This user manual provides detailed operational procedures and methodological guidance for all software modules, including watershed delineation, regional frequency analysis, rational method calculations, graphical peak discharge estimation, culvert hydraulic capacity assessment, streambank erosion vulnerability analysis, Revised Universal Soil Loss Equation (RUSLE) implementation, an...

This document describes the standards, codes, methods, and definitions for urban Forest Inventory and Analysis (FIA) field data items. It describes FIA field procedures that are consistent and uniform across urban FIA units nationwide, along with some regionally-specific variables.

This manual documents data collection procedures, codes, standards, and definitions used by the Pacific Northwest Research Station, Forest Inventory and Analysis (PNW-FIA) program in the 2026 periodic forest inventory of the Commonwealth of the Northern Mariana Islands.

This manual documents data collection procedures, codes, standards, and definitions used by the Pacific Northwest Research Station, Forest Inventory and Analysis (PNW-FIA) program in the 2026 annual forest inventory of California, Oregon, and Washington.