Hydrology - River, Rainfall, Snow and Ice Data

Rainfall and River Reports

• NEW Rainfall Monitoring Webpage
• River Statements and Warnings (includes previous versions, check date before use)
• MARFC   and    MARFC-HEFS
• Delaware River Basin and Delmarva
• Passaic and Raritan Basins and Coastal New Jersey
• Cocorahs Precipitation Summary
• Flood Inundation Mapper

Streamflow

• New Jersey - from USGS
• Pennsylvania - from USGS
• Maryland - from USGS
• Delaware - from USGS

HADS (alternate site for Streamflow)

• New Jersey
• Pennsylvania
• Maryland
• Delaware

Rainfall Data

• Automated Flood Warning System (AFWS) Mid-Atlantic
• Mid-Atlantic River Forecast Center (MARFC)
• Advanced Hydrologic Prediction Service (AHPS) Precipitation Analysis
• USGS NJ Rain Gauge Data
• USGS PA Rain Gauge Data
• USGS DE Rain Gauge Data
• USGS MD Rain Gauge Data
• Delaware Environmental Observing System (DEOS)
• NJ Weather and Climate (NJWxNet)
• Flood Alerts from the USGS
• Maps of flood and high flow conditions (click on state): NJ  DE  PA  MD

Snowfall Data

• Interactive Snow Information - National
• Regional Snow Analyses: Eastern Coastal
• Snow Water Equivalent Map for Middle Atlantic Area (MARFC)

Ice

• Ice Buildup on Rivers
• National Ice Center
• Satellite Imagery - MODIS 1km resolution
• Satellite Imagery - MODIS 250m resolution

Precipitation Frequency Data Server

• Precipitation Frequency

Water Temperature

• Water Temperature Map for the Middle Atlantic Region

Forecasts and Statements

• Daily River and Lake Summary
• Daily Quantitative Precipitation Forecast
• Flood Potential Statement
• U.S. Significant River Flood Outlook

Flash Flood and Headwater Guidance

• 1 Hr, 3 Hr, 6 Hr Flash Flood and Headwater Guidance

Meteorological Model Ensemble River Forecasts (MMEFS)

• Model Ensemble River Forecasts

SHEF

• Standard Hydrometeorological Exchange Format (SHEF) Manual

Drought Information

• NWS Mt. Holly, NJ Drought Information page

Miscellaneous Links

• Flood Physics Presentation
• The Nurture Nature Center - Focus on Floods
• Delaware River Basin Commission
• Susquehanna River Basin Commission
• What Exactly is a 100-Year Flood?
• Streamer Mapping Service
• AHPS Monitor