National Weather Service United States Department of Commerce




NERFC Hydromet Outlook Page

Supporting Gulf of Maine Harmful Algal Bloom (HAB) Monitoring & Forecasting

This hydromet outlook page has been developed to support seasonal Harmful Algal Bloom (HAB) Monitoring and Forecasting Activities in the Gulf Of Maine. Weekly 2-week Outlooks are provided by NERFC from mid-March to early June in support of these activities.


30 Day Precipitation Departures

60 Day Precipitation Departures

90 Day Precipitation Departures




NERFC Observed Snow Depth


NOHRSC Modeled Snow Water




Current Streamflow Forecasts

Current Streamflow Departures

Short-range Ensemble River Forecasts



Graphical Forecasts for the Northeast

Short Range Forecasts (0.5 - 2.5 days)

Medium Range Forecasts (3 - 7 days)

CPC 6-10 Day Precipitation

CPC 8-14 Day Precipitation

CPC Experimental Week 3-4 Precipitation

NERFC Seasonal Spring Flood Outlook

90 Day Streamflow Forecasts

NCEP Model Guidance