Atmospheric River Portal. Access information, images, analyses, diagnostics of current conditions, forecasts, and projects related to atmospheric rivers (ARs). More on ARs...

The graphics below are designed to forecast the presence and strength of Atmospheric Rivers using data from the NCEP Global Forecast System (GFS), North American Mesoscale Forecast System (NAM), and Global Ensemble Forecast System (GEFS) models.

Assets from this observational network leveraged by AQPI include: Atmospheric River Observatories, soil moisture, surface meteorology, wind profilers, and snow level radars. AQPI also includes new observations and forecast modeling to improve monitoring and prediction of precipitation, streamflow, and coastal inundation in the San Francisco Bay ...

Automated Atmospheric River Detection From NOAA/ESRL/PSL The following shows the Automated Atmospheric River detection technique designed and run by NOAA/ESRL/PSL applied to SSMIS water vapor imagery.

The award-winning display from this tool allows forecasters to monitor the atmospheric forcings associated with ARs and to evaluate the performance of a weather forecast model's prediction of those forcings.

Improved understanding of ARs and their importance has come from more than a decade of scientific studies using new satellite, radar, aircraft & other observations & major weather model improvements.

The plots linked below compare precipitation observations from a vertically-pointing radar with similar observations from the closest WSR-88D scanning radar operated by the National Weather Service.

This page contains 1, 3, 5, and 7-day Quantitative Precipitation Forecasts (QPF). The products are produced by Dr. Jason Cordeira of Plymouth State University as a cooperative effort with CW3E using the NOAA/NCEP Weather Prediction Center and the NOAA/NCEP Global Forecast System (GFS) Model. The WPC QPF data are plotted on a ~5 km grid and the ...

An automated technique has been developed to objectively identify and characterize atmospheric river events in the fields of integrated water vapor (IWV) content and integrated water vapor transport (IVT).

Wind profilers are Doppler radars that most often operate in the VHF (30-300 MHz) or UHF (300-1000 MHz) frequency bands. There are three primary types of radar wind profilers in operation in the U.S. today. The NOAA Profiler Network (NPN) profiler operates at a frequency of 404 MHz (Table 1, Fig. 1a). The second type of profiler that is used by ...