X-band Radar Data
These images show low-elevation scans from the NOAA/ETL X-band weather
research radar, which is stationed on the coastline at Fort Ross, California,
to observe land-falling winter storms for HMT 2004.
The reflectivities of precipitation echoes
in the region extending to 58 km offshore are shown in high resolution with
color contours in dBZ units, where warmer colors indicate more intense rain.
The range ring interval is 10 km. A few landmarks are indicated by
three-letter identifier codes, including Point Arena (PTA) to the northwest,
Point Reyes (PTR) to the southeast and the Bodega buoy (BBB) offshore to the
south-southwest. Date and time are shown in the lower right corner in terms
of Universal Coordinated Time (subtract 8 hours for Pacific Standard Time).
The radar also measures the Doppler velocity and polarimetric
features of the precipitation, although those parameters are not displayed
here. Images from earlier periods and dates can be viewed from the
image archive. An interesting case from
December 9, 2003
shows the narrow cold frontal rainband (NCFR) coming on shore during the storm that affected the northern SF bay area.