Observations

Latest observations from a Vaisala CL31 lidar ceilometer located at UMass.  The plot below shows the last three hours with the most recent observation indicated by the vertical line.  Cloud detections are indicated in black.  Precipitation appears typically in green to red.  Aerosols, in blue, are generally visible in the lowest km or so.  Refresh the page to update.  Archived images are located here.