Observation Analysis
  xx   mm/dd/yyyy  
Analysis Display

The above images are analyses of surface weather information across western and central Wyoming as well as surrounding areas. Observations are brought in to the NWS office in Riverton where they are quality controlled four times a day by the HMT staff. An hourly program nudges the point observations to a 2.5 km grid over the area using the "serp" technique, which is an algorithm designed to create a gridded analysis using the observations, a first guess field (usually from either model output or the previous hour), as well as elevation information. Nudging of the point observations is adjusted both horizontally and vertically. Point observations come from a variety of sources, including ASOS, AWOS, RAWS, SNOTEL, WYDOT, CWOP, BT Avalanche Center, etc.

The QPE (Quantitative Precipitation Estimate) images are created from the Multisensor Precipitation Estimate (MPE) database created at NWS Riverton. These analyses are purely automated at this point, with no manual quality control. Look for improvements in the coming months.

If you have any questions regarding these analyses, please contact Brett McDonald, Science and Operations Officer.

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.