Accession Number : ADA300074

Title :   Evaluation of the Mesoscale Eta Model Over the Western United States.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Swanson, Robert T., Jr

PDF Url : ADA300074

Report Date : 10 SEP 1995

Pagination or Media Count : 122

Abstract : The skill of the Mesoscale Eta Model is evaluated over a 6-month period from October 1, 1994 to March 31, 1995 over the western United States. This model will continue to undergo changes until and after its projected operational release in July 1995. Many diagnostics and error statistics are created to evaluate its performance as forecasts are received and archived at the University of Utah. These statistics are available on the Internet allowing researchers and operational forecasters access to them in near real-time. The Mesoscale Eta Model forecast initialized at 1200 UTC, 9 November 1994 is used as a case study to introduce many of the diagnostics developed to evaluate the model. A systematic evaluation of the average and root-mean-squared error over months and seasons reveals little significant bias in upper tropospheric fields such as 300 mb wind or 500 mb geopotential height. Moderate average errors are evident in lower tropospheric temperature. Accumulated precipitation over months and seasons indicates the model's spinup of precipitation during the first 12 hours of the forecast cycle. (MM)

Descriptors :   *COMPUTER PROGRAMS, *METEOROLOGICAL DATA, *WEATHER FORECASTING, UNITED STATES, COASTAL REGIONS, WIND, ATMOSPHERIC TEMPERATURE, THESES, ATMOSPHERIC MOTION, VORTICES, TOPOGRAPHY, METEOROLOGICAL SATELLITES, CASE STUDIES, WIND DIRECTION, RADIOSONDES, ATMOSPHERIC PRECIPITATION, BAROMETRIC PRESSURE, WEST(DIRECTION), TROPOSPHERE, SEA LEVEL, HUMIDITY, ATMOSPHERIC SOUNDING, GEOPOTENTIAL.

Subject Categories : Meteorology
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE