Accession Number : ADA137165

Title :   The Use of Interactive Graphics Processing in Short-Range Terminal Weather Forecasting: An Initial Assessment.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

Personal Author(s) : Chisholm,D A ; Jackson,A J ; Niedzielski,M E ; Schechter,R ; Ivaldi,C F

PDF Url : ADA137165

Report Date : 31 Mar 1983

Pagination or Media Count : 179

Abstract : The products judged most useful in preparing short-range terminal forecasts included (1) a station model time series display, (2) conventional geographic data displays presented simultaneously as four quadrant panels guidance on one screen, (3) mesoscale surface objective analyses, and (4) a forecast guidance prodecure based on 2-D upper-air trajectories and sensible weather algorithms based on imagery from the GOES satellite. The importance of half-hourly visible and IR imagery from the GOES satellite in short-range terminal forecasting was confirmed in this experiment. The participating forecasters relied more heavily on it to prepare their forecasts than any other source. The manipulation of digital imagery in a computer-based interactive graphic system through time-series looping, color enhancements, and overlaying conventional plots and analyses on it, provides a wealth of qualitative and quantitative guidance for forecasting. The numerical forecasts yielded superior rms errors compared to persistence at all forecast intervals except 1 h. At 4 h, the improvement over persistence ranged from about 21 percent for wind forecasts to about 34 percent for total cloud amount, while the 6-h quantitative precipitation forecasts yielded a 39 percent improvement.

Descriptors :   *WEATHER FORECASTING, METEOROLOGICAL DATA, DATA PROCESSING, DISPLAY SYSTEMS, INTERACTIVE GRAPHICS, STATISTICAL ANALYSIS, FRONTS(METEOROLOGY), CYCLONES

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE