Cooperative Institute for Mesoscale Meteorological Studies





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CIMMS Review, July 28-29, 2015

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CIMMS Annual Report 2014

Executive Summary Listing of Activities during FY2014 plus a link to the full report.

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CIMMS, a NOAA/OU Cooperative Institute

The Cooperative Institute for Mesoscale Meteorological Studies is a research organization created in 1978 by a cooperative agreement between the University of Oklahoma and the National Oceanic and Atmospheric Administration. CIMMS promotes collaborative research between NOAA and OU scientists on problems of mutual interest to improve basic understanding of mesoscale meteorological phenomena, weather radar, and regional climate to help produce better forecasts and warnings that save lives and property. CIMMS research contributes to the NOAA mission through improvement of the observation, analysis, understanding, and prediction of weather elements and systems and climate anomalies ranging in size from cloud nuclei to multi-state areas.


Warn On Forecast Project

The National Weather Service is making increasing use of numerical weather prediction models in forecasting severe weather. The Warn-on-Forecast project aims to develop sophisticated, real-time modeling systems that forecasters will use to improve warnings of tornadoes, damaging wind and hail, and flash floods. One major focus of Warn-on-Forecast scientists at CIMMS/NSSL is exploring how the accuracy of model forecasts of severe weather increases as model resolution improves (see figure below). These efforts will help guide the design of Warn-on-Forecast modeling systems in light of current limitations on computing power.

90-min forecasts of rainfall in idealized simulations run at different grid spacings (model resolutions). In this case, using grid spacings > 2 km severely worsens the forecasts.