Work underway at the University of Alabama in Huntsville (UAH) and the University of Wisconsin Cooperative Institute of Meteorological Satellite Studies (UW-CIMSS) is towards enhancing our GOES-based CI processing with lightning information, as well as with data from the MODerate resolution Infrared Spectrometer (MODIS). Improved means of correlating VIS and up to 20 IR fields from GOES and MODIS with rainfall (i.e. radar reflectivities greater than 25) are being developed. Specific aspects of satellite-based CI research include: a) correlating radar echoes, satellite IR and total lightning flash rate data, as a way of predicting convective cloud properties (e.g., updrafts) and growth, b) determining the relative importance of the various IR signals to the first occurrence of a 25-30 dBZ radar echo (e.g., the time trends in 6.7-10.7 um Tb differences for moving clouds), and c) developing a means to forecast lightning flash rates and trends as related to changing satellite IR information. Developing the IR-based processing toward nighttime CI nowcasting, when VIS data are unavailable, is another long-term goal of this work. The procedures that allow for the validation of our techniques are engrained in our data processing.
This project's goals coincide with those of the FAA Aviation Weather Research Program (AWRP) efforts at the National Center for Atmospheric Research (NCAR) to nowcast CI for the purpose of enhancing aviation safety over land and oceanic regions. As proven techniques are developed, they will be transferred into the forecast systems supported by the FAA for nowcasting convection.
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