Assessment :: Nighttime Microphysics and DNB Imagery: Fog vs Low Clouds in Eastern & Southern CONUS

(December 2013 – January 2014)
Description: This report describes the 2013/14 assessment of multi-spectral imagery produced by the NASA Short-term Predication, Research, and Transition (SPoRT) Program from the MODIS and VIIRS polar-orbiting instruments for application by its Weather Forecast Office (WFO) collaborators within the NWS Southern and Eastern Regions.  GOES 11-3.9μ difference imagery has traditionally been used to analyze and track low clouds and fog at night to support the preparation and amendment of TAFs. The DNB and Nighttime Microphysics (NtMicro) RGB products provide additional information within a single image to increase the forecaster’s awareness of cloud characteristics that apply to aviation hazards. In particular, the NtMicro RGB contains additional channels in order to help differentiate low clouds from fog which is not readily apparent using the traditional 11-3.9μ imagery.

Full title: VIIRS and MODIS Multi-Spectral Imagery Assessment for Aviation Weather and Cloud Analysis – 2013-14, Fall / Winter

Product(s): Nighttime Microphysics RGB, VIIRS Day Night Band, SPoRT 11-3.9 micron difference hybrid imagery

Date: December 2013 – January 2014

Region: East, Southeast, Southwest

Need(s) Addressed: Analysis of  clouds to support short-term aviation forecasts.  Particularly, to assess value of products to differentiate fog from low clouds


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