Wide World of SPoRT Blog
More Fog...This Time the Nighttime Microphysics RGB is the Better Product
Fri, 17 Oct 2014 21:44:48
So, with the moon now passing into the waning crescent phase, the Day-Night Band imagery is less operationally useful, at least for the detection of fog and other lower level cloud types. That is, at least untilthe moonisbackinto the waxing gibbous phase. Nevertheless, when cirrus clouds aren't present, the Nighttime Microphysics RGB has proven to [...]
WRF Model using Cloud Computing Captures Central America "Tehuantepecer" Event
The Tehuantepecer is a strong mountain-gap wind traveling through Chivela Pass in eastern Mexico typically occurring in the late Autumn and Winter months. Tehuantepecers originate when post-coldfrontal northerly winds over the western Gulf of Mexico advance equatorward as a strong high pressure system moves into the U.S. Southern Plains. The gradient wind accelerates southward by cold air damming and blows through the gap in the Sierra Madre Mountains. Wind speeds can reach up to hurricane force in extreme scenarios in the Gulf of Tehuantepec. A Tehuantepecer event was accurately forecasted by the Weather Research and Forecasting (WRF) model runs over Central America in which peak winds exceeded 25 m/s.
Image of the Day
(click to enlarge)
The 1 km Spectral Difference is a MODIS product provided to SPoRT's National Weather Service partners. This tool provides forecasters with a snapshot of where fog may be located. The grey indicates clear skies, blue as cirrus clouds, and the yellow indicates fog.
Product Status Page
Though we're not 24/7, SPoRT strives to provide the most timely and reliable data products to its partners and end users. A system has been developed to monitor the availability of LDM and FTP products and categorize each product based on its age. Summaries are posted every 10 minutes to the link below.