Wide World of SPoRT Blog
Validating Surface Observations with Nighttime Microphysics RGB
Mon, 27 Oct 2014 10:47:29
One night after a widespread dense fog event, we have been monitoring more fog formation very closely. Unlike the previous night, the visibility has not fallen quite so far, so fast at most of the airports across the Tennessee Valley; just a fewsites in typically fog-prone valleys are reporting visibility of less than 1 mile. [...]
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)
Various MODIS channels can be combined into Red/Green/Blue (RGB) composites. This compositing technique is used to enhance different features in the atmosphere with different colors. In this example, the MODIS RGB composite is optimized for dust detection. This image is centered over Oklahoma and Texas from 15 April 2011 at 1924 UTC. The dust plume easily stands out in shades of pink over west Texas and the Oklahoma panhandle. Additionally, the thin white strips oriented from northwest to southeast in central Texas are smoke plumes from wildfires.
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.