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)
SPoRTís partners at the Spaceflight Meteorology Group (SMG) have an interesting use for MODIS Sea Surface Temperature (SST) data. The influence of the Gulf Stream Current is important especially since this warm current borders a tongue of cool water that hugs the eastern Florida shoreline. With a large gradient between the two features, the boundary is a common focal point for cloud and storm development. Depending on the synoptic airflow, storms that develop along this boundary may move ashore at Kennedy Space Center and disrupt operations. To help monitor this, SMG overlays visible satellite data (from GOES or MODIS) with the 1 km SST composite. This image is a combination of the SST composite with the corresponding 1 km MODIS visible imagery. The greens indicate warmer sea surface temperatures, while the blues are cooler. The circled region is the western boundary of the Gulf Stream current, with a developing cumulus field following this boundary.
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.