Wide World of SPoRT Blog
First Hurricane-Force Low in the East Pacific
Tue, 30 Sep 2014 20:07:14
From September 20 through September 23, 2014, the Ocean Prediction Center (OPC) was monitoring the development of the season's first hurricane-force extratropical storm in the East Pacific. Models were suggesting a marginal hurricane-force wind event would unfold well west of the Pacific Northwest, near 140W longitude, north of 40N latitude. OPC is routinely using satellite [...]
NWS Albuquerque Fog Product Evaluation
The Albuquerque National Weather Service Forecast Office recently evaluated the SPoRT MODIS fog product, also known as the spectral difference, as well as the GOES low cloud base and fog depth products. The Aviation forecaster on the morning of 7 January 2009 used these products to assist in producing and modifying the terminal aerodrome forecast (TAF) for two regional airports: Farmington and Gallup. The main issue was a concern about the validity of the timing of fog at each TAF site in the model guidance for these observation sparse locations. The SPoRT products were valuable, and the Aviation forecaster said, "Seeing where the lower clouds and fog were developing through the evening in the imagery made me much more confident if lower clouds and / or fog did occur, it woud not be until 10Z or after, as remained forecasted in the 06Z TAF."
Image of the Day
(click to enlarge)
Traditional GOES imagery can sometimes be difficult to use to distinguish between clouds and snow cover on the ground due to the similarity of the albedo of these features at visible wavelengths. Using the multispectral channels from MODIS, a snow/cloud RGB composite can be made that distinguishes between clear ground, snow cover, and clouds. This image demonstrates this capability from a snow storm in the Tennessee River Valley. Here, clouds remain white, clear ground is green to aqua, and snow cover is designated by the various shades of red.
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.