Wide World of SPoRT Blog
LMA Flash Extent Density Data Used for Warning Decision
Thu, 18 June 2015
The Huntsville office has a long history of using total lightning information from the North Alabama Lightning Mapping Array (NALMA) for warning decision-making. Since 2003, WFO Huntsville has been ingesting and receiving a source density product from NASA SPoRT. However, recently, we decided to begin migrating to Flash Extent Density (FED) data; this is more consistent with the Geostationary Lightning Mapper, more consistent with recent operational research, and easier to convey and understand. Typically we are trying to apply the "two-sigma" lightning jump algorithm suggested by Schultz et al. (2009, 2012).
A modeling and verification study of summer precipitation systems using NASA surface initialization datasets
One of the most challenging weather forecast problems in the southeastern U.S. is daily summertime pulse-type convection. During the summer, atmospheric flow and forcing are generally weak in this region; thus, convection typically initiates in response to local forcing along sea/lake breezes, and other discontinuities often related to horizontal gradients in surface heating rates. Numerical simulations of pulse convection usually have low skill, even in local predictions at high resolution, due to the inherent chaotic nature of these precipitation systems.
Image of the Day
(click to enlarge)
This image shows the MODIS nighttime microphysics red-green-blue (RGB) composite at 0724 UTC on 17 October 2014. The RGB imagery are used to combine multiple channels into one image for use by forecasters. The nighttime microphysics RGB is a valuable tool for the detection of fog and other low-level clouds. This image shows the fog (whitish-aqua) colors lying across the valley areas of northeastern Alabama and adjacent areas of southern Tennessee and northwest Georgia.
Ingest and Product Status Pages
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 health of our real-time data ingest and availability of LDM and FTP products. Summaries are posted every 10 minutes to the links below.