Note:  Starting January 5, 2010, the daily storm report summaries will record 1 inch and greater diameter hail, as well as severe thunderstorm wind and tornado reports. Please see this link for more information.

Updated:  The Mesoscale Analysis page has been substantially redesigned. Several additions and improvements have been added, such as image overlays, larger images, and fixed sector areas that permanently cover the entire contiguous United States. For more information, visit the Mesoscale Analysis Page, or download a MPEG4 video clip here. (5.8MB)

New:  The Storm Prediction Center is one of the initial participants in the NWS experimental email updates service. The SPC products available with email updates are: Tornado/Severe Thunderstorm Watches and Watch Status updates, Mesoscale Discussions, Day 1, 2, 3 and 4-8 Convective Outlooks, Day 1, 2 and 3-8 Fire Weather Outlooks. More info.

New:  Effective Tuesday March 23, 2010, the SPC began issuing fire weather products during the daylight hours. Click here for more details.

Note:  Public Severe Weather Outlooks for nighttime tornado potential will be issued December 1 through March 31. More information here.

Note:  Day 4-8 Convective Outlook NDFD grid became operational December 1, 2009. Click here for the Product Description Document. Click here for the Technical Implementation Notice 09-38.

Severe Weather GIS (SVRGIS) page has been updated with tornadoes (1950-2008), hail/wind (1955-2008) reports converted into shapefile (.shp) format. Visit http://www.spc.noaa.gov/gis/svrgis/ for details.