National Weather Service United States Department of Commerce
Note:  While we are transitioning our web pages, products marked with an (*) link to product pages on the old system. Products on those pages are up-to-date, but links on those pages may go to old information or may be broken. Thank you for your patience!

GFS-LAMP Changes

DATE CYCLE CHANGES IMPACT
Completed: September 28, 2010
All Cycles
MDL adds Gridded LAMP guidance for temperature, dewpoint, ceiling height, and visibility forecasts and observations. For more information see Public Information Statement soliciting comments through November 30, 2010 for Experimental Gridded LAMP Products. NWS server data  
Web Graphics
Completed: February 9, 2010
All Cycles
MDL removes 18 stations from the LAMP guidance and modifies the ID call letters for 3 sites. For more information see Announcement of LAMP Station Removal and Modification. LAV Text   Bulletins
BUFR Guidance
Web Graphics
Completed: February 10, 2009
All Cycles
MDL adds a graphic depicting probabilities and thresholds to the web page. For more information see Announcement of New Web Graphic. Web Graphics
Completed: November 12, 2008
0200 UTC
0800 UTC
1400 UTC
2000 UTC
MDL adds four additional cycles to the GFS-LAMP system. For more information see TIN 08-82. Additional cycles
Completed: June 24, 2008
1600 UTC
1700 UTC
2200 UTC
2300 UTC
MDL adds four additional cycles to the GFS-LAMP system. For more information see TIN 08-44. Additional cycles
Completed: April 08, 2008
0100 UTC
0700 UTC
1300 UTC
1900 UTC
MDL adds four additional cycles to the GFS-LAMP system. For more information see TIN 08-14. Additional cycles
Completed: January 15, 2008
0200 UTC
0500 UTC
0800 UTC
1100 UTC
1400 UTC
1700 UTC
2100 UTC
2300 UTC
MDL discontinues the NGM LAMP guidance on the web page and NWS FTP server. For more information see TIN 07-94. NGM LAMP Product Removed
Completed: September 26, 2007
0400 UTC
0500 UTC
1000 UTC
1100 UTC
MDL adds four additional cycles to the GFS-LAMP system. For more information see TIN 07-48. Additional cycles
Completed: September 11, 2007
0000 UTC
0300 UTC
0600 UTC
0900 UTC
1200 UTC
1500 UTC
1800 UTC
2100 UTC
An update to the GFS-MOS (TIN 07-42) including the addition of new stations to visibility, obstruction to vision, and probability of precipitation characteristic guidance will impact certain GFS-LAMP elements. Effective 9/11/07, there will be GFS-LAMP forecast guidance at additional stations for visibility, obstruction to vision, conditional visibility, and precipitation characteristics. This will alter the GFS-LAMP BUFR Product and add lines to the GFS-LAMP Text Bulletin (LAV). Please refer to this change notice. Visibility
Obstruction to Vision
Conditional Visibility
Precipitation Characteristics
Completed: June 29, 2007
--
Updated LAMP BUFR documentation to correct an error in the description of conditional visibility categories. Please refer to this updated document (pdf). Documentation
Completed: May 23, 2007
0000 UTC
0600 UTC
1200 UTC
1800 UTC
Corrected a problem with the thunderstorm graphics for the new GFS LAMP cycles implemented 5/9/2007. There was a bug in how the guidance for some projections was being displayed. This fix required changing the thunderstorm guidance graphics page from a shtml formatted page to a php formatted page, which necessitated a change in the URL. Web Thunderstorm Graphics
Completed: May 16, 2007
All Cycles
Updated graphical Station Plots to display station guidance for Temperature, Dewpoint, and Wind Direction. Web
Completed: May 9, 2007
0000 UTC
0600 UTC
1200 UTC
1800 UTC
MDL adds four additional cycles and 69 stations to the GFS-LAMP system. For more information see TIN 07-13. Additional cycles
Additional stations
Completed: February 27, 2007
All Cycles
GFS LAMP FAQ and new station plots will be available. Web
Completed: November 27, 2006
All Cycles
MDL updates the GFS-LAMP meteogram display to group related forecast elements together for a more logical and useful display. This change is cosmetic only. Cosmetic
Completed: August 28, 2006
All Cycles
New current and verified meteograms will be available. Please refer to this change notice. Web
Completed: August 23, 2006
2100 UTC
MDL fixes to a problem with the GFS LAMP categorizations of the precipitation characteristics (drizzle, continuous, and showers) in BUFR format. Please refer to this change notice. Precipitation Characteristics
Completed: August 15, 2006
All Cycles
MDL updates the GFS-LAMP 15z summer thunderstorm equations and thresholds to correct an apparent instability problem that can occur under certain conditions. Thunderstorms
Completed: August 15, 2006
All Cycles
MDL updates the GFS-LAMP wind equations to utilize the latest observational and GFS-MOS data. Winds
Completed: August 8, 2006
All Cycles
GFS-LAMP Data available on the NWS FTP server. Please refer to this change notice. FTP server
Completed: August 3, 2006
All Cycles
MDL fixes problem with GFS-LAMP Thunderstorm Product. Please refer to this change notice. Thunderstorms
Completed: July 25, 2006
0300 UTC
0900 UTC
1500 UTC
2100 UTC
GFS-LAMP becomes operational at NCEP beginning with the 1500 UTC cycle. Operational Availability
Completed: July 20, 2006
1500 UTC
MDL adds additional cycle to the GFS-LAMP system. Please refer to this change notice. Additional Cycle
Completed: June 06, 2006
0300 UTC
MDL adds ptype for Alaskan Warm Season. Please refer to this change notice. Precipitation Type
Completed: June 05, 2006
0300 UTC
MDL adds an additional cycle to the GFS-LAMP system. Please refer to this change notice. Additional Cycle
Completed: May 08, 2006
0300 UTC 1500 UTC 2100 UTC
MDL adds GFS-LAMP Thunderstorm Guidance for these additional cycles. Please refer to this change notice. Thunderstorms - Additional Cycle
Completed: May 01, 2006
2100 UTC
MDL adds an additional cycle to the GFS-LAMP systems. Please refer to this change notice. Additional Cycle
Completed: March 15, 2006
0900 UTC
MDL adds GFS-LAMP Thunderstorm Guidance. Please refer to this change notice. Addition - Thunderstorms
Completed: January 23, 2006
0900 UTC
MDL adds GFS-LAMP Guidance. Please refer to this change notice. Initial Cycle