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Experimental MOS Weather Grid Changes


2014
DATE CYCLE CHANGES
December 12, 2014
1200 UTC
Added weather grid verification preprint from 39th National Weather Association Annual Meeting to the Publications page.
April 8, 2014
1200 UTC
GMOS Weather, precipitation type probability, PPI, and PoPO added to the experimental GMOS guidance over the CONUS and Alaska. See Technical Implementation Notice 13-49.


2013
DATE CYCLE CHANGES
November 5, 2013
1200 UTC
Updated Alaska weather example page with a case of more active weather. Added link to survey for comments on GFS GMOS Precipitation Type and Predominant weather to several pages.
November 4, 2013
1200 UTC
Added PPI GRIB2 files to GRIB2 download area on the GMOS weather grid homepage. Added links in sidebar and on FAQ page to the CONUS unconditional severe thunderstorm probabilities.
July 25, 2013
0000 UTC
Began populating webpages with data and images created on the Weather and Climate Operational Supercomputer System (WCOSS).


2012
DATE CYCLE CHANGES
November 16, 2012
1200 UTC
Added MOS weather grid preprint from 37th National Weather Association Annual Meeting to the Publications page.
September 10, 2012
1200 UTC
Added comparisons of freezing, frozen, liquid, and thunder components of the GMOS and NDFD weather grids to the Alaska GMOS/NDFD Comparison page.
August 31, 2012
1200 UTC
Split GRIB2 files into short-range and extended range. These are available in the GRIB2 download area on the weather grid homepage.
August 13, 2012
1200 UTC
Improvements to unconditional probability of severe thunderstorms have been made to improve coverage over the Great Lakes.
July 13, 2012
1200 UTC
Removed links to December 2010 2.5 km CONUS (Winter Example) sample case. Updated links to 2.5 km CONUS Weather Example (formerly Severe Example) page. Added graphics to display GMOS-NDFD comparisons of freezing, frozen, liquid, and thunderstorm categories to the 2.5 km CONUS Weather Example page.
July 13, 2012
1200 UTC
Updated the Frequently Asked Questions Page to include links to images of GMOS elements.
June 22, 2012
1200 UTC
Updated the Frequently Asked Questions Page to include availability information of GMOS elements.
June 20, 2012
1200 UTC
Conditional precipitation type equations updated to produce missing forecasts in summer (2.5 km CONUS: June 1-August 31, Alaska: June 16-August 31).
June 14, 2012
0000 UTC
Added Alaska GMOS Weather Evalutation Page, which updates daily at 00Z and shows the GMOS forecasts and observations for the previous day.
June 10, 2012
0000 UTC
Added links to download GRIB2 files for Alaska to index.php.
May 10, 2012
1200 UTC
Alaska Weather Example page established.
May 2, 2012
1200 UTC
Improved probability of 2.5 km CONUS thunderstorm guidance so that Thunder Potential Index and Severe Potential Index now have the same extent as other elements.
May 2, 2012
1200 UTC
Alaska GMOS Weather page and GMOS/NDFD Alaska Comparison page established.
February 29, 2012
1200 UTC
The GMOS/NDFD Comparison page now compares 00Z GMOS to 00Z NDFD and 12Z GMOS to 12Z NDFD.
January 12, 2012
1200 UTC
Added comparisons of freezing, frozen, liquid, thunder, and severe components of the weather grid to the GMOS/NDFD Comparison page.


2011
DATE CYCLE CHANGES
December 30, 2011
1200 UTC
Removed reliance on precipitation type best category thresholds from precipitation phase assignment.
December 16, 2011
1200 UTC
Adjusted smoother settings for precipitation potential, thunder potential, and severe potential to smooth less.
December 14, 2011
0000 UTC
Started using HRMOS PoP/QPF as an input for the weather grid. A before/after comparison of the 00z forecast for December 14 is available here.
October 2011
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Added 2.5 km CONUS GMOS Weather Evalutation Page, which updates daily at 00Z and shows the GMOS forecasts and observations for the previous day.
September 26, 2011
1200 UTC
Adjusted method for assigning order of weather type subkeys.
September 23, 2011
0000 UTC
Added Precipitation Potential Index (PPI) comparison to GMOS/NDFD Comparison page.
September 19, 2011
1200 UTC
Improved method for determining precipitation type potential indices.
August 26, 2011
1200 UTC
Severe Weather Example page established. Added graphics to display precipitation intensity to gmos_wx.php.
August 25, 2011
1200 UTC
Replaced display of freezing, frozen, and liquid categories with freezing, frozen, and liquid potential indices.
August 15, 2011
1200 UTC
Added GMOS-NDFD comparison to Winter Weather Example page.
August 5, 2011
1200 UTC
Winter Weather Example page established.
July 18, 2011
1200 UTC
Added graphics to display precipitation potential index; freezing, frozen, and liquid categories; and thunder and severe potential on gmos_wx.php. Updated Frequently Asked Questions.
July 11, 2011
1200 UTC
Adjusted scheme for displaying severe weather. Isolated severe will not display on images.
June 15, 2011
1200 UTC
Smoothing routine introduced to underlying precipitation, thunder, and severe probabilities.
June 9, 2011
1200 UTC
GMOS/NDFD comparison page established.
June 7, 2011
1200 UTC
Sample points no longer display two of the same weather type (e.g. T+/T is now T+/RW).
June 2011
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GMOS Weather site established at https://sats.nws.noaa.gov/~wxgrid



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Page Last Modified: June 06 2017 19:42:42 UTC