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Great Lakes Coastal Forecasting System

What's New Page

  • Apr 25, 2017
    Starting today, ice was turned off.
  • Dec 13, 2016
    Starting today, ice was turned on. ICE=1, ALPHAICE=0.01. All 5 lakes.
  • May 4, 2016
    Starting today, ice was turned off.
  • Dec 2, 2015
    Starting today, ice was turned on. ICE=1, ALPHAICE=0.01. All 5 lakes.
  • May 31, 2015
    Starting today, ice was turned off.
  • Nov 22, 2014
    Starting today, ice was turned on. ICE=1, ALPHAICE=0.01. All 5 lakes.
  • June 9, 2014
    Starting today, ice was turned off.
  • Dec 3, 2013
    Starting today, ice was turned on. ICE=1, ALPHAICE=0.01. All 5 lakes.
  • May 3, 2013
    Starting today, ice was turned off.
  • Dec 5, 2012
    Starting today, ice was turned on. ICE=1, ALPHAICE=0.01. All 5 lakes.
  • Dec 3, 2012
    Starting today, potential vessel icing product is being displayed on the glcfs-ice.php pages.
  • Nov, 2012
    Temperature plots now show temp as continuous instead of discrete.
  • June, 2012
    POMGL-2007 and POMGL-ICE-2011 were recoded to set salinity equal to 0.2.
  • Apr 10, 2012
    Starting today, ice was turned off.
  • Dec 5, 2011
    Starting today, ice was turned on. ICE=1, ALPHAICE=0.01. All 5 lakes.
  • May 24, 2011
    pomgl-ice model now used for all lakes, nowcast and forecast, ISFLUX=10 to utilize the ice model. Simulation re-run starting DOY 101, 2011.
  • May 19, 2011
    New constant-temp restart files were generated, based on water temps from GLSEA, DOY 099, 2011. Simulation re-run starting DOY 101, 2011.
  • May 2, 2011
    Starting today , ice was turned off.
  • Dec 8, 2010
    Starting today, ice was turned on.
  • Dec 1, 2010
    Ice assimilation added to Lake Erie pomgl-ice.
  • Ju1 19, 2010
    Began using shallow water wave model for Lake St Clair ncast and fcast.
  • Jun 9, 2010
    Added Lake St. Clair (500m grid) to forecast cycle. ndfd data and wave model only. Started runs on day 001.
  • Apr 27, 2010
    Added Lake St. Clair (500m grid) to nowcast cycle. Met data and wave model only. Started runs on day 101.
  • Apr 14, 2010
    Starting today (12Z, 4/14/10), ice was turned off.
  • Nov 3, 2009
    New pomgl-ice model replaced pomgl. For Lake Erie nowcast and forecast, ISFLUX=10 to utilize the ice model. For the other lakes, ISFLUX=0 to use the original heat flux subroutines (i.e., no ice).
  • Sep 23, 2009
    'nudging' was turned off, as it was determined to create erroneous temp structure (e.g., too much heat at depth). All of 2009 nowcasts were re-run w/o 'nudging'.
  • Jun 23, 2009
    Data assimilation was added to the GLCFS nowcasts. The daily GLSEA temperature for each lake is compared to the lake-wide average surface temperature. The difference is set to a parameter called Tadj. Once per day, Tadj is uniformly added to the temp field for each lake, preserving the vertical structure. This process is also known as 'nudging'.
  • Feb 19, 2009
    Lake Huron was switched from 5km to 2km. The entire year was rerun using the new grid. Lake Huron now also includes static river flow.
  • May 25, 2007
    Forecast scripts modified to use NDFD air temps and winds when available instead of ETA air temps and winds.
  • Mar 30, 2006
    Lake Michigan was switched from 5km to 2km. The entire year was rerun using the new grid. Lake Michigan now also includes static river flow.
  • Mar 22, 2006
    Lake Erie was switched from 5km to 2km. The entire year was rerun using the new grid. Lake Erie now also includes static river flow.
  • Dec 06, 2005
    Starting today (0Z, 12/6/05), ice was turned on.
  • Apr 28, 2005
    Starting today (0Z, 4/28/05), ice was turned off.
  • Feb 2, 2005
    Starting today (0Z, 2/2/05), the GLCFS wave model runs (nowcast and forecast) will take into account the ice cover from the most recent GLSEA. This includes the grib wave files (mapped onto the awips227 grid) I am ftping to the NWS gateway. The waves are dampened as a function of the ice concentration.
  • Jan 11, 2005
    Moved the GLCFS site to /res/glcfs/.
  • Apr 15, 2004
    Began appending GLSEA sea surface temps/ice concentration to the gribbed wave heights (forecast 2x per day) being sent to NWS gateway for dissemination via AWIPS.
  • Mar 04, 2004
    Extended the GLCFS forecasts out to 60 hrs (from 48 hrs).
  • Oct 17, 2002
    Began ftping GLCFS wave forecasts (2x per day, grib format) to NWS gateway for dissemination via AWIPS.
  • Sep 11, 2002
    Added Surface Currents to graphical products
  • Aug 01, 2002
    Added Lakes Superior and Ontario POMGL to nowcast and forecast cycles
  • July 03, 2002
    Replaced Lake Superior 15-km bathy grid with Lake Superior 10-km grid
  • Dec 12, 2001
    Began using the ETA-12 model on the AWIPS-215 (20 km) grid
  • Nov 30, 2001
    Switched from NCEP's ETA-22 km grid to NCEP's ETA-12 km grid
  • Apr 04, 2001
    Added Lake Michigan 5-km POMGL to forecast cycle
  • Apr 02, 2001
    Added Lake Michigan 5-km POMGL to nowcast cycle
  • Feb 06, 2001
    Replaced Lake Michigan 15-km bathy grid with Lake Michigan 5-km grid
  • Oct 13, 2000
    Replaced Lake Ontario 10-km bathy grid with Lake Ontario 5-km grid
  • Oct 11, 2000
    Extended Forecast to 48 hours from 36 hours
  • Sep 26, 2000
    Switched from NCEP's ETA-32 km grid to NCEP's ETA-22 km grid
  • Mar 29, 2000
    Added Lake Huron 5-km POMGL to forecast cycle
  • Feb 03, 2000
    Added Lake Huron 5-km POMGL to nowcast cycle
  • Sep 22, 1999
    Replaced Lake Huron 15-km bathy grid with Lake Huron 5-km grid
  • Oct 20, 1999
    Replaced interpgl (nearest neighbor) with metedit and interpnn (natural neighbor)
  • Aug, 1998
    Switched from NCEP's ETA-29 km grid to NCEP's ETA-32 km grid