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RAMMB: GOES-R Proving Ground Blog

  • Synthetic imagery for the 3 Dec 2013 fog/low cloud case

    The previous blog entry discussed CIRA satellite imagery that can be useful in highlighting fog and low clouds.  These images utilize existing satellite imagery to create images that try to replicate those that will be available in the GOES-R era.  Another method to create GOES-R type imagery is to use output from a high-resolution model […]

  • Widespread Fog East of the Rockies – 3 Dec 2013

    Widespread fog and low clouds covered much of the nation east of the Rockies 0n the morning of 3 Dec in the moist airmass ahead of the developing western storm and strong cold front that has since pushed south.  Dense Fog Advisories were issued by many WFOs, as seen in the graphic below valid at […]

  • October 17, 2012 fog over Wisconsin

    Let’s examine the synthetic low cloud / fog product from the 4-km NSSL WRF-ARW model.  This is from the 0000 UTC 17 October run valid between 0900-1600 UTC 17 October: http://rammb.cira.colostate.edu/templates/loop_directory.asp?data_folder=training/visit/loops/17oct12_syn_fog&image_width=1020&image_height=900 Low cloud / fog is depicted as blue in this color table, with mid- to high level clouds being black / dark grey.  Early […]

  • Synthetic low cloud / fog imagery to forecast stratus

    The synthetic low cloud / fog product from the NSSL WRF-ARW model has a variety of forecasting applications.  One of those is forecasting the development of stratus clouds. The NWS forecast office in Austin / San Antonio made use of this product for the above mentioned application on September 23: AREA FORECAST DISCUSSION NATIONAL WEATHER […]

  • Synthetic Satellite Imagery evaluated at SPC

    As part of NOAA’s Hazardous Weather Testbed Spring Experiment at the Storm Prediction Center, CIRA is delivering 3 synthetic imagery products to be evaluated in the Experimental Warning Portion of the experiment in their AWIPS-II system: 6.95 micrometers, 10.35 micrometers, and the 10.35 – 12.3 micrometer difference product.  Chris Siewert is hosting a separate blog […]

  • ORI product for 18-20 December 2010 massive California rain event

    A period of extremely heavy rain and massive higher elevation snow hit California and other portions of the West during mid-December 2010.  Here we take a look at the ORI product for a portion of this storm, concentrating on Central and then Southern California.  The ORI (for Orographic Rain Index) product is designed to indicate […]

  • Low cloud/fog example from Boulder WFO case from AWIPS on 9 December 2010

    GeoColor and Low cloud/Fog GOES-R Proving Ground imagery from CIRA has been available at the Boulder WFO for several years.  After feedback from the forecasters, recently GeoColor imagery without the city lights was added.  This example shows both types of GeoColor imagery along with the Low Cloud/Fog product for a case of expanding low clouds […]

  • Cloud over snow example on 30 November 2011 from Buffalo WFO using MODIS imagery

    Cloud over snow example on 30 November 2011 from Buffalo WFO using MODIS imagery

    Buffalo WFO SOO David Zaff collected this imagery from one of the forecasters, Robert Hamilton, who sent him the following message: “I found it very interesting to see snow cover on the basic IR imagery late this afternoon, so I have attached both the IR and VIS imagery from 19z.  ‘Sampling’ over the snow cover on the IR imagery, I was getting […]

  • Synthetic IR imagery showing fog/low clouds from BOU WFO on 8 November 2011

    Synthetic IR imagery showing fog/low clouds from BOU WFO on 8 November 2011

    This example from the Boulder WFO shows the use of synthetic IR imagery generated from the 4-km horizontal grid resolution NSSL WRF model for predicting an area of fog and low clouds near the Denver International Airport (DIA) on the morning of 8 November 2011.  The WRF model is run daily at 0000 UTC, and […]

  • Synthetic Fog Product – November 19/20, 2011 example

    This blog entry will look at an example of the synthetic fog product (from the 4-km NSSL WRF-ARW model) for an event that took place during the overnight hours of November 19 to 20, 2011. Here is the synthetic fog product during the overnight hours: http://rammb.cira.colostate.edu/templates/loop_directory.asp?data_folder=training/visit/loops/19nov11_syn_fog There is southerly flow advecting moisture from the Gulf […]

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