Synthetic Imagery in Forecasting Orographic Cirrus
Satellite Proving Ground
Synthetic imagery analysis in forecasting orographic cirrus (lee wave clouds) has advantages:
Orographic cirrus is more readily identified compared to looking at model output fields, such as relative humidity over a layer.
Increased temporal resolution – hourly rather than model output times (NAM – 3 hourly ; GFS – 6 hourly)
Best approach is to blend synthetic imagery (WRF-ARW, CRAS, etc.) with model output fields from multiple operational models. This method combines a visual way of identifying orographic cirrus with an ensemble approach of looking at multiple models.
NOAA/NWS students – to begin the training, use the web-based video, YouTube video, or audio playback options below (if present for this session). Certificates of completion for NOAA/NWS employees can be obtained by accessing the session via the Commerce Learn Center
Audio playback (recommended for low-bandwidth users) – This is an audio playback version in the form of a downloadable VISITview and can be taken at anytime.
After extracting the files into that directory click on either the visitplay.bat or visitauto.bat file to start the lesson. If both files are present, use visitauto.bat
Live VISIT teletraining (with an instructor leading the session). Check the VISIT Training Calendar to signup for teletraining. The session will last 30 minutes. This teletraining session uses the VISITview software, where a Windows PC with an Internet connection is needed. Please follow the teletraining installation instructions to install the session.
Talking points are available for this lesson and may be printed out to easily review the session in detail at any time.
Bikos, D., Lindsey, D.T., Otkin, J., Sieglaff, J., Grasso, L., Siewert, C., Correia Jr., J., Coniglio, M., Rabin, R., Kain, J.S., and S. Dembek, 2012: Synthetic Satellite Imagery For Real-Time High Resolution Model Evaluation. Wea. Forecasting,27,784-795. http://dx.doi.org/10.1175/WAF-D-11-00130.1
Skamarock, W. C., J. B. Klemp, J. Dudhia, D. O. Gill, D. M. Barker, W. Wang and J. G. Powers, 2005: A Description of the Advanced Research WRF Version 2, NCAR technical note.
This course is Basic
There are no prerequisites
VISIT teletraining makes use of either Gotomeeting or the VISITview software. Consult the email with setup instructions as to which software is being used, the following are setup instructions that make use of the VISITview software:
1.) In order to install this lesson, you will need to create a new directory on your local hard (not a networked) drive. 2.) You will need to download a file that contains the contents of the lesson so that streaming live data is avoided.
2a.) For a Windows system:
Download the following .exe file to your local hard drive
~~~ Place EXE file here ~~~~
After the download is complete, click on the .exe file and it will self-extract. Go to step 3.
2b.) For Linux and Mac systems (Windows users skip to step 3):
Download the following .zip file to your local hard drive:
~~~~Place ZIP file here~~~~~~
Extract the contents of the zip file into the directory you created in step 1.
3.) At the time of the teletraining start the VISITview software
For a Windows system: click on the visit.bat file
For Linux / Mac systems: run the visit.sh file) sh ./visit.sh
Dial into the phone number provided in the email with setup instructions and the instructor will greet you.