Based on the Oklahoma ARPS (Advanced Regional Prediction System) Data Assimilation
System
- Developed by the Center for Analysis and Prediction of Storms (CAPS)
Project Goals:
- Obtain real time, high resolution analyses over complex terrain
- Assist in local weather forecasting
Based on the Oklahoma ARPS (Advanced Regional Prediction System) Data Assimilation
System
- Developed by the Center for Analysis and Prediction of Storms (CAPS)
Project Goals:
- Obtain real time, high resolution analyses over complex terrain
- Assist in local weather forecasting
Description of the Utah ADAS
3-Dimensional mesoscale analysis system
220x220 km domain
2 km horizontal resolution
Stretched vertical coordinate
Run at one-hour intervals
Analyses run in two parts
- temperature, relative humidity, pressure and wind analysis
- cloud analysis
Data Used in the Analyses
Main Analysis:
- RUC2 analysis used for initial background field
- Regression data replaces T, Td at first model level
- Surface obs from Utah mesonet
- NWS rawinsonde at 0 and 12 UTC
- NWS WSR-88D velocity and reflectivity data
Cloud Analysis
- 3-D background field from ADAS RH analysis
- Option to use METAR data
- Visible and Infrared satellite imagery
- Radar reflectivities
ADAS Features
Bratseth Interpolation Scheme
- Successive correction technique
- Accounts for background to observation error
- Generally insensitive to observation density
Automated Quality Control
- 2-Dimensional scheme
New Vertical Weighting Added to Analysis
- Limit influence of high elevation observations on free atmosphere
- Spread high elevation observation information to data sparse high elevation regions
Future Goals
Incorporate Additional Data Sources
- Satellite sounder data
- Dugway Proving Grounds wind profiler data
- ACARS data
- FAA radar data
Implement Linear Regression Q-C Flags
Experiment with domain size and resolution
Use ADAS to initialize ARPS
- short term, high resolution forecasts
Products Available
Utah Mesonet Web Page
http://www.met.utah.edu/jhorel/mesonet/data.html
Utah ADAS Information
http://www.met.utah.edu/jhorel/html/adas/info/information.html
Conference Papers:
3-Dimensional mesoscale analysis system
220x220 km domain
2 km horizontal resolution
Stretched vertical coordinate
Run at one-hour intervals
Analyses run in two parts
- temperature, relative humidity, pressure and wind analysis
- cloud analysis
Data Used in the Analyses
Main Analysis:
- RUC2 analysis used for initial background field
- Regression data replaces T, Td at first model level
- Surface obs from Utah mesonet
- NWS rawinsonde at 0 and 12 UTC
- NWS WSR-88D velocity and reflectivity data
Cloud Analysis
- 3-D background field from ADAS RH analysis
- Option to use METAR data
- Visible and Infrared satellite imagery
- Radar reflectivities
ADAS Features
Bratseth Interpolation Scheme
- Successive correction technique
- Accounts for background to observation error
- Generally insensitive to observation density
Automated Quality Control
- 2-Dimensional scheme
New Vertical Weighting Added to Analysis
- Limit influence of high elevation observations on free atmosphere
- Spread high elevation observation information to data sparse high elevation regions
Future Goals
Incorporate Additional Data Sources
- Satellite sounder data
- Dugway Proving Grounds wind profiler data
- ACARS data
- FAA radar data
Implement Linear Regression Q-C Flags
Experiment with domain size and resolution
Use ADAS to initialize ARPS
- short term, high resolution forecasts
Products Available
Utah Mesonet Web Page
http://www.met.utah.edu/jhorel/mesonet/data.html
Utah ADAS Information
http://www.met.utah.edu/jhorel/html/adas/info/information.html
Conference Papers:
Main Analysis:
- RUC2 analysis used for initial background field
- Regression data replaces T, Td at first model level
- Surface obs from Utah mesonet
- NWS rawinsonde at 0 and 12 UTC
- NWS WSR-88D velocity and reflectivity data
Cloud Analysis
- 3-D background field from ADAS RH analysis
- Option to use METAR data
- Visible and Infrared satellite imagery
- Radar reflectivities
ADAS Features
Bratseth Interpolation Scheme
- Successive correction technique
- Accounts for background to observation error
- Generally insensitive to observation density
Automated Quality Control
- 2-Dimensional scheme
New Vertical Weighting Added to Analysis
- Limit influence of high elevation observations on free atmosphere
- Spread high elevation observation information to data sparse high elevation regions
Future Goals
Incorporate Additional Data Sources
- Satellite sounder data
- Dugway Proving Grounds wind profiler data
- ACARS data
- FAA radar data
Implement Linear Regression Q-C Flags
Experiment with domain size and resolution
Use ADAS to initialize ARPS
- short term, high resolution forecasts
Products Available
Utah Mesonet Web Page
http://www.met.utah.edu/jhorel/mesonet/data.html
Utah ADAS Information
http://www.met.utah.edu/jhorel/html/adas/info/information.html
Conference Papers:
Bratseth Interpolation Scheme
- Successive correction technique
- Accounts for background to observation error
- Generally insensitive to observation density
Automated Quality Control
- 2-Dimensional scheme
New Vertical Weighting Added to Analysis
- Limit influence of high elevation observations on free atmosphere
- Spread high elevation observation information to data sparse high elevation regions
Future Goals
Incorporate Additional Data Sources
- Satellite sounder data
- Dugway Proving Grounds wind profiler data
- ACARS data
- FAA radar data
Implement Linear Regression Q-C Flags
Experiment with domain size and resolution
Use ADAS to initialize ARPS
- short term, high resolution forecasts
Products Available
Utah Mesonet Web Page
http://www.met.utah.edu/jhorel/mesonet/data.html
Utah ADAS Information
http://www.met.utah.edu/jhorel/html/adas/info/information.html
Conference Papers:
Incorporate Additional Data Sources
- Satellite sounder data
- Dugway Proving Grounds wind profiler data
- ACARS data
- FAA radar data
Implement Linear Regression Q-C Flags
Experiment with domain size and resolution
Use ADAS to initialize ARPS
- short term, high resolution forecasts
Products Available
Utah Mesonet Web Page
http://www.met.utah.edu/jhorel/mesonet/data.html
Utah ADAS Information
http://www.met.utah.edu/jhorel/html/adas/info/information.html
Conference Papers:
Utah Mesonet Web Page
http://www.met.utah.edu/jhorel/mesonet/data.html
Utah ADAS Information
http://www.met.utah.edu/jhorel/html/adas/info/information.html
Conference Papers: