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SCAN S ystem for C onvection A nalysis and N owcasting Operational Use Refresher

SCAN: 4 th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009. SCAN S ystem for C onvection A nalysis and N owcasting Operational Use Refresher. Tom Filiaggi Tom.Filiaggi@noaa.gov & Lingyan Xin Lingyan.Xin@noaa.gov Decision Assistance Branch

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SCAN S ystem for C onvection A nalysis and N owcasting Operational Use Refresher

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  1. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 SCANSystem for Convection Analysis and NowcastingOperational Use Refresher Tom Filiaggi Tom.Filiaggi@noaa.gov & Lingyan Xin Lingyan.Xin@noaa.gov Decision Assistance Branch Meteorological Development Laboratory August, 2009 http://www.nws.noaa.gov/mdl/scan

  2. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 Agenda • Graphical Elements • Main Display: Cell Table, Icon graphic • Including Alarm functions • QPF displays • SCAN CWA Threat Index • SCAN Data Monitoring System (DMS) • ‘Recently’ Fielded Functionality • Unwarned Storm Cell • DMD Display and enhanced Time-Height • Service Backup enhancement • MDA: Mesocyclone Detection Algorithm • Time of Arrival Tool • Hail Diagnostics (ie: VIL Density) http://www.nws.noaa.gov/mdl/scan

  3. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 SCAN Menu Contents • Storm Cells / Site Storm Threat • Tabular data from Cells, Mesos, TVSs • Graphic Icon D2D image • Storm DMD Icons & Table • Tabular data and graphic Icons for DMDs • QPF from . . . • Probabilistic and categorical contours • SCAN CWA Threat Index (SCTI) • Color grid with arbitrary rules • Hail Diagnostics • Several forms to choose from • Precipitation Rate • Straight conversion of DHR radar product to rain rate (via Z/R) http://www.nws.noaa.gov/mdl/scan

  4. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 Graphical ElementsMain Display • Storm Cell Table, including: • Storm Cell Trends • Color Thresholds • Alarms • D2D graphic, including: • Storm Cell Icons • Local Site Threat Icons • Storm Cell Monitor http://www.nws.noaa.gov/mdl/scan

  5. Graphical Storm Cell Icons

  6. Configuration Elements

  7. Tabular Storm Cell Presentation

  8. Rate of Change and Absolute Alarms

  9. Storm Cell Attribute Time Trends

  10. Severe Weather Monitor

  11. Local Site Threats

  12. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 Storm Cell Identification Display (SCID) Window • Launched from the Configurations menu • Controls zoom factor of inspected cell • Modify how D2D displays storm cells http://www.nws.noaa.gov/mdl/scan

  13. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 The Attribute Color Threshold (ACT) Window • Controls color coding of trends, table body cells • Launched in two ways: • From the Configurations menu, box colors submenu • Right-clicking on a storm attribute label http://www.nws.noaa.gov/mdl/scan

  14. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 Alarm Functions • Alarm information window • Alerts user to temporal increases in an attribute that exceed a user set threshold • Left-click invokes trend and zoom • Rate of Change Alarm and Absolute Alarm Threshold Window • Modify the thresholds needed to set off alarms • In the Configurations menu http://www.nws.noaa.gov/mdl/scan

  15. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 Alarm Functions (cont’d) • New Alarm Time Setup Window • Sets time thresholds for new alarms • Alarm controls accessed through the Configurations menu • Message sent through Guardian http://www.nws.noaa.gov/mdl/scan

  16. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 1 Hour QPF:Probabilistic & Categorical • Categorical • Contours up to 0.7 inches • Probabilistic • Probability contours for various thresholds of accumulation http://www.nws.noaa.gov/mdl/scan

  17. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 SCAN CWA Threat Index • Arbitrary Thresholds • Utilizing TVS, Meso, and Storm Cell traits • Colored Grid • Traffic light • Sampled text http://www.nws.noaa.gov/mdl/scan

  18. Monitor the status of SCAN data inputs residing on your Data Server Use display workstation Netscape browser SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 SCAN Data Monitoring System http://www.nws.noaa.gov/mdl/scan

  19. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 OB3/8.1 Recently Fielded Functionality Unwarned Storm Cell • User-defined Thresholds • Checks storm cell locations against existing warnings • Changes Storm Cell ID foreground color in the SCAN Storm Cell Table http://www.nws.noaa.gov/mdl/scan

  20. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 OB4 Recently Fielded Functionality Digital Meso Detection (DMD) • Similar to Storm Cell Table (Table, Trends, Display icons) • Time-Height Trends! • Rapid Update (every elevation scan in about 20 seconds) • Time Height Trend Enhancement (OB7) http://www.nws.noaa.gov/mdl/scan

  21. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 OB6 Recently Fielded Functionality Time of Arrival • Tool much like Speed/Distance • Point, Line, and Poly-line modes, and circular front • Local and UTC time http://www.nws.noaa.gov/mdl/scan

  22. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 OB6 Recently Fielded Functionality Hail Diagnostics • VIL Density – (VIL / Echo Top x 1000) • Experimental product to detect severe hail • Enhanced 1km VIL Density that dilates echo tops http://www.nws.noaa.gov/mdl/scan

  23. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 - - - Summary - - - SCAN’s value is expected to vary, depending on: • Convective Scenario • Forecaster’s needs and expectations • Elements utilized • Forecaster’s Familiarity with SCAN’s functions • Forecaster’s Familiarity with Radar Meteorology Therefore, NWS forecasters should: • Use SCAN for what it is good for (which is subjective). • Do not expect SCAN to tell you when to Warn and when not to Warn. • Focus on the human requirement in Decision Making. Let SCAN automate the things that are automate-able. • Use SCAN as a Decision Assistance Tool http://www.nws.noaa.gov/mdl/scan

  24. SCAN: 4th Regional Severe Storms / Radar and Hydrology Conference Overview, August 2009 SCAN Website • Additional Information can be found on the SCAN website: • http://www.nws.noaa.gov/mdl/scan http://www.nws.noaa.gov/mdl/scan

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