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Findings of the Four-Dimensional Storm Cell Investigator (FSI) Alpha Test at WFO Omaha-Valley During the Convective Season. Daniel Nietfeld NOAA / National Weather Service Valley, Nebraska dan.nietfeld@noaa.gov. The (FSI) Alpha Test - Why Omaha ???. D3D evaluation and research 2001-2004

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slide1

Findings of the Four-Dimensional Storm Cell Investigator (FSI) Alpha Test at WFO Omaha-Valley During the Convective Season

Daniel Nietfeld

NOAA / National Weather Service

Valley, Nebraska

dan.nietfeld@noaa.gov

the fsi alpha test why omaha
The (FSI) Alpha Test - Why Omaha ???
  • D3D evaluation and research 2001-2004
  • GR2AE usage since spring 2006
  • Attendee of 1st Workshop on NWS Severe Wx Technology – D.C. July 2005
  • Expected to have 4 summer students ( got 3)
four dimensional stormcell investigator fsi
Four-Dimensional Stormcell Investigator (FSI)
  • To increase warning skill and lead time, and therefore improve public service,
  • 3D/4D visualization will allow forecasters to:
    • better analyze the signatures which are useful in diagnosis of severe and tornadic storms.
    • discover new clues and signatures not easily observed using traditional 2D analysis methods.
the lemon technique 1977
The Lemon Technique (1977)
  • Original storm structure analysis methods infer vertical structure from horizontal slices at different elevation angles
slide5

AWIPS (D2D) 3D storm interrogation shortcomings

  • AWIPS users must infer vertical storm structure using 2D representations of radar data.
  • All Tilts or 4-panels: a series of 2D “horizontal” cross-sections
    • But PPIs are not horizontal – elevation angles are slanted.
  • AWIPS Vertical Cross-sections (OB7.1)
    • Not easy to use
    • Only complete during short period at end of volume scan
    • Data are remapped to Cartesian space
    • Not dynamic (must re-draw to get new cross-section)
  • Warning decision making demands quick and rapid assessment of the 3D structure of storms.
solution four dimensional stormcell investigator fsi
Solution:Four-Dimensional Stormcell Investigator (FSI)
  • Integrate National Severe Storms Laboratory (NSSL) Warning Decision Support System – Integrated Information (WDSSII) 3D/4D display technology into AWIPS
    • Uses Open GL hardware acceleration on the NVIDIA 3D graphics card on the new LX workstation
  • FSI will be launched via a D2D extension.
    • Once extension is loaded, mouse click will open FSI application centered on storm of interest
requirements for developers
Requirements for Developers:
  • Provide for quick and easy access to the data (15-30 seconds per storm)
  • Provide linkages between 2D representations and 3D data
    • Still difficult for users to overcome tendency to view in traditional 2D manner
  • Radar data must be “native” 8-bit resolution polar grids
    • Z, V, SRM, SW
  • 4D: Animation while slicing and dicing
  • Keyboard shortcuts
  • Processes must be stable and cause minimal impact to AWIPS system resources
fsi configuration
PPI

Plan

Position

Indicator

VDX

Vertical

Dynamic

X-Section

CAPPI

Constant

Altitude

PPI

3D Flier

Three-

Dimensional

Flier

FSI Configuration
  • FSIalpha has a linked 4-panel design:
fsi data handling
FSI Data Handling
  • Data from RPG (must be on RPS list)
  • “Virtual Volume” with each new slice filling in display, replacing old slice
  • ~ 2 hours of data (not based on “frames”)
  • Fairly smart pixel “smoothing”, which is referred to as data “interpolation”
  • Currently single radar only
fsi alpha test
FSI Alpha Test
  • FSI alpha tested on AWIPS OB7.2 with new LX:
    • SR: Melbourne FL (April - present)
    • SR: Huntsville, AL (July - present)
    • CR: Omaha, NE (May 7 – present)
  • Missed the May 5th tornado outbreak
  • Greg Stumpf (CIMMS/NSSL/MDL) installed the software, trained most of the staff
    • SOO provided additional training
  • Have evaluated on XX severe thunderstorm events
fsi alpha test objectives
To determine the stability of the FSI software during real-time operational warning situations.

To gain feedback from operational warning meteorologists on the utility and effectiveness of the FSI display and to suggest improvements before it is deployed into AWIPS.

To develop subject-matter expertise within WFO meteorologists that could help guide the development of the training on the concept of operations using 3D radar analysis.

Assess the operational impact of advanced radar analysis tools on NWS performance measures.

FSI Alpha TestObjectives
oax found that the software is beneficial for
OAX found that the software is beneficial for…
  • Circulations… depth, diameter, VrShear
  • Core Heights
    • Ascending Cores
    • Descending Cores
  • Storm Top Divergence Magnitude
  • Storm Structure
    • Tilt, Overhang, BWERs, etc…
  • Rear-Front… and Front-Rear air flow thru lines
  • Mid-altitude radial convergence (MARC) sigs.
our preliminary findings
Our Preliminary Findings…
  • Cross Section extremely useful
    • Ability to fully move cross section
    • Ability to drag Z axis
  • CAPPI extremely useful
  • “Virtual Volume” is most efficient/current
  • Data display is functional
  • Nice to have ~ 2 hours of data (not 64 frames)
our preliminary findings1
Our Preliminary Findings…
  • A bit sluggish for our liking
  • Would like to have ability for Z and SRM on same display somehow
  • Sampling is critical, and essential
  • Some display errors
  • Color table editing critical
oax wishlist
OAX Wishlist
  • True 3-D volume rendering
  • Multiple Radar mosaics
  • Environmental data overlays
  • WarnGen launched from FSI
  • Storm Motion for SRM easy to set/change
  • Level II data direct from RDA
  • CAPPI on constant surfaces other than Z
    • -20C isotherm, theta or theta-E, EL, etc…
fsi operational considerations
FSI Operational Considerations
  • Training on the understanding of storm signatures in 3D representations to be developed by WDTB in concert with MDL.
  • Workload management/human factors
    • Partnering with Klein Associates, a leading decision science company, to conduct Cognitive Task Analysis.
  • 3D visualization is reaching WFOs via other applications
    • 3D experience is gaining in the field.
fsi operational release
FSI Operational release
  • FSI 1.0 operational release: AWIPS OB8.2 (prior to Spring 2008)
  • Resources did not permit all features to be included in FSI1.0:
    • No Data sampling
    • Super-resolution data not supported
    • TDWR data not supported
    • Storm-motion for SRM must be changed via D2D and FSI relaunch
    • No colormap editor
  • FSI 2.0 (tentative – OB8.3):
    • Super-resolution data; Polarimetric variables
    • Data Sampling (multi-parameter)
    • Improved texture drawing (faster, less memory)
    • Other suggestions from alpha test
fsi operational release1
FSI Operational release
  • Beyond:
    • 3D volume rendering and isosurfaces
    • Data advection (to remove drift)
    • Display of single radars from multiple locations concurrently
    • 3D grids of mosaicked multiple-radar data
    • Integration with near-storm environment data from numerical models
      • Add Temperature contours to vertical cross sections
      • Constant Temperature PPIs (CTPPIs).
  • Next-generation AWIPS (AWIPS2):
    • Common AWIPS Visualization Environment (CAVE) should require fully-integrated support for 3D visualization.
slide33

Findings of the Four-Dimensional Storm Cell Investigator (FSI) Alpha Test at WFO Omaha-Valley During the Convective Season

Daniel Nietfeld

NOAA / National Weather Service

Valley, Nebraska

dan.nietfeld@noaa.gov