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![Page 1: 11 th Annual High Plains Conference Findings of the Four- Dimensional Storm Cell Investigator (FSI) Alpha Test at WFO Omaha-Valley During the Convective.](https://reader030.fdocuments.net/reader030/viewer/2022033106/56649e415503460f94b33e5b/html5/thumbnails/1.jpg)
11th Annual High Plains Conference
Findings of the Four-Dimensional Storm Cell
Investigator (FSI) Alpha Test at WFO Omaha-Valley During the
Convective Season
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
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11th Annual High Plains Conference
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)
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11th Annual High Plains Conference
• 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.
Four-Dimensional Stormcell Investigator (FSI)
Four-Dimensional Stormcell Investigator (FSI)
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11th Annual High Plains Conference
The Lemon Technique (1977)
• Original storm structure analysis methods infer vertical structure from horizontal slices at different elevation angles
• Original storm structure analysis methods infer vertical structure from horizontal slices at different elevation angles
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11th Annual High Plains Conference
• 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.
AWIPS (D2D) 3D storm interrogation shortcomings
AWIPS (D2D) 3D storm interrogation shortcomings
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11th Annual High Plains Conference
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
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11th Annual High Plains Conference
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
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11th Annual High Plains Conference
FSI Configuration
PPIPlan Position Indicator
VDXVertical DynamicX-Section
CAPPIConstantAltitudePPI
3D FlierThree-DimensionalFlier
• FSIalpha has a linked 4-panel design:• FSIalpha has a linked 4-panel design:
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11th Annual High Plains Conference
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
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11th Annual High Plains Conference
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
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11th Annual High Plains Conference
FSI Alpha TestObjectives
• 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.
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11th Annual High Plains Conference
Cone
of S
ilenc
e
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
High Wind Event – Harlan IAAugust 12th, 2007
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
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11th Annual High Plains Conference
QLCS Tornado IdentificationNon-Descending – Quick Spinups
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11th Annual High Plains Conference
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.
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11th Annual High Plains Conference
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)
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11th Annual High Plains Conference
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
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11th Annual High Plains Conference
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…
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11th Annual High Plains Conference
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.
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11th Annual High Plains Conference
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
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11th Annual High Plains Conference
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.
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11th Annual High Plains Conference
Findings of the Four-Dimensional Storm Cell
Investigator (FSI) Alpha Test at WFO Omaha-Valley During the
Convective Season
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