Evaluation of the Pseudo-GLM GLM Science Meeting Huntsville, Alabama 24-26 September 2013 Geoffrey Stano – NASA SPoRT / ENSCO Inc. Kristin Calhoun – NOAA.

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Presentation transcript:

Evaluation of the Pseudo-GLM GLM Science Meeting Huntsville, Alabama September 2013 Geoffrey Stano – NASA SPoRT / ENSCO Inc. Kristin Calhoun – NOAA NSSL / CIMMS Amanda Terborg – NOAA AWC / CIMSS

Outline Collaborators Evaluators Focus New since 2012 Evaluation Results Looking Forward

Collaborators Washington D.C. NASA operated networks Collaborative data sharing Proposed or currently unavailable Wallops Island North Alabama Kennedy Space Center North Georgia White Sands Langmuir Laboratory Dugway Provging Ground North Colorado Oklahoma Houston West Texas

Evaluators Spring Program (HWT) Focus: Primarily severe weather operations and product integration with AWIPS II GLM-related work Pseudo-GLM (PGLM) Total Lightning Tracking Tool New for 2013 Training module NASA SPoRT LMA plug-in Total Lightning Tracking Tool

Forecaster Examples 1910 UTC 1914 UTC Maximum Estimated Size of Hail (MESH) Combination of PGLM, tracking tool, and MESH Jump at 1909 UTC MESH exceeded 1” at 1914 UTC Severe hail reported at 1926 UTC 1909 UTC 40 flashes 0.63” 1.10”

Forecaster Examples Situational awareness example Strong updrafts (50 dBZ) up to 26 kft PGLM reached 40 flashes, just short of a jump Dime sized hail 10 minutes later “Although the storm didn’t reach severe criteria, it was beneficial that the Flash Extent Density updates in 1 minute intervals, which lets the warning forecaster monitor for rapid updraft development between radar volume scans.”

Summary of Feedback Usefulness of the PGLM Avg. of 3.95 out of 5 Usefulness of the TLTT Avg. of 3.24 out of 5 “The strengths were a good correlation with "lightning jumps", i.e., rapid increases in lightning density and increases in storm severity in terms of large hail. The weakness was several instances of data dropping out.” “The PGLM was very responsive recognizing quick ramp ups of lightning flashes.” “I found the FED to be extremely useful, especially with the sub-severe convection it offered a glimpse in the storms intensity between volume scans and offered a way to monitor their growing intensity.” The flash extent density proved most useful o Negatives were data drop outs and trying to implement the tracking tool The TLTT was conceptually very well received o Requires work on implementation “The frequency of one minute is great!” “The total lightning tracking tool is very beneficial, but it will take some modifications to make it useful to a warning forecaster.”

Evaluators Summer Experiment (AWC) Focus: Aviation forecast needs GLM-related work Pseudo-GLM mosaic Demonstrating total lightning New for 2013 Training module Completely revamped product display Incorporated lessons from 2012

The Pseudo GLM Mosaic 2013 used 7 collaborating networks All one display Updates every 2 minutes Improvements since 2012 Adjusted time stamp to better match NLDN time stamp Enhanced color curve (more fidelity) Range rings Network status bars

Forecaster Example This example best used by the convective desk or at CWSUs Radar showed storms between Dallas and Houston Limited CG activity PGLM showed >40 flashes in 2 min Flights began diverting Animation: PGLM Mosaic (Houston LMA) with aircraft flight tracks and radar reflectivity snapshot Why not just use radar? Learn concepts now for when GLM observing data sparse regions

Forecaster Examples Example from upcoming publication PGLM observing flashes behind main line of convection Useful to convective SIGMET forecasters “Throughout different cases we found about a 5 to 10 minute increase time when we had an increase in PGLM data when reflectivity increased afterwards. This can be helpful to forecasters.” 2-min PGLM with NLDN Radar Reflectivity

Summary of Feedback Numerous challenges based on limited convection during evaluation and limited LMA domains and their locations Although limited, participants were pleased with the results Particular interest from the Convective SIGMET and National Aviation Meteorologist (NAM) desk Advise traffic flow managers (divert routes or “shoot the gap”) Monitor convection for SIGnifican METeorology statements Global graphics desk extremely interested in total lightning PGLM too limited in domain for evaluation, but… Lightning is one of the main ways their products are produced and validated Other uses Determining if the cap is breaking Updates to mesoscale discussions

Looking Forward Overall: Strong buy-in from forecasters Upcoming Activities PGLM mosaic moving to the operations floor (AWC/SPC) Also preparing the AWIPS II version of product AWIPS II Updating the Total Lightning Tracking Tool based on feedback Will be evaluated by the Operations Proving Ground (Spring 2014) Baseline the SPoRT LMA plug-in for Spin-off: Can support Earth Networks data SPoRT preparing a Spring 2014 total lightning evaluation More collaborations Central Florida, North Georgia, and Wallops Island LMAs

Questions Thank-you for your time! Geoffrey Stano SPoRT webpage: Wide World of SPoRT Blog: Hazardous Weather Testbed Blog: Aviation Weather Testbed Blog: