Applied Meteorology Unit 1 High Resolution Analysis Products to Support Severe Weather and Cloud-to-Ground Lightning Threat Assessments over Florida 31.

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Presentation transcript:

Applied Meteorology Unit 1 High Resolution Analysis Products to Support Severe Weather and Cloud-to-Ground Lightning Threat Assessments over Florida 31 st Annual Meeting of the National Weather Association 17 October 2006 Jonathan L. Case 1, Scott Spratt 2, and David Sharp 2 1 ENSCO Inc., Cocoa Beach, FL 2 NOAA/NWS Melbourne, FL

Applied Meteorology Unit 2 Presentation Outline Description of operational high-resolution analyses at NWS Melbourne, FL (NWS MLB) Implementation of additional diagnostics –Severe weather products Supercell Composite Parameter (SCP) Significant Tornado Parameter (STP) –Cloud-to-ground lightning initiation signatures Sounding + reflectivity information Four reflectivity / temperature levels Sample results

Applied Meteorology Unit 3 Operational Analyses at NWS MLB Configuration of ARPS Data Analysis System (ADAS) –Analysis software from University of OK, similar to LAPS –Integrates all available data over FL peninsula 40-km RUC: background field for analysis Level II WSR-88D, satellite IR/VIS, sfc obs, mesonet, etc. Objectively analyzed onto grids using a Linux workstation –Run at high temporal (15 min) and spatial resolution (4 km) –Visualization, Time Animation, & Diagnostics in AWIPS & web – Result: More comprehensive understanding of evolving fine-scale weather features

Applied Meteorology Unit 4 Additional Products Implemented Supercell Composite Parameter (SCP) –Depict potential areas for supercell thunderstorms –Values > 1  threat for supercell thunderstorms Significant Tornado Parameter (STP) –Identify areas favorable for supercells producing F2+ tornadoes –Values > 1  threat for significant tornadic supercells –Reference: Thompson et al. (2003), Weather and Forecasting

Applied Meteorology Unit 5 Hurricane Charley Example: 1-km Composite Reflectivity

Applied Meteorology Unit 6 Hurricane Charley Example: Storm Prediction Center RUC Products* SCP at 1700 UTC 13 AUG 2004 STP at 1700 UTC 13 AUG 2004 *Courtesy of Roger Edwards, Storm Prediction Center

Applied Meteorology Unit 7 Hurricane Charley Example: 4-km ADAS SCP 4-panel Chart Legend: CAPEBRN_Shr 0-3SRH SCP

Applied Meteorology Unit 8 Hurricane Charley Example: 4-km ADAS STP 4-panel Chart Legend: 0-6Shr0-1SRH LCL STP

Applied Meteorology Unit 9 Additional Products Implemented Cloud-to-Ground Lightning Initiation Signatures –Based on Gremillion and Orville (1999) study over Kennedy Space Center, FL –Implemented 3 most skillful lightning initiation signatures > 40 dBZ at -10°C [CSI of 79%, 7.5 min median lead time] > 30 dBZ at -15°C [CSI of 71%, 12.5 min median lead time] > 20 dBZ at -20°C [CSI of 63%, 10.5 min median lead time] –Created 4-panel web displays Composite reflectivity Most skillful reflectivity threshold values

Applied Meteorology Unit 10 Hurricane Charley Example: 1-km ADAS 4-panel reflectivity 13 AUG UTC to 1900 UTC, every 5 min Reflectivity Plots Shown: Comp Corresponding NLDN CG lightning below

Applied Meteorology Unit 11 Summary Operational ADAS at NWS Melbourne, FL New diagnostics recently made available –Supercell Composite Parameter –Significant Tornado Parameter –Gremillion CG Lightning Initiation Signatures Examples –4-km operational Florida peninsula graphics –Prospective 1-km east-central Florida domain Questions? AMU Web page: