Development and Implementation of NHC/JHT Products in ATCF Charles R. Sampson NRL (PI) Contributors: Ann Schrader, Mark DeMaria, John Knaff, Chris Sisko,

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Presentation transcript:

Development and Implementation of NHC/JHT Products in ATCF Charles R. Sampson NRL (PI) Contributors: Ann Schrader, Mark DeMaria, John Knaff, Chris Sisko, Jim Gross, Chris Lauer and Colin McAdie, Tim Marchok March 2006 Acknowledgements: NOAA USWRP JHT

Synoptic Hour Enter Fix Obs, Update Best Track, Initialize Models Synoptic +1 hour Create Consensus, Create Official Forecast Synoptic +2 hours Conference Call, Create Advisories Synoptic +3 hours Issue advisories TC Forecast Process Enter Fix Observations Update BT Model Initialization Create Consensus Forecast Creation Conference Call Create Advisories Issue Advisories A T C F NHC Forecast Process

Seven Proposed Tasks Evaluate wind radii CLIPER algorithms (80%) Implement Monte Carlo wind probabilities in ATCF (90%) Implement GPCE track probabilities –Data retention (90%) –Display (90%) –Evaluation (10%) Streamline imagery overlays (90%) Improve objective best track capability (0%) Automate TC fix entry in NHC operations (90%) Modify ATCF user interface/code to improve efficiency (70%)

Wind Radii CLIPER Evaluation Two statistical models implemented on ATCF –DRCL: Atlantic, E. Pacific, W. Pacific Assumes an idealized vortex, modified by storm motion and initial conditions Developed by DeMaria (NOAA), Knaff (CIRA), … –MRCL: Atlantic only 60 separate equations ( 4 quadrants, 5 taus, 3 radii) Developed by McAdie (NHC)

OFCL was skillful out to about 24 hours. Errors ~ 10% of average radii at 12h, ~ 30% of radii at 72. Avg 34 kt Radii Forecast Errors for 2004 Atlantic Season (06- 16)

OFCL was skillful out to about 24 hours. Errors ~ 15% of average radii at 12h, ~30% at 72. Avg 50 kt Radii Forecast Errors for 2004 Atlantic Season (06- 16)

OFCL was skillful out to about 24 hours. Errors ~ 15% of average radii at 12h, ~ 25% at 72. Avg 64 kt Radii Forecast Errors for 2004 Atlantic Season (06- 16)

Wind Radii CLIPER Conclusions Both models adequate baselines Official forecast has skill to about 24 hrs Similar results for DRCL in EP and WP basins

Monte Carlo Wind Probabilities Messages ZCZC MIAPWSAT4 ALL TTAA00 KNHC DDHHMM HURRICANE TESTPROB WIND SPEED PROBABILITIES NUMBER 1 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL UTC SAT OCT ……….. Breakpoints Grids

Goerss Prediction Consensus Error (GPCE) (24 hour forecast) Goerss Probability Consensus Error (GPCE) computation, display, retention of the error radii complete.

Goerss Prediction Consensus Error (GPCE) (48 hour forecast)

Goerss Prediction Consensus Error (GPCE) (72 hour forecast)

Goerss Prediction Consensus Error (GPCE) (96 hour forecast)

Goerss Prediction Consensus Error (GPCE) (120 hour forecast)

Streamline Satellite Imagery Overlay, Add Products Imagery from NRL TC Page can be retrieved and displayed. RH 4 and NHC firewall issues now fixed. New products can be added on request.

User Interface/Forecaster Efficiency ~ 35 NHC requirements addressed Varying degrees of difficulty ATCF Requirements Lists (2005/2006) –GUI changes –Message changes –New capabilities

Track Function Improvements / Enhancements Positive Impact: improved editing (all Centers)… Best Track editing dialog has been improved by adding wind radii. NHC now best tracks wind radii at the end of the season.

Forecast Function Improvements / Enhancements Positive Impact: time saving (all Centers)… Capability added to allow for zoom/unzoom/full-map snap to while keeping forecast track dialog open. Note – last year you had to quit the dialog, re-zoom and then re-enter the dialog to continue the forecast track preparation

Forecast Function Improvements / Enhancements Positive Impact: time saving and flexibility (all Centers)… Forecast dialog button allows call up of objective aids while preparing the forecast track. Clear Aids button of course clears the currently displayed guidance and quick re-selection of other objective aids is now available. Note – Allows user to quickly alter the displayed objective aids. The procedure to accomplish this last took a bit a cycling through menu options to accomplish this task.

Forecast Function Improvements / Enhancements Positive Impact: flexibility (all Centers)… Open up view Intensity Graph and the user can click on a Tau/Intensity which will link to the Intensity Forecast Tau and make the change there. Click on a (Tau,Intensity) coordinate and it feeds back into the Intensity forecast dialog

Forecast Function Improvements / Enhancements Positive Impact: enhanced display and flexibility (all Centers)… Option button in Forecast wind radii dialog calls an additional dialog display to allow user selection of wind radii at select Taus or select radii values.

Forecast Function Improvements / Enhancements Positive Impact: enhanced display and flexibility (all Centers)… Option to select and deselect the display of wind radii information and/or intensity for objective aids containing that particular information.

Forecast Function Improvements / Enhancements Positive Impact: flexibility (all Centers)… Open up the view Graph (radii quadrant) and the user can click on a Tau/radii value which will link to the Wind radii Forecast Tau and make the change there. Click on a (Tau,radii) coordinate and it feeds back into the wind radii forecast dialog

Forecast Function Improvements / Enhancements Positive Impact: flexibility (all Centers)… Display of objective aids out to 10 days. Internal objective aids merge routine allows forecast hours out to 10 days.

Advisory Improvements / Enhancements Positive Impact: additional information and time savings (NOAA/NWS only)… In the advisory composition dialog, there are now two geography references.

Advisory Improvements / Enhancements In advisory composition, capability to selection of the forecast type (normal, inland, …)as a function of Tau.

Dialogs added for NHC homogeneous fix statistics. Enhancement for Statistics

Enhancement for Objective Aids Toggle on/off thick lines.

Enhancement for Objective Aids Toggle current selected guidance to Current, -06, -12, -24, -36 or –48h

Enhancement for Objective Aids Toggle on/off currently selected aid(s).

Enhancement for Forecast Wind Radii Circle option for wind radii

Enhancement for Forecast Wind Radii Use previous wind radii values button.

Enhancement for Forecast Wind Radii Populate all Taus with Tau 0 wind radii

Enhancement for Forecast Wind Radii Use DeMaria Wind Radii for current selected Tau

Enhancement for Forecast Wind Radii Use DeMaria Wind Radii for ALL Taus.

Delete current Tau wind radii (i.e. zero out all values) Enhancement for Forecast Wind Radii

Conclusions Wind radii CLIPER algorithms evaluated (80%) Monte Carlo wind probabilities in ATCF (90%) GPCE track probabilities –Data retention (90%) –Display (90%) –Evaluation (10%) Imagery overlay capability (90%) Objective best track capability (0%) Automate TC fix entry in NHC operations (90%) Modify ATCF user interface/code to improve efficiency (70%)