Forecasting Tropical Cyclone Motion over the Northeastem Pacific Ocean by an Analog Scheme
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The Navy's EPANALOG (Northeastern Pacifi.c Analog Tropical Cyclone Tracker) f~recast prog~am is introduced. EP ANALOG selects analog tropical cyclones from a 25-year northeastern Pa~fi.c Ocean history. The selected analog tracks, statistically adjusted for position, vector motio~, an? date ~erences between them and the recent history of the tropical cyclone being forecast, are composited mto a smgle forecast track. Verifications of EPANALOG forecasts to 96 h, as initiated from best-track positions, are shown for randomly selected historical cases with a Monte Carlo simulation of initial position inaccuracies, as well as for forecasts generated from 1973 operational cyclone positions. The latter are intercompared with a homogeneous set of objective persistence and MOHATT forecasts as well as subjective OFFICIAL forecasts for. the 24, 48, and 72 h intervals. The 1973 EPANALOG accuracy is shown to generally excel that of the existent techniques for all forecast intervals tested.
The article of record as published may be found at http://dx.doi.org/10.1175/1520-0493(1975)103<0674:FTCMOT>2.0.CO;2
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The Navy's Analog Scheme for Forecasting Tropical Cyclone Motion over the Northeastern Pacific Ocean Jarrell, Jerry D.; Mauck, Charles J.; Renard, Robert J. (Monterey, California. Naval Postgraduate School, 1975-03); Technical Paper No. 6-75The Navy's EPANALOG (Northeastern Pacific Analog Tropical Cyclone Tracker) forecast program is introduced. EPANALOG selects analog tropical cyclones from a 25-year Northeastern Pacific Ocean history. The selected analog ...
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