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Tropical Storm Marie Forecast Discussion Number 25
2020-10-05 10:32:24| National Hurricane Center (East Pacific)
Issued at 200 AM PDT Mon Oct 05 2020 000 WTPZ43 KNHC 050832 TCDEP3 Tropical Storm Marie Discussion Number 25 NWS National Hurricane Center Miami FL EP182020 200 AM PDT Mon Oct 05 2020 Satellite images show the exposed low-level circulation well to the southwest of any remaining deep convection. ASCAT data, however, came in at 50-55 kt just before 06Z, which is higher than the satellite presentation alone would suggest. The initial wind speed is set to 55 kt on the basis of that data. Marie should weaken during the next few days due to cold waters and strong shear. Models are in very good agreement on a steady weakening, and little change was made to the previous forecast. Remnant low status is expected by 48 hours, and could even happen sooner based on current trends. The storm is moving west-northwestward at about 8 kt this morning. A ridge to the north should steer Marie to the northwest or west-northwest for the next couple of days, then the tropical cyclone is likely to turn westward as it becomes a more shallow feature. Model guidance has generally been adjusting to this scenario, with a mid-latitude trough no longer expected to exert much influence. The new forecast is shifted southward from 48 hours and beyond, near but a little slower than the model consensus. FORECAST POSITIONS AND MAX WINDS INIT 05/0900Z 20.8N 131.1W 55 KT 65 MPH 12H 05/1800Z 21.2N 132.2W 45 KT 50 MPH 24H 06/0600Z 21.8N 133.6W 35 KT 40 MPH 36H 06/1800Z 22.4N 135.2W 30 KT 35 MPH 48H 07/0600Z 22.9N 136.5W 30 KT 35 MPH...POST-TROP/REMNT LOW 60H 07/1800Z 23.2N 137.6W 25 KT 30 MPH...POST-TROP/REMNT LOW 72H 08/0600Z 23.2N 138.5W 25 KT 30 MPH...POST-TROP/REMNT LOW 96H 09/0600Z 23.0N 140.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 120H 10/0600Z...DISSIPATED $$ Forecaster Blake [ more ]
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