ZCZC MIATCDAT5 ALL TTAA00 KNHC DDHHMM Tropical Storm Don Discussion Number 41 NWS National Hurricane Center Miami FL AL052023 900 AM GMT Mon Jul 24 2023 Deep convection has evaporated near Don, though it hasn't been free of convection long enough to declare it post-tropical yet. The initial wind speed is lowered to 40 kt, in concert with the Dvorak estimates that are decreasing as fast as the rules allow. Don should become post-tropical soon and continue to weaken due to persistent cold waters and shear. The storm is moving east-northeastward at about 16 kt, and that general motion is likely to persist until the system dissipates in about a day. All of the global models show Don opening up into a trough in 18-24 hours, so the dissipation phase is moved to that time. No other significant changes were made to the forecast. Don has been a very long-lasting tropical cyclone (including subtropical stages) for the month of July. Preliminary data indicate that the storm is the 5th longest-lasting system on record for the month, just behind Emily of 2005. FORECAST POSITIONS AND MAX WINDS INIT 24/0900Z 47.0N 43.0W 40 KT 45 MPH 12H 24/1800Z 47.9N 39.7W 35 KT 40 MPH...POST-TROPICAL 24H 25/0600Z...DISSIPATED $$ Forecaster Blake NNNN
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Page last modified: Monday, 18-Dec-2023 12:09:12 UTC