Official Discussion issued by the National Hurricane Center

Rene (AL182020) DATA RELEASED: 9/13/2020 3:00:00 AM UTC

Copy of official data

Tropical Depression Rene Discussion Number  24
NWS National Hurricane Center Miami FL       AL182020
1100 PM AST Sat Sep 12 2020

Satellite images indicate that a band of convection has recently 
increased on the western side of the circulation, otherwise the 
center remains mostly exposed.  The initial wind speed is reduced to 
25 kt based on scatterometer data.  The small cyclone is likely to 
gradually spin down due to persistent moderate shear and a fairly 
dry environment.  The hostile conditions are not likely to change 
too much, so Rene is forecast to lose all convection in a day or two 
and become a remnant low.  The new NHC intensity forecast is lower 
than the previous one due to the weaker initial intensity and 
follows the latest global model consensus.

The depression is moving northwestward at about 11 kt. A blocking 
ridge of high pressure is forecast to build to the northwest or 
Rene, causing the cyclone to slow down and then turn westward and 
west-southwestward early next week. The guidance is similar to the 
previous package, and no significant track changes were made to the 
official NHC forecast. The forecast still might hold onto the 
circulation too long, and the remnant low could dissipate into a 
trough of low pressure sooner than indicated below.


INIT  13/0300Z 25.3N  46.4W   25 KT  30 MPH
12H  13/1200Z 26.4N  47.3W   25 KT  30 MPH
24H  14/0000Z 27.3N  48.1W   25 KT  30 MPH
36H  14/1200Z 27.4N  48.6W   20 KT  25 MPH...POST-TROP/REMNT LOW
48H  15/0000Z 27.2N  49.3W   20 KT  25 MPH...POST-TROP/REMNT LOW
60H  15/1200Z 26.5N  50.5W   20 KT  25 MPH...POST-TROP/REMNT LOW
72H  16/0000Z...DISSIPATED

Forecaster Blake