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Tropical Depression Ten Forecast Discussion Number 2
2020-08-01 04:48:41| National Hurricane Center (Atlantic)
Issued at 200 AM CVT Sat Aug 01 2020 000 WTNT45 KNHC 010248 TCDAT5 Tropical Depression Ten Discussion Number 2 NWS National Hurricane Center Miami FL AL102020 200 AM CVT Sat Aug 01 2020 The small depression maintained a large burst of convection in its northwest quadrant for several hours after the last advisory, though cloud tops have warmed steadily since around 00Z. An ASCAT-B pass near 2300 UTC showed max winds near 35 kt, but these winds coincided with the coldest cloud tops in Meteosat imagery at that time, indicating they may have been rain inflated. Data from ASCAT-C valid about 40 minutes earlier only showed peak winds closer to 30 kt, also near the deepest convection. The highest wind retrievals in the east half of the circulation, where you would often expect the highest winds for a system moving north or northwest, were between 25 and 30 kt in both passes. Subjective Dvorak intensity estimates were 30 kt and 25 kt from TAFB and SAB, respectively, at 00Z. It is possible that the cyclone briefly had tropical-storm-strength winds at one point, but given the observed warming of cloud tops since 00Z, the intensity is maintained at 30 kt for this advisory. There is no real change to the forecast reasoning. The depression is moving northwestward and a turn toward the west-northwest is expected later today as it moves around a larger cyclonic gyre. Conditions do not appear to be favorable for any strengthening, and the dynamical models indicate that deep convection will dissipate later today due to cool underlying SSTs and a drier surrounding environment. The NHC track and intensity forecast is based on the TVCA and IVCN consensus aids and has not been changed significantly from the previous advisory. FORECAST POSITIONS AND MAX WINDS INIT 01/0300Z 17.1N 21.1W 30 KT 35 MPH 12H 01/1200Z 18.4N 22.5W 30 KT 35 MPH 24H 02/0000Z 19.3N 25.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 02/1200Z 20.0N 28.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 48H 03/0000Z...DISSIPATED $$ Forecaster Zelinsky
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