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Tropical Depression Boris Forecast Discussion Number 8
2020-06-26 10:47:27| National Hurricane Center (East Pacific)
Issued at 1100 PM HST Thu Jun 25 2020 000 WTPZ43 KNHC 260847 TCDEP3 Tropical Depression Boris Discussion Number 8 NWS National Hurricane Center Miami FL EP032020 1100 PM HST Thu Jun 25 2020 Deep convection associated with Boris has been pulsing the past several hours, but overall there has been a general decrease in coverage and depth of the associated thunderstorm activity. The initial intensity has been lowered to 30 kt based on a 0525Z ASCAT-A pass. The combination of the entrainment of dry mid-level air and marginal sea-surface temperatures is expected to produce a slow weakening trend over the next 72 hours. The new NHC intensity forecast is unchanged from the previous advisory, and calls for Boris to degenerate into a remnant low by 60 h, and dissipate shortly after 72 h. The initial motion estimate is west-northwestward or 290/07 kt. The forecast reasoning remains unchanged from the previous advisory, and the new NHC track forecast is essentially just an update of the previous advisory track. Boris is expected to move west-northwestward during the next day or so while the small cyclone remains to the south of a low- to mid-level ridge. After that time, Boris is forecast to turn westward, then west-southwestward later in the forecast period as the cyclone weakens even further and is steered by the low-level trade wind flow. The updated NHC forecast track is very close to the previous official track forecast, and lies near the southern edge of the guidance envelope. FORECAST POSITIONS AND MAX WINDS INIT 26/0900Z 11.6N 138.5W 30 KT 35 MPH 12H 26/1800Z 11.9N 139.4W 30 KT 35 MPH 24H 27/0600Z 12.2N 140.5W 30 KT 35 MPH 36H 27/1800Z 12.4N 141.9W 30 KT 35 MPH 48H 28/0600Z 12.3N 143.5W 25 KT 30 MPH 60H 28/1800Z 12.0N 145.6W 25 KT 30 MPH...POST-TROP/REMNT LOW 72H 29/0600Z 11.7N 147.6W 20 KT 25 MPH...POST-TROP/REMNT LOW 96H 30/0600Z...DISSIPATED $$ Forecaster Stewart
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