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Tropical Storm Kevin Forecast Discussion Number 7
2021-08-09 04:34:11| National Hurricane Center (East Pacific)
Issued at 900 PM MDT Sun Aug 08 2021 000 WTPZ41 KNHC 090234 TCDEP1 Tropical Storm Kevin Discussion Number 7 NWS National Hurricane Center Miami FL EP112021 900 PM MDT Sun Aug 08 2021 Satellite images indicate that Kevin has been relatively steady in strength over the past several hours. Deep convection is most organized near the center and over the western half of the circulation, with microwave images showing the center partially exposed. This asymmetric cloud pattern is due to about 15 kt of northeasterly wind shear. The Dvorak classifications from TAFB, SAB, and CIMSS at the University of Wisconsin are largely unchanged and range from 45 to 55 kt, and based on that data the initial intensity is once again held at 50 kt. Kevin is moving westward at a relatively slow pace of 7 kt. There has been little change in the track forecast rationale. A general west-northwestward motion is expected during the next several days as Kevin moves in the flow on the southwest side of a mid-level ridge. The track models have trended a little to the north this cycle, and the NHC track forecast has been nudged in that direction. Despite being over warm 29 degree C waters and embedded in a moist air mass, northeasterly shear has limited the amount of strengthening during the past day or so. Since the shear is expected to continue, Kevin is only forecast to strengthen slowly during the next day or two. After that time, however, progressively cooler waters and a more stable environment should cause a gradual decay. The NHC intensity forecast is a little lower than the previous one, following the HCCA and IVCN consensus aids. The cyclone will likely become a remnant low by the end of the forecast period when it is expected to be over cool 22 C waters. FORECAST POSITIONS AND MAX WINDS INIT 09/0300Z 16.0N 110.3W 50 KT 60 MPH 12H 09/1200Z 16.4N 111.3W 55 KT 65 MPH 24H 10/0000Z 17.2N 112.7W 60 KT 70 MPH 36H 10/1200Z 18.0N 114.4W 65 KT 75 MPH 48H 11/0000Z 18.7N 115.8W 65 KT 75 MPH 60H 11/1200Z 19.6N 117.5W 60 KT 70 MPH 72H 12/0000Z 20.6N 119.6W 50 KT 60 MPH 96H 13/0000Z 22.1N 123.5W 40 KT 45 MPH 120H 14/0000Z 23.5N 128.1W 30 KT 35 MPH...POST-TROP/REMNT LOW $$ Forecaster Cangialosi
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