Tropical Storm Lowell Forecast Discussion
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000 WTPZ42 KNHC 280835 TCDEP2 Tropical Storm Lowell Discussion Number 3 NWS National Hurricane Center Miami FL EP122026 1100 PM HST Thu Aug 27 2026 Lowell continues to produce a persistent area of deep convection on the southwest side of its circulation, and banding features are gradually becoming better organized west of the center. The latest satellite intensity estimates generally range from 35 to 45 kt, and based on those values, the initial wind speed is nudged up to 40 kt for this advisory. The storm appears to be experiencing some northeasterly vertical wind shear based on its convective pattern. The initial motion estimate remains east-northeastward, or 65 degrees at 5 kt, and that general slow motion could continue through the day. However, a turn to the west or west-northwest with an increase in forward speed is expected on Saturday as a ridge strengthens to the north of the system. Although the models generally agree on this overall pattern evolution, there remains considerable spread in the location of the turn and forward speed of the storm after it turns westward. The NHC track forecast leans toward the faster side of the guidance envelope, but is not as fast as the Google DeepMind and HCCA solutions, which have had a slight fast bias on storms in the eastern and central Pacific so far this season. Lowell is expected to be in generally favorable environmental conditions for the next several days, with warm sea-surface temperatures, light to moderate easterly wind shear and relatively moist air. However, strengthening could be slow in the short term given its asymmetric structure. Most of the more reliable models show at least steady strengthening throughout the forecast period, and it seems likely that Lowell will reach hurricane strength over the weekend with additional intensification continuing into early next week. The NHC intensity forecast is similiar to the previous one and lies near the high end of the guidance in the short term and closer to the middle of the envelope at the latter forecast times. FORECAST POSITIONS AND MAX WINDS INIT 28/0900Z 11.7N 133.0W 40 KT 45 MPH 12H 28/1800Z 12.1N 132.8W 45 KT 50 MPH 24H 29/0600Z 12.3N 133.6W 45 KT 50 MPH 36H 29/1800Z 12.5N 134.8W 50 KT 60 MPH 48H 30/0600Z 12.7N 136.4W 55 KT 65 MPH 60H 30/1800Z 12.9N 138.1W 65 KT 75 MPH 72H 31/0600Z 13.1N 139.8W 75 KT 85 MPH 96H 01/0600Z 13.5N 143.2W 85 KT 100 MPH 120H 02/0600Z 13.9N 146.3W 95 KT 110 MPH $$ Forecaster Cangialosi