je.st
news
Hurricane Epsilon Forecast Discussion Number 24
2020-10-24 22:56:26| National Hurricane Center (Atlantic)
Issued at 500 PM AST Sat Oct 24 2020 513 WTNT42 KNHC 242056 TCDAT2 Hurricane Epsilon Discussion Number 24 NWS National Hurricane Center Miami FL AL272020 500 PM AST Sat Oct 24 2020 Epsilon continues to exhibit an inner core of deep convection. In fact, only in the past couple of hours has the eye become difficult to locate in satellite images. A larger comma-shaped cloud shield surrounds the circulation, and extends several hundred miles from the center. Epsilon passed over a buoy array this morning where pressures as low as 957.6 mb were recorded. In addition, a pair of ASCAT overpasses late this morning showed a large area of winds of 60-65 kt in the southern semicircle. This data supported an intensity of 70 kt earlier, and the cyclone's appearance has not changed much since then. Therefore, the initial intensity remains 70 kt. The hurricane will likely hold its own for the next 6-12 h as it traverses over waters of about 24 C, while in a fairly favorable atmospheric environment downstream of a mid- to upper-level trough. After 12 h, Epsilon should begin to move over waters of 20 degrees C or less. The combination of the much cooler water temperatures and trough interaction should cause the cyclone to begin an extratropical transition that is forecast to complete by late Sunday. The NHC intensity forecast was nudged a little higher in the 24-48 h time frames due to a slight increase in the guidance, and the latest forecast is very near the HCCA and IVCN consensus models. Regardless of exactly when Epsilon becomes extratropical, it is still expected to remain a very large and powerful cyclone until it merges with a larger low to its north in a few days. Epsilon is accelerating and is now moving northeastward at 19 kt. The cyclone should continue accelerating toward the northeast through Sunday in the mid-latitude westerlies, and could reach a forward motion of about 40 kt toward the northeast or east-northeast by Sunday evening. This fast motion is expected to continue through early next week. The NHC track forecast is little changed from the previous one, and is in good agreement with the tightly clustered track guidance. FORECAST POSITIONS AND MAX WINDS INIT 24/2100Z 39.4N 58.2W 70 KT 80 MPH 12H 25/0600Z 41.5N 54.5W 70 KT 80 MPH 24H 25/1800Z 44.9N 46.7W 65 KT 75 MPH...POST-TROP/EXTRATROP 36H 26/0600Z 48.9N 35.9W 60 KT 70 MPH...POST-TROP/EXTRATROP 48H 26/1800Z 53.5N 25.2W 60 KT 70 MPH...POST-TROP/EXTRATROP 60H 27/0600Z 58.5N 19.1W 60 KT 70 MPH...POST-TROP/EXTRATROP 72H 27/1800Z...DISSIPATED $$ Forecaster Latto
Tags: number
discussion
forecast
hurricane
Category:Transportation and Logistics