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Post-Tropical Cyclone IDA Forecast Discussion Number 38
2015-09-27 22:32:57| National Hurricane Center (Atlantic)
Issued at 500 PM AST SUN SEP 27 2015 000 WTNT45 KNHC 272032 TCDAT5 POST-TROPICAL CYCLONE IDA DISCUSSION NUMBER 38 NWS NATIONAL HURRICANE CENTER MIAMI FL AL102015 500 PM AST SUN SEP 27 2015 Ida has lacked organized deep convection for about 15 hours now, and it no longer meets the convective requirement of a tropical cyclone. Therefore, Ida is classified as a remnant low and this is the last advisory issued by the National Hurricane Center on this system. The circulation of the low has become increasingly elongated today, due to the interaction with a cold front a few hundred n mi to the north of the cyclone. The front is expected to move closer to the remnant low tonight and Monday, and this will likely cause the cyclone to open up into a trough within the next few days. The low is moving slowly westward. A faster west-southwestward to westward motion is expected during the next couple of days as a low to mid-level ridge builds to the north of the system. The latest official track forecast lies near the middle of the guidance envelope. Additional information on the remnants of Ida can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and available on the Web at http://www.opc.ncep.noaa.gov/shtml/NFDHSFAT1.shtml. FORECAST POSITIONS AND MAX WINDS INIT 27/2100Z 24.5N 48.7W 25 KT 30 MPH...POST-TROP/REMNT LOW 12H 28/0600Z 24.1N 50.2W 25 KT 30 MPH...POST-TROP/REMNT LOW 24H 28/1800Z 23.9N 52.5W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 29/0600Z 24.0N 55.0W 20 KT 25 MPH...POST-TROP/REMNT LOW 48H 29/1800Z 24.5N 57.2W 20 KT 25 MPH...POST-TROP/REMNT LOW 72H 30/1800Z...DISSIPATED $$ Forecaster Cangialosi
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