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Hurricane ANDRES Forecast Discussion Number 18
2015-06-01 16:52:54| National Hurricane Center (East Pacific)
Issued at 800 AM PDT MON JUN 01 2015 000 WTPZ41 KNHC 011452 TCDEP1 HURRICANE ANDRES DISCUSSION NUMBER 18 NWS NATIONAL HURRICANE CENTER MIAMI FL EP012015 800 AM PDT MON JUN 01 2015 Enhanced infrared B-D curve imagery indicates that the eye temperature has cooled considerably this morning to about 7 Celsius, which results in a decrease of the subjective satellite intensity estimates to T6.0 (115 kt). Based on a compromise of these estimates and the objective data-T of 6.7 (132kt), the initial intensity is lowered slightly to 120 kt. Earlier IR satellite imagery showed that Andres peaked around 0900 UTC at an estimated 130 kt and it now appears that the expected weakening trend has begun, likely due to the intruding stable atmospheric marine layer from the northwest. Andres should be moving over cooler waters during the next 24 hours, which should result in a more rapid rate of weakening. The aforementioned stable air mass, cooler water, and increasing southwesterly shear by day 3, should cause the cyclone to become a tropical storm in 48 hours, and a remnant low in 96 hours or less. The hurricane has made its expected turn toward the west-northwest and is now moving at 285/5kt. Andres is forecast to turn toward the northwest in about 48 hours as the subtropical ridge begins to weaken with the approach of a deep-layer mid-latitude trough from the northwest. By day 3, the approaching trough is expected to result in a gradual turn toward the north and northeast but with a significant reduction is forward speed because of the sheared, shallow structure of the cyclone. The official forecast is similar to the previous advisory and is close to the GFS/ECMWF consensus, GFEX. FORECAST POSITIONS AND MAX WINDS INIT 01/1500Z 15.7N 120.3W 120 KT 140 MPH 12H 02/0000Z 16.5N 121.4W 105 KT 120 MPH 24H 02/1200Z 17.5N 123.0W 85 KT 100 MPH 36H 03/0000Z 18.5N 124.6W 65 KT 75 MPH 48H 03/1200Z 19.2N 125.6W 50 KT 60 MPH 72H 04/1200Z 20.3N 125.6W 35 KT 40 MPH 96H 05/1200Z 20.8N 125.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 120H 06/1200Z 20.8N 124.7W 20 KT 25 MPH...POST-TROP/REMNT LOW $$ Forecaster Roberts
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