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Atlantic Tropical Cyclone Discussion

151
WTNT42 KNHC 170834
TCDAT2

TROPICAL DEPRESSION BILL DISCUSSION NUMBER 6
NWS NATIONAL HURRICANE CENTER MIAMI FL AL022015
400 AM CDT WED JUN 17 2015

While radar data show that Bill is maintaining a good
convective banding structure, surface observations indicate that
the cyclone has weakened to a tropical depression over central
Texas. The initial intensity is 30 kt, with these winds occurring
in rainbands near and east of the center. The large-scale models
suggest that only slow weakening will occur during the next 24-36
hours, and Bill is likely to remain a tropical cyclone until the
center moves into eastern Oklahoma on Thursday. After that, the
cyclone is expected to degenerate to a remnant low, with the low
being absorbed by a frontal system over the eastern United States
in about 96 hours.

The initial motion is 360/11. Bill is expected to moved northward
for the next 12-24 hours on the west side of the subtropical ridge.
Subsequently, the cyclone should turn northeastward as it enters
the westerlies. The track model guidance is in good agreement with
this scenario, and the new forecast track lies close to the model
consensus.

The main hazard from Bill is expected to be heavy rainfall and
flooding across portions of eastern Texas and eastern Oklahoma
over the next day or two. Please see products from your local
National Weather Service office for more information on the flood
threat.

This is the last advisory on Bill issued by the National Hurricane
Center. Future information on this system can be found in Public
Advisories issued by the Weather Prediction Center beginning at 10
AM CDT, under AWIPS header TCPAT2, WMO header WTNT32 KWNH, and on
the web at http://www.hpc.ncep.noaa.gov/tropical/.


FORECAST POSITIONS AND MAX WINDS

INIT 17/0900Z 31.0N 97.1W 30 KT 35 MPH...INLAND
12H 17/1800Z 32.6N 97.2W 30 KT 35 MPH...INLAND
24H 18/0600Z 34.3N 96.8W 25 KT 30 MPH...INLAND
36H 18/1800Z 35.5N 95.2W 25 KT 30 MPH...POST-TROP/INLAND
48H 19/0600Z 36.5N 93.6W 20 KT 25 MPH...POST-TROP/INLAND
72H 20/0600Z 38.5N 89.5W 20 KT 25 MPH...POST-TROP/INLAND
96H 21/0600Z...DISSIPATED

$$
Forecaster Beven


Bulletins, Forecasts and Observations are courtesy of Honolulu National Weather Service Forecast Office



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