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Post-Tropical Cyclone Alpha

UPDATED
300 AM GMT Sat Sep 19 2020
LOCATION
1090 MI ENE OF THE AZORES
WINDS
30 MPH
PRESSURE
1005 MB
MOVING
NE AT 16 MPH

SHORT-LIVED ALPHA BECOMES A REMNANT LOW OVER THE DISTRICT OF

VISEU PORTUGAL..

ALERTS
HAZARDS
SUMMARY
DISCUSSION

There are no coastal tropical cyclone watches or warnings in effect.

Interests in Portugal should monitor the progress of Alpha. Additional information on this system can be found in products from the Portuguese Institute for Sea and Atmosphere at www.ipma.pt.


WIND...Information on wind hazards from Alpha can be found in products from the Portuguese Institute for Sea and Atmosphere at www.ipma.pt.

RAINFALL...Alpha is expected to produce storm totals of 1 to 2 inches of rainfall, with isolated amounts of 3 inches over the northern portion of Portugal and into westcentral Spain before rain tapers off later today.


At 300 AM GMT (0300 UTC), the center of PostTropical Cyclone Alpha was located near latitude 40.9 North, longitude 6.9 West. The posttropical cyclone is moving toward the northeast near 16 mph (26 km/h), and this general motion is expected to continue during the next 12 hours or so. Alpha should move across northern Portugal and Spain before dissipating later today. Maximum sustained winds have decreased to near 30 mph (45 km/h) with higher gusts. The remnant low is expected to dissipate by Saturday night.

The estimated minimum central pressure is 1005 mb (29.68 inches).


METEOSAT imagery, IPMA radar data, and surface observations indicate that Alpha has degenerated to a post-tropical remnant low just a few miles to the southeast of Viseu, Portugal. Therefore, this the last NHC advisory. Surface wind data support an initial intensity of 25 kt. The rapidly deteriorating small remnant low is expected to move generally toward the northeast at about 14 kt for the next 6 to 12 hours before dissipating over northern Spain by Saturday night. The NHC forecast track is basically an update of the previous advisory and lies between the tightly clustered deterministic guidance. Additional information on the hazards from this system can be found in products from the Portuguese Institute for Sea and Atmosphere at www.ipma.pt.

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