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Subtropical Storm Alpha Forms Near the Coast of Portugal; Should Be a Short-Lived Storm

| September 18, 2020 @ 11:43 am

SUMMARY OF 430 PM GMT…1630 UTC…INFORMATION
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LOCATION…39.9N 9.3W
ABOUT 75 MI…125 KM N OF LISBON PORTUGAL
MAXIMUM SUSTAINED WINDS…50 MPH…85 KM/H
PRESENT MOVEMENT…NE OR 35 DEGREES AT 17 MPH…28 KM/H
MINIMUM CENTRAL PRESSURE…999 MB…29.50 INCHES

WATCHES AND WARNINGS
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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.

DISCUSSION AND OUTLOOK
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At 430 PM GMT (1630 UTC), the center of Subtropical Storm Alpha was located near latitude 39.9 North, longitude 9.3 West. The storm is moving toward the northeast near 17 mph (28 km/h), and this general motion is expected during the next day or so before dissipation. Alpha should move across the coast of west-central Portugal during the next couple of days.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Little change in strength is expected before landfall, with rapid weakening over land through the weekend.

Alpha is a small storm. Winds of 40 mph extend outward up to 35 miles (55 km) from the center.

The estimated minimum central pressure is 999 MB (29.50 inches).

HAZARDS AFFECTING LAND
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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 1 to 2 inches (25 to 50 mm) of rainfall, with isolated amounts of 3 inches (75 mm) over the northern portion of Portugal and into west-central Spain through Saturday morning.

Category: ALL POSTS, Tropical

About the Author ()

Scott Martin is an operational meteorologist, professional graphic artist, musician, husband, and father. Not only is Scott a member of the National Weather Association, but he is also the Central Alabama Chapter of the NWA president. Scott is also the co-founder of Racecast Weather, which provides forecasts for many racing series across the USA. He also supplies forecasts for the BassMaster Elite Series events including the BassMaster Classic.

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