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Subtropical Storm Alpha Public Advisory Number 2
2020-09-18 22:51:45| National Hurricane Center (Atlantic)
Issued at 900 PM GMT Fri Sep 18 2020 000 WTNT34 KNHC 182051 TCPAT4 BULLETIN Subtropical Storm Alpha Advisory Number 2 NWS National Hurricane Center Miami FL AL242020 900 PM GMT Fri Sep 18 2020 ...ALPHA MAKES LANDFALL IN PORTUGAL... ...EXPECTED TO DISSIPATE ON SATURDAY... SUMMARY OF 900 PM GMT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...40.4N 8.4W ABOUT 120 MI...195 KM NNE OF LISBON PORTUGAL MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES WATCHES AND WARNINGS -------------------- 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 ---------------------- At 900 PM GMT (2100 UTC), the center of Subtropical Storm Alpha was located near latitude 40.4 North, longitude 8.4 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. Alpha should move across northern Portugal and Spain before dissipating on Saturday. Maximum sustained winds are near 45 mph (75 km/h) with higher gusts. The storm should weaken into a depression overnight and a remnant low pressure area on Saturday. Winds of 40 mph extend outward up to 35 miles (55 km) from the center. The estimated minimum central pressure is 998 mb (29.47 inches). HAZARDS AFFECTING LAND ---------------------- 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. NEXT ADVISORY ------------- Next complete advisory at 300 AM GMT. $$ Forecaster Blake
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