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Tropical Storm Beta Forecast Advisory Number 5
2020-09-18 22:52:49| National Hurricane Center (Atlantic)
Issued at 2100 UTC FRI SEP 18 2020 000 WTNT22 KNHC 182052 TCMAT2 TROPICAL STORM BETA FORECAST/ADVISORY NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL AL222020 2100 UTC FRI SEP 18 2020 INTERESTS ALONG THE WESTERN GULF OF MEXICO COAST SHOULD MONITOR THE PROGRESS OF BETA. STORM SURGE AND TROPICAL STORM OR HURRICANE WATCHES WILL LIKELY BE REQUIRED FOR PORTIONS OF THE WESTERN GULF COAST TONIGHT OR ON SATURDAY. TROPICAL STORM CENTER LOCATED NEAR 24.3N 93.1W AT 18/2100Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 25 DEGREES AT 8 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1004 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 90NE 0SE 0SW 80NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 24.3N 93.1W AT 18/2100Z AT 18/1800Z CENTER WAS LOCATED NEAR 23.9N 93.3W FORECAST VALID 19/0600Z 25.1N 92.9W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 90NE 40SE 30SW 90NW. FORECAST VALID 19/1800Z 25.9N 93.0W MAX WIND 45 KT...GUSTS 55 KT. 34 KT...100NE 60SE 40SW 90NW. FORECAST VALID 20/0600Z 26.1N 93.7W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 40NE 40SE 0SW 30NW. 34 KT...130NE 70SE 70SW 90NW. FORECAST VALID 20/1800Z 26.3N 94.6W MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 40NE 40SE 30SW 30NW. 34 KT...140NE 90SE 80SW 100NW. FORECAST VALID 21/0600Z 26.5N 95.5W MAX WIND 65 KT...GUSTS 80 KT. 50 KT... 40NE 40SE 30SW 40NW. 34 KT...150NE 90SE 80SW 100NW. FORECAST VALID 21/1800Z 26.8N 96.3W MAX WIND 65 KT...GUSTS 80 KT. 50 KT... 50NE 40SE 30SW 50NW. 34 KT...150NE 80SE 80SW 100NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 22/1800Z 27.5N 96.5W MAX WIND 60 KT...GUSTS 75 KT. OUTLOOK VALID 23/1800Z 28.5N 96.0W MAX WIND 55 KT...GUSTS 65 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 24.3N 93.1W NEXT ADVISORY AT 19/0300Z $$ FORECASTER BEVEN
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Subtropical Storm Alpha Graphics
2020-09-18 22:52:29| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Fri, 18 Sep 2020 20:52:29 GMT Wind Speed Probabilities last updated Fri, 18 Sep 2020 20:52:29 GMT
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Subtropical Storm Alpha Wind Speed Probabilities Number 2
2020-09-18 22:52:15| National Hurricane Center (Atlantic)
Issued at 2100 UTC FRI SEP 18 2020 660 FONT14 KNHC 182052 PWSAT4 SUBTROPICAL STORM ALPHA WIND SPEED PROBABILITIES NUMBER 2 NWS NATIONAL HURRICANE CENTER MIAMI FL AL242020 2100 UTC FRI SEP 18 2020 AT 2100Z THE CENTER OF SUBTROPICAL STORM ALPHA WAS LOCATED NEAR LATITUDE 40.4 NORTH...LONGITUDE 8.4 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 40 KTS...45 MPH...75 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 18Z FRI AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 18Z FRI 06Z SAT 18Z SAT 06Z SUN 18Z SUN 18Z MON 18Z TUE PERIODS TO TO TO TO TO TO TO 06Z SAT 18Z SAT 06Z SUN 18Z SUN 18Z MON 18Z TUE 18Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER BLAKE
Summary for Subtropical Storm Alpha (AT4/AL242020)
2020-09-18 22:51:45| National Hurricane Center (Atlantic)
...ALPHA MAKES LANDFALL IN PORTUGAL... ...EXPECTED TO DISSIPATE ON SATURDAY... As of 9:00 PM GMT Fri Sep 18 the center of Alpha was located near 40.4, -8.4 with movement NE at 17 mph. The minimum central pressure was 998 mb with maximum sustained winds of about 45 mph.
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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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