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Tropical Depression Twenty-one Graphics
2020-09-14 11:49:08| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Mon, 14 Sep 2020 09:49:08 GMT Wind Speed Probabilities last updated Mon, 14 Sep 2020 09:49:08 GMT
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Tropical Depression Twenty-one Wind Speed Probabilities Number 1
2020-09-14 11:48:28| National Hurricane Center (Atlantic)
Issued at 1000 UTC MON SEP 14 2020 000 FONT11 KNHC 140948 PWSAT1 TROPICAL DEPRESSION TWENTY-ONE SPECIAL WIND SPEED PROBABILITIES NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL AL212020 1000 UTC MON SEP 14 2020 AT 1000Z THE CENTER OF TROPICAL DEPRESSION TWENTY-ONE WAS LOCATED NEAR LATITUDE 18.5 NORTH...LONGITUDE 28.3 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 30 KTS...35 MPH...55 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 06Z MON 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 06Z MON 18Z MON 06Z TUE 18Z TUE 06Z WED 06Z THU 06Z FRI PERIODS TO TO TO TO TO TO TO 18Z MON 06Z TUE 18Z TUE 06Z WED 06Z THU 06Z FRI 06Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER STEWART
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Summary for Tropical Depression Twenty-one (AT1/AL212020)
2020-09-14 11:47:57| National Hurricane Center (Atlantic)
...NEW TROPICAL DEPRESSION FORMS OVER THE FAR EASTERN TROPICAL ATLANTIC... ...EXPECTED TO BE SHORT-LIVED... As of 9:00 AM CVT Mon Sep 14 the center of Twenty-one was located near 18.5, -28.3 with movement N at 6 mph. The minimum central pressure was 1009 mb with maximum sustained winds of about 35 mph.
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Tropical Depression Twenty-one Public Advisory Number 1
2020-09-14 11:47:57| National Hurricane Center (Atlantic)
Issued at 900 AM CVT Mon Sep 14 2020 000 WTNT31 KNHC 140947 TCPAT1 BULLETIN Tropical Depression Twenty-One Special Advisory Number 1 NWS National Hurricane Center Miami FL AL212020 900 AM CVT Mon Sep 14 2020 ...NEW TROPICAL DEPRESSION FORMS OVER THE FAR EASTERN TROPICAL ATLANTIC... ...EXPECTED TO BE SHORT-LIVED... SUMMARY OF 900 AM CVT...1000 UTC...INFORMATION ---------------------------------------------- LOCATION...18.5N 28.3W ABOUT 330 MI...535 KM WNW OF THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...N OR 355 DEGREES AT 6 MPH...9 KM/H MINIMUM CENTRAL PRESSURE...1009 MB...29.80 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 900 AM CVT (1000 UTC), the center of newly formed Tropical Depression Twenty-One was located near latitude 18.5 North, longitude 28.3 West. The depression is moving toward the north near 6 mph (9 km/h) and this motion is forecast to continue into this afternoon, followed by a turn toward the northwest tonight, with a west-northwestward motion expected on Tuesday and Wednesday. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Some slight strengthening could occur today and tonight, and the depression could briefly become a tropical storm during that time. Weakening is expected to begin by Tuesday night, if not sooner, and continue into Wednesday and Thursday. The estimated minimum central pressure is 1009 mb (29.80 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 200 PM CVT. $$ Forecaster Stewart/Beven
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Tropical Depression Twenty-one Forecast Advisory Number 1
2020-09-14 11:47:57| National Hurricane Center (Atlantic)
Issued at 1000 UTC MON SEP 14 2020 000 WTNT21 KNHC 140947 TCMAT1 TROPICAL DEPRESSION TWENTY-ONE SPECIAL FORECAST/ADVISORY NUMBER 1 NWS NATIONAL HURRICANE CENTER MIAMI FL AL212020 1000 UTC MON SEP 14 2020 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 18.5N 28.3W AT 14/1000Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE NORTH OR 355 DEGREES AT 5 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1009 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. 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 18.5N 28.3W AT 14/1000Z AT 14/0600Z CENTER WAS LOCATED NEAR 18.2N 28.2W FORECAST VALID 14/1800Z 19.6N 28.6W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 40NE 40SE 0SW 0NW. FORECAST VALID 15/0600Z 20.5N 29.6W MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 15/1800Z 21.3N 30.9W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 16/0600Z 21.9N 32.8W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 16/1800Z 22.4N 34.8W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 17/0600Z 22.8N 36.9W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. 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 18/0600Z 23.4N 41.0W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. OUTLOOK VALID 19/0600Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 18.5N 28.3W NEXT ADVISORY AT 14/1500Z $$ FORECASTER STEWART/BEVEN
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