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Tropical Depression Chantal Forecast Discussion Number 11
2019-08-23 17:05:03| National Hurricane Center (Atlantic)
Issued at 1100 AM AST Fri Aug 23 2019 000 WTNT44 KNHC 231504 TCDAT4 Tropical Depression Chantal Discussion Number 11 NWS National Hurricane Center Miami FL AL042019 1100 AM AST Fri Aug 23 2019 Chantal is currently producing only small bursts of convection over the northern semicircle, and visible satellite imagery suggests that the low-level circulation is becoming less well defined. The initial intensity is held at 25 kt based on current satellite intensity estimates, but it is possible this is a little generous. A combination of dry air and large-scale subsidence is expected to prevent the return of persistent deep convection, and if current trends continue Chantal could degenerate to a remnant low later today or tonight. The remnant low is expected to dissipate by 72 h, which is unchanged from the previous forecast. The initial motion is now 155/6. There is little change to either the forecast philosophy or the forecast track from the previous advisory. The cyclone is embedded in the subtropical ridge, and the core of the ridge is forecast to shift from southwest to northeast of Chantal during the next couple of days. This evolution should cause Chantal or its remnants to make a clockwise half loop before the system dissipates. Like its predecessor, the new forecast track lies near the various consensus models. FORECAST POSITIONS AND MAX WINDS INIT 23/1500Z 36.6N 40.8W 25 KT 30 MPH 12H 24/0000Z 35.8N 41.0W 25 KT 30 MPH 24H 24/1200Z 35.3N 42.1W 25 KT 30 MPH...POST-TROP/REMNT LOW 36H 25/0000Z 35.3N 43.3W 20 KT 25 MPH...POST-TROP/REMNT LOW 48H 25/1200Z 35.5N 44.1W 20 KT 25 MPH...POST-TROP/REMNT LOW 72H 26/1200Z...DISSIPATED $$ Forecaster Beven
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Tropical Depression Chantal Graphics
2019-08-23 16:37:10| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Fri, 23 Aug 2019 14:37:10 GMT Wind Speed Probabilities last updated Fri, 23 Aug 2019 15:24:23 GMT
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Tropical Depression Chantal Forecast Advisory Number 11
2019-08-23 16:35:38| National Hurricane Center (Atlantic)
Issued at 1500 UTC FRI AUG 23 2019 ZCZC MIATCMAT4 ALL TTAA00 KNHC DDHHMM TROPICAL DEPRESSION CHANTAL FORECAST/ADVISORY NUMBER 11 NWS NATIONAL HURRICANE CENTER MIAMI FL AL042019 1500 UTC FRI AUG 23 2019 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. TROPICAL DEPRESSION CENTER LOCATED NEAR 36.6N 40.8W AT 23/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE SOUTH-SOUTHEAST OR 155 DEGREES AT 6 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1012 MB MAX SUSTAINED WINDS 25 KT WITH GUSTS TO 35 KT. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 36.6N 40.8W AT 23/1500Z AT 23/1200Z CENTER WAS LOCATED NEAR 36.9N 40.9W FORECAST VALID 24/0000Z 35.8N 41.0W MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 24/1200Z 35.3N 42.1W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 25/0000Z 35.3N 43.3W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 25/1200Z 35.5N 44.1W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 26/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 36.6N 40.8W NEXT ADVISORY AT 23/2100Z $$ FORECASTER BEVEN NNNN
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Tropical Depression Chantal Wind Speed Probabilities Number 11
2019-08-23 16:35:11| National Hurricane Center (Atlantic)
Issued at 1500 UTC FRI AUG 23 2019 ZCZC MIAPWSAT4 ALL TTAA00 KNHC DDHHMM TROPICAL DEPRESSION CHANTAL WIND SPEED PROBABILITIES NUMBER 11 NWS NATIONAL HURRICANE CENTER MIAMI FL AL042019 1500 UTC FRI AUG 23 2019 AT 1500Z THE CENTER OF TROPICAL DEPRESSION CHANTAL WAS LOCATED NEAR LATITUDE 36.6 NORTH...LONGITUDE 40.8 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 25 KTS...30 MPH...45 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 12Z 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 12Z FRI 00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE PERIODS TO TO TO TO TO TO TO 00Z SAT 12Z SAT 00Z SUN 12Z SUN 12Z MON 12Z TUE 12Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER BEVEN NNNN
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Summary for Tropical Depression Chantal (AT4/AL042019)
2019-08-23 16:35:01| National Hurricane Center (Atlantic)
...CHANTAL FORECAST TO BECOME A REMNANT LOW BY TONIGHT... As of 11:00 AM AST Fri Aug 23 the center of Chantal was located near 36.6, -40.8 with movement SSE at 7 mph. The minimum central pressure was 1012 mb with maximum sustained winds of about 30 mph.
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