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Atlantic Tropical Weather Outlook
2020-09-10 13:44:40| National Hurricane Center (Atlantic)
000 ABNT20 KNHC 101144 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 800 AM EDT Thu Sep 10 2020 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Tropical Storm Paulette, located over the central tropical Atlantic, and on Tropical Storm Rene, located over the eastern tropical Atlantic. A trough of low pressure located just off the coast of North Carolina is producing minimal shower and thunderstorm activity. This system is expected to move inland over eastern North Carolina this afternoon, and therefore significant development is not expected. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...low...near 0 percent. A large area of disorganized showers and thunderstorms centered a couple of hundred miles northeast of the Central Bahamas is associated with a surface trough of low pressure. This system is forecast to move westward, crossing the Bahamas and Florida on Friday and moving into the eastern Gulf of Mexico over the weekend. Upper-level winds are expected to become conducive for some development of this system while it moves slowly west-northwestward over the eastern Gulf of Mexico early next week. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...low...30 percent. Another trough of low pressure has developed over the northeastern Gulf of Mexico and is producing a few disorganized showers and thunderstorms. Some slow development of this system is possible while this system moves westward and then southwestward over the northern and western Gulf of Mexico through early next week. * Formation chance through 48 hours...low...10 percent. * Formation chance through 5 days...low...20 percent. A tropical wave is now moving off the west coast of Africa, producing a large area of showers and thunderstorms. Gradual development of this system is forecast, and a tropical depression is expected to form by this weekend or early next week while the system moves generally westward across the eastern and central tropical Atlantic. * Formation chance through 48 hours...medium...60 percent. * Formation chance through 5 days...high...90 percent. Another tropical wave is forecast to emerge off the west coast of Africa this weekend. Environmental conditions are expected to be conducive for development, and a tropical depression could form over the far eastern tropical Atlantic Ocean early next week while the system moves slowly westward. * Formation chance through 48 hours...low...near 0 percent. * Formation chance through 5 days...medium...40 percent. $$ Forecaster Berg
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Tropical Storm Rene Graphics
2020-09-10 10:40:06| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Thu, 10 Sep 2020 08:40:06 GMT Wind Speed Probabilities last updated Thu, 10 Sep 2020 08:40:06 GMT
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Tropical Storm Paulette Graphics
2020-09-10 10:39:28| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Thu, 10 Sep 2020 08:39:28 GMT Wind Speed Probabilities last updated Thu, 10 Sep 2020 08:39:28 GMT
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Tropical Storm Rene Forecast Discussion Number 13
2020-09-10 10:38:43| National Hurricane Center (Atlantic)
Issued at 500 AM AST Thu Sep 10 2020 000 WTNT43 KNHC 100838 TCDAT3 Tropical Storm Rene Discussion Number 13 NWS National Hurricane Center Miami FL AL182020 500 AM AST Thu Sep 10 2020 Several recent microwave overpasses indicate that Rene continues to be affected by easterly shear, with the low-level center located near the eastern edge of the ongoing bursting convection. Various subjective and objective satellite intensity estimates are in the 35-45 kt range and have changed little since the last advisory. Based on that, the initial intensity remains 35 kt. The initial motion is west-northwestward or 285/9 kt. There is no change in the overall track forecast philosophy. Rene should move generally west-northwestward for the next couple of days, followed by a turn toward the northwest into a weakness in the subtropical ridge partly caused by Tropical Storm Paulette. Late in the forecast period, the track forecast becomes more problematic due to uncertainties in how much ridging will build north of Rene and how close it will be to the larger Paulette. The track guidance during this time shows increasing spread and some westward shift from the previous advisory. The new NHC forecast track is similar to the previous track through 72 h, then it lies to the left of the previous track at 96 and 120 h. However, at these times, it lies to the right of the various consensus models. The shear should gradually diminish during the next 48-60 h, and this should allow Rene to strengthen to or near hurricane strength. After that time, strong west-northwesterly shear is expected to cause gradual weakening despite the cyclone moving over increasing sea surface temperatures. The new official intensity forecast is unchanged from the previous forecast. It lies near the various intensity consensus models through 72 h, but is weaker than those models at 96 and 120 h. FORECAST POSITIONS AND MAX WINDS INIT 10/0900Z 18.2N 34.8W 35 KT 40 MPH 12H 10/1800Z 18.6N 36.2W 40 KT 45 MPH 24H 11/0600Z 19.1N 38.1W 45 KT 50 MPH 36H 11/1800Z 19.8N 40.2W 50 KT 60 MPH 48H 12/0600Z 21.0N 42.2W 60 KT 70 MPH 60H 12/1800Z 22.4N 44.1W 65 KT 75 MPH 72H 13/0600Z 24.1N 45.7W 60 KT 70 MPH 96H 14/0600Z 27.0N 47.5W 50 KT 60 MPH 120H 15/0600Z 28.6N 49.0W 40 KT 45 MPH $$ Forecaster Beven
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Tropical Storm Rene Wind Speed Probabilities Number 13
2020-09-10 10:38:06| National Hurricane Center (Atlantic)
Issued at 0900 UTC THU SEP 10 2020 000 FONT13 KNHC 100838 PWSAT3 TROPICAL STORM RENE WIND SPEED PROBABILITIES NUMBER 13 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182020 0900 UTC THU SEP 10 2020 AT 0900Z THE CENTER OF TROPICAL STORM RENE WAS LOCATED NEAR LATITUDE 18.2 NORTH...LONGITUDE 34.8 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 35 KTS...40 MPH...65 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 THU 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 THU 18Z THU 06Z FRI 18Z FRI 06Z SAT 06Z SUN 06Z MON PERIODS TO TO TO TO TO TO TO 18Z THU 06Z FRI 18Z FRI 06Z SAT 06Z SUN 06Z MON 06Z TUE FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT $$ FORECASTER BEVEN
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