je.st
news
Tag: remnants
Remnants of Fred Forecast Discussion Number 22
2021-08-15 04:48:46| National Hurricane Center (Atlantic)
Issued at 1100 PM EDT Sat Aug 14 2021 000 WTNT41 KNHC 150248 TCDAT1 Remnants Of Fred Discussion Number 22 NWS National Hurricane Center Miami FL AL062021 1100 PM EDT Sat Aug 14 2021 Deep convection has increased in association with the remnants of Fred this evening with some lose banding noted in both satellite imagery and radar data from Key West. Satellite imagery and surface observations also indicate that the circulation has become a little better defined since this afternoon, but the system still lacks a well-defined center. Therefore, the system has not regained tropical cyclone status yet. The initial intensity remains 30 kt and is based on a few buoy and C-MAN observations over the southeastern Gulf of Mexico and the Lower Florida Keys which have reported peak winds of 25-30 kt over the past several hours. The C-MAN site on Sand Key has reported slightly stronger winds, but that site is elevated. The system has moved little during the past several hours, and since it lacks a well-defined center, the initial motion estimate is a highly uncertain 300/08 kt. The disturbance is expected to begin a more definitive northwestward motion overnight or Sunday morning as it moves around the western extent of a subtropical ridge over the western Atlantic. The system is forecast to turn northward on Monday as it nears the northern Gulf of coast. Although the track guidance is in good agreement on the overall motion scenario, there is some cross-track spread that appears to be related to where the center re-forms in the short term. Overall there was some eastward shift to the guidance envelope and the official forecast was nudged in that direction, but it still lies to the west of the consensus aids. The NHC track forecast is closest to the GFEX track, which is a consensus of the typically reliable GFS and ECMWF models. The upper-level trough over the eastern Gulf of Mexico is forecast to weaken and move northward during the next 12-24 hours. This should allow for a somewhat more conducive environment for the system to regain tropical cyclone status and strengthen on Sunday. However, continued moderate southwesterly vertical wind shear is likely to hinder significant development, and the NHC intensity forecast only calls for gradual strengthening through 36-48 hours. After landfall, the system is forecast to weaken rapidly and the global models indicate the circulation will dissipate by 96 hours. Although no coastal watches or warnings are currently in effect, the National Hurricane Center will continue 6-hourly advisories on the remnants of Fred in anticipation of re-development. Watches are very likely to be required for a portion of the northern Gulf coast early Sunday, and warnings may be required later in the day. KEY MESSAGES: 1. Today through Monday, heavy rainfall could lead to areal, urban, and small stream flooding impacts, and cause new and renewed river flooding across southern Florida, the Big Bend, and Panhandle. From Monday onward, heavy rain and flood impacts could extend into other portions of the Southeast and into the southern and central Appalachians and Piedmont as Fred interacts with a front in the area. 2. Fred is forecast to regenerate as a tropical cyclone over the Gulf of Mexico on Sunday, and bring a risk of tropical storm conditions to portions of the northern Gulf coast, especially from coastal Mississippi to the Florida Panhandle beginning on Monday. Watches will likely be required for a portion of this area early Sunday, and warnings may be required later in the day. FORECAST POSITIONS AND MAX WINDS INIT 15/0300Z 23.8N 84.3W 30 KT 35 MPH 12H 15/1200Z 25.3N 85.7W 35 KT 40 MPH...TROPICAL CYCLONE 24H 16/0000Z 26.8N 86.9W 40 KT 45 MPH 36H 16/1200Z 28.3N 87.8W 45 KT 50 MPH 48H 17/0000Z 29.7N 88.0W 45 KT 50 MPH 60H 17/1200Z 31.4N 87.9W 30 KT 35 MPH...INLAND 72H 18/0000Z 33.1N 87.6W 20 KT 25 MPH...INLAND 96H 19/0000Z...DISSIPATED $$ Forecaster Brown
Tags: number
discussion
fred
forecast
Remnants of Fred Wind Speed Probabilities Number 22
2021-08-15 04:48:46| National Hurricane Center (Atlantic)
Issued at 0300 UTC SUN AUG 15 2021 000 FONT11 KNHC 150248 PWSAT1 REMNANTS OF FRED WIND SPEED PROBABILITIES NUMBER 22 NWS NATIONAL HURRICANE CENTER MIAMI FL AL062021 0300 UTC SUN AUG 15 2021 AT 0300Z THE REMNANTS OF FRED WERE LOCATED NEAR LATITUDE 23.8 NORTH ...LONGITUDE 84.3 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 00Z SUN 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 00Z SUN 12Z SUN 00Z MON 12Z MON 00Z TUE 00Z WED 00Z THU PERIODS TO TO TO TO TO TO TO 12Z SUN 00Z MON 12Z MON 00Z TUE 00Z WED 00Z THU 00Z FRI FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT VENICE FL 34 X 2( 2) X( 2) 1( 3) X( 3) X( 3) X( 3) CEDAR KEY FL 34 X 2( 2) 1( 3) X( 3) 1( 4) X( 4) X( 4) TALLAHASSEE FL 34 X X( X) 1( 1) X( 1) 2( 3) X( 3) X( 3) APALACHICOLA 34 X 3( 3) 5( 8) 4(12) 1(13) X(13) X(13) GFMX 290N 850W 34 X 5( 5) 5(10) 3(13) 1(14) X(14) X(14) PANAMA CITY FL 34 X 2( 2) 8(10) 6(16) 3(19) X(19) X(19) DESTIN EXEC AP 34 X X( X) 1( 1) 9(10) 7(17) X(17) X(17) COLUMBUS GA 34 X X( X) 1( 1) X( 1) 2( 3) X( 3) X( 3) BIRMINGHAM AL 34 X X( X) X( X) 1( 1) 6( 7) X( 7) X( 7) MONTGOMERY AL 34 X X( X) 1( 1) 2( 3) 7(10) X(10) X(10) WHITING FLD FL 34 X X( X) 2( 2) 12(14) 11(25) X(25) X(25) WHITING FLD FL 50 X X( X) X( X) 1( 1) 2( 3) X( 3) X( 3) PENSACOLA FL 34 X X( X) 2( 2) 15(17) 10(27) X(27) X(27) PENSACOLA FL 50 X X( X) X( X) 2( 2) 2( 4) X( 4) X( 4) GFMX 290N 870W 34 X 7( 7) 36(43) 8(51) 2(53) X(53) X(53) GFMX 290N 870W 50 X X( X) 6( 6) 3( 9) 1(10) X(10) X(10) GFMX 290N 870W 64 X X( X) 1( 1) 1( 2) X( 2) X( 2) X( 2) MOBILE AL 34 X X( X) 2( 2) 12(14) 10(24) X(24) X(24) MOBILE AL 50 X X( X) X( X) 2( 2) 2( 4) X( 4) X( 4) GULFPORT MS 34 X X( X) 2( 2) 8(10) 8(18) X(18) X(18) STENNIS MS 34 X X( X) 1( 1) 6( 7) 4(11) X(11) X(11) BURAS LA 34 X X( X) 2( 2) 4( 6) 3( 9) X( 9) X( 9) GFMX 280N 890W 34 X 4( 4) 18(22) 5(27) 1(28) X(28) X(28) GFMX 280N 890W 50 X X( X) 3( 3) 1( 4) X( 4) X( 4) X( 4) JACKSON MS 34 X X( X) X( X) 1( 1) 3( 4) X( 4) X( 4) NEW ORLEANS LA 34 X X( X) 1( 1) 2( 3) 3( 6) X( 6) X( 6) GFMX 280N 910W 34 X 1( 1) 1( 2) 2( 4) X( 4) X( 4) X( 4) $$ FORECASTER BROWN
Remnants of Fred Forecast Advisory Number 22
2021-08-15 04:48:16| National Hurricane Center (Atlantic)
Issued at 0300 UTC SUN AUG 15 2021 000 WTNT21 KNHC 150248 TCMAT1 REMNANTS OF FRED FORECAST/ADVISORY NUMBER 22 NWS NATIONAL HURRICANE CENTER MIAMI FL AL062021 0300 UTC SUN AUG 15 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. INTERESTS IN THE NORTHERN COAST OF THE GULF OF MEXICO FROM MISSISSIPPI TO THE CENTRAL FLORIDA PANHANDLE SHOULD MONITOR THE PROGRESS OF THE REMNANTS OF FRED. WATCHES AND WARNINGS COULD BE REQUIRED FOR PORTIONS OF THIS AREA EARLY SUNDAY. REMNANTS OF CENTER LOCATED NEAR 23.8N 84.3W AT 15/0300Z POSITION ACCURATE WITHIN 40 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 300 DEGREES AT 8 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1012 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 23.8N 84.3W AT 15/0300Z AT 15/0000Z CENTER WAS LOCATED NEAR 23.6N 84.1W FORECAST VALID 15/1200Z 25.3N 85.7W...TROPICAL CYCLONE MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 60NE 40SE 0SW 0NW. FORECAST VALID 16/0000Z 26.8N 86.9W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 60NE 50SE 0SW 0NW. FORECAST VALID 16/1200Z 28.3N 87.8W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 60NE 60SE 0SW 0NW. FORECAST VALID 17/0000Z 29.7N 88.0W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 60NE 60SE 0SW 30NW. FORECAST VALID 17/1200Z 31.4N 87.9W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 18/0000Z 33.1N 87.6W...INLAND 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 19/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 23.8N 84.3W NEXT ADVISORY AT 15/0900Z $$ FORECASTER BROWN
Tags: number
advisory
fred
forecast
Remnants of Fred Graphics
2021-08-14 22:40:58| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Sat, 14 Aug 2021 20:40:58 GMT Wind Speed Probabilities last updated Sat, 14 Aug 2021 21:23:00 GMT
Remnants of Fred Forecast Discussion Number 21
2021-08-14 22:39:58| National Hurricane Center (Atlantic)
Issued at 500 PM EDT Sat Aug 14 2021 040 WTNT41 KNHC 142039 TCDAT1 Remnants Of Fred Discussion Number 21 NWS National Hurricane Center Miami FL AL062021 500 PM EDT Sat Aug 14 2021 Satellite imagery this afternoon shows that a broad and elongated circulation has formed in association with the remnants of Fred, and that the convection has become more concentrated at the east end of the elongated center. However, neither the circulation nor the convection are organized enough to justify calling the system a tropical cyclone at this time. An Air Force Reserve Hurricane Hunter aircraft is scheduled to survey the remnants of Fred this evening to see how far the re-development has progressed. The initial motion is a still very uncertain 300/11. The system is expected to move northwestward around the western periphery of the subtropical ridge, with a turn toward the north expected as the system nears and moves inland along the northern Gulf coast in 48-60 h. The forecast guidance remains in good agreement on this general scenario and the new NHC forecast track is close the the consensus models. However, some adjustments to the track forecast could occur depending on where the center of Fred re-forms. Therefore, users should not concentrate on the details of the forecast track, which could change quite a bit during the next day or so. The global models are now in better agreement that the upper-level trough over the eastern Gulf of Mexico that has been hindering the development of Fred will move northward and weaken during the next 24 h. They also indicate that Fred is likely to re-form a well-defined closed circulation over the eastern Gulf of Mexico Sunday morning. Thus, the intensity forecast now calls for Fred to regain tropical cyclone status in about 12 h, followed by gradual strengthening until landfall in a less than ideal upper-level wind environment. After landfall, the system should weaken and dissipate between 96-120 h. The new NHC intensity forecast follows the overall trend of the intensity guidance. Although no coastal watches or warnings are currently in effect, the National Hurricane Center will continue 6-hourly advisories on the remnants of Fred in anticipation of re-development. Watches could be required for portions of the northern Gulf coast tonight, and warnings may be required on Sunday. KEY MESSAGES: 1. Today through Monday, heavy rainfall could lead to areal, urban, and small stream flooding impacts, and cause new and renewed river flooding across southern Florida, the Big Bend, and Panhandle. From Monday onward, heavy rain and flood impacts could extend into other portions of the Southeast and into the southern and central Appalachians and Piedmont as Fred interacts with a front in the area. 2. Fred is forecast to regenerate as a tropical cyclone over the Gulf of Mexico tonight or on Sunday, and bring a risk of tropical storm conditions to portions of the northern Gulf coast, especially from coastal Mississippi to the Florida Panhandle beginning on Monday. Watches may be required for a portion of this area tonight, and warnings may be required on Sunday. FORECAST POSITIONS AND MAX WINDS INIT 14/2100Z 24.0N 84.6W 30 KT 35 MPH...DISTURBANCE 12H 15/0600Z 25.0N 85.7W 30 KT 35 MPH...TROPICAL CYCLONE 24H 15/1800Z 26.6N 87.1W 35 KT 40 MPH 36H 16/0600Z 28.0N 87.9W 40 KT 45 MPH 48H 16/1800Z 29.4N 88.2W 45 KT 50 MPH 60H 17/0600Z 30.9N 88.3W 35 KT 40 MPH...INLAND 72H 17/1800Z 32.4N 88.2W 25 KT 30 MPH...INLAND 96H 18/1800Z 36.0N 87.5W 20 KT 25 MPH...POST-TROP/INLAND 120H 19/1800Z...DISSIPATED $$ Forecaster Beven
Tags: number
discussion
fred
forecast
Sites : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] next »