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Tropical Depression Eight Wind Speed Probabilities Number 2
2021-08-16 10:49:40| National Hurricane Center (Atlantic)
Issued at 0900 UTC MON AUG 16 2021 000 FONT13 KNHC 160849 PWSAT3 TROPICAL DEPRESSION EIGHT WIND SPEED PROBABILITIES NUMBER 2 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082021 0900 UTC MON AUG 16 2021 AT 0900Z THE CENTER OF TROPICAL DEPRESSION EIGHT WAS LOCATED NEAR LATITUDE 32.4 NORTH...LONGITUDE 62.9 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 CAPE HATTERAS 34 X X( X) X( X) X( X) 1( 1) 1( 2) 1( 3) BERMUDA 34 6 11(17) 12(29) 8(37) 6(43) 2(45) 2(47) BERMUDA 50 X 1( 1) 1( 2) 2( 4) 1( 5) 1( 6) 1( 7) BERMUDA 64 X X( X) X( X) 1( 1) X( 1) X( 1) X( 1) $$ FORECASTER STEWART
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Tropical Depression Eight Public Advisory Number 2
2021-08-16 10:49:07| National Hurricane Center (Atlantic)
Issued at 500 AM AST Mon Aug 16 2021 000 WTNT33 KNHC 160849 TCPAT3 BULLETIN Tropical Depression Eight Advisory Number 2 NWS National Hurricane Center Miami FL AL082021 500 AM AST Mon Aug 16 2021 ...TROPICAL DEPRESSION PASSING TO THE EAST-SOUTHEAST OF BERMUDA... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...32.4N 62.9W ABOUT 110 MI...180 KM E OF BERMUDA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...SSW OR 195 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...1012 MB...29.89 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... * Bermuda A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Tropical Depression Eight was located near latitude 32.4 North, longitude 62.9 West. The depression is moving toward the south-southwest near 5 mph (7 km/h) and this motion is expected to continue this morning. A slow clockwise turn toward the southwest and west is anticipated during the next couple of days, followed by a continued westward motion on Wednesday. On the forecast track, the center of the depression will pass to the southeast and south of Bermuda during the next few days. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Slow strengthening is forecast and the system is forecast to become a tropical storm later today. The estimated minimum central pressure is 1012 mb (29.89 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Tropical storm conditions are possible across Bermuda and the nearby waters on Tuesday, particularly to the south of the island. NEXT ADVISORY ------------- Next intermediate advisory at 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Stewart
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Tropical Depression Eight Forecast Advisory Number 2
2021-08-16 10:48:43| National Hurricane Center (Atlantic)
Issued at 0900 UTC MON AUG 16 2021 000 WTNT23 KNHC 160848 TCMAT3 TROPICAL DEPRESSION EIGHT FORECAST/ADVISORY NUMBER 2 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082021 0900 UTC MON AUG 16 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WATCH IS IN EFFECT FOR... * BERMUDA A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. TROPICAL DEPRESSION CENTER LOCATED NEAR 32.4N 62.9W AT 16/0900Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE SOUTH-SOUTHWEST OR 195 DEGREES AT 4 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 32.4N 62.9W AT 16/0900Z AT 16/0600Z CENTER WAS LOCATED NEAR 32.6N 62.8W FORECAST VALID 16/1800Z 31.6N 63.1W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 0NE 0SE 20SW 20NW. FORECAST VALID 17/0600Z 31.0N 63.7W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 0NE 30SE 40SW 40NW. FORECAST VALID 17/1800Z 30.7N 64.5W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 40NE 40SE 40SW 30NW. FORECAST VALID 18/0600Z 30.7N 65.5W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 50NE 40SE 40SW 50NW. FORECAST VALID 18/1800Z 30.8N 66.7W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 60NE 40SE 40SW 60NW. FORECAST VALID 19/0600Z 31.1N 68.0W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 30NE 30SE 0SW 0NW. 34 KT... 70NE 70SE 50SW 50NW. 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 20/0600Z 32.0N 69.0W MAX WIND 55 KT...GUSTS 65 KT. OUTLOOK VALID 21/0600Z 34.0N 68.5W MAX WIND 55 KT...GUSTS 65 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 32.4N 62.9W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 16/1200Z NEXT ADVISORY AT 16/1500Z $$ FORECASTER STEWART
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Tropical Depression Grace Forecast Discussion Number 12
2021-08-16 10:48:10| National Hurricane Center (Atlantic)
Issued at 500 AM EDT Mon Aug 16 2021 930 WTNT42 KNHC 160848 TCDAT2 Tropical Depression Grace Discussion Number 12 NWS National Hurricane Center Miami FL AL072021 500 AM EDT Mon Aug 16 2021 The structure and organization of Tropical Depression Grace has changed little over the past several hours. An earlier ASCAT-B overpass showed that the circulation is elongated from the NE-SW, with peak winds of 30 kt. An Air Force Reserve Hurricane Hunter Aircraft investigated Grace a few hours ago, and indicated that the cyclone refuses to make the decrease in forward speed and turn to the west-northwest that most of the guidance has been calling for. The aircraft also measured peak flight level winds of 37 kt at 925 mb, which equates to about 28 kt at the surface. Although there were some SFMR vectors of tropical storm force, those winds were sampled in heavy rainfall and were likely not representative of the actual surface winds. Based on this data, the initial intensity is kept at 30 kt for this advisory. Grace is moving toward the west, or 275/13 kt. The forecast models continue to make a shift to the south, as they are coming into very good agreement on maintaining a strong mid-level ridge to the north of the cyclone throughout the forecast period. The latest track forecast was adjusted a little south of the previous one through the first couple of days of the forecast, with a larger shift to the south farther out in time. This forecast track remains to the north of the track consensus, so if the track models remain consistent, additional adjustments to the south will likely be made in the next forecast cycle. The evolution of the forecast track of Grace is having major implications on the future intensity of the cyclone. It is becoming more likely that the system will track over only the southern portion of Hispaniola, which would result in a lesser disruption of Grace's circulation. Furthermore, the more southern track would bring the cyclone over the warm waters of the northwestern Caribbean beginning on Tuesday. The environment over that portion of the Caribbean is not all that hostile, with about 10-15 kt of northerly shear being the main inhibiting factor for intensification. By midweek, Grace may interact with the Yucatan Peninsula, which should limit strengthening or perhaps weaken the system depending on the track. Once over the western Gulf of Mexico, late in the forecast period, some additional strengthening is expected, although the wind shear is forecast to increase slightly during that time frame. The latest NHC intensity forecast was raised slightly to reflect the additional time expected over water. However, this forecast is a little lower than most of the guidance. Key Messages: 1. Heavy rainfall across the Dominican Republic, Haiti, Cuba, Jamaica, and the Cayman Islands may lead to flash, urban, and small stream flooding, with the potential for mudslides highest in Haiti and the Dominican Republic. 2. Tropical storm conditions are possible over portions of Hispaniola today and tonight. 3. There is a risk of some wind and rainfall impacts across southeastern Cuba and Jamaica beginning Tuesday morning, and the Cayman Islands by Tuesday night. Interests there areas should monitor the progress of Grace and updates to the forecast. FORECAST POSITIONS AND MAX WINDS INIT 16/0900Z 17.4N 70.2W 30 KT 35 MPH 12H 16/1800Z 17.9N 72.2W 30 KT 35 MPH 24H 17/0600Z 18.6N 74.8W 30 KT 35 MPH 36H 17/1800Z 19.3N 77.4W 35 KT 40 MPH 48H 18/0600Z 20.1N 80.2W 35 KT 40 MPH 60H 18/1800Z 20.8N 83.3W 40 KT 45 MPH 72H 19/0600Z 21.6N 86.3W 45 KT 50 MPH 96H 20/0600Z 22.6N 91.8W 45 KT 50 MPH 120H 21/0600Z 23.4N 96.2W 50 KT 60 MPH $$ Forecaster Latto
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Tropical Depression Grace Wind Speed Probabilities Number 12
2021-08-16 10:48:10| National Hurricane Center (Atlantic)
Issued at 0900 UTC MON AUG 16 2021 932 FONT12 KNHC 160848 PWSAT2 TROPICAL DEPRESSION GRACE WIND SPEED PROBABILITIES NUMBER 12 NWS NATIONAL HURRICANE CENTER MIAMI FL AL072021 0900 UTC MON AUG 16 2021 AT 0900Z THE CENTER OF TROPICAL DEPRESSION GRACE WAS LOCATED NEAR LATITUDE 17.4 NORTH...LONGITUDE 70.2 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 KEY WEST FL 34 X X( X) X( X) 1( 1) 2( 3) X( 3) X( 3) GFMX 280N 930W 34 X X( X) X( X) X( X) X( X) 1( 1) 2( 3) GFMX 280N 950W 34 X X( X) X( X) X( X) X( X) 1( 1) 2( 3) GFMX 270N 960W 34 X X( X) X( X) X( X) X( X) 1( 1) 5( 6) MCALLEN TX 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) HARLINGEN TX 34 X X( X) X( X) X( X) X( X) X( X) 4( 4) BROWNSVILLE TX 34 X X( X) X( X) X( X) X( X) X( X) 5( 5) GFMX 250N 960W 34 X X( X) X( X) X( X) X( X) 3( 3) 12(15) GFMX 250N 960W 50 X X( X) X( X) X( X) X( X) X( X) 3( 3) LA PESCA MX 34 X X( X) X( X) X( X) X( X) X( X) 7( 7) TAMPICO MX 34 X X( X) X( X) X( X) X( X) X( X) 5( 5) TUXPAN MX 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) MERIDA MX 34 X X( X) X( X) X( X) 1( 1) 6( 7) 1( 8) COZUMEL MX 34 X X( X) X( X) X( X) 8( 8) 3(11) 1(12) CP SAN ANTONIO 34 X X( X) X( X) X( X) 20(20) 1(21) X(21) CP SAN ANTONIO 50 X X( X) X( X) X( X) 4( 4) X( 4) X( 4) HAVANA 34 X X( X) X( X) 1( 1) 7( 8) X( 8) X( 8) ISLE OF PINES 34 X X( X) X( X) 2( 2) 17(19) X(19) X(19) ISLE OF PINES 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) CIENFUEGOS 34 X X( X) X( X) 1( 1) 2( 3) X( 3) X( 3) CAMAGUEY 34 X X( X) 1( 1) 2( 3) X( 3) X( 3) X( 3) GRAND CAYMAN 34 X X( X) X( X) 4( 4) 5( 9) 1(10) X(10) MONTEGO BAY 34 X X( X) 6( 6) 3( 9) X( 9) X( 9) X( 9) KINGSTON 34 X X( X) 4( 4) X( 4) X( 4) X( 4) X( 4) LES CAYES 34 X 4( 4) X( 4) X( 4) X( 4) X( 4) X( 4) PORT-AU-PRINCE 34 6 3( 9) X( 9) X( 9) X( 9) X( 9) X( 9) CAPE BEATA 34 5 X( 5) X( 5) X( 5) X( 5) X( 5) X( 5) $$ FORECASTER LATTO
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