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Tropical Depression Eta Forecast Discussion Number 22
2020-11-06 03:54:23| National Hurricane Center (Atlantic)
Issued at 900 PM CST Thu Nov 05 2020 000 WTNT44 KNHC 060254 TCDAT4 Tropical Depression Eta Discussion Number 22 NWS National Hurricane Center Miami FL AL292020 900 PM CST Thu Nov 05 2020 Eta has not become any better organized during the past several hours, and a specific center is hard to locate. It is estimated that the center is near a growing area of deep convection located east of the Belize. While it is possible the system has degenerated into a broad low or trough, there isn't enough evidence to break continuity, so Eta remains a 30-kt tropical depression on this advisory. Scatterometer data will probably come in overnight to provide a better look at the low-level circulation. The initial motion is an uncertain 360/7 kt. Eta should move northeastward on Friday around a developing mid- to upper-level trough over the Gulf of Mexico, then turn northward on Sunday and west-northwestward early next week as the trough cuts off into a closed low. The details of this sinuous path, however, are pretty fuzzy and small differences in the tropical cyclone position could lead to large errors down the line. The most notable change tonight is that the GFS-based guidance (including HWRF and HMON) have generally shifted northward and faster. The new forecast is moved eastward near Cuba, and then northward near the Florida Keys in response to this guidance and the 18Z ECMWF. It should be stressed this is a fairly uncertain forecast due to the strong trough interaction. Eta should begin to strengthen on Friday due to the low-level circulation forecast to become better defined in a fairly conducive environment. While vertical wind shear could increase this weekend, it is expected that upper-level divergence and trough dynamics will overwhelm the negative factors and cause continued intensification until the system reaches Cuba. The new forecast is raised from the previous one, but still lies below the NOAA corrected-consensus model HCCA. There isn't a lot of agreement on the intensity after Cuba, however, and the forecast hinges on how tropical it will remain after the trough interaction. The new forecast flattens out the intensity near Florida as a compromise between the various solutions, but I don't have much confidence in the forecast at that range. Key Messages: 1. Through Monday morning, heavy rainfall from Eta will lead to catastrophic, life-threatening flash flooding and river flooding across portions of Central America, along with landslides in areas of higher terrain. Flash and river flooding is also possible across Jamaica, southeast Mexico, the Cayman Islands and western Cuba. 2. Eta is forecast to regain tropical storm strength over the northwestern Caribbean Sea on Friday. Although the details of the future track and intensity of Eta are uncertain, there is an increasing risk of impacts from wind and rainfall in portions of the Cayman Islands, Cuba, southern Florida and the Florida Keys and the northwestern Bahamas this weekend and early next week. FORECAST POSITIONS AND MAX WINDS INIT 06/0300Z 16.6N 87.8W 30 KT 35 MPH 12H 06/1200Z 17.5N 87.2W 35 KT 40 MPH 24H 07/0000Z 18.8N 85.4W 40 KT 45 MPH 36H 07/1200Z 19.7N 83.2W 45 KT 50 MPH 48H 08/0000Z 20.8N 81.0W 55 KT 65 MPH 60H 08/1200Z 22.6N 79.8W 50 KT 60 MPH...INLAND 72H 09/0000Z 24.2N 80.4W 55 KT 65 MPH...OVER WATER 96H 10/0000Z 25.0N 83.0W 55 KT 65 MPH 120H 11/0000Z 25.5N 85.0W 55 KT 65 MPH $$ Forecaster Blake
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Tropical Depression Eta Graphics
2020-11-06 03:54:18| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Fri, 06 Nov 2020 02:54:18 GMT Wind Speed Probabilities last updated Fri, 06 Nov 2020 03:24:42 GMT
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Summary for Tropical Depression Eta (AT4/AL292020)
2020-11-06 03:53:29| National Hurricane Center (Atlantic)
...ETA FORECAST TO STRENGTHEN AND MOVE NORTHEASTWARD ON FRIDAY... ...STILL CAUSING HEAVY RAINS AND LIFE-THREATENING FLOODING OVER PORTIONS OF CENTRAL AMERICA... As of 9:00 PM CST Thu Nov 5 the center of Eta was located near 16.6, -87.8 with movement N at 8 mph. The minimum central pressure was 1004 mb with maximum sustained winds of about 35 mph.
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Tropical Depression Eta Public Advisory Number 22
2020-11-06 03:53:29| National Hurricane Center (Atlantic)
Issued at 900 PM CST Thu Nov 05 2020 000 WTNT34 KNHC 060253 TCPAT4 BULLETIN Tropical Depression Eta Advisory Number 22 NWS National Hurricane Center Miami FL AL292020 900 PM CST Thu Nov 05 2020 ...ETA FORECAST TO STRENGTHEN AND MOVE NORTHEASTWARD ON FRIDAY... ...STILL CAUSING HEAVY RAINS AND LIFE-THREATENING FLOODING OVER PORTIONS OF CENTRAL AMERICA... SUMMARY OF 900 PM CST...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...16.6N 87.8W ABOUT 85 MI...140 KM NW OF LA CEIBA HONDURAS ABOUT 470 MI...760 KM WSW OF GRAND CAYMAN MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... * The Cayman Islands A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. The governments of Nicaragua and Honduras continue to issue warnings on heavy rain and flooding in those countries, and interests in those areas should continue to monitor the depression. Interests in Cuba, the northwestern Bahamas, Florida Keys and southern Florida should monitor the progress of this system as Tropical Storm Watches could be required for some of these areas on Friday. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 900 PM CST (0300 UTC), the center of Tropical Depression Eta was located near latitude 16.6 North, longitude 87.8 West. The depression is moving toward the north near 8 mph (13 km/h). A turn toward the northeast is expected on Friday, with this motion continuing through early Sunday. On the forecast track, the center of Eta will be over the western Caribbean Sea through Friday, approach the Cayman Islands Saturday and Saturday night, and be near Cuba on Sunday. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Eta is forecast to become a tropical storm again on Friday, with further strengthening possible through early Sunday. The estimated minimum central pressure based on nearby surface observations is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Eta can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml. RAINFALL: Eta is expected to produce the following rainfall amounts through Tuesday morning: Portions of Central America: An additional 5 to 10 inches (125 to 255 mm), isolated maximum storm totals of 40 inches (1000 mm) in eastern Honduras and eastern Nicaragua. Southeastern Mexico and Jamaica: An additional 2 to 5 inches (50 to 125 mm), isolated maximum storm totals of 15 inches (380 mm). The Cayman Islands into portions of Cuba: 10 to 20 inches (255 to 510 mm), isolated maximum totals of 30 inches (760 mm). This rainfall will lead to catastrophic, life-threatening flash flooding and river flooding, along with landslides in areas of higher terrain of Central America. Significant, life-threatening flash flooding and river flooding is possible in the Cayman Islands and Cuba. Flash flooding and river flooding is expected for Jamaica and southeast Mexico. WIND: Tropical storm conditions are possible in the Cayman Islands Saturday or Saturday night. SURF: Swells generated by Eta are expected to affect portions of the coast of Central America and the Yucatan Peninsula of Mexico during the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 1200 AM CST. Next complete advisory at 300 AM CST. $$ Forecaster Blake
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Tropical Depression Eta Wind Speed Probabilities Number 22
2020-11-06 03:53:28| National Hurricane Center (Atlantic)
Issued at 0300 UTC FRI NOV 06 2020 000 FONT14 KNHC 060253 PWSAT4 TROPICAL DEPRESSION ETA WIND SPEED PROBABILITIES NUMBER 22 NWS NATIONAL HURRICANE CENTER MIAMI FL AL292020 0300 UTC FRI NOV 06 2020 AT 0300Z THE CENTER OF TROPICAL DEPRESSION ETA WAS LOCATED NEAR LATITUDE 16.6 NORTH...LONGITUDE 87.8 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 STANDARD TIME (EST)...SUBTRACT 5 HOURS FROM Z TIME CENTRAL STANDARD TIME (CST)...SUBTRACT 6 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 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 00Z FRI 12Z FRI 00Z SAT 12Z SAT 00Z SUN 00Z MON 00Z TUE PERIODS TO TO TO TO TO TO TO 12Z FRI 00Z SAT 12Z SAT 00Z SUN 00Z MON 00Z TUE 00Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT KINGS BAY GA 34 X X( X) X( X) X( X) X( X) 2( 2) 1( 3) MAYPORT NS FL 34 X X( X) X( X) X( X) 1( 1) 2( 3) 2( 5) GAINESVILLE FL 34 X X( X) X( X) X( X) 1( 1) 2( 3) 2( 5) DAYTONA BEACH 34 X X( X) X( X) X( X) 1( 1) 3( 4) 1( 5) THE VILLAGES 34 X X( X) X( X) X( X) 1( 1) 4( 5) 2( 7) ORLANDO FL 34 X X( X) X( X) X( X) 2( 2) 5( 7) 2( 9) COCOA BEACH FL 34 X X( X) X( X) X( X) 5( 5) 7(12) 3(15) PATRICK AFB 34 X X( X) X( X) X( X) 5( 5) 7(12) 3(15) FT PIERCE FL 34 X X( X) X( X) X( X) 9( 9) 9(18) 2(20) FT PIERCE FL 50 X X( X) X( X) X( X) 1( 1) 1( 2) 1( 3) W PALM BEACH 34 X X( X) X( X) X( X) 14(14) 11(25) 2(27) W PALM BEACH 50 X X( X) X( X) X( X) 2( 2) 3( 5) 1( 6) W PALM BEACH 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) FT LAUDERDALE 34 X X( X) X( X) X( X) 19(19) 12(31) 2(33) FT LAUDERDALE 50 X X( X) X( X) X( X) 4( 4) 4( 8) 1( 9) FT LAUDERDALE 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) MIAMI FL 34 X X( X) X( X) X( X) 12(12) 10(22) 3(25) MIAMI FL 50 X X( X) X( X) X( X) 2( 2) 2( 4) 1( 5) HOMESTEAD ARB 34 X X( X) X( X) X( X) 14(14) 9(23) 2(25) HOMESTEAD ARB 50 X X( X) X( X) X( X) 2( 2) 3( 5) 1( 6) HOMESTEAD ARB 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) MARATHON FL 34 X X( X) X( X) 1( 1) 21(22) 12(34) 4(38) MARATHON FL 50 X X( X) X( X) X( X) 6( 6) 5(11) 2(13) MARATHON FL 64 X X( X) X( X) X( X) 1( 1) 1( 2) 1( 3) KEY WEST FL 34 X X( X) X( X) 1( 1) 15(16) 13(29) 5(34) KEY WEST FL 50 X X( X) X( X) X( X) 4( 4) 5( 9) 3(12) KEY WEST FL 64 X X( X) X( X) X( X) 1( 1) 2( 3) X( 3) NAPLES FL 34 X X( X) X( X) X( X) 11(11) 17(28) 5(33) NAPLES FL 50 X X( X) X( X) X( X) 1( 1) 5( 6) 2( 8) NAPLES FL 64 X X( X) X( X) X( X) X( X) 1( 1) 1( 2) FT MYERS FL 34 X X( X) X( X) X( X) 4( 4) 12(16) 3(19) FT MYERS FL 50 X X( X) X( X) X( X) X( X) 2( 2) 1( 3) VENICE FL 34 X X( X) X( X) X( X) 5( 5) 16(21) 7(28) VENICE FL 50 X X( X) X( X) X( X) 1( 1) 4( 5) 1( 6) TAMPA FL 34 X X( X) X( X) X( X) 3( 3) 10(13) 6(19) TAMPA FL 50 X X( X) X( X) X( X) X( X) 2( 2) 1( 3) CEDAR KEY FL 34 X X( X) X( X) X( X) 1( 1) 7( 8) 3(11) TALLAHASSEE FL 34 X X( X) X( X) X( X) X( X) 1( 1) 2( 3) ST MARKS FL 34 X X( X) X( X) X( X) X( X) 2( 2) 1( 3) APALACHICOLA 34 X X( X) X( X) X( X) X( X) 5( 5) 4( 9) GFMX 290N 850W 34 X X( X) X( X) X( X) X( X) 7( 7) 6(13) PANAMA CITY FL 34 X X( X) X( X) X( X) X( X) 3( 3) 3( 6) GFMX 290N 870W 34 X X( X) X( X) X( X) X( X) 4( 4) 6(10) GFMX 280N 890W 34 X X( X) X( X) X( X) X( X) 2( 2) 6( 8) GFMX 280N 910W 34 X X( X) X( X) X( X) X( X) 1( 1) 3( 4) COZUMEL MX 34 X 1( 1) 1( 2) X( 2) 1( 3) X( 3) 1( 4) BELIZE CITY 34 4 X( 4) 1( 5) X( 5) X( 5) X( 5) X( 5) GUANAJA 34 3 2( 5) 1( 6) X( 6) X( 6) X( 6) X( 6) GRAND BAHAMA 34 X X( X) X( X) X( X) 15(15) 7(22) 2(24) GRAND BAHAMA 50 X X( X) X( X) X( X) 2( 2) 2( 4) X( 4) GRAND BAHAMA 64 X X( X) X( X) X( X) 1( 1) X( 1) X( 1) NEW PROVIDENCE 34 X X( X) X( X) X( X) 18(18) 5(23) 1(24) NEW PROVIDENCE 50 X X( X) X( X) X( X) 3( 3) 1( 4) X( 4) ANDROS 34 X X( X) X( X) 1( 1) 23(24) 4(28) 1(29) ANDROS 50 X X( X) X( X) X( X) 5( 5) 2( 7) X( 7) ANDROS 64 X X( X) X( X) X( X) 1( 1) X( 1) X( 1) GREAT EXUMA 34 X X( X) X( X) X( X) 10(10) 1(11) 1(12) SAN SALVADOR 34 X X( X) X( X) X( X) 3( 3) 2( 5) X( 5) CP SAN ANTONIO 34 X X( X) 1( 1) 2( 3) 1( 4) 4( 8) 4(12) HAVANA 34 X X( X) 1( 1) 3( 4) 7(11) 7(18) 4(22) HAVANA 50 X X( X) X( X) X( X) 2( 2) 2( 4) 1( 5) HAVANA 64 X X( X) X( X) X( X) X( X) 1( 1) 1( 2) ISLE OF PINES 34 X X( X) 4( 4) 12(16) 3(19) 3(22) 1(23) ISLE OF PINES 50 X X( X) X( X) 3( 3) 1( 4) X( 4) 1( 5) ISLE OF PINES 64 X X( X) X( X) 1( 1) X( 1) X( 1) X( 1) CIENFUEGOS 34 X X( X) X( X) 7( 7) 23(30) 1(31) 1(32) CIENFUEGOS 50 X X( X) X( X) 1( 1) 7( 8) 1( 9) X( 9) CIENFUEGOS 64 X X( X) X( X) X( X) 2( 2) X( 2) X( 2) CAMAGUEY 34 X X( X) X( X) 2( 2) 17(19) 1(20) X(20) CAMAGUEY 50 X X( X) X( X) X( X) 2( 2) 1( 3) X( 3) GRAND CAYMAN 34 X 1( 1) 14(15) 27(42) 3(45) 1(46) X(46) GRAND CAYMAN 50 X X( X) 1( 1) 7( 8) 1( 9) X( 9) X( 9) GRAND CAYMAN 64 X X( X) X( X) 2( 2) X( 2) X( 2) X( 2) MONTEGO BAY 34 X X( X) 1( 1) 5( 6) 2( 8) 1( 9) X( 9) KINGSTON 34 X X( X) X( X) 2( 2) 1( 3) X( 3) X( 3) PENSACOLA NAS 34 X X( X) X( X) X( X) X( X) 1( 1) 3( 4) KEESLER AB 34 X X( X) X( X) X( X) X( X) 1( 1) 2( 3) $$ FORECASTER BLAKE
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