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Hurricane Henri Wind Speed Probabilities Number 24
2021-08-21 22:33:37| National Hurricane Center (Atlantic)
Issued at 2100 UTC SAT AUG 21 2021 000 FONT13 KNHC 212033 PWSAT3 HURRICANE HENRI WIND SPEED PROBABILITIES NUMBER 24 NWS NATIONAL HURRICANE CENTER MIAMI FL AL082021 2100 UTC SAT AUG 21 2021 AT 2100Z THE CENTER OF HURRICANE HENRI WAS LOCATED NEAR LATITUDE 36.3 NORTH...LONGITUDE 71.4 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 65 KTS...75 MPH...120 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 18Z SAT 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 18Z SAT 06Z SUN 18Z SUN 06Z MON 18Z MON 18Z TUE 18Z WED PERIODS TO TO TO TO TO TO TO 06Z SUN 18Z SUN 06Z MON 18Z MON 18Z TUE 18Z WED 18Z THU FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT YARMOUTH NS 34 X 1( 1) 2( 3) 1( 4) 3( 7) X( 7) X( 7) ST JOHN NB 34 X X( X) X( X) 1( 1) 2( 3) X( 3) X( 3) EASTPORT ME 34 X 1( 1) 1( 2) 1( 3) 5( 8) X( 8) X( 8) BAR HARBOR ME 34 X 3( 3) 3( 6) 3( 9) 4(13) X(13) X(13) AUGUSTA ME 34 X 5( 5) 5(10) 3(13) 6(19) X(19) X(19) PORTLAND ME 34 X 9( 9) 8(17) 5(22) 5(27) X(27) X(27) PORTLAND ME 50 X X( X) 1( 1) 1( 2) 1( 3) X( 3) X( 3) CONCORD NH 34 1 15(16) 19(35) 7(42) 3(45) X(45) X(45) CONCORD NH 50 X X( X) 4( 4) 2( 6) X( 6) X( 6) X( 6) CONCORD NH 64 X X( X) 1( 1) X( 1) X( 1) X( 1) X( 1) PORTSMOUTH NH 34 1 15(16) 16(32) 5(37) 3(40) X(40) X(40) PORTSMOUTH NH 50 X X( X) 3( 3) 1( 4) X( 4) X( 4) X( 4) WORCESTER MA 34 2 35(37) 28(65) 3(68) X(68) X(68) X(68) WORCESTER MA 50 X 6( 6) 15(21) 1(22) X(22) X(22) X(22) WORCESTER MA 64 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) SPRINGFIELD MA 34 2 35(37) 28(65) 3(68) 1(69) X(69) X(69) SPRINGFIELD MA 50 X 6( 6) 13(19) X(19) 1(20) X(20) X(20) SPRINGFIELD MA 64 X 1( 1) 3( 4) X( 4) X( 4) X( 4) X( 4) BOSTON MA 34 2 29(31) 23(54) 2(56) 1(57) X(57) X(57) BOSTON MA 50 X 3( 3) 8(11) X(11) 1(12) X(12) X(12) BOSTON MA 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) HYANNIS MA 34 3 37(40) 13(53) 2(55) X(55) X(55) X(55) HYANNIS MA 50 X 4( 4) 5( 9) X( 9) X( 9) X( 9) X( 9) HYANNIS MA 64 X 1( 1) X( 1) X( 1) X( 1) X( 1) X( 1) NANTUCKET MA 34 11 50(61) 3(64) X(64) X(64) X(64) X(64) NANTUCKET MA 50 X 12(12) 2(14) 1(15) X(15) X(15) X(15) NANTUCKET MA 64 X 1( 1) X( 1) X( 1) X( 1) X( 1) X( 1) PROVIDENCE RI 34 6 65(71) 8(79) 1(80) X(80) X(80) X(80) PROVIDENCE RI 50 X 27(27) 11(38) 1(39) X(39) X(39) X(39) PROVIDENCE RI 64 X 3( 3) 2( 5) X( 5) X( 5) X( 5) X( 5) BRIDGEPORT CT 34 2 49(51) 18(69) 1(70) 1(71) X(71) X(71) BRIDGEPORT CT 50 X 9( 9) 6(15) 1(16) X(16) X(16) X(16) BRIDGEPORT CT 64 X 2( 2) 2( 4) X( 4) X( 4) X( 4) X( 4) NEW HAVEN CT 34 2 54(56) 18(74) 1(75) 1(76) X(76) X(76) NEW HAVEN CT 50 X 13(13) 10(23) X(23) 1(24) X(24) X(24) NEW HAVEN CT 64 X 4( 4) 2( 6) 1( 7) X( 7) X( 7) X( 7) HARTFORD CT 34 2 45(47) 25(72) 2(74) X(74) X(74) X(74) HARTFORD CT 50 X 11(11) 12(23) 1(24) X(24) X(24) X(24) HARTFORD CT 64 X 3( 3) 2( 5) X( 5) X( 5) X( 5) X( 5) NEW LONDON CT 34 3 66(69) 15(84) 1(85) X(85) X(85) X(85) NEW LONDON CT 50 X 27(27) 17(44) 1(45) X(45) X(45) X(45) NEW LONDON CT 64 X 4( 4) 4( 8) X( 8) X( 8) X( 8) X( 8) ALBANY NY 34 1 13(14) 17(31) 2(33) X(33) X(33) X(33) ALBANY NY 50 X X( X) 2( 2) 1( 3) X( 3) X( 3) X( 3) POUGHKEEPSIE 34 1 21(22) 21(43) 1(44) 1(45) X(45) X(45) POUGHKEEPSIE 50 X 1( 1) 3( 4) X( 4) X( 4) X( 4) X( 4) POUGHKEEPSIE 64 X X( X) 1( 1) X( 1) X( 1) X( 1) X( 1) MONTAUK POINT 34 10 79(89) 4(93) X(93) X(93) X(93) X(93) MONTAUK POINT 50 X 51(51) 8(59) 1(60) X(60) X(60) X(60) MONTAUK POINT 64 X 12(12) 2(14) 1(15) X(15) X(15) X(15) ISLIP NY 34 2 57(59) 10(69) 1(70) X(70) X(70) X(70) ISLIP NY 50 X 10(10) 4(14) X(14) X(14) X(14) X(14) ISLIP NY 64 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) NYC JFK AIRPRT 34 4 50(54) 5(59) 1(60) X(60) X(60) X(60) NYC JFK AIRPRT 50 X 4( 4) 1( 5) X( 5) X( 5) X( 5) X( 5) NYC JFK AIRPRT 64 X 1( 1) 1( 2) X( 2) X( 2) X( 2) X( 2) NYC CNTRL PARK 34 1 30(31) 14(45) 1(46) X(46) X(46) X(46) NYC CNTRL PARK 50 X 2( 2) 1( 3) X( 3) X( 3) X( 3) X( 3) NEWARK NJ 34 1 24(25) 12(37) 2(39) X(39) X(39) X(39) TRENTON NJ 34 1 12(13) 8(21) 1(22) X(22) X(22) X(22) NWS EARLE NJ 34 2 23(25) 10(35) X(35) 1(36) X(36) X(36) ALLENTOWN PA 34 1 6( 7) 5(12) 1(13) X(13) X(13) X(13) PHILADELPHIA 34 1 8( 9) 5(14) 1(15) X(15) X(15) X(15) ATLANTIC CITY 34 2 9(11) 6(17) X(17) X(17) X(17) X(17) BALTIMORE MD 34 1 3( 4) 1( 5) 1( 6) X( 6) X( 6) X( 6) DOVER DE 34 1 4( 5) 2( 7) 1( 8) X( 8) X( 8) X( 8) ANNAPOLIS MD 34 1 3( 4) 1( 5) 1( 6) X( 6) X( 6) X( 6) WASHINGTON DC 34 1 2( 3) 1( 4) X( 4) X( 4) X( 4) X( 4) CAPE HENLOPEN 34 4 6(10) 2(12) X(12) X(12) X(12) X(12) OCEAN CITY MD 34 4 5( 9) 2(11) X(11) X(11) X(11) X(11) PAX RIVER NAS 34 1 2( 3) 1( 4) 1( 5) X( 5) X( 5) X( 5) WALLOPS CDA 34 4 3( 7) 1( 8) 1( 9) X( 9) X( 9) X( 9) OCEANA NAS VA 34 3 3( 6) X( 6) X( 6) X( 6) X( 6) X( 6) CAPE HATTERAS 34 3 X( 3) X( 3) X( 3) X( 3) X( 3) X( 3) $$ FORECASTER CANGIALOSI
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Hurricane Henri Public Advisory Number 24
2021-08-21 22:33:12| National Hurricane Center (Atlantic)
Issued at 500 PM EDT Sat Aug 21 2021 000 WTNT33 KNHC 212033 TCPAT3 BULLETIN Hurricane Henri Advisory Number 24 NWS National Hurricane Center Miami FL AL082021 500 PM EDT Sat Aug 21 2021 ...HENRI MOVING FASTER TO THE NORTH-NORTHEAST... ...A DANGEROUS STORM SURGE, HURRICANE CONDITIONS, AND FLOODING RAINFALL EXPECTED IN PORTIONS OF THE NORTHEAST UNITED STATES BEGINNING LATE TONIGHT OR EARLY SUNDAY... SUMMARY OF 500 PM EDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...36.3N 71.4W ABOUT 240 MI...390 KM ENE OF CAPE HATTERAS NORTH CAROLINA ABOUT 335 MI...535 KM S OF MONTAUK POINT NEW YORK MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 18 MPH...30 KM/H MINIMUM CENTRAL PRESSURE...991 MB...29.27 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * South shore of Long Island from Mastic Beach to Montauk Point New York * North shore of Long Island from Montauk Point to Flushing New York * Flushing New York to Chatham Massachusetts * Nantucket, Martha's Vineyard, and Block Island A Storm Surge Watch is in effect for... * East Rockaway Inlet to Mastic New York * North of Chatham Massachusetts to Sagamore Beach Massachusetts * Cape Cod Bay A Hurricane Warning is in effect for... * South shore of Long Island from Fire Island Inlet to Montauk Point * North shore of Long Island from Port Jefferson Harbor to Montauk Point * New Haven Connecticut to west of Westport Massachusetts * Block Island A Tropical Storm Warning is in effect for... * Port Jefferson Harbor to west of New Haven Connecticut * South shore of Long Island from west of Fire Island Inlet to East Rockaway Inlet * Westport Massachusetts to Chatham Massachusetts, including Martha's Vineyard and Nantucket * Coastal New York and New Jersey west of East Rockaway Inlet to Manasquan Inlet, including New York City A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm- force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline, in the indicated locations during the next 48 hours. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. Interests elsewhere in the northeastern U.S. should monitor the progress of Henri. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 500 PM EDT (2100 UTC), the center of Hurricane Henri was located near latitude 36.3 North, longitude 71.4 West. Henri is moving toward the north-northeast near 18 mph (30 km/h) and this motion is expected to continue through tonight. A decrease in forward speed and a turn toward the north-northwest is expected on Sunday. On the forecast track, Henri is expected to make landfall on Long Island or in southern New England on Sunday. Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Strengthening is forecast through tonight. Although some weakening is expected prior to landfall on Sunday, Henri is forecast to be at or near hurricane strength when it reaches the coasts of Long Island and southern New England. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). The estimated minimum central pressure is 991 mb (29.27 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Henri can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/graphics_at3.shtml?key_messages. STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... Flushing, NY to Chatham, MA including Narragansett Bay, Buzzards Bay, Vineyard Sound, and Nantucket Sound...3-5 ft North shore of Long Island from Flushing to Montauk Point, NY including Long Island Sound...3-5 ft South shore of Long Island from Mastic Beach to Montauk Point, NY...3-5 ft Chatham, MA to Sagamore Beach, MA including Cape Cod Bay...2-4 ft South shore of Long Island from East Rockaway Inlet to Mastic Beach, NY...2-4 ft Cape May, NJ to East Rockaway Inlet, NY...1-3 ft Sagamore Beach, MA to Merrimack River including Massachusetts Bay...1-3 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and dangerous waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Hurricane conditions are expected in the hurricane warning area late tonight or on Sunday, with tropical storm conditions expected by tonight. Tropical storm conditions are expected in the tropical storm warning area late tonight and Sunday. RAINFALL: Henri is expected to produce rainfall amounts of 3 to 6 inches over portions of Long Island, New England, southeast New York, and northern New Jersey Sunday into Monday, with isolated maximum totals near 10 inches. Heavy rainfall from Henri may result in considerable flash, urban, and small stream flooding, along with the potential for minor and moderate river flooding. TORNADOES: A tornado or two may occur Sunday over southern New England. SURF: Swells generated by Henri should continue to affect Bermuda during the next day or so. Swells are expected to increase across much of the east coast of the U.S. and Atlantic Canada today and Sunday. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 PM EDT. Next complete advisory at 1100 PM EDT. $$ Forecaster Cangialosi
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Hurricane Henri Public Advisory Number 23A
2021-08-21 19:34:34| National Hurricane Center (Atlantic)
Issued at 200 PM EDT Sat Aug 21 2021 511 WTNT33 KNHC 211734 TCPAT3 BULLETIN Hurricane Henri Intermediate Advisory Number 23A NWS National Hurricane Center Miami FL AL082021 200 PM EDT Sat Aug 21 2021 ...HENRI MOVING FASTER... ...A DANGEROUS STORM SURGE, HURRICANE CONDITIONS, AND FLOODING RAINFALL EXPECTED IN PORTIONS OF THE NORTHEAST UNITED STATES BEGINNING LATE TONIGHT OR EARLY SUNDAY... SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...35.4N 71.8W ABOUT 210 MI...335 KM E OF CAPE HATTERAS NORTH CAROLINA ABOUT 395 MI...635 KM S OF MONTAUK POINT NEW YORK MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...991 MB...29.27 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * South shore of Long Island from Mastic Beach to Montauk Point New York * North shore of Long Island from Montauk Point to Flushing New York * Flushing New York to Chatham Massachusetts * Nantucket, Martha's Vineyard, and Block Island A Storm Surge Watch is in effect for... * East Rockaway Inlet to Mastic New York * North of Chatham Massachusetts to Sagamore Beach Massachusetts * Cape Cod Bay A Hurricane Warning is in effect for... * South shore of Long Island from Fire Island Inlet to Montauk Point * North shore of Long Island from Port Jefferson Harbor to Montauk Point * New Haven Connecticut to west of Westport Massachusetts * Block Island A Tropical Storm Warning is in effect for... * Port Jefferson Harbor to west of New Haven Connecticut * South shore of Long Island from west of Fire Island Inlet to East Rockaway Inlet * Westport Massachusetts to Chatham Massachusetts, including Martha's Vineyard and Nantucket * Coastal New York and New Jersey west of East Rockaway Inlet to Manasquan Inlet, including New York City A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm- force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline, in the indicated locations during the next 48 hours. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. Interests elsewhere in the northeastern U.S. should monitor the progress of Henri. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 200 PM EDT (1800 UTC), the center of Hurricane Henri was located near latitude 35.4 North, longitude 71.8 West. Henri is moving toward the north-northeast near 17 mph (28 km/h), and this motion is expected to continue through tonight. A decrease in forward speed and a turn toward the north-northwest is expected on Sunday. On the forecast track, Henri is expected to make landfall on Long Island or in southern New England on Sunday. Maximum sustained winds remain near 75 mph (120 km/h) with higher gusts. Strengthening is forecast through tonight. Although some weakening is expected prior to landfall on Sunday, Henri is forecast to be at or near hurricane strength when it reaches the coasts of Long Island and southern New England. Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 125 miles (205 km). The minimum central pressure is estimated to be 991 mb (29.27 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Henri can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3, WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/graphics_at3.shtml?key_messages. STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... Flushing, NY to Chatham, MA including Narragansett Bay, Buzzards Bay, Vineyard Sound, and Nantucket Sound...3-5 ft North shore of Long Island from Flushing to Montauk Point, NY including Long Island Sound...3-5 ft South shore of Long Island from Mastic Beach to Montauk Point, NY...3-5 ft Chatham, MA to Sagamore Beach, MA including Cape Cod Bay...2-4 ft South shore of Long Island from East Rockaway Inlet to Mastic Beach, NY...2-4 ft Cape May, NJ to East Rockaway Inlet, NY...1-3 ft Sagamore Beach, MA to Merrimack River including Massachusetts Bay...1-3 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and dangerous waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Hurricane conditions are expected in the hurricane warning area late tonight or on Sunday, with tropical storm conditions expected by tonight. Tropical storm conditions are expected in the tropical storm warning area late tonight and Sunday. RAINFALL: Henri is expected to produce rainfall amounts of 3 to 6 inches over portions of Long Island, New England, southeast New York, and northern New Jersey Sunday into Monday, with isolated maximum totals near 10 inches. Heavy rainfall from Henri may result in considerable flash, urban, and small stream flooding, along with the potential for widespread minor and isolated moderate river flooding. TORNADOES: A tornado or two may occur Sunday over southern New England. SURF: Swells generated by Henri should continue to affect Bermuda during the next day or so. Swells are expected to increase across much of the east coast of the U.S. and Atlantic Canada today and Sunday. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 PM EDT. $$ Forecaster Cangialosi
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Tropical Storm Grace Public Advisory Number 33A
2021-08-21 19:33:30| National Hurricane Center (Atlantic)
Issued at 100 PM CDT Sat Aug 21 2021 000 WTNT32 KNHC 211733 TCPAT2 BULLETIN Tropical Storm Grace Intermediate Advisory Number 33A NWS National Hurricane Center Miami FL AL072021 100 PM CDT Sat Aug 21 2021 ...GRACE CONTINUES WEAKENING RAPIDLY OVER LAND BUT STILL CAUSING VERY HEAVY RAINS AND FLOODING OVER PORTIONS OF EAST-CENTRAL MEXICO... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...19.7N 99.5W ABOUT 35 MI...55 KM NW of CIUDAD DE MEXICO MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...WSW OR 250 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None.. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * The coast of mainland Mexico from Puerto Veracruz to Barra del Tordo A Tropical Storm Warning means that tropical storm conditions are expected somewhere withing the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 100 PM CDT (1800 UTC), the center of Tropical Storm Grace was located near latitude 19.7 North, longitude 99.5 West. Grace is moving toward the west near 13 mph (20 km/h) and a generally westward motion is expected into early Sunday. On the forecast track, the center will move over central and west-central Mexico through tonight. Maximum sustained winds have decreased to near 45 mph (75 km/h) with higher gusts. Continued rapid weakening is expected while the system moves over the mountains of central and west-central Mexico today and tonight, and Grace is forecast to weaken to a tropical depression later today and dissipate by early Sunday. Tropical-storm-force winds extend outward up to 150 miles (240 km) from the center. The estimated minimum central pressure is 998 mb (29.47 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Grace can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC and on the web at www.hurricanes.gov/graphics_at2.shtml?key_messages. STORM SURGE: Storm surge flooding should continue to subside along the coast of Mexico. WIND: Tropical storm conditions are expected to continue over portions of the tropical storm warning area along the coast of Mexico for the next few hours. RAINFALL: Grace is expected to produce the following rainfall amounts: Over Veracruz, Puebla, Tlaxcala, Hidalgo, Queretaro, and eastern San Luis Potosi, 6 to 12 inches of rain with isolated maximum totals of 18 inches are expected through Sunday. Over Ciudad de Mexico, 1 to 3 inches with isolated maximum totals of 5 inches. Heavy rainfall from Grace will result in significant flash and urban flooding as well as mudslides. SURF: High surf generated by Grace will affect the southern Gulf of Mexico coastline through the weekend. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 400 PM CDT. $$ Forecaster Pasch
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Tropical Storm Grace Forecast Discussion Number 33
2021-08-21 16:54:55| National Hurricane Center (Atlantic)
Issued at 1000 AM CDT Sat Aug 21 2021 000 WTNT42 KNHC 211454 TCDAT2 Tropical Storm Grace Discussion Number 33 NWS National Hurricane Center Miami FL AL072021 1000 AM CDT Sat Aug 21 2021 Grace has continued to move over east-central Mexico since making landfall around 0600 UTC. Visible satellite images show that the system's organization is degrading, but there is still some deep convection near the center with a few showers and thunderstorms near the coast. Assuming a slightly faster rate of weakening than given by the Decay-SHIPS output to account for the mountainous terrain, the advisory intensity is set to 60 kt. Additional rapid weakening should occur while the cyclone moves over the mountains of central and west-central Mexico today and tonight. Grace is likely to weaken below tropical storm strength tonight and dissipate tomorrow morning. After making a southwestward turn just after landfall, the current motion is just a little south of west, or 250/11 kt. A mid-level ridge to the north of Grace should cause a generally westward motion until dissipation on Sunday. The mid-level remnants of Grace are expected to continue westward after the surface center dissipates, and to emerge into the eastern Pacific Ocean by late Sunday. There is a good chance that this will lead to the formation of a new tropical cyclone over that basin by early next week. Key Messages: 1. Through the weekend, heavy rainfall across Veracruz, Puebla, Tlaxcala, Hidalgo, Queretaro, and eastern San Luis Potosi will lead to significant flash and urban flooding, along with the likelihood of mudslides. FORECAST POSITIONS AND MAX WINDS INIT 21/1500Z 19.7N 98.9W 60 KT 70 MPH 12H 22/0000Z 19.4N 100.6W 40 KT 45 MPH...INLAND 24H 22/1200Z 19.0N 102.5W 25 KT 30 MPH...POST-TROP/INLAND 36H 23/0000Z...DISSIPATED $$ Forecaster Pasch
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