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Post-Tropical Cyclone Beryl Forecast Discussion Number 22

2018-07-16 04:34:16| National Hurricane Center (Atlantic)

Issued at 1100 PM AST Sun Jul 15 2018 295 WTNT42 KNHC 160234 TCDAT2 Post-Tropical Cyclone Beryl Discussion Number 22 NWS National Hurricane Center Miami FL AL022018 1100 PM AST Sun Jul 15 2018 Dry air and shear has prevented the redevelopment of deep convection for more than 12 hours, and what little convection Beryl had early this morning was not very organized. As a result, the system has become post-tropical and this will be the final NHC advisory. The initial intensity of 30 kt is based on a satellite intensity estimate of 25-30 kt from TAFB. Beryl is forecast to remain over marginally warm SSTs in the Gulf Stream overnight, but shear and dry air are expected to prevent organized deep convection from returning. After that time, the remnant low will be moving over much colder waters and a gradual spin down is predicted. The global models indicate that the remnant low will dissipate near southeastern Newfoundland on Tuesday. Beryl is moving east-northeastward at a faster pace than before or 065/11. The cyclone should turn northeastward and accelerate over the next 24 hours as it becomes embedded within low- to mid-level southwesterly flow ahead of an approaching mid-latitude trough. The track models are in good agreement and the new NHC track forecast is near the middle of the tightly clustered guidance envelope. This is the last NHC advisory on this system. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and available on the Web at https://ocean.weather.gov/shtml/NFDHSFAT1.shtml. FORECAST POSITIONS AND MAX WINDS INIT 16/0300Z 38.6N 62.4W 30 KT 35 MPH...POST-TROPICAL 12H 16/1200Z 39.9N 60.7W 30 KT 35 MPH...POST-TROP/REMNT LOW 24H 17/0000Z 42.6N 57.8W 30 KT 35 MPH...POST-TROP/REMNT LOW 36H 17/1200Z 45.5N 55.0W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 18/0000Z...DISSIPATED $$ Forecaster Brown

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Post-Tropical Cyclone Beryl Wind Speed Probabilities Number 22

2018-07-16 04:33:46| National Hurricane Center (Atlantic)

Issued at 0300 UTC MON JUL 16 2018 541 FONT12 KNHC 160233 PWSAT2 POST-TROPICAL CYCLONE BERYL WIND SPEED PROBABILITIES NUMBER 22 NWS NATIONAL HURRICANE CENTER MIAMI FL AL022018 0300 UTC MON JUL 16 2018 AT 0300Z THE CENTER OF POST-TROPICAL CYCLONE BERYL WAS LOCATED NEAR LATITUDE 38.6 NORTH...LONGITUDE 62.4 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 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 00Z MON 12Z MON 00Z TUE 12Z TUE 00Z WED 00Z THU 00Z FRI PERIODS TO TO TO TO TO TO TO 12Z MON 00Z TUE 12Z TUE 00Z WED 00Z THU 00Z FRI 00Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT ILE ST PIERRE 34 X X( X) 5( 5) X( 5) X( 5) X( 5) X( 5) $$ FORECASTER BROWN

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Post-Tropical Cyclone Beryl Public Advisory Number 22

2018-07-16 04:33:45| National Hurricane Center (Atlantic)

Issued at 1100 PM AST Sun Jul 15 2018 530 WTNT32 KNHC 160233 TCPAT2 BULLETIN Post-Tropical Cyclone Beryl Advisory Number 22 NWS National Hurricane Center Miami FL AL022018 1100 PM AST Sun Jul 15 2018 ...BERYL BECOMES A REMNANT LOW... ...THIS IS THE LAST ADVISORY... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...38.6N 62.4W ABOUT 455 MI...735 KM NNE OF BERMUDA ABOUT 420 MI...675 KM S OF HALIFAX NOVA SCOTIA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...ENE OR 65 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1011 MB...29.86 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the center of Post-Tropical Cyclone Beryl was located near latitude 38.6 North, longitude 62.4 West. The post-tropical cyclone is moving toward the east-northeast near 13 mph (20 km/h). A turn toward the northeast and a faster forward speed are expected tomorrow, with this motion continuing through early Tuesday. Maximum sustained winds have decreased to near 35 mph (55 km/h) with higher gusts. Gradual weakening is expected during the next day or so, and the low is forecast to dissipate on Tuesday. The estimated minimum central pressure is 1011 mb (29.86 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on this system. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and available on the Web at http://ocean.weather.gov/shtml/NFDHSFAT1.shtml. $$ Forecaster Brown

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Post-Tropical Cyclone Beryl Forecast Advisory Number 22

2018-07-16 04:33:17| National Hurricane Center (Atlantic)

Issued at 0300 UTC MON JUL 16 2018 140 WTNT22 KNHC 160233 TCMAT2 POST-TROPICAL CYCLONE BERYL FORECAST/ADVISORY NUMBER 22 NWS NATIONAL HURRICANE CENTER MIAMI FL AL022018 0300 UTC MON JUL 16 2018 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. POST-TROPICAL CYCLONE CENTER LOCATED NEAR 38.6N 62.4W AT 16/0300Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE EAST-NORTHEAST OR 65 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1011 MB MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT. 12 FT SEAS.. 90NE 90SE 60SW 0NW. 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 38.6N 62.4W AT 16/0300Z AT 16/0000Z CENTER WAS LOCATED NEAR 38.3N 63.1W FORECAST VALID 16/1200Z 39.9N 60.7W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 17/0000Z 42.6N 57.8W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 17/1200Z 45.5N 55.0W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 18/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 38.6N 62.4W THIS IS THE LAST FORECAST/ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON THIS SYSTEM. ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE...UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC. $$ FORECASTER BROWN

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Subtropical Storm Beryl Forecast Discussion Number 21

2018-07-15 22:34:43| National Hurricane Center (Atlantic)

Issued at 500 PM AST Sun Jul 15 2018 763 WTNT42 KNHC 152034 TCDAT2 Subtropical Storm Beryl Discussion Number 21 NWS National Hurricane Center Miami FL AL022018 500 PM AST Sun Jul 15 2018 Beryl is less organized than 24 h ago, with the cyclone currently comprised of a swirl of low- to mid-level clouds and occasional puffs of convection in the southeastern quadrant. The low-level center has also become completely detached from a large-scale cloud band farther to the east. The initial intensity of 35 kt is based mainly on earlier scatterometer data, and this data was also used to revise the initial wind radii. Beryl has been moving slowly eastward most of the day. However, the last few satellite images suggest a more northward motion is beginning, so the initial motion is an uncertain 075/5. A broad deep-layer mid-latitude trough moving eastward across eastern Canada and the northeastern United States should cause the cyclone to turn northeastward with some acceleration tonight, with a faster northeastward motion expected on Monday and Monday night. The track guidance has shifted to the east on this advisory, so the new forecast track has been adjusted in that direction. However, the new track lies to the west of the center of the guidance envelope and the various consensus models. The new forecast track again keeps the center over the Gulf Stream for 12 h, and the intensity forecast maintains the initial intensity during that time. After that, a quick decay over cold water should occur, and the new intensity forecast now calls for Beryl to dissipate completely between 36-48 h in agreement with the dynamical guidance. The low-level center is still under strong northwesterly vertical shear, and microwave data suggests that dry air has wrapped around the circulation. If these factors prevent the quick re-development of convection, the system could dissipate even earlier than currently forecast. FORECAST POSITIONS AND MAX WINDS INIT 15/2100Z 38.2N 63.8W 35 KT 40 MPH 12H 16/0600Z 39.2N 62.3W 35 KT 40 MPH 24H 16/1800Z 41.3N 59.7W 30 KT 35 MPH...POST-TROP/REMNT LOW 36H 17/0600Z 44.0N 56.8W 25 KT 30 MPH...POST-TROP/REMNT LOW 48H 17/1800Z...DISSIPATED $$ Forecaster Beven

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