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Rodolfo Alves

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About Rodolfo Alves

  • Birthday 01/07/1992

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  1. ALPHA CHEGOU AO LANDFALL EM PORTUGAL. TORNANDO-SE O PRIMEIRO SISTEMA OFICIALMENTE ATIVO A FAZER LANDFALL NAQUELE PAÍS. BULLETIN Subtropical Storm Alpha Advisory Number 2 NWS National Hurricane Center Miami FL AL242020 900 PM GMT Fri Sep 18 2020 ...ALPHA MAKES LANDFALL IN PORTUGAL... ...EXPECTED TO DISSIPATE ON SATURDAY... SUMMARY OF 900 PM GMT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...40.4N 8.4W ABOUT 120 MI...195 KM NNE OF LISBON PORTUGAL MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES Subtropical Storm Alpha Discussion Number 2 NWS National Hurricane Center Miami FL AL242020 900 PM GMT Fri Sep 18 2020 Radar data from Portugal indicated that Alpha made landfall at about 1830 UTC with a fairly impressive spiral band signature. It is estimated that the winds were 45 kt at landfall, and a sustained 10-minute wind of 39 kt was recorded at Sao Pedro de Noel. The minimum central pressure is analyzed at 996 mb at landfall due to a 999 mb value at Monte Real with a 31-kt sustained wind. Since these data were recorded, the radar presentation has deteriorated, and satellite imagery suggests the small cyclone could be de-coupling from its mid-level center. The winds are assumed to have come down, with a current estimate of 40 kt. The small cyclone should continue to move northeastward at about 15 kt for the next 12-24 hours before dissipating over northern Spain or the Bay of Biscay. No significant changes are required to the forecast for track or intensity. Additional information on the hazards from this system can be found in products from the Portuguese Institute for Sea and Atmosphere at www.ipma.pt. FORECAST POSITIONS AND MAX WINDS INIT 18/2100Z 40.4N 8.4W 40 KT 45 MPH...INLAND 12H 19/0600Z 42.1N 6.1W 25 KT 30 MPH...POST-TROP/INLAND 24H 19/1800Z...DISSIPATED CHUVA LOCALMENTE FORTE ATINGE O INTERIOR DE PORTUGAL AGORA. MONTE REAL, PRÓXIMO DO LOCAL AONDE A TEMPESTADE SUBTROPICAL ALPHA FEZ LANDFALL REGISTROU RAJADA DE 90km/h
  2. NHC DESIGNA OFICIALMENTE A TEMPESTADE TROPICAL BETA
  3. Rodolfo Alves

    Monitoramento e previsão Europa - 2020

    MAIORES ACUMULADOS DE CHUVA E RAJADAS DE VENTO REPORTARDOS NA GRÉCIA PELAS IMAGENS DE SATÉLITE A IANOS VAI SE DISSIPANDO DENTRO DA GRÉCIA.
  4. BOLETIM OFICIAL DO IPMA (INMET DE PORTUGAL): Informação especial Comunicado válido entre 2020-09-18 16:47:00 e 2020-09-18 23:59:00 Assunto: Ciclone subtropical Alpha A depressão centrada junto à costa do distrito de Leiria, ganhou características subtropicais durante a tarde, revelando uma estrutura organizada nas imagens de satélite. O NHC contatou o IPMA no sentido de ser feita uma avaliação conjunta da situação, tendo-se optado por nomear o ciclone. Esse ciclone foi nomeado de Alpha. Segundo as projeções dos diferentes modelos, após a entrada em terra, o Alpha deverá perder rapidamente intensidade. Com a aproximação da depressão à costa foi possível monitorizar o ciclone com o auxílio do sistema de radar, sendo possível identificar ventos de intensidade muito elevada em altitude, mas relativamente próximo da superfície. Tendo em conta os elementos disponíveis no momento, foi decidido elevar o nível de aviso para laranja os avisos de vento, precipitação e trovoada nos distritos diretamente afetados, Leiria e Coimbra. Tendo em conta o agravar da situação meteorológica, recomenda-se o acompanhamento da previsão e avisos meteorológicos ao longo das próximas horas, consultando: http://www.ipma.pt/pt/otempo/prev.descritiva/ http://www.ipma.pt/pt/otempo/prev.significativa http://www.ipma.pt/pt/otempo/prev-sam/ Para mais detalhes sobre a previsão para a navegação marítima consultar: http://www.ipma.pt/pt/maritima/boletins/
  5. BELAS IMAGENS DE RADAR E SATÉLITE DA TEMPESTADE SUBTROPICAL ALPHA. ALPHA IRÁ FAZER LANDFALL NAS PRÓXIMAS HORAS SOBRE PORTUGAL. ISSO TORNARÁ O PRIMEIRO SISTEMA NA FASE SUBTROPICAL/TROPICAL A FAZER LANDFALL COMO JÁ DITO. DISCUSSÃO DO NHC MENCIONA QUE ALPHA GANHOU FORÇA NAS ÚLTIMAS HORAS, COM MAIORES EVIDÊNCIAS DE SER UMA TEMPESTADE SUBTROPICAL A PARTIR DO SCARTOMETRO E DE IMAGENS DE RADAR DE PORTUGAL. Subtropical Storm Alpha Special Discussion Number 1 NWS National Hurricane Center Miami FL AL242020 430 PM GMT Fri Sep 18 2020 The small low pressure area that has been rotating around a larger extratropical low in the far northeastern Atlantic has become better organized this morning. Moderate-to-deep convection has persisted near the center since last night, scatterometer data shows a closed 40-kt low, and radar images from Portugal show a definite organized convective pattern. While the system is still in the cyclonic envelope of the large extratropical low and likely neutral- or cold-core, it has developed enough tropical characteristics to be considered a subtropical storm. The initial intensity is set to 45 kt in accordance with the scatterometer data, assuming some undersampling for this small system. Little change in strength is forecast until landfall in Portugal during the next couple of hours. Global models show the small low moving northeastward at about 15 kt for the next 24 hours before dissipating over northern Spain or the Bay of Biscay. The track and intensity forecasts are consistent with the consensus guidance. Additional information on the hazards from this system can be found in products from the Portuguese Institute for Sea and Atmosphere at www.ipma.pt.
  6. Rodolfo Alves

    Monitoramento e previsão Europa - 2020

    ÚLTIMA DISCUSSÃO DO ESTOFEX: Mesoscale Discussion Valid: Thu 17 Sep 2020 19:00 to Fri 18 Sep 2020 06:00 UTC Issued: Thu 17 Sep 2020 19:56 Forecaster: ESTOFEX + + + AMENDED + + + The bulletin was amended to include recent scatterometer data in the intensity analysis + + + The cyclone has almost reached hurricane strength. It has strengthened significantly after widespread deep convection developed in all quadrants and its satellite representation features spiral bands and occasional hints of an eye forming. Winds around the centre are estimated to have risen to near 30 m/s with higher gusts. Scatterometer data at a large distance from the centre indicate winds of 25 m/s. The central pressure is estimated to be near 986 mb. A little more intensification is expected in the next 6 hours. The cyclone has gradually moved eastward during the day, slightly faster than most model guidance, and is expected to be very close to the southern Ionian islands tomorrow morning at 06 UTC. By then, it should slow down and become almost stationary. Model guidance remains very divided about its fate, with some models like ICON let the cyclone disspate fully, whereas others, including GFS and ECMWF, predict it to move back onto sea to the south or even south-southwest. The forecast reflects the latter scenario. The wind is picking up across the coastal area of western Greece, with Kefalonia airport reporting a 15 m/s south-easterly wind with gusts to 20 m/s at 1800 UTC. The southern Ionian islands of Kefalonia and Zakynthos will likely experience hurricane-force or near-hurricane force winds, with gusts likely in the 40-50 m/s (144-180 km/h) range, and possibly higher across the mountains. Winds of similar strength or only marginally weaker will be experienced along the coastline of the Gulf of Patras from Astakos via Patras to Pyrgos and possibly further south to Kyparissia. A major risk with the cyclone are extreme amounts of precipitation and the attendant risk of flash flooding. Across large parts of the Peloponnese and Central Greece rainfall will exceed 200 mm, whereas near the cyclone's centre more than 400 mm may accumulate locally as it stalls near the Gulf of Patras. Another area at risk of extreme precipitation and flash floods are the eastern slopes of the Pindus mountains, where strong easterly upslope flow of humid air is expected, and result in accumulations around or above 400 mm in some areas. Finally, a risk of tornadoes exists with embedded convective storms east and northeast of the cyclone centre. The area of highest storm-relative helicity in the 0-1 km layer has gradually shifted a bit northward in the latest model guidance. Hence the threat now seems highest in a wide area surrounding the Gulf of Patras.
  7. Rodolfo Alves

    Monitoramento e previsão Europa - 2020

    RAJADAS DE 80km/h JÁ SÃO OBSERVADAS NO OESTE DA GRÉCIA, EM KEFALLINIA.
  8. BULLETIN Hurricane Teddy Advisory Number 22 NWS National Hurricane Center Miami FL AL202020 500 PM AST Thu Sep 17 2020 ...TEDDY STRENGTHENS TO A POWERFUL CATEGORY FOUR HURRICANE... ...LARGE SWELLS FORECAST TO SPREAD ACROSS MUCH OF THE WESTERN ATLANTIC INTO THIS WEEKEND INCREASING RIP CURRENT THREAT... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...20.1N 54.1W ABOUT 575 MI...925 KM NE OF THE LESSER ANTILLES ABOUT 1070 MI...1725 KM SE OF BERMUDA MAXIMUM SUSTAINED WINDS...140 MPH...220 KM/H PRESENT MOVEMENT...NW OR 315 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...945 MB...27.91 INCHES
  9. Rodolfo Alves

    Monitoramento e previsão Europa - 2020

    ÚLTIMA PASSAGEM DO SCARTÔMETRO SOBRE IANOS . VENTOS DE 45 A 50 NÓS SÃO OBSERVADOS
  10. Rodolfo Alves

    Monitoramento e previsão Europa - 2020

    ÚLTIMAS IMAGENS DE SATÉLITE NÃO MOSTRAM UMA GRANDE INTENSIFICAÇÃO DE CASSILDA/IANOS NESSA NOITE/MADRUGADA NA EUROPA. É POSSÍVEL OBSERVAR QUE O CENTRO DA BAIXA É EXPOSTO E COM ALGUM RAMO DE CONVECÇÃO APENAS NA PARTE OESTE E NORTE DA BAIXA. IMAGENS EM VAPOR DÁGUA MOSTRAM QUE HÁ ENTRADA SIGNIFICATIVA DE AR SECO DENTRO DO "CORE" DA BAIXA, O QUE DIFICULTA UMA EVOLUÇÃO PARA TROPICAL. NESTE MOMENTO O MAIS PROVÁVEL É QUE O "MEDICANE" SEJA UMA TEMPESTADE SUBTROPICAL. ] A ÚLTIMA PASSAGEM DO SCARTOMETRO MOSTRA QUE A BAIXA TEM VENTOS SUSTENTADOS DE 40-45 NÓS (74-83km/h). A PRESSÃO MINIMA ESTIMADA É DE 995hpas PELO ESTOFEX.
  11. Rodolfo Alves

    Monitoramento e previsão Europa - 2020

    SERVIÇO METEOROLÓGICO DA GRÉCIA EMITINDO ALERTA VERMELHO PARA CHUVA FORTE E TROVOADAS
  12. TEMPESTADE TROPICAL NOUL SE FORMOU A OESTE DAS FILIPINAS. PODE VIRAR TUFÃO CATEGORIA 1 ANTES DE FAZER LANDFALL NO VIETNÃ NA SEXTA-FEIRA
  13. Rodolfo Alves

    Monitoramento e previsão Europa - 2020

    SAÍDA 12Z DO ECMWF PROJETANDO ACUMULADOS DE 300mm LOCALMENTE, COM RAJADAS DE VENTO ACIMA DOS 100km/h NA GRÉCIA. BASTANTE SEVERO. ACUMULADO DE CHUVA(mm): RAJADAS DE VENTO MÁXIMO (km/h): ONDAS PODEM CHEGAR A 7 METROS TAMBÉM
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