GribStream

NOAA National Blend of Models - Oceanic

Código GribStream: nbmoc

NBM 2 meter temperature across its complete oceanic product grid with black boundaries — NBM 2 m temperature across the complete populated footprint at the 10 km spacing used by the oceanic product family, with black boundaries. This coverage reference was generated from nbm for the nbmoc page; available variables may differ.

Outras grades NBM: nbm, nbmak, nbmhi, nbmpr, nbmgu

Status do NBM v5: o NBM v5 já está operacional neste dataset. No arquivo do GribStream, execuções anteriores a 2026-05-05 12:00 UTC contêm a versão operacional anterior do NBM; execuções a partir de 2026-05-05 12:00 UTC usam o NBM v5.

Campos de acumulação como APCP, ASNOW e FICEAC, quando presentes, continuam pela faixa horária ampliada do NBM v5 e depois seguem em /timeseries com períodos de acumulação mais longos, sem lacunas nem janelas duplicadas.

Descrição

NBM Oceanic é a saída regional do National Blend of Models para a região oceânica. Ela leva o pós-processamento operacional da NOAA a uma grade focada nesse domínio, em vez de usar a grade CONUS principal.

O NBM combina várias fontes de previsão e aplica calibração estatística para produzir campos mais consistentes do que os de um modelo individual sem calibração. O objetivo é entregar uma base de previsão mais estável para produtos operacionais e decisões em que o risco meteorológico importa.

O sistema usa técnicas como Model Output Statistics (MOS), Quantile Mapping e ponderação de ensemble. Nos domínios regionais, essa mistura mantém uma orientação local útil sem mudar o jeito de consultar a API.

No GribStream, nbmoc preserva os códigos de variável, níveis e valores de info do catálogo. Você pode usar os mesmos endpoints e seletores dos outros códigos NBM, mudando apenas o código do modelo.

Detalhes

Arquivo desde: 2020-10-01
Página do produto: https://vlab.noaa.gov/web/mdl/nbm/
Principais características:
- Estende a base operacional do NBM v5 para o domínio regional a região oceânica.
- Publica ciclos horários para produtos que precisam de atualização frequente.
- Combina modelos globais, regionais, determinísticos e de ensemble em uma saída calibrada.
- Usa os mesmos padrões de consulta do GribStream que o NBM CONUS, com seu próprio código de dataset.
Resolução: Aproximadamente 10 km na grade oceânica.
Cobertura temporal: Atualizações horárias; os horizontes de previsão chegam a 264 h, cerca de 11 dias, quando a fonte publica esses lead times.
Principais usos: Planejamento marítimo, gestão costeira, operações offshore, rotas de navegação, seguros marítimos, energia, turismo e produtos que precisam de orientação NBM sobre o oceano.

Datasets relacionados

Parâmetros

Clique em um parâmetro para ver as variantes em uma tabela compacta, com seletores JSON prontos para copiar. Códigos, níveis e valores do seletor ficam exatamente como a API expõe.

APTMP –Apparent Temperature (K)

1 variant

Apparent temperature combines air temperature, humidity, and wind to estimate how hot or cold it feels to humans. It is useful for heat and cold stress assessments.

Units: K.

Level	Info	Horizon	Introduced	Selector
`2 m above ground`		2h-264h	2026-05-05	`{"name":"APTMP","level":"2 m above ground","info":""}`

DPT –Dew Point Temperature (K)

1 variant

Dew point temperature is the temperature at which the air becomes saturated. It is a direct measure of moisture content.

Units: K.
When dew point is close to air temperature, fog or low cloud potential increases.

Level	Info	Horizon	Introduced	Selector
`2 m above ground`	`50% level`	2h-264h	2026-05-05	`{"name":"DPT","level":"2 m above ground","info":"50% level"}`

FRZSPR –Freezing Spray Indicator (boolean)

1 variant

Freezing spray indicator flags marine conditions favorable for ice accretion on vessels. It depends on wind, air temperature, and wave conditions.

Units: boolean.

Level	Info	Horizon	Introduced	Selector
`surface`		2h-264h	2024-04-15	`{"name":"FRZSPR","level":"surface","info":""}`

GUST –Wind Speed (Gust) (m/s)

1 variant

Wind gust is the peak short-duration wind speed. It captures brief, hazardous bursts that can exceed sustained winds.

Units: m/s.

Level	Info	Horizon	Introduced	Selector
`10 m above ground`	`50% level`	2h-264h	2020-10-01	`{"name":"GUST","level":"10 m above ground","info":"50% level"}`

HTSGW –Significant Wave Height (m)

5 variants

Significant wave height represents the average height of the highest third of waves. It is the standard metric for sea state and marine hazards.

Units: m.

Level	Info	Horizon	Introduced	Selector
`surface`		2h-240h	2020-10-01	`{"name":"HTSGW","level":"surface","info":""}`
`surface`	`10% level`	2h-240h	2023-01-16	`{"name":"HTSGW","level":"surface","info":"10% level"}`
`surface`	`50% level`	2h-240h	2023-01-16	`{"name":"HTSGW","level":"surface","info":"50% level"}`
`surface`	`90% level`	2h-240h	2023-01-16	`{"name":"HTSGW","level":"surface","info":"90% level"}`
`surface`	`ens std dev`	2h-240h	2020-10-01	`{"name":"HTSGW","level":"surface","info":"ens std dev"}`

TCDC –Total Cloud Cover (percent)

2 variants

Total cloud cover is the fraction of the grid cell covered by clouds at any level. It influences radiation, temperature, and visibility.

Units: percent.
Cloud fraction influences surface radiation and temperature.

Level	Info	Horizon	Introduced	Selector
`surface`		2h-264h	2026-05-05	`{"name":"TCDC","level":"surface","info":""}`
`surface`	`ens std dev`	2h-264h	2026-05-05	`{"name":"TCDC","level":"surface","info":"ens std dev"}`

THUNC –Thunderstorm Probability (percent)

1 variant

Thunderstorm probability gives the chance of thunderstorms during the valid period. It is used for convective hazard guidance.

Units: percent.

Level	Info	Horizon	Introduced	Selector
`entire atmosphere`		1h-36h	2023-01-16	`{"name":"THUNC","level":"entire atmosphere","info":""}`

TMP –Temperature (K)

2 variants

Air temperature is the thermal state of the atmosphere at the specified level. It influences density, stability, and energy exchange.

Units: K.

Level	Info	Horizon	Introduced	Selector
`2 m above ground`	`50% level`	2h-264h	2020-10-01	`{"name":"TMP","level":"2 m above ground","info":"50% level"}`
`surface`		2h-264h	2020-10-01	`{"name":"TMP","level":"surface","info":""}`

TPWDIR –Total Precipitable Water Transport Direction (degrees)

1 variant

Total precipitable water transport direction is the direction of column‑integrated moisture flux. It indicates moisture transport pathways.

Units: degrees.

Level	Info	Horizon	Introduced	Selector
`10 m above ground`		2h-167h	2024-05-14	`{"name":"TPWDIR","level":"10 m above ground","info":""}`

TPWSPD –Total Precipitable Water Transport Speed (m/s)

1 variant

Total precipitable water transport speed is the magnitude of column‑integrated moisture transport. It highlights atmospheric river strength.

Units: m/s.

Level	Info	Horizon	Introduced	Selector
`10 m above ground`		2h-167h	2024-05-14	`{"name":"TPWSPD","level":"10 m above ground","info":""}`

TSTM –Thunderstorm Indicator (boolean)

1 variant

Thunderstorm indicator flags the presence of thunderstorm conditions in the grid cell. It is used as a categorical hazard field.

Units: boolean.

Level	Info	Horizon	Introduced	Selector
`surface`	`probability forecast`	1h-192h	2020-10-01	`{"name":"TSTM","level":"surface","info":"probability forecast"}`

VIS –Visibility (m)

1 variant

Horizontal visibility at the surface. Lower values indicate reduced visibility due to fog, precipitation, or aerosols.

Units: m.

Level	Info	Horizon	Introduced	Selector
`surface`	`50% level`	2h-264h	2020-10-01	`{"name":"VIS","level":"surface","info":"50% level"}`

WDIR –Wind Direction (degrees)

6 variants

Wind direction indicates the direction from which the wind is blowing at the specified level.

Units: degrees.

Level	Info	Horizon	Introduced	Selector
`10 m above ground`		5h-264h	2020-10-01	`{"name":"WDIR","level":"10 m above ground","info":""}`
`10 m above ground`	`50% level`	5h-264h	2020-10-01	`{"name":"WDIR","level":"10 m above ground","info":"50% level"}`
`10 m above ground`	`75% level`	5h-264h	2020-10-01	`{"name":"WDIR","level":"10 m above ground","info":"75% level"}`
`10 m above ground`	`90% level`	5h-264h	2020-10-01	`{"name":"WDIR","level":"10 m above ground","info":"90% level"}`
`30 m above ground`	`50% level`	5h-264h	2020-10-01	`{"name":"WDIR","level":"30 m above ground","info":"50% level"}`
`80 m above ground`	`50% level`	5h-264h	2020-10-01	`{"name":"WDIR","level":"80 m above ground","info":"50% level"}`

WIND –Wind Speed (m/s)

8 variants

Wind speed is the magnitude of the horizontal wind at the specified level. It is used for transport, mixing, and hazards.

Units: m/s.

Level	Info	Horizon	Introduced	Selector
`10 m above ground`		5h-264h	2020-10-01	`{"name":"WIND","level":"10 m above ground","info":""}`
`10 m above ground`	`10% level`	2h-264h	2020-10-01	`{"name":"WIND","level":"10 m above ground","info":"10% level"}`
`10 m above ground`	`25% level`	2h-264h	2020-10-01	`{"name":"WIND","level":"10 m above ground","info":"25% level"}`
`10 m above ground`	`50% level`	2h-264h	2020-10-01	`{"name":"WIND","level":"10 m above ground","info":"50% level"}`
`10 m above ground`	`75% level`	2h-264h	2020-10-01	`{"name":"WIND","level":"10 m above ground","info":"75% level"}`
`10 m above ground`	`90% level`	2h-264h	2020-10-01	`{"name":"WIND","level":"10 m above ground","info":"90% level"}`
`30 m above ground`	`50% level`	2h-264h	2020-10-01	`{"name":"WIND","level":"30 m above ground","info":"50% level"}`
`80 m above ground`	`50% level`	2h-264h	2020-10-01	`{"name":"WIND","level":"80 m above ground","info":"50% level"}`

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