GribStream

NOAA National Blend of Models - Oceanic

Código GribStream: nbmoc

Otras grillas NBM: nbm, nbmak, nbmhi, nbmpr, nbmgu

Estado de NBM v5: NBM v5 ya está operativo en este dataset. En el archivo de GribStream, las ejecuciones anteriores a 2026-05-05 12:00 UTC contienen la versión operativa anterior de NBM; las ejecuciones desde 2026-05-05 12:00 UTC en adelante usan NBM v5.

Los campos de acumulación como APCP, ASNOW y FICEAC, cuando están presentes, continúan a través del rango horario ampliado de NBM v5 y luego siguen con períodos de acumulación más largos en /timeseries, sin huecos ni ventanas duplicadas.

Descripción

NBM Oceanic es la salida regional del National Blend of Models para la zona oceánica. Lleva el postprocesamiento operativo de NOAA a una grilla enfocada en esa zona, en vez de usar la grilla CONUS principal.

NBM combina múltiples fuentes de pronóstico y aplica calibración estadística para producir campos más consistentes que los de un modelo individual sin calibración. El objetivo es entregar una guía más estable para productos operativos y decisiones donde el pronóstico condiciona el riesgo.

El sistema usa técnicas como Model Output Statistics (MOS), mapeo de cuantiles y ponderación de ensemble. En los dominios regionales, esa mezcla permite mantener una guía local útil sin cambiar cómo consultas la API.

En GribStream, nbmoc conserva los códigos de variable, niveles y valores de info del catálogo. Puedes usar los mismos endpoints y selectores que en otros códigos NBM, cambiando solo el código del modelo.

Detalle

Archivo desde: 2020-10-01
Página del producto: https://vlab.noaa.gov/web/mdl/nbm/
Características principales:
- Extiende la guía operativa de NBM v5 al dominio de la zona oceánica.
- Publica ciclos horarios para productos que necesitan actualizaciones frecuentes.
- Combina modelos globales, regionales, determinísticos y de ensemble en una salida calibrada.
- Mantiene los mismos patrones de consulta de GribStream que NBM CONUS, usando su propio código de modelo.
Resolución: Aproximadamente 10 km en la grilla oceánica.
Cobertura temporal: Actualizaciones horarias; los horizontes de pronóstico llegan hasta 264 h, alrededor de 11 días, cuando la fuente publica esos plazos.
Usos principales: Planificación marítima, gestión costera, operaciones costa afuera, rutas de navegación, seguros marítimos, energía, turismo y productos que necesitan guía NBM sobre océano.

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Parámetros

Haz clic en un parámetro para ver sus variantes en una tabla compacta con selectores JSON listos para copiar. Los códigos, niveles y valores de selector se mantienen exactamente como los expone la API.

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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