GribStream

NOAA National Blend of Models - Oceanic

Code GribStream: nbmoc

Autres grilles NBM: nbm, nbmak, nbmhi, nbmpr, nbmgu

Statut NBM v5 : NBM v5 est maintenant opérationnel dans ce dataset. Dans l'archive GribStream, les runs antérieurs à 2026-05-05 12:00 UTC contiennent la version opérationnelle précédente de NBM ; les runs à partir de 2026-05-05 12:00 UTC utilisent NBM v5.

Les champs d'accumulation comme APCP, ASNOW et FICEAC, lorsqu'ils sont présents, parcourent la plage horaire étendue de NBM v5 puis continuent dans /timeseries avec des périodes d'accumulation plus longues, sans trous ni fenêtres dupliquées.

Description

NBM Oceanic est la sortie régionale du National Blend of Models pour le domaine océanique. Elle applique le post-traitement opérationnel de la NOAA à une grille adaptée à ce domaine, au lieu d'utiliser la grille CONUS principale.

NBM combine plusieurs sources de prévision et les calibre statistiquement pour produire des champs plus cohérents qu'un modèle individuel non calibré. L'objectif est une base de prévision plus stable pour les produits opérationnels et les décisions où le risque météorologique compte.

Le système utilise des techniques comme Model Output Statistics (MOS), Quantile Mapping et pondération d'ensemble. Dans les domaines régionaux, le schéma API reste identique : choisissez le dataset NBM régional et utilisez les sélecteurs du catalogue comme pour les autres codes NBM.

Dans GribStream, nbmoc conserve les codes de variables, les niveaux et les valeurs info du catalogue. Vous pouvez utiliser les mêmes endpoints et schémas de sélecteur, en changeant seulement le code du modèle.

Détails

Archive begins: 2020-10-01
Page produit: https://vlab.noaa.gov/web/mdl/nbm/
Caractéristiques principales:
- Étend la base opérationnelle NBM v5 à un domaine régional hors de la grille CONUS principale.
- Publie des cycles horaires pour les produits qui ont besoin de mises à jour fréquentes.
- Combine modèles globaux, régionaux, déterministes et modèles d'ensemble dans une sortie calibrée.
- Utilise les mêmes schémas de requête GribStream que NBM CONUS, avec son propre code de dataset.
Résolution: Environ 10 km sur la grille océanique.
Couverture temporelle: Mises à jour horaires ; les horizons de prévision vont jusqu'à 264 h, environ 11 jours, lorsque la source publie ces Lead Times.
Usages principaux: Planification maritime, gestion côtière, opérations offshore, routage de navires, assurance maritime, énergie, tourisme et produits qui ont besoin de la base de prévision NBM sur zones océaniques.

Datasets liés

Paramètres

Cliquez sur un paramètre pour voir ses variantes dans une table compacte avec des sélecteurs JSON prêts à copier. Les codes, niveaux et valeurs de sélecteur restent exactement tels que l'API les expose.

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"}`

Aucun paramètre ne correspond à la recherche.