GribStream

NOAA National Blend of Models Parallel - Oceanic

Code GribStream: nbmparoc

Autres grilles NBM Parallel: nbmpar, nbmparak, nbmparhi, nbmparpr, nbmpargu

Statut : NBM v5 est maintenant opérationnel dans GribStream sous nbmoc. Dans nbmoc, 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. Pour les intégrations de production avec NBM v5, utilisez nbmoc ; les datasets nbmpar* restent réservés aux futures itérations expérimentales de NBM si NOAA les republie sur la ligne parallèle.

Le bucket source est noaa-nbm-para-pds. GribStream garde la ligne parallèle sous des codes de dataset dédiés pour que vous puissiez la comparer à la famille NBM opérationnelle sans la mélanger avec l'archive utilisée par vos intégrations courantes.

Références techniques : PNS 25-45, notes de configuration Winter v5.0 et NBM Versions.

Description

NBM Parallel Oceanic est la sortie parallèle publique du National Blend of Models pour le domaine océanique. Elle est conçue pour comparaison et validation lorsque NOAA publie une ligne expérimentale à côté de la version opérationnelle.

Pour la production avec NBM v5, le dataset recommandé est nbmoc. nbmparoc reste une référence de comparaison et un emplacement pour de futures itérations expérimentales que NOAA pourrait publier sur la ligne parallèle.

NBM v5 n'était pas seulement une mise à jour de paramètres. NOAA a étendu une grande partie de la base horaire de prévision de 36 h à 48 h et a révisé le mélange avec davantage de Quantile Mapping, des changements sur les vents et rafales déterministes, et des entrées ECMWF et canadiennes à plus haute résolution.

Pour le domaine océanique, les notes NBM v5 mentionnent des prévisions probabilistes de vent et rafales avec Quantile Mapping, des produits mis à jour pour température, point de rosée et nébulosité, ainsi qu'une correction de la hauteur significative des vagues basée sur Quantile Mapping et un mélange beaucoup plus large de modèles en entrée.

Dans GribStream, nbmparoc conserve des sélecteurs stables : les valeurs de name, level et info sont copiées exactement depuis le catalogue et ne sont pas traduites.

Détails

Archive window: Last 5 days
Source publique: https://registry.opendata.aws/noaa-nbm-parallel/
Caractéristiques principales:
- Permet de comparer la ligne publique parallèle de NBM avec la version opérationnelle lorsque NOAA publie des données parallèles.
- La source garde une rétention courte ; cette ligne sert à la validation, pas à la production ni à une archive historique longue.
- Utilise les mêmes endpoints GribStream que la famille NBM opérationnelle, sous son propre code de dataset.
- Conserve les codes de variables, les niveaux et les valeurs info du catalogue nbmparoc.
Résolution: Environ 10 km sur la grille océanique.
Couverture temporelle: Cycles horaires ; Lead Time (horizon de prévision) de 1 à 264 h lorsque la source publie ces horizons. La ligne parallèle conserve surtout les 5 derniers jours.
Usages principaux: Validation maritime, comparaison de vent, rafales, nébulosité, température, point de rosée et hauteur significative, planification côtière et vérification d'intégrations avant d'utiliser seulement NBM Oceanic opérationnel.

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	5 days ago	`{"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	5 days ago	`{"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	5 days ago	`{"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	5 days ago	`{"name":"GUST","level":"10 m above ground","info":"50% level"}`

PWAT –Precipitable Water (kg/m^2)

9 variants

Precipitable water is the total column water vapor from the surface to the top of the atmosphere. It is a key moisture indicator.

Units: kg/m^2.

Level	Info	Horizon	Introduced	Selector
`entire atmosphere (considered as a single layer)`		1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":""}`
`entire atmosphere (considered as a single layer)`	`10% level`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"10% level"}`
`entire atmosphere (considered as a single layer)`	`50% level`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"50% level"}`
`entire atmosphere (considered as a single layer)`	`90% level`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"90% level"}`
`entire atmosphere (considered as a single layer)`	`prob >12.7`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"prob >12.7"}`
`entire atmosphere (considered as a single layer)`	`prob >25.4`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"prob >25.4"}`
`entire atmosphere (considered as a single layer)`	`prob >38.1`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"prob >38.1"}`
`entire atmosphere (considered as a single layer)`	`prob >50.8`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"prob >50.8"}`
`entire atmosphere (considered as a single layer)`	`prob >63.5`	1h-264h	5 days ago	`{"name":"PWAT","level":"entire atmosphere (considered as a single layer)","info":"prob >63.5"}`

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	5 days ago	`{"name":"TCDC","level":"surface","info":""}`
`surface`	`ens std dev`	2h-264h	5 days ago	`{"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	5 days ago	`{"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	5 days ago	`{"name":"TMP","level":"2 m above ground","info":"50% level"}`
`surface`		2h-264h	5 days ago	`{"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	5 days ago	`{"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	5 days ago	`{"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	5 days ago	`{"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	5 days ago	`{"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	5 days ago	`{"name":"WDIR","level":"10 m above ground","info":""}`
`10 m above ground`	`50% level`	5h-264h	5 days ago	`{"name":"WDIR","level":"10 m above ground","info":"50% level"}`
`10 m above ground`	`75% level`	5h-264h	5 days ago	`{"name":"WDIR","level":"10 m above ground","info":"75% level"}`
`10 m above ground`	`90% level`	5h-264h	5 days ago	`{"name":"WDIR","level":"10 m above ground","info":"90% level"}`
`30 m above ground`	`50% level`	5h-264h	5 days ago	`{"name":"WDIR","level":"30 m above ground","info":"50% level"}`
`80 m above ground`	`50% level`	5h-264h	5 days ago	`{"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	5 days ago	`{"name":"WIND","level":"10 m above ground","info":""}`
`10 m above ground`	`10% level`	2h-264h	5 days ago	`{"name":"WIND","level":"10 m above ground","info":"10% level"}`
`10 m above ground`	`25% level`	2h-264h	5 days ago	`{"name":"WIND","level":"10 m above ground","info":"25% level"}`
`10 m above ground`	`50% level`	2h-264h	5 days ago	`{"name":"WIND","level":"10 m above ground","info":"50% level"}`
`10 m above ground`	`75% level`	2h-264h	5 days ago	`{"name":"WIND","level":"10 m above ground","info":"75% level"}`
`10 m above ground`	`90% level`	2h-264h	5 days ago	`{"name":"WIND","level":"10 m above ground","info":"90% level"}`
`30 m above ground`	`50% level`	2h-264h	5 days ago	`{"name":"WIND","level":"30 m above ground","info":"50% level"}`
`80 m above ground`	`50% level`	2h-264h	5 days ago	`{"name":"WIND","level":"80 m above ground","info":"50% level"}`

Aucun paramètre ne correspond à la recherche.