GribStream

NOAA National Blend of Models - Oceanic

GribStreamコード: nbmoc

他のNBM主要格子: nbm, nbmak, nbmhi, nbmpr, nbmgu

NBM v5ステータス: このデータセットではNBM v5が運用版になっています。GribStreamアーカイブでは、2026-05-05 12:00 UTCより前のモデル実行は以前の運用NBM版を含み、2026-05-05 12:00 UTC以降のモデル実行はNBM v5を使います。

APCP、ASNOW、FICEACのような積算フィールドは、ソースに存在する場合、NBM v5で拡張された1時間ごとの予報範囲を通り、その後は/timeseriesでより長い積算期間に進みます。欠落や重複する期間を作らないように扱います。

概要

NBM Oceanicは、National Blend of ModelsのOceanic領域向け出力です。米国本土の主要格子ではなく、その対象領域に合わせた格子へNOAAの運用後処理を適用します。

NBMは複数の予報ソースを組み合わせ、統計的に較正することで、単一の未較正モデルより一貫したフィールドを作ります。目的は、天候リスクが意思決定に関わる運用プロダクトへ、より安定した予報基盤を提供することです。

システムはMOS（Model Output Statistics）、Quantile Mapping、アンサンブル重み付けなどの手法を使います。地域別のNBMでもAPIワークフローは同じで、対象地域のNBMデータセットを選び、他のNBMコードと同じカタログセレクタを使います。

GribStreamでは、nbmocがカタログの変数コード、level、info値をそのまま保持します。同じエンドポイントとセレクタの形を使い、モデルコードだけを切り替えられます。

詳細

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パラメータをクリックすると、コピーしやすいJSONセレクタ付きのコンパクトな表で候補を確認できます。コード、level、selector値はAPIが公開する値をそのまま保持します。

APTMP –Apparent Temperature (K)
1 variant
NOAA GRIB2 Table 4.2-0-0

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
NOAA GRIB2 Table 4.2-0-0

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
NOAA GRIB2

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
NOAA GRIB2 Table 4.2-0-2

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
NOAA GRIB2 Table 4.2-0-3

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
NOAA GRIB2 Table 4.2-0-6

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
NOAA GRIB2 Table 4.2-0-7

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
NOAA GRIB2 Table 4.2-0-0

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
NOAA GRIB2 Table 4.2-0-1

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
NOAA GRIB2 Table 4.2-0-1

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
NOAA GRIB2

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
NOAA GRIB2 Table 4.2-0-7

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
NOAA GRIB2 Table 4.2-0-2

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
NOAA GRIB2 Table 4.2-0-2

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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