GribStream

NOAA AIGFS Surface Forecasts

GribStream Code: aigfssfc

Global native-grid GFS 2 meter temperature map with country boundaries
Representative global coverage: GFS 2 m temperature at its native 0.25 degree output spacing, with country boundaries overlaid. This coverage reference was generated from gfs for the aigfssfc page; available variables may differ.

Description

AIGFS Surface is the near-surface dataset from NOAA/NCEP's operational Artificial Intelligence Global Forecast System. NOAA launched AIGFS v1.0 on December 17, 2025, then upgraded the same feed to AIGFS v1.1 with the 2026-07-27 12 UTC cycle. In GribStream's archive, runs through 2026-07-27 06 UTC use v1.0 and runs from 2026-07-27 12 UTC onward use v1.1.

NOAA describes the AI-GFS family as GraphCast-based guidance developed by NCEP with NOAA research laboratories and the Earth Prediction Innovation Center. The system uses NOAA's operational global analysis as its real-time starting point, which makes it useful as an independent AI forecast alongside physics-based models such as GFS.

This surface dataset is the compact AIGFS option for applications that need the most common global weather signals without the full pressure-level atmosphere. It is useful for point forecasts, operational dashboards, medium-range model comparison, renewable-energy screening, route planning, and AI-vs-physics verification workflows.

What is in the surface product

The surface dataset includes 10 m U/V wind components, 2 m temperature, mean sea-level pressure, and accumulated precipitation. It runs on the same 0.25 degree global grid as AIGFS Pressure, with 00, 06, 12, and 18 UTC cycles and 6-hour forecast steps out to 384 hours.

Detail

Parameters

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Click a parameter to reveal variants in a compact table with ready-to-copy JSON selectors.

APCP –Accumulated Precipitation (kg/m^2)
1 variant
NOAA GRIB2 Table 4.2-0-1

Accumulated precipitation represents the total water-equivalent amount of rain and snow during the output period. It is a primary field for hydrologic impacts and event totals.

  • Units: kg/m^2.
  • Use with the model time interval to interpret totals and compare to gauges.
Level Info Horizon Introduced Selector
surface 6h-384h 2026-04-16
{"name":"APCP","level":"surface","info":""}
PRMSL –Pressure Reduced to Mean Sea Level (Pa)
1 variant
NOAA GRIB2 Table 4.2-0-3

Pressure reduced to mean sea level is MSLP computed from surface pressure and temperature. It is used to locate highs and lows.

  • Units: Pa.
Level Info Horizon Introduced Selector
mean sea level 0h-384h 2026-04-16
{"name":"PRMSL","level":"mean sea level","info":""}
TMP –Temperature (K)
1 variant
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 0h-384h 2026-04-16
{"name":"TMP","level":"2 m above ground","info":""}
UGRD –U-Component of Wind (m/s)
1 variant
NOAA GRIB2 Table 4.2-0-2

U‑component of wind is the east‑west component of the horizontal wind. Combine with v for speed and direction.

  • Units: m/s.
  • Combine u and v components to compute speed and direction.
Level Info Horizon Introduced Selector
10 m above ground 0h-384h 2026-04-16
{"name":"UGRD","level":"10 m above ground","info":""}
VGRD –V-Component of Wind (m/s)
1 variant
NOAA GRIB2 Table 4.2-0-2

V‑component of wind is the north‑south component of the horizontal wind. Combine with u for speed and direction.

  • Units: m/s.
  • Combine u and v components to compute speed and direction.
Level Info Horizon Introduced Selector
10 m above ground 0h-384h 2026-04-16
{"name":"VGRD","level":"10 m above ground","info":""}

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