Name: NOAA AIGFS Pressure-Level Forecasts via GribStream
Creator: NOAA
License: https://www.noaa.gov/disclaimer

Description

AIGFS Pressure is the upper-air 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, giving forecast teams an AI-based comparison point next to GFS, GEFS, ECMWF guidance, and other global datasets.

This pressure-level dataset is the right AIGFS choice when an application needs the structure of the atmosphere above the surface: steering flow, thermal profiles, humidity layers, mid- and upper-level waves, and vertical motion. Typical uses include synoptic analysis, trajectory screening, medium-range forecast dashboards, AI-vs-physics verification, and building weather products that consume pressure-level signals.

What is in the pressure product

The pressure-level dataset carries U/V wind, temperature, geopotential height, specific humidity, and pressure vertical velocity across 13 standard levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 850, 925, and 1000 mb. It runs on a 0.25 degree global grid with 00, 06, 12, and 18 UTC cycles and 6-hour forecast steps out to 384 hours.

Detail

Archive begins: 2026-04-16

Public data source: NOAA EAGLE AWS Open Data bucket

Product inventory: NCEP AIGFS products

Operational distribution: NCEP NOMADS AIGFS

Current-version notice: NWS SCN 26-68, AIGFS v1.1

Launch notice: NWS SCN 25-89

Technical background: NOAA/NCEP Office Note 521

Resolution: 0.25° global grid

Vertical levels: 50, 100, 150, 200, 250, 300, 400, 500, 600, 700, 850, 925, and 1000 mb

Cycles: 00, 06, 12, 18 UTC

Forecast cadence and length: 6-hour steps to 384 hours

Companion datasets: AIGFS Surface, AIGEFS Pressure

Parameters

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

HGT –Geopotential Height (gpm)

13 variants

Geopotential height is the altitude of a pressure surface in the atmosphere. It is the primary field for identifying ridges, troughs, and large‑scale flow patterns.

Units: gpm.

Level	Horizon	Introduced	Selector
`100 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"100 mb","info":""}`
`1000 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"1000 mb","info":""}`
`150 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"150 mb","info":""}`
`200 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"200 mb","info":""}`
`250 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"250 mb","info":""}`
`300 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"300 mb","info":""}`
`400 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"400 mb","info":""}`
`50 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"50 mb","info":""}`
`500 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"500 mb","info":""}`
`600 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"600 mb","info":""}`
`700 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"700 mb","info":""}`
`850 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"850 mb","info":""}`
`925 mb`	0h-384h	2026-04-16	`{"name":"HGT","level":"925 mb","info":""}`

SPFH –Specific Humidity (kg/kg)

13 variants

Specific humidity is the mass of water vapor per mass of air at the specified level. It is central to moisture transport.

Units: kg/kg.
Higher values indicate more atmospheric moisture and greater cloud or precip potential.

Level	Horizon	Introduced	Selector
`100 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"100 mb","info":""}`
`1000 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"1000 mb","info":""}`
`150 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"150 mb","info":""}`
`200 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"200 mb","info":""}`
`250 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"250 mb","info":""}`
`300 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"300 mb","info":""}`
`400 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"400 mb","info":""}`
`50 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"50 mb","info":""}`
`500 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"500 mb","info":""}`
`600 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"600 mb","info":""}`
`700 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"700 mb","info":""}`
`850 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"850 mb","info":""}`
`925 mb`	0h-384h	2026-04-16	`{"name":"SPFH","level":"925 mb","info":""}`

TMP –Temperature (K)

13 variants

Air temperature is the thermal state of the atmosphere at the specified level. It influences density, stability, and energy exchange.

Units: K.

Level	Horizon	Introduced	Selector
`100 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"100 mb","info":""}`
`1000 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"1000 mb","info":""}`
`150 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"150 mb","info":""}`
`200 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"200 mb","info":""}`
`250 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"250 mb","info":""}`
`300 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"300 mb","info":""}`
`400 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"400 mb","info":""}`
`50 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"50 mb","info":""}`
`500 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"500 mb","info":""}`
`600 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"600 mb","info":""}`
`700 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"700 mb","info":""}`
`850 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"850 mb","info":""}`
`925 mb`	0h-384h	2026-04-16	`{"name":"TMP","level":"925 mb","info":""}`

UGRD –U-Component of Wind (m/s)

13 variants

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	Horizon	Introduced	Selector
`100 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"100 mb","info":""}`
`1000 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"1000 mb","info":""}`
`150 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"150 mb","info":""}`
`200 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"200 mb","info":""}`
`250 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"250 mb","info":""}`
`300 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"300 mb","info":""}`
`400 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"400 mb","info":""}`
`50 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"50 mb","info":""}`
`500 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"500 mb","info":""}`
`600 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"600 mb","info":""}`
`700 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"700 mb","info":""}`
`850 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"850 mb","info":""}`
`925 mb`	0h-384h	2026-04-16	`{"name":"UGRD","level":"925 mb","info":""}`

VGRD –V-Component of Wind (m/s)

13 variants

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	Horizon	Introduced	Selector
`100 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"100 mb","info":""}`
`1000 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"1000 mb","info":""}`
`150 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"150 mb","info":""}`
`200 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"200 mb","info":""}`
`250 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"250 mb","info":""}`
`300 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"300 mb","info":""}`
`400 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"400 mb","info":""}`
`50 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"50 mb","info":""}`
`500 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"500 mb","info":""}`
`600 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"600 mb","info":""}`
`700 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"700 mb","info":""}`
`850 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"850 mb","info":""}`
`925 mb`	0h-384h	2026-04-16	`{"name":"VGRD","level":"925 mb","info":""}`

VVEL –Vertical Velocity (Pressure) (Pa/s)

13 variants

Vertical velocity in pressure coordinates (omega). Negative values indicate upward motion (rising air); positive values indicate subsidence.

Units: Pa/s.

Level	Horizon	Introduced	Selector
`100 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"100 mb","info":""}`
`1000 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"1000 mb","info":""}`
`150 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"150 mb","info":""}`
`200 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"200 mb","info":""}`
`250 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"250 mb","info":""}`
`300 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"300 mb","info":""}`
`400 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"400 mb","info":""}`
`50 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"50 mb","info":""}`
`500 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"500 mb","info":""}`
`600 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"600 mb","info":""}`
`700 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"700 mb","info":""}`
`850 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"850 mb","info":""}`
`925 mb`	0h-384h	2026-04-16	`{"name":"VVEL","level":"925 mb","info":""}`

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