Weather · Analysis
HRRR national weather field
Temperature, hub-height wind speed and surface irradiance every hour at 19,080 points across the continental United States — the three weather series that load, wind output and solar output are functions of, at one resolution across every grid operator rather than one. Read from NOAA's HRRR analysis on Open Data Dissemination: a US government work, public domain, no attribution owed.
noaa-hrrr-fieldhourly · 1h rows19,080 entitiesWhat is in it
- Updates
- hourly · 1h rows
- Entities
- 19,080 entities — H_0200_0970, H_0670_1170, H_0700_1550…
- Source timezone
- UTC — every timestamp Dryos serves is UTC
- Coverage
- 18 September 2026 to now
- Rows held
- 19,080
- Primary key
- cell, interval_start_utc
- On the map
- 19,080 of 19,080 placed
What it measures
Every value, its unit, and what the source means by it.
- Temperature°C
Air temperature at 2 m — the series load is a function of. Published in kelvin and converted on read.
temp_c - Wind speedm/s
Wind speed at 80 m, HRRR's hub-height level — the field that matters for wind generation. The Texas wind field beside this one publishes 100 m, which is a different number.
wind_speed_80m_ms - IrradianceW/m²
Downward short-wave radiation at the surface — what reaches a solar panel. Zero at night, which is a reading and not a gap.
irradiance_wm2 - Wind, eastwardm/s
Eastward wind component at 80 m, resolved against HRRR's Lambert grid rather than true north. Stored verbatim so the rotation to a compass bearing can be checked from the table; a direction taken from it unrotated is wrong by up to 17° at the edges of the map.
wind_u_80m_ms - Wind, northwardm/s
Northward wind component at 80 m, in the same grid-relative frame as the eastward component beside it.
wind_v_80m_ms
Columns
Exactly what a request answers with, read from the API rather than written here.
| Column | Type | Description |
|---|---|---|
| interval_start_utcrequired | timestamp | Start of the hour the values describe, UTC.e.g. 2026-08-31T12:00:00Z |
| cellrequired | string | Grid cell id: H_0500_0900 is row 500, column 900 of HRRR's native 1059 x 1799 grid. The index is the native one even though the stream samples every tenth point, so a cell keeps its id if the sampling ever changes. HRRR is a Lambert projection, so unlike the Texas wind field's ids this one cannot encode its own latitude and longitude — they are columns instead.e.g. H_0500_0900 |
| temp_crequired | number | Air temperature at 2 m, degrees Celsius. Published in kelvin and converted on read.e.g. 24.8 |
| wind_speed_80m_msrequired | number | Wind speed at 80 m, metres per second — HRRR's hub-height level, and the field that matters for wind generation. Derived as the magnitude of the two components below, which is the same number whichever frame they are resolved in.e.g. 8.7 |
| wind_u_80m_msrequired | number | Eastward wind component at 80 m, metres per second, **relative to HRRR's Lambert grid and not to true north** (uvRelativeToGrid = 1). A compass bearing taken from this and the northward component without rotating them by n(lon - lon0) is wrong by up to 17 degrees at the edges of the country and correct down the middle of it.e.g. -3.1 |
| wind_v_80m_msrequired | number | Northward wind component at 80 m, metres per second, in the same grid-relative frame as the eastward component beside it.e.g. 6.4 |
| irradiance_wm2required | number | Downward short-wave radiation flux at the surface, watts per square metre — what reaches a solar panel. Zero at night, and that is a reading rather than a gap.e.g. 612.4 |
| latrequired | number | Latitude of the reading, degrees north. Published by the source, not inferred: this is where the instrument is or the point that was sampled.e.g. 30.19 |
| lonrequired | number | Longitude of the reading, degrees east of Greenwich.e.g. -97.67 |
| collected_at_utcrequired | timestamp | When Dryos collected this row, UTC. Stamped by the platform, not the collector.e.g. 2026-08-31T13:02:00Z |
Read it
Public, read-only, no key and no sign-up. Relative times stay relative, so a URL keeps working.
The newest rows
curl "https://api.dryos.ai/v1/datasets/noaa-hrrr-field/query?node=H_0200_0970&limit=12"The catalogue entry — every column, its type and the source
curl "https://api.dryos.ai/v1/datasets/noaa-hrrr-field"Full parameters — bucketing, aggregation, filters and search — are on the API reference.
Ask an agent
The same stream through the Model Context Protocol, so Claude, ChatGPT, Cursor or any MCP client can query it directly.
claude mcp add --transport http dryos https://api.dryos.ai/mcpThen ask:
What has Temperature been at H_0200_0970 over the last 24 hours, and when did it peak?
Setup for every client is on the MCP server page.
How this stream is checked
- Pulled straight from NOAA · High-Resolution Rapid Refresh, via Open Data Dissemination — no reseller in between — and compared against that file before it is served.
- Null means the source did not report it — never zero.
- A reading lands hourly; the interval timestamp is the start of the interval, in UTC.
- Every weather timestamp is UTC at the source and at Dryos.
Related streams
- Surface observations
What the weather actually did: temperature, dew point, wind, pressure and visibility from 25 airport stations across the eight ERCOT weather zones.
hourly, plus specials · 1h rows25 entitiesnoaa-station-observations - Hourly forecast by weather zone
Seven days of hourly forecast sampled at each ERCOT weather zone — including wind at 100 m and surface irradiance, the two variables that predict wind and solar output and that no NOAA endpoint publishes.
hourly, 7 days ahead · 1h rows8 entitiesopenmeteo-zone-forecast - NWS forecast by weather zone
The National Weather Service's own forecast for the same eight zones — the official record, sampled at the same points as the Open-Meteo stream so the two are directly comparable.
reissued through the day · 1h rows8 entitiesnoaa-gridpoint-forecast - Hub-height wind field
Wind speed and direction at 100 m on a one-degree grid across Texas and its surroundings — the field itself, to be drawn rather than charted.
every 3 hours · 1h rows168 entitiesopenmeteo-wind-field