CAISO · Load
CAISO fifteen-minute load forecast
The load forecast behind CAISO's fifteen-minute market, posted about 25 minutes ahead, for its own areas and every Western EIM balancing authority.
caiso-load-forecast-15minevery 15 min, ~25 min ahead · 15m rows37 entitiesWhat is in it
- Updates
- every 15 min, ~25 min ahead · 15m rows
- Entities
- 37 entities — CA ISO-TAC, PGE-TAC, SCE-TAC…
- Source timezone
- US Pacific — every timestamp Dryos serves is UTC
- Coverage
- 14 September 2026 to now
- Rows held
- 12,802
- Primary key
- iso, zone, interval_start_utc
What it measures
Every value, its unit, and what the source means by it.
- ForecastMW
Forecast load for the area and interval.
load_mw
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 interval, UTC, read from OASIS's GMT column.e.g. 2026-09-14T20:00:00Z |
| isorequired | string | Publishing ISO.e.g. CAISO |
| zonerequired | string | Load area as CAISO names it (TAC_AREA_NAME): CAISO's own areas PGE-TAC, SCE-TAC, SDGE-TAC, VEA-TAC and MWD-TAC; CA ISO-TAC, which is their sum; and each Western EIM balancing authority (PACE, BPAT, AZPS…).e.g. PGE-TAC |
| load_mwrequired | number | Load for the area, MW.e.g. 9086.18 |
| source_published_at_utc | timestamp | When CAISO published the row, UTC. |
| collected_at_utcrequired | timestamp | When Dryos collected this row, UTC. Stamped by the platform, not the collector.e.g. 2026-09-14T17:37:12Z |
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/caiso-load-forecast-15min/query?node=CA%20ISO-TAC&limit=12"The catalogue entry — every column, its type and the source
curl "https://api.dryos.ai/v1/datasets/caiso-load-forecast-15min"Hourly averages for the last day
curl "https://api.dryos.ai/v1/datasets/caiso-load-forecast-15min/query?node=CA%20ISO-TAC&start=-24h&interval=1h&agg=avg"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 Forecast been at CA ISO-TAC over the last 24 hours, and when did it peak?
Setup for every client is on the MCP server page.
Changes to this collector
A change in the collector is a change in the data. Anyone reading a step in a series is owed the day it moved under them.
- 2026-09-14
First collected, from CAISO OASIS.
Load by area at every grain CAISO publishes it.
How this stream is checked
- Pulled straight from CAISO OASIS · SLD_FCST (RTM, RTPD) — 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 every 15 min, ~25 min ahead; the interval timestamp is the start of the interval, in UTC.
- CAISO's market clock is US Pacific; OASIS answers in UTC. Every timestamp Dryos serves is UTC.
Related streams
- CAISO system loadCAISO
CAISO-wide demand every five minutes — the Current demand line on caiso.com's Today's Outlook — flagged on the evenings CAISO is calling on demand response.
every 5 min · 5m rows1 entitycaiso-system-load - CAISO five-minute load forecastCAISO
The load forecast CAISO's real-time dispatch runs on, every five minutes, for its own areas and every Western EIM balancing authority.
every 5 min · 5m rows37 entitiescaiso-load-forecast-5min - CAISO hourly actual loadCAISO
Hourly integrated actual load for each CAISO area and every Western EIM balancing authority — what the forecasts are scored against.
hourly, ~1 h after the hour · 1h rows37 entitiescaiso-load-actual-hourly - CAISO day-ahead load forecastCAISO
CAISO's hourly day-ahead load forecast by area.
checked every 15 min · 1h rows36 entitiescaiso-load-forecast-dam - CAISO two-day load forecastCAISO
CAISO's hourly load forecast two days ahead, by area, kept as snapshots stamped when Dryos first saw each value.
checked every 15 min · 1h rows36 entitiescaiso-load-forecast-2day - CAISO seven-day load forecastCAISO
CAISO's hourly load forecast for the next seven days, by area, kept as snapshots stamped when Dryos first saw each value.
checked every 15 min, a week ahead · 1h rows36 entitiescaiso-load-forecast-7day