Live market data
SPP wind forecast
SPP's short-term wind forecast against actual output across the fourteen-state wind belt — the single number that moves this market most.
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SPP's short-term wind forecast against actual output across the fourteen-state wind belt — the single number that moves this market most.
How much wind power will SPP get?
SPP wind output peaks at 26,994 MW on Mon, 2 AM, against a low of 2,041 MW — a swing of 24,953 MW across the window. Wind forecast is the heaviest area at 26,994 MW.
Every line above, and who produced it.
The grid operator's own published forecast for these hours. Source: SPP.
Each day of the window on its own.
Every hour of the window, shaded by load.
| 0 | 6 | 12 | 18 | |||||||||||||||||||||
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| Thu, 8/27 |
| Series | Peak (MW) | Peak hour | Low (MW) | Average (MW) |
|---|---|---|---|---|
| Wind forecast | 26,994 | Mon, 2 AM | 2,041 | 16,316 |
| Wind settled (recent) | — | — | — | — |
| Forecast | Produced by | Method | Horizon |
|---|---|---|---|
| Wind forecast | SPP | SPP mid-term wind forecast and actual wind output | 7 days ahead, hourly |
SPP publishes a point forecast with no confidence interval. Error grows sharply with lead time across a footprint this long, and a frontal passage mistimed by two hours is the dominant failure mode.
SPP publishes its wind forecast twice: a five-minute short-term run that reaches about four hours, and an hourly mid-term run that reaches a full week. This page plots the mid-term one against what the fleet actually delivered, because the question a week-ahead reader is asking is not the question a dispatcher four hours out is asking.
SPP's footprint sits on the spine of the US wind belt, from the Dakotas to the Texas Panhandle. Wind is routinely the largest source on the system and has served over 60% of load at times — records no other US market approaches. When the wind forecast moves, everything downstream moves: commitment, congestion, prices at both hubs.
The scorecard below measures forecast against delivery over the settled window. In SPP a gigawatt of wind miss is not a rounding error — it is the difference between negative prices and triple-digit ones on the wrong evening.
curl "https://askthegrid.com/api/v1/grid/radar/curves?iso=SPP&horizon=extended"
Connect your agent to mcp.askthegrid.com and this forecast is a tool call away — the same host Claude and ChatGPT connectors already use.
More than any other US market: wind is routinely SPP's largest source, has exceeded 60% of load at times, and averages over a third of annual energy. The fourteen-state footprint sits directly on the US wind belt.
This is SPP's short-term operational forecast — roughly the next four hours at five-minute resolution. It is what dispatch actually keys off; SPP publishes longer-horizon forecasts separately, and this page does not pretend to show them.
Because wind sets the marginal price so often. An unforecast wind lull must be covered by gas and coal on short notice — prices jump; an unforecast surge floods the market — prices go negative. In SPP the wind forecast is, functionally, the price forecast.
Plotted window Aug 27, 3:00 AM CDT → Sep 4, 2:00 AM CDT. Reissued continuously; the latest vintage is shown.
| Fri, 8/28 |
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| Sat, 8/29 |
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| Sun, 8/30 |
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| Mon, 8/31 |
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| Tue, 9/1 |
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| Wed, 9/2 |
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| Thu, 9/3 |
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| Fri, 9/4 |
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Darkest cells are the tightest hours. The window peaks at 26,994 MW on Mon, 2 AM, local to the market.