GridVigil computes a 0-100 Power Pressure Score per region from six weighted subscores, refreshed on a schedule directly from official public data sources. Every number traces back to a real source — nothing is simulated.
Power Pressure Score subscores
Demand growth (25%) — Short-term growth in hourly demand: the most recent 3-day average vs. the same 3-day window roughly a week earlier (non-overlapping, week-over-week), from EIA's Hourly Electric Grid Monitor (Form EIA-930).
Capacity margin (20%) — Projected planning reserve margin, from each grid operator's own official published figure where available (ERCOT, NYISO, MISO), NERC's Long-Term Reliability Assessment for PJM/CAISO/SPP/ISO-NE/Florida, or an EIA-860M + EIA-930 derated-capacity proxy for Southeast and Mountain West.
Large-load pipeline (20%) — Size of the data-center / large-load interconnection queue relative to current peak demand. Currently computed for ERCOT only, from ERCOT's monthly recap reports.
Generation additions/retirements (15%) — Net planned generation capacity minus retired capacity, relative to current operating capacity, from EIA-860M.
Transmission congestion (10%) — Average absolute congestion price component of locational marginal price. Currently computed for CAISO only, from CAISO OASIS.
Weather-driven demand stress (10%) — Active NWS extreme-weather alerts and forecast high-temperature deviation from a comfortable baseline, from the National Weather Service API.
Data sources
EIA API v2 (Form EIA-930) — Nationwide hourly demand, forecast demand, and generation by fuel type.