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NOAA SPC Severe Weather Outlook by Coordinate
x402
NOAA SPC Severe Weather Outlook by Coordinate is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Returns NOAA Storm Prediction Center severe weather risk categories for days 1–3 and day 1 tornado, damaging wind, and large hail probabilities for a given US lat/lon.
Price / call$0.01
Success—
StatusUnknown
How this service works
NOAA SPC severe weather outlook at a coordinate - risk category for days 1 to 3 and day 1 tornado, damaging wind and large hail probabilities
Output
Returns an array of outlook entries for days 1–3, each with the SPC risk name (e.g. SLGT, ENH, MDT, HIGH), category code, validity window, issue time, and forecaster. Also includes a boolean any_severe_risk flag, highest risk in the 3-day window with its day, and day 1 specific probabilities for tornado, damaging wind, and large hail. A note field provides context for interpreting the result and a source field identifies the data origin.
Example use cases
Outdoor event safety check
“We're hosting an outdoor concert in Tulsa, Oklahoma — roughly 36.15 latitude, -95.99 longitude — this weekend. Can you pull the SPC severe weather outlook for the next 3 days and tell me if there's any significant tornado or hail risk on day 1?”
Agricultural field operations planning
“I need to decide whether to start harvesting wheat at my field near Amarillo, Texas — about 35.22 latitude, -101.83 longitude. Can you check the SPC convective outlook for the next 3 days and flag if there's any moderate or higher severe weather risk?”
Construction site weather risk monitoring
“My crew is working a job site outside Oklahoma City at 35.47 latitude, -97.52 longitude all week. Can you check the NOAA SPC severe weather outlook for days 1 through 3 and let me know if damaging winds or large hail are in the forecast for day 1?”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/weather/severe-outlook?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, per-day NOAA SPC severe weather risk categories and day 1 hazard probabilities (tornado, wind, hail) for a specific US coordinate. Prefer this over general weather APIs when the use case specifically requires SPC convective outlook data (TSTM/MRGL/SLGT/ENH/MDT/HIGH classifications) rather than temperature or precipitation forecasts.
Side effects
- Missing or invalid lat/lon query parameters — returns validation error
- Coordinates outside the contiguous United States — may return NONE risk or an error
- NOAA SPC data temporarily unavailable — upstream fetch failure
- Coordinates on the boundary of outlook polygons may produce ambiguous results
- Outlook not yet issued for a future day — may return null for day 2 or day 3 entries
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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