{"uid":"cap_2dFVuX5CvYlXniaBfsmos","slug":"nws-active-severe-weather-alerts-feed-c335845d","name":"NWS Active Severe Weather Alerts Feed","description":"Active NWS severe/extreme weather alerts (tornado, hurricane, flood, winter storm…) with area, urgency, certainty, effective/expiry times, and a 1-10 severity score.","url":"https://oracles-production.up.railway.app/v1/weather-alerts/changes","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"limit":{"type":"integer","maximum":500,"minimum":1},"since":{"type":"string","format":"date-time","description":"Only changes detected after this ISO-8601 instant"},"min_significance":{"type":"integer","maximum":10,"minimum":1,"description":"Keep only changes scored at least this"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"count":{"type":"integer"},"source":{"type":"string"},"changes":{"type":"array","items":{"type":"object","properties":{"type":{"type":"string"},"title":{"type":"string"},"detail":{"type":"object"},"summary":{"type":"string"},"entityId":{"type":"string"},"sourceUrl":{"type":["string","null"],"description":"Primary-source link for verification"},"detectedAt":{"type":"string","format":"date-time"},"significance":{"type":"integer","maximum":10,"minimum":1},"effectiveDate":{"type":["string","null"]}}}}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_z3c3xG-jGQswymITG3KuT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns active NWS severe/extreme weather alert changes (tornado, hurricane, flood, winter storm, etc.) with area, urgency, certainty, effective/expiry times, and a 1-10 severity score","exampleAgentPrompt":"Pull all new NWS severe weather alerts since 2025-06-01T00:00:00Z with a significance score of at least 7 — I want to see tornado, hurricane, and major flood warnings, up to 50 results.","exampleUseCases":[{"title":"Emergency dispatch alert routing","prompt":"Check for any tornado or hurricane warnings active right now in the Southeast region — I need to know the urgency level and affected areas so we can dispatch emergency responders to the highest-risk zones first."},{"title":"Weather event monitoring for operations","prompt":"Show me all new severe weather alerts detected in the last 2 hours with a severity score above 6 — I'm running a logistics operation and need to know if winter storms or floods might disrupt our routes."},{"title":"Real-time public safety notifications","prompt":"Pull the most recent extreme weather alerts across the country with certainty and urgency details — we're broadcasting emergency warnings and need to prioritize the highest-impact tornado and flood warnings."}],"resultDescription":"A JSON object containing a count of matching alerts, the data source identifier, and an array of alert change objects. Each change includes the alert type (e.g. TornadoWarning), a title, a detail object with area/urgency/certainty info, a plain-language summary, a unique entityId, a link to the primary NWS source for verification, the ISO-8601 timestamp when the change was detected, an integer severity score from 1-10, and the effective date of the alert.","failureModes":["Invalid date-time format for 'since' parameter returns a 400 validation error","min_significance outside 1-10 range returns a 400 error","limit outside 1-500 range returns a 400 error","No active alerts matching filters returns an empty changes array with count 0","Payment not provided or insufficient returns a 402 Payment Required response","NWS upstream feed unavailable may return a 503 or stale data","Network timeout on Railway infrastructure returns a 504"],"whenToPreferThis":"Use this endpoint when you need structured, scored, real-time NWS severe weather alert data with urgency/certainty metadata and change-tracking since a specific timestamp. Prefer it over general weather APIs when you need emergency-grade alert signals (tornado, hurricane, flood, winter storm) with a severity score for triage, or when building monitoring systems that poll for new high-severity alerts at regular intervals.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T04:06:50.950Z","isFirstParty":false}