What Weather API Responses Don’t Tell You About Data Provenance (And How to Reconstruct It)
When a weather API returns a number, do you know where it came from? METAR, NWP model, or blended? Here’s how to figure that out and why it matters.
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Chasing the Right Model Run: Why Your Forecast Data Is Older Than You Think
GFS, NAM, and HRRR don’t publish instantly after their run cutoff. Here’s how model run latency affects what your weather API actually returns.
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How to Build a Precipitation Probability Threshold Alert Without Getting Flooded by False Positives
chance_of_rain is one number, but building a useful rain alert from it isn’t trivial. Here’s how to filter false positives with duration, intensity, and timing logic.
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Why forecast_hour Skips Around: Understanding Model Run Timing and What It Means for Your API Requests
GFS and HRRR don’t update on the hour. Here’s how model run cycles affect which forecast data you’re actually getting back — and how to build around it.
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Cold Weather, Warm Cache: How to Set TTLs That Actually Match Forecast Update Cycles
Generic cache TTLs waste quota or serve stale forecasts. Here’s how to align expiry times with HRRR, GFS, and NAM model run schedules instead.
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Cold Start Problem: How to Handle Weather API Requests for Locations With No Nearby Stations
What actually happens when your weather API request lands in a data desert — and how to build around sparse station coverage without serving garbage to your users.
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How to Build a Wind Chill and Heat Index Switch: Knowing Which Feels-Like Formula to Apply
Wind chill and heat index are not interchangeable. Here’s how to build logic that picks the right feels-like formula from WeatherAPI data — and when both break down.
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Hourly Forecast Interpolation: Why Grabbing Hour 0 and Hour 1 Isn’t Enough for Sub-Hourly Apps
WeatherAPI returns hourly snapshots, not continuous curves. Here’s how to interpolate between them correctly — and where linear math quietly breaks.
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How to Use the History API for Ground-Truth Validation: Catching When Your Forecast Was Just Wrong
Learn how to use WeatherAPI’s history endpoint to validate forecast accuracy after the fact — with real field names, comparison logic, and honest caveats.
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How to Detect Thunderstorm Risk Before the Condition Code Changes: Using Pressure, Humidity, and Dewpoint Together
Condition codes flag thunderstorms too late for most apps. Here’s how to use pressure trend, dewpoint, and humidity together to catch risk early.