Why chunksize Matters in GRIB2 Ingestion: Lessons from Processing HRRR at Scale
Processing HRRR and GFS GRIB2 files efficiently isn’t just about parsing — chunk size and field selection decisions dominate real-world ingestion performance.
API
API
Why weather_code Changes Between Forecast Issuance and the Hour It Describes
WeatherAPI’s condition codes can flip between when a forecast is issued and when that hour arrives. Here’s why, and how to build around it.
API
Why Daily Aggregates Lie: How WeatherAPI Builds day.avgtemp_c and Why Your Business Logic Shouldn’t Trust It Blindly
WeatherAPI’s daily avgtemp_c, maxtemp_c, and mintemp_c aren’t raw observations — here’s exactly how they’re derived and where they silently go wrong.
API
Why wind_kph at 10m Doesn’t Match What Your Anemometer Reads: The Wind Height Problem in API Data
WeatherAPI returns wind speed at 10m reference height. Here’s why that causes real discrepancies and how to correct for it in your application.
Tutorial
How to Build a Rate-Limit-Aware Request Queue for WeatherAPI Without Burning Your Monthly Quota
Burning API quota on retries and duplicate calls is easy to avoid. Here’s how to build a request queue that respects rate limits and protects your monthly cap.
API
Why API Responses Give You Weather Code 1183 at 3am: Understanding Condition Code Assignment at Night
WeatherAPI condition codes behave differently at night than during the day — here’s why, how we map METAR data to codes, and what it means for your app logic.
API
Why Pressure Tendency Beats Absolute Pressure for Short-Term Forecast Logic
Absolute pressure tells you where you are. Pressure tendency tells you where you’re going. Here’s how to derive and use it from WeatherAPI hourly data.
Tutorial
How to Build a Renewable Energy Output Estimator Using WeatherAPI’s Solar and Wind Fields
Build a solar and wind energy output estimator using WeatherAPI’s hourly forecast fields. Real field names, formulas, and caveats for developers.
API
Modeling Run Windows and the Dead Zone: Why Your Forecast Can Be Two Model Cycles Out of Date
GFS, NAM, and HRRR don’t update continuously. Here’s how model run schedules create a ‘dead zone’ that makes your API forecast older than you think.
Tutorial
Why batch=true Is the Most Underused Feature in WeatherAPI for Multi-Location Apps
Building an app that polls weather for dozens of locations? Here’s why batching requests changes the architecture—and how to actually implement it.