# Change Log ## May 2026 — Heat index and wind chill response parameters - Added `HeatIndex` to the [Current Conditions](/developers/current-conditions/parameters) response — perceived outdoor temperature in hot conditions (≥80 °F), computed via the NWS Rothfusz 9-term equation. - Added `HeatIndex` and `WindChillTemperature` to the [Hourly Forecast](/developers/forecasts/parameters) response. --- ## April 2026 — Lightning forecast endpoint - Added lightning probability forecasts with a new endpoint in the [Lightning API](/developers/lightning/general). - Forecasts return 10-minute interval probabilities for a 2-hour window at any latitude/longitude. - Review the [Lightning Guide](/developers/lightning/guide) and [Lightning Parameters](/developers/lightning/parameters) for details. - Try the [Lightning Forecast recipe](/recipes/lightning-forecast) for a step-by-step walkthrough. --- ## March 2026 — AccuWeather Alerts now available in API - Developers can now access AccuWeather's proprietary alerts in a new API endpoint. - Review the [Alerts API Guide](/developers/alerts/guide) and [Alerts Parameters](/developers/alerts/parameters). --- ## January 2026 — Lightning API current and historical endpoints - Added current and historical lightning strike endpoints to the [Lightning API](/developers/lightning/guide). - Current endpoints return strikes by bounding box or point and radius. - Historical endpoint returns daily strike data by point and radius. --- ## August 2025 — Lightning API - Introduced the [Lightning API](/developers/lightning/general) providing real-time lightning strike data. - Powered by AccuWeather Lightning Network. --- ## November 2024 — Climbing index added - Added climbing index to the [Indices API](/developers/indices/general). --- ## August 2024 — Reports API - Introduced the [Reports API](/developers/reports/general) for weather summary reports including local storm reports. --- ## May 2024 — River Gauge API and new indices - Introduced the [River Gauge API](/developers/river-gauge/general) providing river water level data and flood stage information. - Added new indices to the Indices API: dry skin forecast, makeup and skincare forecast, clothes drying forecast, and car washing forecast. --- ## May 2023 — New indices - Added pest activity and brightness indices to the [Indices API](/developers/indices/general). --- ## June 2022 — Historical API endpoints - Added [Historical API](/developers/historical/general) endpoints for archived weather observation data. --- ## January 2022 — API removals - Removed Local Weather API and Historical Weather API. --- ## November 2021 — RealFeel® Phrase parameter - Added "Phrase" response parameter to all RealFeel® Forecasts and Current Conditions endpoints. - See [RealFeel® Phrase Reference](/developers/reference/realfeel-phrase) for the full list of phrases and temperature ranges. --- ## July 2021 — New forecast response parameters - Added `Evapotranspiration`, `SolarIrradiance`, `RealFeelTemperatureShade`, and `ThunderstormProbability` response parameters to hourly, daily, and quarter-day [Forecasts API](/developers/forecasts/general) endpoints. --- ## September 2020 — Historical weather endpoints - Added Historical Weather endpoints. --- ## June 2020 — Air Quality API version 2 - Launched [Air Quality API](/developers/air-quality/general) version 2 with expanded international coverage and pollutant details. --- ## November 2019 — Future Radar Maps - Added [Future Radar Maps](/developers/maps/future-radar-general) endpoints for forecast radar overlay tiles. --- ## June 2019 — Radar and Satellite Maps - Added [Radar Maps](/developers/maps/radar-general) and [Satellite Maps](/developers/maps/satellite-general) endpoints for weather map overlay tiles. --- ## December 2018 — Current Conditions and Locations updates - Added `HasPrecipitation` and `PrecipitationType` response parameters to the [Current Conditions API](/developers/current-conditions/general). - Added India postal codes to the [Locations API](/developers/locations/general). --- ## October 2018 — Tropical API updates - Updated [Tropical API](/developers/tropical/general) with new endpoints. - Added links to [status.accuweather.com](https://status.accuweather.com). --- ## July 2018 — Indices updates - Added flying travel index to the Indices API. - Updated index categories and levels for the flight delays index. --- ## February 2018 — AccuWeather Go - Added [AccuWeather Go](/developers/go/general) endpoints for route-based weather forecasts. --- ## November 2017 — Quarter-day forecasts - Added quarter-day forecast endpoints to the [Forecasts API](/developers/forecasts/general). --- ## July 2017 — Quick start guides - Added [Quick Start Guides](/developers/quick-start-guides) for easier developer implementation. --- ## April 2017 — Deep Links, Locations updates - Added [Deep Links API](/developers/deep-links/general) for direct links to AccuWeather content. - Added ParentCity object to Locations API response. - Added ability to filter Autocomplete Locations searches by country. - Added POI Search by Geoposition to Locations API. - Added Translation endpoints to the Locations API. --- ## January 2017 — Locations and Air Quality updates - Added DataSets parameter to the Locations API. - Added explanation of International Air Quality endpoints. --- ## December 2016 — Alerts and language updates - Added definitions for `lastAction` parameter in Alerts response. See [Alerts Action Reference](/developers/reference/alerts-action). - Added Kannada, Marathi, Punjabi, and Telegu to the list of available [languages](/developers/languages). --- ## October 2016 — Astronomy, Tidal Forecast, and Air Quality - Added [Astronomy API](/developers/astronomy/general) for sun and moon data. - Added [Tidal Forecast API](/developers/tidal-forecast/general) for tide predictions. - Updated International Air Quality to include Air Korea data access. --- ## July 2016 — Alerts update - Added "Update" as an Alert Last Action value. --- ## January 2016 — Indices and MinuteCast™ updates - Added metadata for indices 42-44. - Added new parameters to MinuteCast™ Premium responses. --- ## 2015 — Languages, parameters, and search updates - Added new language localizations including Gujarati, Tamil, Azerbaijani, and Uzbek. - Added `LocalSource` parameter for Current Conditions and Daily Forecast responses. - Added additional response parameters for Air Quality queries. - Added `toplevel` query parameter for Geoposition queries. - Added Time Zones menu item to Location API. - Added Partner ID information to Locations API. --- ## 2014 — MinuteCast™, forecasts, and language expansion - Added MinuteCast™ caching information to Best Practices and Forecasts pages. - Added WetBulb Temperature as a Current Conditions parameter. - Added HDD/CDD as Daily Forecast parameters. - Added Past 24 hour Historical Current Conditions. - Updated MinuteCast™ to include standard and premium options. - Added 6 new languages: Bengali, Bosnian, Icelandic, Montenegrin, Swahili, and Urdu. - Added a [Locations change log](/developers/locations/change-log). - Added SourceId and fully translated Summary to Alerts API output. - Updated Forecasts API to include 45 day forecasts and MinuteCast™. - Added "IsDaylight" to Hourly Forecasts. - Added 16:9(HD) aspect ratio for Current Conditions Photos. - Added Current Conditions Top Cities documentation. --- ## 2013 — Core API expansion - Added documentation for the [Tropical API](/developers/tropical/general), [Translations API](/developers/translations/general), and [Imagery API](/developers/imagery/general). - Updated CurrentConditions API to include getPhotos. - Added TopCityList and CityNeighbors to the Locations API. - Added EndDate and Category to Forecast API headlines output. - Added Category to the Alerts API output. - Severe weather alert description and last action are now translated. - Added basic code samples for locations and current conditions. - Added [Unit Types](/developers/unit-types) page and metric thresholds to Alarms homepage. - Added CategoryValue as a response parameter to the Daily Forecasts and Indices APIs. - Added hourly and daily forecast response parameters. - Added indices metadata page. - Added headline severity descriptions to the forecast parameters table. - Added documentation for the [Daily and Hourly Forecasts API](/developers/forecasts/general). --- ## 2012 — Initial API launch - Added documentation for the [Locations API](/developers/locations/general), [Current Conditions API](/developers/current-conditions/general), [Alerts API](/developers/alerts/general), [Daily Indices API](/developers/indices/general), [Weather Alarms API](/developers/weather-alarms/general), [Climo API](/developers/climo/general), and Legacy API. - Added [Weather Icons](/developers/weather-icons) page. - 12 new languages supported: Bulgarian, Croatian, Estonian, Filipino, Kazakh, Latvian, Lithuanian, Macedonian, Malaysian, Serbian, Thai, Vietnamese. - Changed date format for all APIs from `yyyy-mm-ddThh:mm:ss+/-hhmm` to `yyyy-mm-ddThh:mm:ss+/-hh:mm`.