What's New

Date	Change	Tags
2026-06-17	SV Tropical Plotter page upgraded with many new features: https://www.stormvistawxmodels.com/sv/tropical/plotter
2026-06-16	StormVista On-Demand Composites now include option to show all members of ensembles ("stamps") in output. See the new options under Plot Type. https://www.stormvistawxmodels.com/sv/ondemand/mapping
2026-06-10	StormVista now offers hourly forecasts based on the AI models: AIFS, GraphCast, WeatherNext2, and FourCastNetV2. https://www.stormvistawxmodels.com/sv/hourly-forecasts These are now available in the SV API. https://www.stormvistawxmodels.com/api#/paths/model-data-aimodel---date---cycle-z-city-extraction-all-stations-hourly_-region-.csv/get Note that only the AIFS and AIFS ensemble have dew point and cloud cover, so they have been added to other products on StormVista like heat index and cloud cover.
2026-06-04	Updated/improved shear and shear composite forecast and anomaly maps are now available on StormVista: https://www.stormvistawxmodels.com/sv/composite/42-850-250-mb-wind-shear/tropatl/00z/6-10 https://www.stormvistawxmodels.com/sv/composite/43-850-250-mb-wind-shear-anomaly/tropatl/00z/6-10
2026-05-22	Real-Time API files (updating as model updates) are now available for subseasonal models, including the Euro weeklies. Some examples are listed here: Real-time Daily Max/Min - Raw: https://www.stormvistawxmodels.com/api#/paths/model-data-longmodel---date---cycle-z-city-extraction-realtime-max-min\_-region-.csv/get Real-time Daily Max/Min - GC: https://www.stormvistawxmodels.com/api#/paths/model-data-longmodel---date---cycle-z-city-extraction-realtime-corrected-max-min\_-region-.csv/get National WDDs - GC (RT): https://www.stormvistawxmodels.com/api#/paths/model-data-wkmodel---date---cycle-z-wdd-realtime-national.csv/get International WDDs - Raw (RT): https://www.stormvistawxmodels.com/api#/paths/model-data-wkmodel---date---cycle-z-wdd-realtime--area--raw.csv/get National Ens Mem WDDs - Raw (RT): https://www.stormvistawxmodels.com/api#/paths/model-data-wkmodel---date---cycle-z-wdd-realtime--type-\_members-raw.csv/get
2026-05-19	AI models added to StormVista chaos pages and API: https://www.stormvistawxmodels.com/sv/ensemble-chaos/aifs-ens/na/hgt500/2026051900z
2026-04-14	Starting after 12z cycle on Friday April 17, the weights used for Europe and Asia will be updated with more stations and updated population information. The reference information will be available on the SV API by late morning on Friday. https://www.stormvistawxmodels.com/api (WDD International)
2026-04-10	Netherlands and European total (Germany, France, Italy, Spain, UK, and Netherlands) have been added to all SV solar/combined pages and API. https://www.stormvistawxmodels.com/sv/solargen/2026041000z/europe https://www.stormvistawxmodels.com/api#/paths/model-data-model---date---cycle-z-renewables--region--solargen-forecast.csv/get
2026-03-26	Canadian Ensemble added to beta-testing Power Load forecasts on StormVista: https://www.stormvistawxmodels.com/sv/power-load
2026-03-20	On-demand analogs now allow you to choose other analog variables besides 500mb, including 2-meter temperature and precipitation. https://www.stormvistawxmodels.com/sv/ondemand/analogs
2026-03-19	NOAA's NBM model is now available in the StormVista API. Due to varying hours and formats/variables, it has its own section in the API documentation. https://www.stormvistawxmodels.com/api Variables/Units: File Description Units tmp2m 2m Temperature °F dpt2m 2m Dewpoint °F relh Relative Humidity % heatindex Heat Index °F windchill Windchill °F wetbulbglobe Wet Bulb Globe Temperature °F windspeed10 10m Wind Speed m/s winddirection10 10m Wind Direction degrees windgust10 10m Wind Gust m/s windspeed80 80m Wind Speed m/s winddirection80 80m Wind Direction degrees visibility Visibility miles cloudtotal Total Cloud Cover % (0% = clear, 100% = cloudy) solar Downward Shortwave Solar Flux W/m² prain Probability of Rain % psnow Probability of Snow % pfrzr Probability of Freezing Rain % picep Probability of Ice Pellets % precip Total Liquid Equivalent Precipitation (accumulated to forecast hour) inches snow Total Snowfall (accumulated to forecast hour) inches
2026-03-17	Poly-Panels on StormVista can now support 16 images (4x4) up from 9 (3x3). https://www.stormvistawxmodels.com/sv/4panels
2026-03-16	New feature with on-demand clustering enables you to progress clusters into future periods. https://www.stormvistawxmodels.com/sv/ondemand/clustering You will see the new option to "Select Other Display Period"
2026-03-11	Canadian ensemble hourlies have been added to StormVista. https://www.stormvistawxmodels.com/sv/hourly-forecasts/KORD/2026031100z/none/imperial https://www.stormvistawxmodels.com/api#/paths/model-data-model---date---cycle-z-city-extraction-all-stations-hourly_-region-.csv/get
2026-03-10	On-demand clustering now allows you to cluster multiple days using your custom blend of models (instead of one set period or hour). https://www.stormvistawxmodels.com/sv/ondemand/clustering - Choose the Daily Composite option when submitting your request. This will allow you to create your own mega clusters, but note that larger volume of model inputs will take longer to produce.
2026-03-02	NOAA CFS subseasonal forecasts out 30 days are added to SV for city and degree day forecasts. These are updated each day on the 0z cycle, like the other subseasonal models (but only 4 members). See degree day changes here: https://www.stormvistawxmodels.com/sv/weekly-dd-changes/cfs-weekly/gw_hdd/2026030200z See city extraction here (both grid-corrected and raw available): https://www.stormvistawxmodels.com/api#/paths/model-data-longmodel---date---cycle-z-city-extraction-corrected-max-min_-region-.csv/get See degree days in API here: https://www.stormvistawxmodels.com/api#/paths/model-data-wkmodel---date---cycle-z-wdd-national.csv/get
2026-02-25	New subseasonal daily analog composites are available for the CFS and European weeklies: https://www.stormvistawxmodels.com/sv/weekly-analogs-daily Subseasonal analog-based forecast line charts for weighted degree days are also now available here: https://www.stormvistawxmodels.com/sv/wdd-weekly-analog-daily
2026-02-23	Subseasonal GEFS weeklies city high/low and weighted degree days added to StormVista throughout SV API feeds (City-Extraction- Long and WDD-Long) Can track DD changes here: https://www.stormvistawxmodels.com/sv/weekly-dd-changes/gfs-ens-weekly/gw_hdd/2026022200z
2026-02-03	Weighted degree day histograms on SV now have a custom/on-demand option: https://www.stormvistawxmodels.com/sv/wdd-histograms/ Choose the Custom button instead of the NWP or AI models.
2026-01-29	For the regional population-weighted HDDs for Russia, we need to remove Omsk, UNOO and are recalibrating the other station weights in response. These changes will take effect over the weekend. New normal and history will be available via the api this weekend too. Sorry for any inconvenience this may cause.

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