[[Skew-T Log-P Diagrams]] can be accessed from a variety of sources online. They can be produced from actual observations, or forecast model data. ## Observations Actual observations are made using a **radiosonde**, twice daily, at select locations around the world. [[Storm Prediction Center - Sounding Analysis Archive](https://www.spc.noaa.gov/exper/soundings/)]() ![[SPC NOAA SkewT.png]] [[Upper-Air page: RAL Real-Time Weather](https://weather.rap.ucar.edu/upper/)]() ![[rap ucar.jpeg]] [[Atmospheric Soundings](https://weather.uwyo.edu/upperair/sounding.html)]() ![[uwyo SkewT.gif]] ## Forecast Models Data from various forecast models can be presented as Skew-T Log-P diagrams, for select locations. [[Forecast Soundings: Area, Models, and Stations](https://mag.ncep.noaa.gov/sounding-model-area.php)]() ![[mag ncep noaa.gif]] [[Model Sounding](https://www.weather.gov/zse/ModelSounding)]() ![[NWS Model Sounding.jpeg]] (discontinued by NOAA) Formerly: [[https://rucsoundings.noaa.gov/](https://rucsoundings.noaa.gov/)]() ![[ruc noaa.png]] ### Point Skew-T Log-P Some weather information sources can generate a "point" Skew-T Log-P diagram for any location the user selects, based on forecast model data. [[Forecast Models | Tropical Tidbits](https://www.tropicaltidbits.com/analysis/models/)]() ![[tropical tidbits.png]] [[BLIPMAP UniViewer](http://www.drjack.info/blip/univiewer.html)]() ![[BLIPMAP UniViewer point SkewT.png]] SkySight