HEAT DOME MONITORING- HOW TO ON WINDY

[texsun41]

Because it is always so hot here in Texas every summer and we have to hear the dreaded "HEAT DOME" term so much, I've Been trying to learn how to view and monitor a Heat Dome on a weather map and thought I could do this on Windy. However, can't seem to be able to see it or figure it out on Windy's Weather Map. It doesn't make sense. TV stations will impose show a Heat Dome Graphic on their Weather Map making it very easy to see. I was hoping on Windy I could not only be able to see one easily, but monitor it and track it. Heat Domes are defined as a High Pressure Ridge that just sits still over your area. However, on the days our local weather says we are in a heat dome, I cannot see that same info on WIndy. When I Tick to show the pressure regions, the pressure over our city that is supposed to be in a heat dome, does not correlate to the highest pressure areas. As a matter of fact, the areas that show a "H" pressure region over it, our area has a lower pressure than that and we have the hotter temps. Maybe someone can explain this better or maybe Windy can show this better as a new graphic.

[Jari Sochorová]

Hi @texsun41, you can easily find a heat dome on Windy.com.

As you correctly mention, it is associated with an area of high pressure or a pronounced ridge. This feature is usually most clearly visible in the mid- and upper troposphere. At around 500 hPa, for example, it typically appears as a ridge or high-pressure system with unusually high geopotential heights.

You can display a heat dome as follows:

1. Select a parameter that can also be displayed at higher levels of the atmosphere, such as temperature or wind.
2. Select a pressure level, for example 500 hPa. On desktop, you can change it using the slider next to the aircraft symbol. On mobile, use the slider in the menu below the parameter selection.
3. Change the isolines to geopotential height.

The isolines will show you approximately how many metres above sea level the selected pressure level is located.

A heat dome can be identified by an area of unusually high values, often marked by closed contours or a pronounced northward bulge in the isolines. This pattern is clearly visible over the southern United States today.

At the surface, a heat dome may not be apparent because the surface pressure pattern is influenced by local factors, including the daily heating cycle, terrain, local circulations such as sea breezes and mountain–valley winds, boundary-layer mixing and soil moisture. A shallow thermal low may also form at the surface, as is the case today.

When television stations show a heat dome, they typically display geopotential heights in the mid-troposphere, usually at around 500 hPa.

[idefix37]

@Jari-Sochorová
Your explanations are clear, but they would be even clearer if Windy added a new layer: a color-shaded map of 500 hPa geopotential heights—a layer I have long been requesting.
See this article of Meteo Swiss (in French but you can select it in German). To explain the heat waves and heat domes over Europe they use this type of map.
Of course geopotential heights are displayed as isolines, but the analysis is less straightforward than with a color-shaded map.

Compare it with your first screenshot.