WEATHER · JET STREAM (300 HPA)
Jet Stream (300 hPa)
The jet stream one level lower than the 250 hPa view - the ribbon of upper-air wind at 300 hPa (~30,000 ft), where the jet core often sits at lower latitudes and in winter. Painted worldwide as a flowing ribbon over a faint speed tint, and it also reads at any point on the map (tap or hover), following the forecast timeline. Read alongside the 250 hPa jet to see how deep and how tilted the jet is.
What it shows
This is the jet stream one pressure level lower than the flagship 250 hPa view - at 300 hPa, roughly 30,000 ft. The jet core is not a single flat sheet: it tilts and drops with latitude and season, sitting closer to 300 hPa at lower latitudes and through winter. Reading 250 hPa and 300 hPa together tells you how deep and how tilted the jet is, the way a forecast desk cross-checks two levels rather than trusting one.
How to read it
Like the 250 hPa ribbon, you see it two ways at once: a flowing ribbon of 300 hPa motion painted worldwide over a faint speed tint, and a real point value when you tap the map or hover (the 300 hPa wind speed and flow direction at that spot, following the timeline). Because the ribbon animates, the map runs flat (2-D) while it is on. The trick is to compare the levels: where the 250 and 300 hPa cores overlap, the jet is deep and powerful; where they pull apart, the jet is tilting with height and the strongest wind sits at one level or the other. The ribbon and tint are rendered from NOAA GFS 300 hPa wind with WeatherLayers; the point value comes from Open-Meteo (DWD ICON).
SEE IT LIVE
Open the full weather console with jet stream (300 hpa) on, then stack other overlays and scrub the forecast.