26-March-2023
Gorski Kotar Coastal Side, Novi Vinodolski, Primorsko-Goranska Županija, Rijeka, Hrvatska.
Note, compared to the previous photo, that there are at least 3 different superimposed currents, which justifies (wind shear) the phenomena of the previous hours and confirms that in the troposphere (an isobaric map explains this clearly) the motions are not neat-cut and linear from the ground to the boundary with the stratosphere, but WAVY and overlapping.
If the bora wind continues on the ground (from E/NE to W/SW) coming from behind me and from the left towards the right in the photo, not so the residual snow virgas (on the left) at an intermediate altitude, i.e. between 1500m/850hpas and 3000m/700hpas, which remain secluded on the left as they parade towards the South, where now there are no more clearings (in the background in the centre-left of the photo); the residual cloud arc at high altitude (over 5000m/500hpas), on the right and now center of the photo, moves in the opposite way to the bora, rising from the right (W/SW) to the left of the photo and towards me (E/NE) this also due to the residual thrust in all directions of the strong Tstorm (it is the residual cap of the anvil "fungus") on eastern Istria.
Basically on the ground the currents move according to the favors of the orography, from N/E towards S/W, at altitudes intermediate, above the reliefs, currents from NORTH towards SOUTH prevail, but all, due to the currents at high altitudes from N/W towards S/E, it translates, more or less quickly, towards the East (the left in the photo) this due to the impulse of the jet stream at 300hpas, which in the northern hemisphere is from west to east and which, after being slackened by LP vortex now resumes zonality.
Finally, the residual thrust in all directions of the cloudy arc at high altitudes also tends to open towards the North, therefore in opposition to the underlying currents.
Posted by stefano zerauschek on 2023-04-17 11:53:29
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