Back to main menu    /    d1+09Z    d1+12Z    d1+15Z     /    d2+09Z    d2+12Z    d2+15Z    /    Help and usage    /   Use the clickable blipmaps below to get the name (mouse over) or the profile (click on) of a location (black small star).
sound09alpsj201.png sound09alpsj202.png sound09alpsj203.png sound09alpsj204.png sound09alpsj205.png sound09alpsj206.png sound09alpsj207.png sound09alpsj208.png sound09alpsj209.png sound09alpsj210.png sound09alpsj211.png sound09alpsj212.png sound09alpsj213.png sound09alpsj214.png sound09alpsj215.png sound09alpsj216.png sound09alpsj217.png sound09alpsj218.png sound09alpsj219.png sound09alpsj220.png sound09alpsj221.png sound09alpsj222.png sound09alpsj223.png sound09alpsj224.png sound09alpsj225.png sound09alpsj226.png sound09alpsj227.png sound09alpsj228.png sound09alpsj229.png sound09alpsj230.png sound09alpsj231.png sound09alpsj232.png sound09alpsj233.png sound09alpsj234.png sound09alpsj235.png sound09alpsj236.png sound09alpsj237.png sound09alpsj238.png sound09alpsj239.png sound09alpsj240.png sound09alpsj241.png sound09alpsj242.png sound09alpsj243.png sound09alpsj244.png sound09alpsj245.png sound09alpsj246.png sound09alpsj247.png sound09alpsj248.png sound09alpsj249.png sound09alpsj250.png sound09alpsj251.png sound09alpsj252.png sound09alpsj253.png sound09alpsj254.png sound09alpsj255.png sound09alpsj256.png sound09alpsj257.png sound09alpsj258.png sound09alpsj259.png sound09alpsj260.png sound09alpsj261.png sound09alpsj262.png sound09alpsj263.png sound09alpsj264.png sound09alpsj265.png sound09alpsj266.png sound09alpsj267.png sound09alpsj268.png sound09alpsj269.png sound09alpsj270.png sound09alpsj271.png sound09alpsj272.png sound09alpsj273.png sound09alpsj274.png sound09alpsj275.png sound09alpsj276.png sound09alpsj277.png sound09alpsj278.png sound09alpsj279.png sound09alpsj280.png sound09alpsj281.png sound09alpsj282.png sound09alpsj283.png sound09alpsj284.png sound09alpsj285.png sound09alpsj286.png sound09alpsj287.png sound09alpsj288.png sound09alpsj289.png sound09alpsj290.png sound09alpsj291.png sound09alpsj292.png sound09alpsj293.png sound09alpsj294.png sound09alpsj295.png sound09alpsj296.png
Surface parameters: mslp / sfc temperature / sfc dew point / sunshine   /  Wind parameters  /  thermal parameters  /  clouds parameters
Quick help: The mean sea level pressure (mslp) is the atmospheric pressure at sea level (the pressure reduced to sea level). It is an important parameter for paraglider and hangglider pilots flying in the Alps. A strong (more than 3-5 hPa) transalpine (between the north and the south sides of the Alps) mslp difference can result in unsafe and turbulent flying conditions associated with foehn phenomena, especially if there is strong winds aloft. If mslp is higher on the north alpine side it is often humid and cold on this side while it is dry and relatively warm on the south side (Italy) with turbulent and strong north wind. It is exactly the opposite with high pressure on the south side. With this chart you can immediately see red-orange colour areas (high pressure) on one alpine side and blue-green colour areas (low pressure) on the other one. If you see the same colour e.g. yellow on each side of the Alps, you can conclude a weak pressure difference between these both sides and thus safe flying conditions.
Aide rapide: La pression atmosphrique rduite au niveau de la mer peut tre un facteur important pour le vol libre. Une diffrence de plus de 3-5 hPa peut conduire des conditions de vol malsaine et turbulente surtout si des vents forts en altitude sont associs (phnomnes de foehn). Si la pression est plus forte au nord des Alpes, l'atmosphre est souvent humide et frache au nord et sche, chaude et agite (turbulence et vents forts) au sud. C'est exactement le contraire lorsque la pression est plus forte au sud. Avec cette carte on peut voir immdiatement 9, 12 et 15Z, la diffrence transalpine de pression ces 3 moments. Une plage rouge-orange correspond une zone de forte pression, une plage verte-bleue une zone de faible pression. Si les plages de couleur sont identiques ou proches de part et d'autres des Alpes (par exemple jaune), la diffrence transalpine de pression est faible.