Zapfige prospects
Today we pretty cold night in the State of Austria. Or as we say Alpine countries: it is zapfig.
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| In Lienz wars today zapfig |
If you look at the situation tonight, we recognize both the VERA analysis ( 18z) and on the analysis of UBIMET (20z), where are the current cold poles.
outsourced to an extremely cold air in the forest and wine district, with the slightly north wind will continue south tapped. In Vienna it is currently at -7 (Hohe Warte) to -3 degrees (City) is still relatively "mild". Zwerndorf contrast to the Slovak border is now a night well logs the -20 degrees. Currently there are hats -19 ° with a dew point of -20 degrees.
But it's not only cold air ...
One reason for the upcoming icy night is in the area of high pressure VERNON founded, which has last night laid directly over the Alps.
In high pressure areas decrease the air masses from a wide area, as the cross-section of the atmosphere (along the 48th parallel as the The descending air causes Wolkenauflösug in the middle layers of the atmosphere, the first ingredient -. a clear night - is thus given
.
Today's satellite image (noon) of rain shows across Europe, but rather something that one holds on first sight of clouds. namely snow, the numerous Mediterranean lows, the Arctic air have a größfflächige snow cover in Europe caused a gigantic white body.:
- the warming soil heat flux in derogation
- strong and long-wave cooling down
- thus enhances the appearance of several hours in continuous night!
The cooling takes place tonight is exciting in itself, but also has far more serious consequences in the coming days. The cold air is heated during the day tomorrow while the sun light, an approaching warm front, however, provides primarily for heating in height and partly dense cirrus clouds and Alto (low LIANE is also on the satellite image over the see Atlantic). These two factors allow for a reinforced floor, but inversion.
The only one who can make the cold air tomorrow, an end is an old friend.
morning Hair Dryer: The reason for the cold temperatures in the east have been resolved. And in the West? Often a high pressure area is bound up with heavy fog, but the flow turns more in height to south.
The pressure gradient is increased in the night, thus ensuring an increased outflow (mainly in the Inn Valley), but also in the north-south oriented Föhnälern (Rhine Valley, Wipptal, ...). The air drops in the Alpine valleys and the snow is even colder. The dry air along with cooler dew still not included.
The hair dryer will therefore have to spend a lot tomorrow to force to break through to the valleys. The driving force of the hair dryer (pressure gradient of 10 hPa) but should be sufficient for some valleys. Normally. But the valley, cold air, combined with the SSC and the cirrus clouds (low radiation) is the favorite projects of the hairdryer (to break through that is) to stop. It will be interesting ...
Monday Freezing Rain? ... because the Sonntagsföhn and the temperatures reached are decisive for whether on Sunday evening in Vorarlberg and subsequently Sunday night and Monday morning in the upper country, and in the Außerfern Flachgau, Inn and Mühlviertel freezing rain is possible.
If the user happens from a cold air layer of snow and crossed on his journey to the ground a layer of air which is above the zero degree mark, shortly before the ground once again break into a cold air, freezing the raindrops on the ground obviously.
helps again a cross section of the individual layers of the atmosphere (the base map gives only be for the main pressure areas 300,500,700,850,925) to analyze. And as you can see it already:
is on Monday at 12 UTC is expected to push a warm layer of air at about 2000 m (800 hPa) and bring it formed snowflakes to melt.
complex? lies between, but some (mostly covered) night, but will be cold despite föhniger conditions. Thus we look to the Föhninseln banned tomorrow and wait for the hair dryer eroded away the cold air. Where he fails to do that on Monday most likely to freezing rain ...
Previous record cold - December Of the Kälterkrden for the month of December we are still far away. Only in the in the table (top ten) not listed places (eg, Eisenstadt with -17.8 degrees) may be convergence is possible.
# Update 9:30 CET: As expected #
, it was tonight zapfig cold, the record values have not yet reached. The coldest was in Wr. Neustadt with -21.9 degrees. In the previous December record on 12.01.1938 -23.2 degrees were measured, thus missing 1.3 degrees. But otherwise been teilwesie the -20 degree reached or exceeded.
1, Wiener Neustadt -21.9 degrees
second Klausen Leopoldsdorf -20.8
third Zwettl -20.4
4th Zwerndorf -20.0
5th Gars am Kamp -19.8
However, the UBIMET stations Kirchberg / Pielach (-16.0) and Hague (LA) (-16.9) the previous December-minima were cracked. The stations are still not too many years there.
END # # Update 09:30 CET Christmas donation donated Blog colleague Manfred, I think lobensweterer way, a weather station for a place in Austria. Sign-in procedures and the issue is here:
http://wetterinfos.blogspot.com/2010/12/jedes-jahr-eine-gute-tat-fur-die.html --------------------------- sources of this blog entry: webcam Lienz: Permedia.at [ 1] analysis maps: VERA analysis: IMGW [2]; MSM model (EC): UBIMET [3] Weather Maps: wetter3.de [5, 7; 9] / weather-central [4, 8] Satellite: Uni Bern / NOAA: http://saturn.unibe.ch/rsbern/noaa/dw/realtime/index.html [6] record cold December UBIMET / ZAMG