Obergurgl, Austria

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6 Day Weather Forecast for 2440 m altitude, issued (local time): 00 am 19 Jul 2008

	Days 0-3 Obergurgl Weather Summary: Moderate rain (total 11.0mm), heaviest on Sun night . Freeze-thaw conditions (max 14°C on Sat morning, min -1°C on Fri night). Wind will be generally light.									Days 4-6 Obergurgl Weather Summary: Mostly dry. Freeze-thaw conditions (max 14°C on Thu morning, min -1°C on Mon night). Wind will be generally light.
	Fri 18 night	Sat 19 morn- ing	Sat 19 after- noon	Sat 19 night	Sun 20 morn- ing	Sun 20 after- noon	Sun 20 night	Mon 21 morn- ing	Mon 21 after- noon	Mon 21 night	Tue 22 morn- ing	Tue 22 after- noon	Tue 22 night	Wed 23 morn- ing	Wed 23 after- noon	Wed 23 night	Thu 24 morn- ing	Thu 24 after- noon
Wind (km/h)
Summary	clear	clear	light rain	cloudy	rain shwrs	rain shwrs	rain shwrs	clear	some clouds	snow shwrs	snow shwrs	some clouds	clear	clear	clear	clear	clear	clear
Snow cm	-	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-	-	-
Rain mm	-	-	1	-	2	4	4	-	-	-	-	-	-	-	-	-	-	-
Max °C	5	14	11	8	12	9	4	4	4	-1	5	5	4	10	11	8	14	14
Min °C	-1	10	8	6	10	6	0	1	0	-1	1	2	2	8	8	3	12	10
WChill °C	-5	9	6	3	8	4	-5	-3	-4	-6	-4	-2	-2	6	7	3	11	9
Freezing level (m)	3200	3500	3900	3800	3750	3800	3100	2700	2800	2400	2750	2950	3350	3750	4050	4250	4000	4250
Sunrise	-	4:39	-	-	4:41	-	-	4:43	-	-	4:43	-	-	4:45	-	-	4:46	-
Sunset	-	-	20:01	-	-	20:00	-	-	20:00	-	-	19:59	-	-	19:58	-	-	19:57

The above table gives the weather forecast for Obergurgl at the specific elevation of 2440 m. Our sophisticated weather models allow us to provide snow forecasts for the top, middle and bottom stations of Obergurgl. To access the weather forecasts for the other elevations, use the tab navigation above the table. For a wider view of the weather, check out the Weather Map" of Austria.

NOTE ABOUT FREEZING LEVELS AND TEMPERATURES
The freezing level that we forecast Obergurgl is the  free air freezing level. (More specifically, it is the uppermost free air freezing level). This means that all of the air above this elevation is below freezing however it does not necessarily imply that all of the air below it is above freezing.  We provide this because it best describes the level where falling snow first starts to turn to rain. On average, snowflakes only stay frozen for about 100 metres (300 feet) below the free air freezing level. That's because air temperatures usually increase steadily as you descend - but not always.  For example, a temperature inversion describes a pool of cold air near the ground with a layer of warmer air above it. This is a common occurrence in winter when the wind is light. Such pools of dense cold air can vary from a few metres to several kilometres deep and can persist from hours to several weeks. In an inversion, it can be simultaneously below freezing in a mountain valley, and also at a nearby summit, yet above freezing at some elevation in between. Most visitors to the Alps are very familiar with this. Such conditions can allow snow to fall much more than the usual 100 metres below the top freezing level, even reaching the valley, just as long as snow did not pass through enough warm air to melt. Otherwise, freezing rain or re-frozen soft hail (there is even a German word for it - graupel) reaches the valley instead. Our forecasts allow for these possibilities which is why you may see forecasts of snowfall and frost at elevations far below the free-air freezing level, or valley temperatures that are lower than summit temperatures. You may even see forecasts of rain to fall even though it is just below freezing at the surface - that happens if our model predicts that there is a deep warm layer just above. None of these are as contradictory as they may seem at first.

All of our temperature forecasts for Obergurgl are for the ground, not the air. These can be very different to free-air temperatures, especially at night. This can lead to what looks like a contradiction. Because the ground is such a good radiator of heat (especially on clear nights when there is a snow cover and the wind is light) surface temperatures often fall more than far below the free air temperatures - sometimes by more than 10 degrees. On such occasions, the snowpack freezes at elevations that are far below the free air freezing level. For example, in the European Alps, snow tends to freeze in valleys on still clear and still nights  even if the free air freezing level is above 3000m simply because snow is so efficient radiating its heat away. In reality there are two freezing levels; one just above the snow surface and another at 3000m with a layer of warmer temperatures in between where the snow may not freeze at all. In summary, the reason we provide surface temperatures is because these determine the condition of the snowpack.

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