# Foehn Simulator - Discussion

## Task List: Discussion with an aviation colleague

### 22:00 local time

### Warning

A colleague from the aviation team enters the office and asks: "I have observed quite high wind speeds at some stations. Have you issued a wind warning??"

a) Yes!
b) Not yet.

The correct answer(s) is/are: No right or wrong answer here.

### Warning Location

"Where did/would you issue the warning for?"

a) Vienna
b) Munich
c) Salzburg

The correct answer(s) is/are: c) Salzburg.

### Cause

"It's rather unusual that foehn winds get so strong overnight. What has triggered this event?"

a) The exceptional combination of southerly flow and a cold front that is approaching from the southwest (instead of the typical northwesterly direction). The cold air outflow from the mountains has caused an additional increase in foehn gusts.
b) The cold front from northwest and the southerly foehn are creating a confluence with brief strong gusts.
c) The rapid movement of the cold front causes local heavy convection over the mountains. Strong precipitation and downbursts increase the wind speeds.

The correct answer(s) is/are: a) The exceptional combination of southerly flow and a cold front that approaches from the southwest (instead of northwest). The cold air outflow from the mountains has caused an additional increase in foehn gusts.

### Aviation

"We got a notification from a pilot reporting bad visibility on his flight from Munich to Rome. Do you know what the reason is?"

a) Convective cells over the Apennines
b) Saharan dust
c) Unusually high moisture at upper levels

The correct answer(s) is/are: a) Convective cells over the Apennines and b) Saharan dust

### Next hours
"We should absolutely avoid missing another warning this night. There is an event going on in Salzburg tomorrow. We have to carefully watch the development of strong winds and heavy rain.
The front has passed but there might be other components of it that can enhance the wind gusts, such as temperature, surface pressure, confluence..."

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