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Angivelse af skymængde ......................................................................... 181
3.6.2 Tåge, tågedis og tør-dis ................................................................ 182
3.6.3 Advektions- og fronttåge ............................................................. 184
3.6.4 Sigtbarhed ved tågedis, sne, røg, støv og sandfygning.................. 185
3.7 Luftmasser ......................................................................... 188
3.7.1 Ændring af en luftmasse .............................................................. 189
3.8 Fronter .............................................................................. 195
3.8.1 Vandrende lavtryk ....................................................................... 196
3.8.2 Frontskyer ................................................................................... 197
Varmfronten ........................................................................................... 199
Koldfronten ............................................................................................. 200
Okklusion ................................................................................................ 200
3.9 Farligt flyvevejr .................................................................. 202
3.9.1 Vejrfænomener og SIGMETS ........................................................ 203
3.9.2 Isdannelse ................................................................................... 205
Symboler på vejrkort .............................................................................. 209
3.9.3 Torden ......................................................................................... 210
3.9.4 Flyvning i bjergområder ............................................................... 215
3.10. Klimatologi ....................................................................... 217
3.11. Meteorologisk information ............................................... 218
3.11.1 Vejrinformation til forberedelse af flyvning ................................ 219
3.11.2 Forkortelser – vejrfænomener .................................................... 222
3.11.3 Forkortelser og symboler på Significant Weather Chart .............. 223
3.11.4 General Aviation Forecast .......................................................... 225
3.11.5 Observationer – aktuelt vejr ....................................................... 226
3.11.6 Koder METAR, TREND, TAF ......................................................... 227
Metar .................................................................................................... 228
Trend .................................................................................................... 231
TAF........................................................................................................ 232
VMC ...................................................................................................... 233
Vejroplysninger under flyvningen .......................................................... 234
Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2022
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