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Which of the following statements is an interpretation of the SIGMET ?

LSAS SIGMET 2 VALID 030700/031100 LSZH- SWITZERLAND FIR/UIR MOD TO SEV CAT FCST N OF ALPS BTN FL 260/380 STNR INTSF

  • A
    Moderate to severe clear air turbulence of constant intensity to be expected north of the Alps
  • B
    Severe turbulence observed below FL 260 north of the Alps. Pilots advised to cross this area above FL 380
  • C
    Zone of moderate to severe turbulence moving towards the area north of the Alps. Intensity increasing. Pilots advised to cross this area above FL 260
  • D
    Moderate to severe clear air turbulence to be expected north of the Alps. Intensity increasing. Danger zone between FL 260 and FL 380
Find below the decoded SIGMET:
LSAS SIGMET 2 VALID 030700/031100 LSZH- SWITZERLAND FIR/UIR MOD TO SEV CAT FCST N OF ALPS BTN FL 260/380 STNR INTSF
  • SIGMET sequence number 2 (2). This warning is valid from 0700 UTC until 1100 UTC on the 3rd (VALID 030700/031100) and covers the area of Switzerland Flight Information Region/Upper Information Region (SWITZERLAND FIR/UIR). Moderate to Severe Clear Air Turbulence (MOD TO SEV CAT) is forecasted (FCST) North of the Alps (N OF ALPS), between FL260 and FL380 (BTN FL 260/380). Stationary (STNR) and intensifying/Intensity Increasing (INTSF).

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