Meteorology 3

Question 1

Frontogenesis

Answer 1

Change in Magnitude and orientation of the temperature gradient due to directional and speed changes in the wind field

Question 2

Frontolysis

Answer 2

Dissipating or weakening of an atmospheric front

Question 3

GFA Issue times

Answer 3

• 0000z, 0600z, 1200z, 1800z
• Issued in sets of 3
• Issued approximately 30 minutes before beginning of coverage period

Question 4

IFR Ceilings and Vis

Answer 4

• Less than 1000 AGL OR less than 3 SM

Question 5

MVFR Ceilings and Vis

Answer 5

• between 1000-3000 AGL OR between 3-5 SM

Question 6

VFR Ceilings and Vis

Answer 6

• More than 3000 AGL AND more than 5 SM

Question 7

Convective Cloud and Showers

Answer 7

• ISOLD (0-25%)
• SCT (25-50%)
• NMRS (>50%)

Question 8

Non-Convective Cloud and Showers

Answer 8

• LCL (0-25%)
• PTCHY (25-50%)
• XTNSV (>50%)

Question 9

TAF Issue Times

Answer 9

• Issued approximately 30 minutes before beginning of coverage period
• 12 or 24 hours usually