Patiszerg

Hey all I've got a question and I couldn't find a definitive answer. This picture may appear on the FAA instrument written test and I think it means "light rain showers happening continuously over half or more of the shaded in grey area." Can anybody else me out and confirm that? Thanks a lot.

Hopefully the image upload site works... if not it's on page 66 of the Airman Knowledge Testing Supplement for Instrument Rating FAA booklet they release to the public. It show a grayed out area with single black dots surrounding the area and in the middle it shows two dots and (separated by a slash) a single dot over an upside down triangle.

https://easyupload.io/zupjck

a different image upload side if that other one doesn't work... https://ibb.co/mJZBSxT

Thanks for looking and I appreciate the help.

gomissedagain

FAA Advisory Circular 00-45H on page 120 says that’s light right and showery precipitation over more than half the area.

This is a must have circular:

https://www.faa.gov/documentlibrary/media/advisory_circular/ac_00-45h_chg_1.pdf

This is also another good one to have:

https://www.faa.gov/documentlibrary/media/advisory_circular/ac_00-6b.pdf

Patiszerg

Nice thanks. The double dots and the single dot over the triangle clearly means light continuous showers. I found that easily on the page you mentioned but I still can't find any new information about the area that is grayed/shaded that means "over more than half of the area".

In one of my old FAA "Aviation Weather services handbook" published in 2007 it states "Precipitations conditions are described further by the use of shading. Stable precipitation events are classified as continuous or intermittent. Continuous precipitation is a dominant and widespread event and, therefore, shaded. Intermittent precipitation is a periodic and patchy event and unshaded. Shading is also used to characterize the coverage of unstable precipitation events. Areas with more than half coverage are shaded, and half or less coverage are unshaded.

Any new information that I can find about weather chart shading deals with multiple freezing levels, wind greater than 70kts or T-storms probabilities... Nothing about "over more than half of the area". Lol studying for these knowledge test can be so annoying and I probably just going to be glad to pass it and get it over with.