At noon, the Sun is observed on the meridian, 30 degrees south of the zenith.?

On the meridian, azimuth = 180°

Altitude = (90 - 30)° = 60°

Altitude (theoretical) = 90 - Zenith distance.
Altitude = 90 - 30 = 60
Azimuth (modern) is measured from North (000) and increases going to the right (East = 090, South = 180, West = 270, North = 360... which is the same as 000) (ship navigators use 000, airplane pilots use 360).

Since the Sun, on the meridian, is due South (in your problem), then its azimuth must be 180.

60 degrees altitude. 180 degrees degrees azimuth. This is for LOCAL noon. NOT not standard or daylight time UNLESS you near the central meridian of a time zone,

"...Altitude is the angular distance of an object above the local horizon. It ranges from 0 degrees at the horizon to 90 degrees at the zenith, the spot directly overhead.
Azimuth is the angular distance of an object from the local North, measured along the horizon. An object which is due North has azimuth = 0 degrees; due East is azimuth = 90 degrees; due South is azimuth = 180 degrees; due West is azimuth = 270 degrees.
These two angles specify uniquely the direction of any object in the sky. Some telescopes have alt-az mounts which swivel in these two perpendicular axes; camera tripods and tank turrets are other examples of alt-az devices.

The altitude of an object is especially important from an practical point of view: any object which has an altitude less than zero is below the horizon, and hence inaccessible. Moreover, the altitude of an object is related to its airmass, a measure of how much air the light from that object must traverse to reach the observer. The larger the airmass, the more light is scattered or absorbed by the atmosphere, and hence the fainter an object will appear. We'll deal with airmass at greater length a bit later.

However, note that two observers at different locations on Earth will not agree on the (alt, az) position of an object. Moreover, as the Earth rotates, an object in the sky appears to move from East to West, so its (alt, az) position changes from moment to moment...."

http://spiff.rit.edu/classes/phys373/lectures/radec/radec.html

It is the autumnal or vernal equinox north of the tropic of Cancer.