Yup! Rain should be tapering off by late morning. An interesting point is that the last 3 races have only used med and hard compounds. Using my very exacting 'fingers' I have detected a very slow wear process of the track surface since the inaugural race, when it felt much more like a highschool sprint track.
However, with about 7"+ having fallen there, the track will be very 'green' and potentially slick regardless of how damp it is at quali. Could be a few offs during quali which may affect the race!
Thankfully our parking lot is paved. They closed all of the grass/gravel lots and I am sure they won't be open tomorrow. They've set up complimentary shuttles for patrons in down town Austin. But the heavy rains are still going so none of the downtown festivities are happening. Sucks for all the local vendors, including the food trucks that come to serve the track!