Weather forecasters say the Festival of Motorcycling's practices look hopeful for the rest of the week.
It's after poor weather caused problems for race organisers earlier this week.
Roads around the Mountain Course are due to close at 6pm this evening, and reopen no later than 9pm - if the session goes ahead.
Weatherman Dave Hulse from Ronaldsway Met Office says he's hopeful action can get underway tonight:
Huge floating book fair to arrive in Douglas next month
Stay safe for Hop Tu Naa tonight
Special Olympics fundraiser needs you
Peel ready for bonfire and fireworks later
Government: "UK never told us about child murderer"
Farm shop's newest worker needs your name suggestions
Bus Vannin gives update on staffing problems and routes affected today
Toilets vandalised for fourth time in a month