Ulster scored two tries as they beat Glasgow 12-0 in Saturday night's Magners League game at Ravenhill.
Darren Cave raced in under the posts for a try after three minutes and Ian Humphreys added the simple conversion.
Andrew Trimble fended off a couple of Glasgow players to run in the second try on 29 minutes, making it 12-0.
Wet and windy conditions made handling and flowing rugby difficult after the break and Humphreys skewed a long-range penalty attempt right of the posts.
Humphreys passed to Simon Danielli who breached the Glasgow defence and fed the ball for Cave to touch down and make it 5-0 in the opening minutes, Humphreys converting.
Dan Parks kicked a 14th-minute penalty attempt to the left of the posts but 15 minutes later a fine move by the Ulster backs saw Trimble outpace his pursuers and run over the line.
Humphreys was off-target with the conversion and Parks missed with another penalty effort a minute before the break.
The Ulster fly-half's long-range kick drifted right of the posts after the break and midway through the second half prop Justin Fitzpatrick was sin-binned.
Glasgow exerted some pressure late in the game but the terrible weather conditions ended the match as a spectacle.
The win takes Ulster up to fifth in the table with Glasgow now eighth.
Ulster coach Matt Williams:
"We wanted to play running rugby but unfortunately the weather dictated.
"Having said that, it was nice to score two good tries so early in the game and I thought we took them well, particularly the first one.
"We were disciplined and did not give away too many penalties and overall I thought we handled the conditions better than they did.
"Matt McCullough is a great wet-weather forward and the young lads did well, especially Ian Whitten. They are developing well."
Ulster: Clinton Schifcofske, Andrew Trimble, Darren Cave, Ian Whitten, Simon Danielli, Ian Humphreys, Isaac Boss, Justin Fitzpatrick, Rory Best (Capt), Brendon Botha, Ryan Caldwell, Ed O'Donoghue, Matt McCullough, David Pollock, Chris Henry. Replacements: Nigel Brady, Tom Court, Carlo Del Fava, Kieron Dawson, Cillian Willis, Niall O'Connor, Mark McCrea
Glasgow: Bernardo Stortoni, Hefin O'Hare, Jose Maria Nunez Piossek, Ruaridh Jackson, Chris Kinloch, Dan Parks (capt), Mark McMillan, Kevin Tkachuk, Fergus Thomson, Moray Low, Dan Turner, Opeta Palepoi, Calum Forrester, Kelly Brown, Johnnie Beattie. Replacements: Eric Milligan, Ed Kalman, Tim Barker, Stevie Swindall, Richie Gray, Peter Jericevich, Peter Horne
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.