Howells played the full 90 minutes in front of a crowd of over 2,000 and saw Billy Bodin open the scoring after 21 minutes, netting with a low shot from Jake Cassidy’s pass.
The Luton youngster’s corner was then smashed in by Bodin for his second of the game on 32 minutes, before another setpiece by Howells saw David Stephens’ header deflected in by visiting defender Xavier Viera on the way in.
Wales continued to dominate in the second-half and made it 4-0 after 59 minutes when Ryan Doble fired in at the far post after Bodin, Howells and Cassidy had played their part in the build-up.
The win keeps alive Welsh hopes of qualifying for the play-offs, but they still have to take six points from their last two group matches to have a chance of making progress.
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Wales are at home against Armenia in August and travel to leaders Czech Republic during September.
Coach Brian Flynn said: “A 4-0 home win in any European competition is excellent.
“We tried to use the full width of the pitch against opposition who worked hard to deny us space.
“We were three goals ahead at half-time, but I felt our tempo could have been better.
“The players put that right and now we prepare for our match against Armenia in August.”
Ten group winners plus the best four runners-up in the qualifying rounds go into the play-offs and from there seven teams join hosts Israel in the finals next year.
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