Match ends, Barnet 1, Wycombe Wanderers 3.
League Two pacesetters Wycombe overcame Barnet, who finished the FA Cup first-round tie at The Hive with nine men.
John Akinde rounded keeper Matt Ingram to put the Conference leaders ahead.
Ingram made a series of saves before Paul Hayes levelled from the spot after Andy Yiadom fouled Matt McClure.
Sam Togwell was shown a red card for a tackle on Matt Bloomfield, and Aaron Pierre's header and a Sam Wood tap-in sealed victory for Wycombe before Yiadom was also sent off.
Yiadom, who escaped punishment after conceding the first-half penalty, was shown Barnet's second straight red card for his reckless late challenge on Josh Scowan.
Barnet manager Martin Allen told BBC London 94.9:
"With the wind and rain blowing down the pitch, we battled and we played with full energy, we kept going right to the very end.
"I think it's best we respect the referee's decisions, he has a very difficult job, with a very quick pitch and the weather, who am I to be judgmental.
"I certainly don't put any blame towards the referee, I shook his hand as he came up the tunnel.
"We've given them a real fright, that first 45 minutes that's how we play week in, week out."
Wycombe boss Gareth Ainsworth told BBC Three Counties Radio:
"It was difficult today, it was pouring with rain and the wind was so forceful down one end.
"I thought we were the better team by far in the second half and deservedly took the tie.
"To get the penalty was a blessing really, and the (first) sending off changed things.
"My message at half time was 'you've got the wind, you've got the numbers and I know Barnet are going to dig deep, but you're going to have to dig deeper'."
- 2YiadomBooked at 90mins
- 15Villa LopezSubstituted forMensahat 61'minutes
- 14TogwellBooked at 45mins
- 11CookSubstituted forGambinat 70'minutes
- 10MacDonaldSubstituted forHuntat 45'minutes
- 4ScowenBooked at 24mins
- 6PierreBooked at 63mins
- 10BloomfieldSubstituted forLewisat 80'minutes
- 19McClureSubstituted forEphraimat 83'minutes
- 9HayesSubstituted forCowan-Hallat 75'minutes
- Oliver Langford
- Shots on Target
Second Half ends, Barnet 1, Wycombe Wanderers 3.
Attempt missed. Joe Jacobson (Wycombe Wanderers) left footed shot from outside the box is high and wide to the left. Assisted by Hogan Ephraim.
Delay over. They are ready to continue.
Delay in match Josh Scowen (Wycombe Wanderers) because of an injury.
Andy Yiadom (Barnet) is shown the red card.
Foul by Andy Yiadom (Barnet).
Josh Scowen (Wycombe Wanderers) wins a free kick on the right wing.
Attempt saved. Paris Cowan-Hall (Wycombe Wanderers) right footed shot from the centre of the box is saved in the bottom right corner. Assisted by Sam Wood with a cross.
Substitution, Wycombe Wanderers. Hogan Ephraim replaces Matt McClure.
Attempt saved. Bernard Mensah (Barnet) right footed shot from the left side of the box is saved in the bottom left corner. Assisted by Curtis Weston.
Substitution, Wycombe Wanderers. Stuart Lewis replaces Matt Bloomfield.
Attempt blocked. Andy Yiadom (Barnet) right footed shot from outside the box is blocked.
Attempt missed. Max Kretzschmar (Wycombe Wanderers) header from the centre of the box misses to the right. Assisted by Josh Scowen with a cross.
Foul by Bernard Mensah (Barnet).
Max Kretzschmar (Wycombe Wanderers) wins a free kick in the defensive half.
Substitution, Wycombe Wanderers. Paris Cowan-Hall replaces Paul Hayes.
Goal! Barnet 1, Wycombe Wanderers 3. Sam Wood (Wycombe Wanderers) left footed shot from very close range to the centre of the goal. Assisted by Matt McClure with a cross.
Attempt saved. Bernard Mensah (Barnet) left footed shot from the centre of the box is saved in the centre of the goal. Assisted by John Akinde with a headed pass.
Andy Yiadom (Barnet) wins a free kick in the defensive half.