Qualifying for the United States Grand Prix under threat after the second session of practice is cancelled due to heavy rain and thunderstorms at the Circuit of the Americas

  • Nico Rosberg is 73 points behind Lewis Hamilton in the driver's standings 
  • But he set the fastest time in practice at the Circuit of the Americas
  • Heavy rain and thunderstorms are expected to wreak havoc this weekend 

Second practice for the United States Grand Prix has been cancelled after bad weather wreaked havoc in Austin on Friday.

A torrential downpour over the Circuit of the Americas, coupled with thunder and lightning, saw the session delayed before it was eventually scrapped altogether.

A message from race control delivered 56 minutes after the session was supposed to start said: 'P2 is cancelled. No medical helicopter operations for the next 2 hours.'

Flash flood warnings have already been issued in the Austin area with heavy rainfall forecast to batter Texas through until Saturday evening.

Nico Rosberg was fastest in Friday's rain-hit opening practice session for the United States Grand Prix.

Nico Rosberg was fastest in Friday's rain-hit opening practice session for the United States Grand Prix.

Rosberg is 73 points behind Mercedes team-mate Lewis Hamilton in the driver's standings

Rosberg is 73 points behind Mercedes team-mate Lewis Hamilton in the driver's standings

Rosberg and co are expected to compete in wet and blustery conditions this weekend

Rosberg and co are expected to compete in wet and blustery conditions this weekend

The bad weather in Texas meant that the second session of practice was cancelled on Friday

The bad weather in Texas meant that the second session of practice was cancelled on Friday

Flash flood warnings have already been issued in the Austin area with heavy rainfall forecast to batter Texas until Saturday evening

Flash flood warnings have already been issued in the Austin area with heavy rainfall forecast to batter Texas until Saturday evening

Qualifying is now also under threat and could to be cancelled if the abhorrent conditions fail to improve over the next 24 hours.

The latest weather forecast suggests up to 30cms of rain could fall in the region and qualifying, which is scheduled to take place on Saturday afternoon may be moved to Sunday ahead of the race.

Earlier, Nico Rosberg set the pace in the first practice session - which was also disrupted by bad weather.

The German, who has been cast 73 points adrift of Lewis Hamilton, posted a best lap of minute 53.989 seconds to finish more than one second faster than the Red Bull of Daniil Kvyat. Daniel Ricciardo was third in the sister Red Bull, 1.6 secs adrift of Rosberg.

Hamilton, who will win the championship on Sunday if Sebastian Vettel finishes third or lower, completed only four laps on Friday morning. He was 1.7 seconds slower than his Mercedes team-mate and finished fifth in the standings.

The Briton, bidding to become only the 10th driver in Formula One history to win the championship on more than two occasions, has seen his path to glory made considerably easier after Vettel was hit with a 10-place grid drop for taking on a new engine.

Ferrari driver Vettel, who completed 10 laps, was sixth in Friday's opening session - marginally slower than the man whom he trails in the championship. 

Lewis Hamilton is bidding to be the 10th driver in F1 history to win the championship more than twice

Lewis Hamilton is bidding to be the 10th driver in F1 history to win the championship more than twice

Hamilton will win the championship on Sunday if Sebastian Vettel finishes third or lower

Hamilton will win the championship on Sunday if Sebastian Vettel finishes third or lower

Vettel pictured taking on the wet and blustery conditions in America on Friday during practice

Vettel pictured taking on the wet and blustery conditions in America on Friday during practice

Hamilton (lower) was 1.7 seconds slower than his Mercedes team-mate Rosberg on Friday

Hamilton (lower) was 1.7 seconds slower than his Mercedes team-mate Rosberg on Friday

Carlos Sainz was fourth for Toro Rosso with his team-mate Max Verstappen seventh. Kimi Raikkonen finished eighth for Ferrari with Fernando Alonso, who is running an updated Honda engine here in Austin, ninth. The Williams of Valtteri Bottas completed the top 10.

Bottas provided a scare for his Williams mechanics during the session when he lost control of his car as he approached his garage. Four members of his pit crew had to take evasive action by leaping out of the way.

'Sorry about the pit-lane, there is just so much less grip than I thought,' an apologetic Bottas said.

 

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