The start of the second Thursday practice session at Monaco would see heavy dark clouds heading towards the circuit. There would be a rush of drivers coming out with Bruno Senna being the first of the Williams F1 cars out on the track. Kobayashi was first out with the soft tyre been the tyre of choice early in the session. Pastor would take to the track as announcements were made that rain was expected. The times would come quickly with Perez fastest with a 1m:18.800 from Kobayashi, Di Resta, Hulkenberg, Glock, Vergne, Ricciardo, Button, Hamilton, and Raikkonen in tenth. Bruno was eleventh with a 1m:29.867 while at the front Kobayashi was now fastest with a 1m:17.504 with Di Resta now second.

The times would change rapidly with Schumacher fastest with a 1m:17.349 but Button would move ahead with a 1m:17.095. Hamilton was second but had dropped to third, 1m:17.375. Pastor would improve to be ninth with a 1m:18.305. Bruno was currently thirteenth with a 1m:19.105. Alonso would jump to the top of the times with a 1m:16.944. The only driver yet to set a time was Kovalainen. Di Resta was now fifth from Kobayashi but we would have Webber move up to fourth with a 1m:17.148. Schumacher was now fifth and Hamilton sixth. Pastor would find time setting a 1m:16.820 to be second. Bruno had pitted and was in eleventh with a 1m:17.655. Grosjean would take second from Pastor with a 1m:16.739 while Pastor had pitted after a six lap run.

Button would go fastest with a 1m:15.746, using the super soft tyre. Other drivers were coming out on the softer tyre as Massa moved up to fourth, 1m:16.750. Pastor was now fifth as Pastor also come out on the super soft tyre. Bruno was still in his pit as the rain started to fall and the track was declared wet. As a result the track would empty quickly as the drivers returned to their pits. Petrov would be last to come back in. The rain was expected to last twenty minutes and twenty minutes later we would have Glock come out on the soft tyres. He would be joined by Alonso and Raikkonen as the drivers started to explore the changed track conditions. Pastor would also come out but they would return with the rain continuing to fall. Drivers would start to come out on intermediates including both Torro Rosso cars, Kobayashi, Pic and Glock.

Both Bruno and Pastor would head out onto track for Williams. Both were on intermediates Bruno would have a moment making a mistake at the chicane, then heading down the escape road at the Mirabeau on his next lap. Pastor would follow suit also taking to the escape road at Mirabeau. He was also able to continue. We also had both Ferrari's out on the track along with Webber, Kobayashi, Perez, Petrov, and Kovalainen. Both Williams drivers had pitted while for Red Bull Vettel had also come out. Perez would also take to the escape road at Mirabeau but was able to continue. As the session drew to a close the rain had started to fall a bit heavier with the times well off those set earlier in the session. Webber would set a 1m:34.062 on the intermediates.

Webber would improve with a 1m:31.77 while Massa would lock up at Mirabeau seeing him having to stop and back up to continue. Both Williams drivers were back out with seven minutes remaining. The track was now quite busy as more drivers came out. Kovalainen would join the group of drivers running down the escape road at Mirabeau. Except he was not able to continue as he could not reverse his car and his car was lifted away. In certain parts of the track a dry line was starting to appear as more cars ran on the track. As the session ended Bruno would pit. So with the end of the session Pastor was fifth while Bruno had improved to be thirteenth in their dry weather times.

With the possibility of rain occurring on Saturday this wet track running was of value to the teams as they prepare for qualifying. The weather forecasts had rain falling during qualifying. Drivers would take the opportunity to practice starts on the grid. For Williams based on this early running they are looking quite competitive in the lead-up to the Saturday practice and qualifying. But with variable weather conditions the times that may be set could be very much a lottery with it been a case of getting it right at the times when the track is at it best.

Pos Driver	    	  Team		  	Time       Laps
 1. Jenson Button         McLaren-Mercedes      1m15.746   14
 2. Romain Grosjean       Lotus-Renault         1m16.138s  17
 3. Felipe Massa          Ferrari               1m16.602s  19
 4. Fernando Alonso       Ferrari               1m16.661s  21
 5. Pastor Maldonado      Williams-Renault      1m16.820s  18
 6. Nico Rosberg          Mercedes              1m17.021s  13
 7. Mark Webber           Red Bull-Renault      1m17.148s  21
 8. Kamui Kobayashi       Sauber-Ferrari        1m17.153s  20
 9. Michael Schumacher    Mercedes              1m17.293s  9
10. Sebastian Vettel      Red Bull-Renault      1m17.303s  19
11. Lewis Hamilton        McLaren-Mercedes      1m17.375s  17
12. Paul di Resta         Force India-Mercedes  1m17.395s  19
13. Bruno Senna           Williams-Renault      1m17.655s  18
14. Nico Hulkenberg       Force India-Mercedes  1m17.800s  23
15. Sergio Perez          Sauber-Ferrari        1m18.251s  22
16. Vitaly Petrov         Caterham-Renault      1m18.440s  23
17. Jean-Eric Vergne      Toro Rosso-Ferrari    1m18.522s  20
18. Daniel Ricciardo      Toro Rosso-Ferrari    1m18.808s  24
19. Kimi Raikkonen        Lotus-Renault         1m19.267s  23
20. Timo Glock            Marussia-Cosworth     1m19.309s  27
21. Heikki Kovalainen     Caterham-Renault      1m20.029s  13
22. Charles Pic           Marussia-Cosworth     1m20.240s  19
23. Pedro de la Rosa      HRT-Cosworth          1m20.631s  12
24. Narain Karthikeyan    HRT-Cosworth          1m20.886s  10