jesse gary, ktvu fox 2 news. >>> flash flood watches have been issued for parts of southern california. a surge of monsoonal moisture has brought thunderstorms and lightning across l.a. and ventura county. the threat of thunderstorms extends across the coastal waters through thursday. >>> to help beat the heat in the south bay the city of san jose has five cooling centers with ex steaded hours today. the centers are locate at community centers around the city. they opened at 8:00 this morning and close at 9:00 tonight. >>> let's bring in our chief meteorologist bill martin. what do you think of the thunderstorms down there in l.a.? are they that bad? >> they could get a flash flood out of it if you get right under one. like in the mountains today we have some strong thunderstorms up around truckee, up around mammoth. it's not a long endurance event. it's more just heavy rain for 15 minutes, but you drop a quarter of an inch of rain in 15 minutes and it really creates problems. shouldn't be anything too severe, but if you are flying that way you might see some flight delays this afternoon. these are the temperatures from today. it is hot but not as hot as in redding. it's 115 way