shirt sleeves weather

This caused a couple of international phone calls to my friends in the area.ところで、shirt sleeve weatherって何でしょうか？さびしいcamel-cactusくん、どうぞ。 (UG)
TORRENTIAL rainstorms wreak havoc in America’s south west leaving motorists stranded in their cars and forcing hundreds to flee their homes.
California has been battered by storms for the past week and Los Angeles has been flooded by 7.67inches of rain since Thursday last week – when the average rainfall for December is 1.91.
Governor Arnold Schwarzenegger has announced a state of emergency for the worst hit areas and rescuers have been battling to clear flooded roads before more predicted storms threaten to hit a state where shirt sleeves weather is taken for granted in December.
The storms have also hit Arizona, where a holiday home collapsed into the mud after a river burst its banks.Meteorologist Brian Edwards, of AccuWeather, said: “This has been an unbelievably wet week. ”
http://www.mirror.co.uk/news/top-stories/2010/12/24/storm-hell-in-states-of-emergency-115875-22803849/#ixzz196K60800