Abstract:

Giwing temperature ,precipitation ,lowest temperature and raindays over Cransu province in May 2002. Analysis of unconventionality of subaltern tropic high pressure for phases.position and intensity of polar swirl.and vapor and cold atmosphere conditions.Calculating correlation with precipitation and SST in the Pacific over Cransuprovince in May ,and compare with portent signal in representative similitude years.

Key words: Censu province , low temperature and rainness, portent signal

摘要：

给出了廿肃省2002年5月的温度、降水、极端最低气温和雨日概况，分析了西太平洋副热带高压阶段性的异常、极涡的位置和强度以及水汽条件和冷空气条件，计算了甘肃省5月降水与太平洋海温的相关性并与典型相似年份的前兆信号进行了比较。

关键词: 甘肃省, 低温多雨, 前兆信号