Based on hourly data of both basic; elements forecasting fields and physical quantity diagnosing fields of MMS，and the temperature records of 25 stations in Ningxia from September 2002 to August 2003，multivariate and stepwise regressions were adopted to set up the MOS model of 48 hours hourly temperature forecast in 25 stations in Ningxia.  The effect test、onduc;ted from June 2004 to May 2005 indicates that the MOS method has a good(apability in forecasting 48 h hourly temperature in Ningxia.  As weather(hanged smoothly the forecast result of MOS was stable and mean absolute errors were within 2℃;When the(old air invaded the forecast result was unstable but it was much better than that of original product of MMS.  Some of the TS grades of 24 hours extreme temperature fnrenast are nlnse to nr even hetter than that of fnrenaetere

By using a total of 49 years（1955~2003）duststorm data from 13 representative sites in Ningxia，We established a intensity standard of regional dust storm in Ningxia，divided extremely strong，strong，andordinary dust storm after 1955，and studied the time and intensity evolving features of Ningxia dust storm.By the analyse of temporal-spatial distribution features of sand stormsc ontrast to Gansu province，Some scientific basis of sand storm monitoring，warning，forecasting and preventing were provided for the east of Northwest China.