A method of forecasting the heavy rainfall in the miyun reservoir basin is developed , according to the synoptic situation during the heavy rainfall , by means of the interpretation and application of nwf outputs , and the local observations
2.
Please note that the observations may change from time to time , as well as from place to place , for reasons ranging from changes in the synoptic situation to short - term or local changes due to the complex coastal and mountainous terrain in hong kong
3.
Please note that the observations may change from time to time , as well as from place to place , for reasons ranging from changes in the synoptic situation to short - term or local changes due to the complex coastal and mountainous terrain in hong kong
4.
The analysis of the large - scale synoptic situation shows that strong precipitation is closely related to the explosion of monsoon and the intensification of cross - equatorial flow which bring a lot of vapor and meet with cold masses at the eastern of northwest district on 8th , june causing extremely heavy rainfall ; that subtropical high - level jet at 200hpa , subtropical high at 500hpa and low - level jet at 850hpa are the weather backgrounds favorable to strong precipitation ; that the pattern of eastern highs and western lows and the establishment of a low - level jet and the coupling between upper - and low - level patterns that determine that the rain occurred in the east of the northwest china ( on average , this is the rainy season for the south of china , but not for the northwest china ) ; that water vapor comes from southerly and easterly flow which converge at the eastern of northwest district with convergence mainly in lower levels and pbl ; that the high value of the whole - level apparent heat source < q1 > is near the area of large rainfall in the direction of northeasterly - southwesterly agreeable to shear line very well and the condensation latent heat releasing is main heat source with vertical advection item playing key role in q1 and q2 ; that there is a vertical secondary circulation crossing low - lever jet whose ascending branch is at the area of large rainfall ; that the construction of convection instability and conditional symmetry instability results that there is not only deep thermal instability , but also moisture influx and triggering mechanism of thermal instability causing strong torrential rain
5.
A state high - tech enterprise - kunming north infrared technology co , ltd . ( knit ) which was established three years ago is regarded as a studied object . part three introduces the synoptic situation of knit and its former cost control system , and evaluates its deficiencies . this will paves the way to redesign the cost control - system of knit
6.
By analyzing the rainfall data of 20 hydrological stations in the miyun reservoir basin from 1970 to 1993 , the relationship between 45 heavy rainfall events and synoptic situations , nwf outputs , the forecast indexes and synoptic patterns are put forward , and 24 - hour heavy rain forecast equations of june , july , august in the miyun reservoir basin are developed
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