Presentation on theme: "SEVERE WEATHER FORECASTING AND WARNING SERVICES IN UGANDA By Nambalirwa Mary Vincent Senior Meteorological Officer."— Presentation transcript:
SEVERE WEATHER FORECASTING AND WARNING SERVICES IN UGANDA By Nambalirwa Mary Vincent Senior Meteorological Officer.
SEVERE WEATHER FORECASTING Uganda is a landlocked country surrounded by Tanzania in the South, Kenya in the East, Sudan in the North and DR Congo in the West.
GEOGRAGHICAL MAP OF UGANDA
Climate The above map shows the phyisical features which influence the climate of Uganda. These are; Water bodies e.g Lake Victoria, Lake Albert and Lake Kioga. A number of rivers especially River Nile The highland areas e.g Mt. Elgon, Mt. Ruwenzori, And Muhavura ranges and Western Rift Valley Also natural forests affect our climate.
SYNOPTIC FEATURES When preparing Forecasts, we follow closely the synoptic features which affect the weather of Uganda. These are; –The location and movements of the 4 Highs ( St Hellena, Mascarene, Azores, Arabian ridge and the East African ridge). –The movement of the cold fronts and warm fronts both over the Northern and the Southern hemisphere –The location and oscillation of the ITCZ. –The oscillation of the ITD (Congo air mass). With all these we bear in mind the seasons to help where severe weather would occur.
FORECASTS Before preparing the forecasts, we;- –Analyze the synoptic surface charts(0600z and1200z) –Analyze the 300hpa upper air chart. This chart help us in developing the weather systems of the following day. –Check and animate the satellite imagery which is received every 15 minutes. –Download forecasted products from LAM, NCMRWF,ECMWF, Norway and South Africa synoptic weather chart. –All these help us to prepare precise Forecast
LOCALLY FORECASTED SEVERE WEATHER The daily severe weather phenomena forecasted are;- –Heavy thunderstorms –Embended CBs and squall lines –Heavy duststorms (Karamoja and some parts of Northern districts) –Severe Haze (during June-July for southern sector and December- January for Northern) –Thick fog ( South western, Entebbe airport)
Total precipitation amount (mm) From /09/2010 to /09/2010
Synoptic chart for South Africa
Infra red 108 MSG for Southern Africa Valid 0700z 28 Sep 2010
Infra red 108 MSG for Uganda Valid 1500z 27/09/2010
FORECASTs CONTd These are the forecast we prepare;- –One day forecasts. –City forecasts. –3 day forecasts. –Dekadal forecasts. –Medium term forecast( 3moths) –Long term forecasts (6months)
DISSEMINATION Normally daily forecasts are sent to all end users who need it free through the addresses. It is also sent to all MTN mobile users in a certain format. Dekadal forecasts are sent to agricultural officers on districts to help the give good advice and advisory to farmers about the onset and cessation of the wet season. As for Short and long term numeric weather predictions a workshop is always prepared and stake holders are called to be sensitized about the expected seasonal weather. If severe weather is expected eg; - El-Nino or La Nina which normally affect the whole community with either floods or droughts, the Drought and Disaster Management Sector starts preparing for solving the worst to come.
USERS OF THE FORECASTS The following are the major users of our forecasts in the social-economic activities. –Presdent’s Office –Prime minister’s Office –Min.of Deffence –Min. of Agriculture –National Environment Management Authority(NEMA) –Different mass media –Civil aviation Authority –Construction; Research centres; Universities, Colleges etc
CONCLUSION I Think weather Forecasting is vital and only helps the community if taken serious. eg;- during the recent El-Nino, many lives and property were lost over Mt Elgon (Bududa district). Had the community taken Met. Advice seriously at least no life would have been lost.