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PDC Global Flood Survey

PDC Weekly Global Flood Survey: March 1, 2012

PDC Global Hazards Atlas Displaying 7 day precipitation accumulation and PDC Integrated Active Hazards.

The long-term La Nina precipitation pattern that has dominated Pacific weather of late, has not yet altered, despite the change of seasons coming up in less than three weeks (winter to spring in the northern hemisphere, summer to fall in the southern hemisphere).  Over the past seven days, precipitation has been heavy in many parts of the globe, resulting in flooding on every continent.  For the first few weeks of March, broad patterns are unlikely to change. Conditions in Australia and South America, below, include numerous active flood events, some of them impacting local populations. Again, the weather conditions in these areas are unlikely to change over the next several days.

Precipitation & Flooding: Australia

Figure 2. PDC Global Hazards Atlas centered over Australia displaying 7 day precipitation accumulation and PDC Integrated Active Hazards.

Figure 2 above is centered over Australia  and displays 7-day precipitation accumulation.  It is clear that almost all of Australia has experienced precipitation, with some isolated areas of heavy rainfall.  Localized flooding has been widespread, and PDC is currently monitoring six ongoing flood events.

This satellite image of Australia is provided by the Australia Government, Bureau of Meteorology

 New South Wales Flooding:  According to RSOE EDIS Event Report, flooding in this area has been active for over 10 days, with no signs of easing.  More than 2,200 people have spent the night in evacuation centers across northwest New South Wales as flooding continues. Approximately 1,600 people were evacuated from homes in North Moree, Yarraman, Gwydirfield and Bendygleet, with the Mehi River forecast to burst its banks this Friday morning March 2.

An additional 680 people left their homes in Pallamallawa and Biniguy, east of Moree, as the Gwydir River began to flood. Authorities may ask 1,650 residents in Wee Waa to evacuate the area early Friday March 2 as the Namoi River threatens to flood.  As of Thursday night, March 1, there were 9,000 people isolated by flood waters across New South Wales.

The forecast for New South Wales includes continued precipitation over the next several days.

Precipitation & Flooding: South America

Figure 3. PDC Global Hazards Atlas centered over South America and displaying 7 day precipitation accumulation and PDC Integrated Active Hazards.

South America was significantly impacted by heavy rains over the past week (Figure 3).  Currently PDC is monitoring six large flood events throughout Central and South America.

This satellite image provided by NASA displays current conditions in South America.

Bolivia Flooding: According to the Act Alliance Alert, three days of heavy rains in Bolivia have caused rivers to overflow in the region where the borders of Peru, Brazil, and Bolivia converge.  The flooding has caused severe and widespread water contamination, raising concerns about potential health risks. Access to safe, potable water access for residents is the major concern at this time.

The forecast for Bolivia over the next several days.

Looking Ahead

Over the next week, PDC will continue to monitor areas of high precipitation and keep a close eye on flooding across the globe.  Currently PDC is monitoring flood events in the following areas: Algeria, Australia, Bolivia, Brazil, Cyprus, Ecuador, Guatemala, Honduras, Indonesia, Kazakhstan, Madagascar, Malaysia, Mozambique, Nigeria, Peru, Philippines, Tanzania, Tunisia, Zambia

For the most up-to-date information on these flood events and all-hazards, download the free PDC Disaster Alert mobile app for iOS and Android devices.