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HIRDS is regularly used by engineers throughout New Zealand, to assist in designing bridges, culverts and waterways.
#Heavy rain weather software
The output of this research is being incorporated into our environmental forecasting product, EcoConnect.Īdditionally, NIWA has analysed measurements of extreme rainfall throughout New Zealand, and developed the free HIRDS software tool to provide public information on the risk of extreme rainfall. Developing ensemble methods/forecasts by running the model several times with slightly different initial conditions to increase our confidence in forecasting heavy rainfall.Improving the processes that control the dynamic characteristics and predictability of heavy rainfall in the New Zealand region into the NWP model formulations, including the land surface processes needed.On Sunday, the eastern part of Kollam district received heavy rainfall with the weather station at Punalur recording 11.7 cm rain in the last 24 hours. Improving the model performance by incorporating all available meteorological observationsto generate the initial atmospheric conditions as accurately as possible. Pathanamthitta district received 194 per cent extra rain during this period, followed by Kannur, Kasaragod, Kozhikode districts showing 127, 116 and 111 per cent large excess departure.More information on our supercomputing facility Models are run with a resolution of 12km and 1.5km on NIWA's supercomputer. Developing very high resolution numeric weather prediction (NWP) forecast models and investigating the effects of model resolution on heavy rainfall simulation.To achieve this, we are developing and applying improved weather prediction models capable of accurately forecasting severe events in New Zealand. NIWA scientists are currently working within the Reducing the Impact of Weather-Related Hazards Programme to improve hazard mitigation and increase society's resilience to hazards such as heavy rainfall. Where heavy rainfall occurs with high winds, risk to forestry crops is high. landslides, which can threaten human life, disrupt transport and communications, and cause damage to buildings and infrastructure.flooding, including risk to human life, damage to buildings and infrastructure, and loss of crops and livestock.Heavy rainfall can lead to numerous hazards, for example: Heavy rainfall tends be most common over the western coastal region of the South Island and the middle and upper North Island, and least common on the east side of the South Island (due to the prevailing westerlies). New Zealand's mountains tend to modify and amplify precipitation, and this often causes the frequent heavy rainfall we experience. North Tasman Sea lows moving to NZ region.Heavy rainfall occurs over New Zealand mainly because of the following common weather systems: Often, a significant amount of precipitation occurs in only a few hours, leading to severe flooding and landslide risk. In New Zealand, heavy rainfall is relatively common. It is defined as rainfall greater than 100 mm in 24 hours. Heavy rainfall is one of the most frequent and widespread severe weather hazards to affect New Zealand.