Hotspot Watch 11 December 2019

Hotspot Watch 11 December 2019

Across the South Island, substantial rainfall during the past week led to soil moisture increases along the lower West coast, Fiordland, parts of Otago, lower Canterbury along with northern Tasman and Marlborough.

Hotspot Watch 5 December 2019

Hotspot Watch 5 December 2019

The driest soils across the North Island compared to normal for this time of the year are now found in southern Northland, northern Auckland, much of the Coromandel Peninsula, the Hauraki District, and coastal Wairarapa.

Hotspot Watch 28 November 2019

Hotspot Watch 28 November 2019

The driest soils compared to normal for this time of the year are found in coastal Wairarapa, where the drying trend continued during the past week.

Hotspot Watch 20 November 2019

Hotspot Watch 20 November 2019

Soil moisture levels are likely to increase along the West Coast and in parts of the lower South Island during the next week, while most other areas will see little change.

Hotspot Watch 14 November 2019

Hotspot Watch 14 November 2019

Across the North Island, moderate to large increases in soil moisture levels were observed in most locations due to substantial rainfall in the past week.

Hotspot Watch 6 November 2019

Hotspot Watch 6 November 2019

In the South Island, soil moisture levels decreased in most locations during the past week as rainfall was generally below normal and above to well above average temperatures were commonplace.

Tropical Storm Barry Pits New Orleans Against Water—Again

Tropical Storm Barry Pits New Orleans Against Water—Again

More than two centuries of trying to control the Mississippi with engineering and trying to protect New Orleans from floods and storms has made the city more vulnerable to severe weather—which is exactly what gets more likely with climate change .Levees along the Mississippi and its intersecting rivers, as well as channels for navigation and all kinds of other engineering, make the river as important to North America’s economy as it is to the continent’s hydrology.

NIWA's Hotspot Watch for 1 May 2019

NIWA's Hotspot Watch for 1 May 2019

Hotspots in the North Island are currently found in Aupouri Peninsula, interior Manawatu-Whanganui, and interior Hawke’s Bay. In the South Island, only subtle soil moisture changes were observed in the past week.

NIWA's Hotspot Watch for 17 April 2019

NIWA's Hotspot Watch for 17 April 2019

A weekly update describing soil moisture across the country to help assess whether severely to extremely dry conditions are occurring or imminent. Due to the anticipated rainfall amounts over the next week, soil moisture levels will likely increase at least slightly across much of the North Island.

NIWA's Hotspot Watch for 10 April 2019

NIWA's Hotspot Watch for 10 April 2019

Conversely, the lower east coast and the far south (including Hawke’s Bay, coastal Wairarapa and Wellington) saw a soil moisture increase due to rainfall totals above average for the time of year.

NIWA's Hotspot Watch for 4 April 2019

NIWA's Hotspot Watch for 4 April 2019

However, hotspots remain in place across western Northland and Aupouri Peninsula, a small portion of central Waikato, southern Manawatu-Whanganui, and much of Wairarapa and southern Hawke’s Bay. In the South Island, soil moisture levels generally did not change significantly in the past week.

NIWA's Hotspot Watch for 20 March 2019

NIWA's Hotspot Watch for 20 March 2019

The driest soils across the North Island compared to normal for this time of the year are found in eastern Northland, northern Waikato, and Bay of Plenty, while the wettest soils for this time of the year are located near Wellington City.

NIWA's Hotspot Watch for 13 March 2019

NIWA's Hotspot Watch for 13 March 2019

Outlook and Soil Moisture A slow-moving weather pattern with moist, northerly air flows near New Zealand will most likely cause normal or above normal rainfall across the central and northern South Island and western North Island over the next week.

NIWA's Hotspot Watch for 6 March 2019

NIWA's Hotspot Watch for 6 March 2019

The wettest soils for this time of the year are located in parts of Gisborne, eastern Bay of Plenty and southern coastal Hawke’s Bay. Areas deemed hotspots have expanded over the past week.

NIWA's Hotspot Watch for 28 February 2019

NIWA's Hotspot Watch for 28 February 2019

The driest soils across the North Island compared to normal for this time of the year are found in central Taranaki District and parts of western Waikato where the soil moisture levels continue to be well below average for this time of year.

What Is an Atmospheric River?

What Is an Atmospheric River?

Don’t know why it’s raining this way All this water and skies are so gray Pack an umbrella; wear some Gore-Tex You haven’t seen the worst of it yet I wanna knoooooow you won’t tell me This rain’s gonna stay Atmospheric river, drops on us the water Atmospheric river, pours even more water Washing us down, washing us down Has this song been stuck in the heads of every Californian for a month?

NIWA's Hotspot Watch for 20 February 2019

NIWA's Hotspot Watch for 20 February 2019

Outlook and Soil Moisture In the North Island, rainfall amounts during the next week could be highly variable due to uncertainty regarding the interaction between moisture from Tropical Cyclone Oma and a separate area of low pressure expected to form near New Zealand on Sunday and Monday (24-25 February).

NIWA's Hotspot Watch for 13 February 2019

NIWA's Hotspot Watch for 13 February 2019

Soil moisture levels as of 13 February are below normal for the vast majority of the North Island, with the driest soil compared to normal for this time of year in the New Plymouth District, parts of western coastal Waikato and the Aupouri Peninsula.

NIWA's Hotspot Watch for 7 February 2019

NIWA's Hotspot Watch for 7 February 2019

Across the South Island, soil moisture levels decreased during the past week with meagre rainfall in the north and east.

NIWA's Hotspot Watch for 31 January 2019

NIWA's Hotspot Watch for 31 January 2019

Across the South Island, soil moisture levels generally decreased in northern areas, although small improvements were observed in interior Otago, Southland, and Stewart Island.

NIWA's Hotspot Watch for 16 January 2019

NIWA's Hotspot Watch for 16 January 2019

Across the South Island, soil moisture levels generally decreased slightly in most locations, although small improvements were observed in Tasman and Buller District during the past week.

NIWA's Hotspot Watch for 9 January 2019

NIWA's Hotspot Watch for 9 January 2019

The driest soils in the North Island compared to normal are currently found in the eastern Far North District, around New Plymouth, and coastal Horowhenua. Across the South Island, soil moisture levels generally increased in Southland and the lower West Coast and remained constant or slightly decreased elsewhere.

NIWA's Hotspot Watch for 19 December 2018

NIWA's Hotspot Watch for 19 December 2018

The driest soils across the North Island compared to normal for this time of year are found across the Far North and Kaipara Districts in Northland, western Auckland, around New Plymouth, in the Central Plateau, and along west coastal Manawatu-Whanganui.

NIWA's Hotspot Watch for 12 December 2018

NIWA's Hotspot Watch for 12 December 2018

Across the North Island, soil moisture levels generally decreased during the past week due to lower than average rainfall for this time of year.

NIWA's Hotspot Watch for 6 December 2018

NIWA's Hotspot Watch for 6 December 2018

With the rainfall amounts anticipated in the next week, additional soil moisture improvements are likely parts of the central and eastern North Island with the greatest potential for soil moisture increase from the eastern Bay of Plenty through to the Hawke’s Bay regions, particularly in the higher terrain.

NIWA's Hotspot Watch for 29 November 2018

NIWA's Hotspot Watch for 29 November 2018

In the North Island, another week of substantial rainfall is likely in many areas, which could lead to further soil moisture improvements. With substantial rainfall amounts anticipated in the next week, additional soil moisture improvements are likely in the northern half of the North Island.

NIWA's Hotspot Watch for 21 November 2018

NIWA's Hotspot Watch for 21 November 2018

Across the South Island, soil moisture levels generally did not change substantially in northern areas this past week, but soils in central and southern areas continued to get much wetter than normal thanks to more heavy rainfall in recent days.

Cities Cause Hurricanes to Dump Extra Rain on Them

Cities Cause Hurricanes to Dump Extra Rain on Them

“We said, what if we replaced the urban area of Houston with cropland?” Using a system called the Weather Research and Forecasting model to simulate climate and its changes over a region (as opposed to models with lower resolution but wider geographic scope), that’s actually possible.

NIWA's Hotspot Watch for 7 November 2018

NIWA's Hotspot Watch for 7 November 2018

Although flooding is likely in the West Coast due to the upcoming heavy rainfall, this will also mean significant increases in soil moisture levels across much of the South Island during the next week.

NIWA's Hotspot Watch for 14 November 2018

NIWA's Hotspot Watch for 14 November 2018

With the rain amounts expected in the east and north, soil moisture levels are anticipated to improve in the next week, while soil moisture should stay near constant or slightly decrease in the rest of the island where many locations will see total rain amounts less than 15mm.