Bay of Plenty has joined several parts of the country under an orange warning for heavy rain.

MetService said in its 10am update the region could expect 100 to 140mm of rain between 11am Friday and 3am Saturday.

The warning covers the entire region, including Rotorua.

Areas east of Kawerau and Gisborne/Tairawhiti north of Ruatoria could expect heavy rain until 6am.

There is also moderate risk of thunderstorms this evening for Coromandel and Bay of Plenty with strong wind gusts of 90 to 100km/h.

Heavy rain warnings are also in place for Northland, Auckland, Great Barrier Island, Coromandel Peninsula and Waikato until tonight while MetService has upgraded the heavy rain warning level for Tasman from orange to red – meaning there is now a threat to life “from dangerous river conditions, significant flooding and slips”.

Bay of Plenty Civil Defence said it did not expect the weather to cause any significant issues but warned a lot of people would be on the roads for the end of school holidays.

“It is also a good idea to make sure you have snacks, water and something warm with you in the car, just in case you get stuck somewhere for longer than you had planned.”

NZ Transport Agency Waka Kotahi warned drivers should be prepared for slippery road surfaces.

“The ground is already sodden from higher than usual rainfall in June, meaning there is a risk of flooding in low lying areas, as well as slips, surface water and debris on the road.”

Early rain clears to fine weather for the Bay of Plenty tomorrow, while Sunday is cloudy with possible showers.

It comes after two weeks of similar rain watches and warnings for the region, previously described by one meteorologist as acting like a “scoop” for wild weather.

Parts of Bay of Plenty received more than 100mm of rain in 24 hours last Thursday, with flooding reported.