Area Taihape, inland Whanganui and Manawatu north of Bulls about and west of State Highway 1 Expect a further 30 to 60 mm of rain on top of what has already fallen. Peak rates of 10 to 15 mm/h this morning. Impact: Streams and rivers may rise rapidly. Surface flooding, slips, and difficult driving conditions possible. Chance of upgrading to a Red Warning: Minimal. Changes: The chance of upgrade for this Orange Warning has been decreased to Minimal.