CRITERIA FOR SEVERE WEATHER warning

 

Warning Stages

Criteria

Possible Impact

Possibility of a monsoonal surge in the next 24 to 48 hours.

 

Moderate monsoon rain is currently occurring or expected to occur in the next 24 hours.

Low-pressure system/tropical depression with sustained wind speed of 50 - 60 kmph accompanied by moderate to heavy rain

Flooding over low-lying areas and areas by river banks.

Strong wind with sustained wind speed of 50-60 kmph (whole tree in motion; inconvenience felt when walking against wind) with slight to moderate rain and has lasted for the last 2 hours.

Thatched/zinc roofs can be blown off by the wind.

Heavy widespread monsoon rain is currently occurring or expected to occur in the next few hours.

Tropical storm/typhoon with sustained wind speed of al least 60 kmph accompanied by moderate to heavy rain.

Flooding over low-lying areas and areas by the river banks.

Swift water currents can be dangerous to children playing besides monsoon drains and river banks.

Strong wind with sustained wind speed of at least 60 kmph (breaks twigs off trees; generally impedes progress when walking against wind; structure damage occurs) with moderate to heavy rain has lasted for the last 2 hours.

Thatched/zinc roofs can be blown off by the wind.