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2019-11-10 not "maximum instantaneous wind speed of 50 meters", but "wind instantaneously blows at a speed of 180 km/h". [長年日記]

I feel that the accuracy of forecasts by the Japan Meteorological Agency is steadily increasing every year.

I think seriously, "It is great."

I think it is easier for transportation infrastructure and local governments to move forward with predictions, because the agent can make predictions with the correct time and scale up to this point.

Thanks to that, our disaster awareness is also improving.

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But I also have complaints.

This is a method for expressing quantitative values of disasters.

Few people understand the relationship between magnitude and seismic intensity, and earthquakes are difficult to predict, so I think this is not serious problem.

The problem is for typhoon information.

In particular, I think there are two problems.

- Expressing precipitation in millimeters

- Expressing wind speed in metric seconds

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For example,

- not "rainfall of 1000 millimeters per hour", but "One meter water column falls within a radius of dozens of kilometers per hour."

- not "maximum instantaneous wind speed of 50 meters", but "wind instantaneously blows at a speed of 180 km/h".

It's easier to understand that "A blown umbrella flies at a speed of passing a 25-meter pool in 0.5 seconds"

If such a messy amount of water falls all at once, any town can not drain away.

Anyone knows that going out outdoors where things fly at 180 km/h is a suicide act.

In short, how to convey the fear of a disaster is not concrete without being explained in the examples of daily life.

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It's strange for me why the agencies don't tell us why our life become dangerous.

I don't think people of the Japan Meteorological Agency and the media should be aware of this.

There may be a reason. For example, “Don't make people scared more than necessary”.

However, they are calling for "Start action to save your life".

It seems very unreasonable for me not to give the reason.