Criteria for advisory/warning information
| Advisory | Warning | |
|---|---|---|
| Strong wind | Wind speed exceeding 14m/s or wind speed of moment exceeding 20m/s are expected on land. But, wind speed exceeding 17m/s or wind speed of moment exceeding 25m/s are expected in mountain areas. | Wind speed exceeding 21m/s or wind speed of moment exceeding 26m/s are expected on land. But, wind speed exceeding 24m/s or wind speed of moment exceeding 30m/s are expected in mountain areas. |
| Wind wave | Wind of 14m/s or more sustains for over 3 hours at sea or significant wave height is expected to be over 3m. | Wind of 21m/s or more sustains for over 3 hours at sea or significant wave height is expected to be over 5m. |
| Heavy rain | The precipitation for 6 hours is expected to be more than 70mm or the precipitation for 12 hours to be over 110mm. | The precipitation for 6 hours is expected to be more than 110mm or the precipitation for 12 hours to be over 180mm. |
| Heavy snow | Snowfall is expected to be more than 5cm in 24 hours. | Snowfall is expected to be more than 20cm in 24 hours. In mountain areas, however, the snowfall is expected to be more than 30cm in 24 hours. |
| Dry air | Effective humidity of 35% or less is expected for at least 2 days. | Effective humidity of 25% or less is expected for at least 2 days. |
| Storm surge | Sea level is expected to rise locally due to
complex factors, such as astronomical tides, storms and low
pressures, and to surpass the standard point to issue the
advisory. ref) the standard point is set by regions. |
Sea level is expected to rise locally due to
complex factors, such as astronomical tides, storms and low
pressures, and to surpass the standard point to issue the
advisory. ref) the standard point is set by regions. |
| Cold wave | When any of the following is expected between
October and April: ① Morning minimum temperature is predicted to drop by more than 10℃ than the previous day to below 3℃ and to lower by 3℃ compared to the climatological normal year; ② Morning minimum temperature of -12℃ or less is expected for more than 2 days; ③ Serious damage is expected due to rapid temperature drop. |
When any of the following is expected between
October and April: ① Morning minimum temperature is predicted to drop by more than 15℃ than the previous day to below 3℃ and to lower by 3℃ compared to the climatological normal year; ② Morning minimum temperature of -15℃ or less is expected for more than 2 days; ③ Serious damage is expected over a wide range of areas due to rapid temperature drop. |
| Typhoon | Strong wind, wind wave, heavy rain and storm surge are expected to reach advisory levels due to typhoon. | When any of the following is expected to fall
under due to typhoon: ① Strong wind(or Wind wave) is expected to reach warning levels; ② The total precipitation is expected to be more than 200mm; ③ Storm surge is expected to reach warning levels. |
| Asian dust (HWANGSA) | Hourly average dust(PM10) concentration is expected to exceed 400㎍/㎥ for over 2 hours due to Asian dust. | Hourly average dust(PM10) concentration is expected to exceed 800㎍/㎥ for over 2 hours due to Asian dust. |
| Heat wave | Between June and September, the daily maximum feel temperature of more than 33℃ is expected for over 2 days. | Between June and September, the daily maximum feel temperature of more than 35℃ is expected for over 2 days. |