Heavy Rain Advisory Maintained
Overview
A Heavy Rain Advisory is a weather warning issued by the Korea Meteorological Administration when heavy rainfall is expected over a certain period. 'Heavy Rain Advisory Maintained' means that the advisory remains in effect without being lifted, indicating that the risk of damage from continuous rainfall remains high. While the advisory is maintained, citizens need to exercise special caution and prepare in advance.
Main Content
Definition and Issuance Criteria of Heavy Rain Advisory
A Heavy Rain Advisory is issued when the Korea Meteorological Administration forecasts 3-hour rainfall of 60 mm or more, or 12-hour rainfall of 110 mm or more. This is to warn of situations where heavy rain over a short period increases the risk of flooding, landslides, and river overflow. The maintenance of the advisory means that these criteria continue to be met or may worsen.
Meaning of Heavy Rain Advisory Maintained
While the Heavy Rain Advisory is maintained, the following situations may persist:
- Rainfall intensity does not weaken or even strengthens
- Ground is already saturated, making it vulnerable to additional rainfall
- River levels continue to rise or approach dangerous levels
- Ground in landslide-prone areas remains unstable
Public Action Guidelines When Heavy Rain Advisory is Maintained
1. Ensure Indoor Safety: Refrain from going out, and if in a semi-basement or underground space, evacuate immediately.
2. Prepare for Flooding: Check home drainage systems and prepare sandbags, etc.
3. Check Traffic Information: Regularly check road flooding and traffic control situations, and avoid driving.
4. Beware of Landslides: Residents near mountainous or steep slope areas should prepare for evacuation.
5. Listen to Weather Information: Continuously check the latest information from the Korea Meteorological Administration via TV, radio, or smartphone apps.
Difference Between Heavy Rain Advisory and Heavy Rain Warning
A Heavy Rain Warning is a higher-level alert than a Heavy Rain Advisory, issued when 3-hour rainfall of 90 mm or more or 12-hour rainfall of 180 mm or more is expected. If the advisory is maintained and the criteria are exceeded, it may be upgraded to a warning. Therefore, even while the advisory is maintained, the possibility of worsening conditions should always be considered.
Special Management During Heavy Rain Advisory Maintenance
When a Heavy Rain Advisory is maintained for an extended period, the Korea Meteorological Administration takes the following actions:
- Subdivide advisory areas to focus on high-risk zones
- Cooperate with local governments for resident evacuation and disaster response
- Strengthen monitoring of river, dam, and reservoir levels
- Increase surveillance activities in landslide-prone areas
Latest Trends
Since 2024, the Korea Meteorological Administration has further refined the criteria for issuing heavy rain warnings and introduced AI-based rainfall prediction models to improve the accuracy and timeliness of advisories. In particular, due to climate change, localized heavy rain has become more frequent, leading to a trend of longer maintenance times for Heavy Rain Advisories compared to the past. In 2025, the disaster text message system was improved so that citizens can receive real-time risk information during 'Heavy Rain Advisory Maintained' situations, and customized evacuation manuals for each local government have been distributed. Additionally, an advisory system linked to smart drainage systems is being piloted to prevent urban flooding.
Related Topics
- [[Weather Warning]]
- [[Heavy Rain Warning]]
- [[Flood Preparedness]]
- [[Landslide Prevention]]
- [[Climate Change and Heavy Rainfall]]
---
AI auto-generated document · Improved by the community