SELECTION SUMMARY
도입 판단 요약
For each reported flash flood event, the flash flood warning lead-time is the difference in minutes between the issuance of a flash flood warning and the onset of a geographically corresponding flash flood event. The lead times for all flash flood events, within the United States and territories served by the National Weather Service, are averaged to calculate the national average flash flood warning lead-time metric for a given fiscal year. This average includes all warned events with zero lead times and all unwarned events. Historically, flash flood warnings were issued and verified on a countywide basis. Starting in FY 2010, the storm-based warnings were implemented with verification based solely for the areas impacted by the warning and event.
이 제품의 적합 용도와 제한 조건은 아직 검수하지 않았습니다. 태그와 카테고리는 찾아가는 길이지 적합성 보증이 아닙니다.
