Despite a midweek snowstorm, it’s still Severe Weather Awareness Week in the state of Pennsylvania. It’s a time where meteorologists spread awareness of the different types of severe weather, and how you can prepare for them as the spring season begins. Today’s topic touches upon River Flooding.
River Flooding is generally caused by prolonged periods of heavy rainfall. These periods of heavy rain can cause river levels to rise above flood stage, and when levels reach a certain value, property and homes can be in trouble. River flooding can occur at any time of year, but normally spring and summer are the most prone times. For example, extensive snow melt during a period a heavy rainfall is a common setup for river flooding during the spring season.
When the National Weather Service sees the imminent threat for river flooding, a River Flood Warning is issued. A warning means river levels are expected to exceed flood stage at certain points along the area’s larger rivers. The warning includes the river(s) of concern, along with forecasted river levels at particular locations. The impact is measured in stages: minor, moderate, and major. These stages are determined by river levels, and the impacts those levels bring to surrounding areas.
Sources: http://fox43.com/2013/03/07/thursdays-severe-weather-awareness-week-topic-river-flooding/#axzz2MrvV1PBp
No comments:
Post a Comment