SWAW--Flood Safety

With the heavy snow in the northern Plains and spring melt beginning this is a very timely message on Flood Safety from the NWS. ~ CS

FLASH FLOODING AND FLOOD SAFETY

Turn Around, Don't Drown!!

Tornadoes and Severe Thunderstorms are the first things that come to mind as a severe weather threat, but flooding also deserves plenty of attention. In the past ten years, flooding has accounted for 14 deaths and $41 million in damage in Kansas. In Missouri, flooding has resulted in 46 deaths and $147 million in property damage since 1995. These numbers compare very close to the number of tornadoes deaths (15 and 31) and tornado damage ($208 million and $136 million) across both states respectively during the same time period.


When these warnings are issued for your area, or the moment you realize that a flash flood is imminent, act quickly to save yourself. YOU MAY ONLY HAVE SECONDS WHEN FLOODING THREATENS!


How do flash floods occur?


Several factors contribute to flash flooding. The two key elements are rainfall intensity and duration. Intensity is the rate of rainfall, and duration is how long the rain lasts. Topography, soil conditions, and ground cover also play an important role. Most flash floods are caused by slow-moving thunderstorms or thunderstorms repeatedly moving over the same area.


When a Flood or Flash Flood WATCH is issued, be alert to signs of flash flooding and be ready to evacuate on a moment's notice.


When a Flash Flood WARNING is issued for your area, or the moment you realize that a flash flood is imminent, act quickly to save yourself.


Immediately:


- Get out of areas subject to flooding. This includes dips, low spots, and low water crossings.
- Do not attempt to walk across flowing streams. Water moving swiftly, even just 6 inches deep, can sweep
   you off your feet.
- Be aware that the road bed may not be intact under the water.
- Do not underestimate flood waters. Remember: Turn Around, Don't Drown! Go another way. NEVER
  drive through flooded roads or low water crossings.
- Be cautious at night when flooding is hard to recognize. Also, be aware that storms that are miles away may
  bring raging water your way.


NOAA’s National Weather Service will hold its annual National Flood Safety Awareness week campaign March 17-21, 2008. Each day of the week will highlight a different element of the flood awareness program: