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Spring/ Summer 2014 Convection Discussion


weatherwiz

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Good call on extra staff. The models were an absolute soaking overnight no matter what the verbatim solutions were. By 12z they were giving a dumping of rain in some shape or form.

 

post-44-0-41076100-1405483415_thumb.png

 

CREST (distributed hydro model) plus HRRR QPF through the next 6 hours. Basically purple areas would indicate areas of heightened flash flooding concern based on what has fallen, what will fall, or both.

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Still cut that in half you're still at like 40 to 50 yr return....a 2 to 2.5 % chance deal....I'll take that....

 

It's not quite that simple. The model is trying to fit an exponential curve to about 10 years worth of data. So most of these streams have only experienced a 1 in 5 to 10 year flood in that time. So the verification on anything greater than about 2 times your period of record is probably pretty poor. I wouldn't trust things beyond a 25 year return period.

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