Wake Low Winds

Rockford Lutheran's Dugout

We had an interesting day of weather.  It started out with a severe thunderstorm watch issued at 8:55am for a severe line of storms moving ENE at 40 mph.  The main line of storms started to move more easterly and passed through Whiteside, Lee, Ogle and DeKalb County.  This massive storm complex was also producing torrential rainfall with totals nearing 3 inches in some places.  With the main part of the squall line passing just to our south, most of us thought we were in the clear and soon the rain would quiet down as well.  However, after the rain ended, strong-gusty winds picked up behind the heavy rainfall.  Here is what happened.  What we experienced was a wake low.  A wake low is an area of low-pressure that sometimes forms behind a squall line that has stratiform rain behind the main line of storms. However, there can also be a pocket of high pressure that forms because of the rain-cooled air.  With these two pressures close to each other, it can cause strong-gusty winds behind the main storm complex.  Rockford Lutheran School experienced these gusty winds.  The wind was clocked at 46 mph by the the automated observation system at Rockford International Airport.

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Posted under weather, weather geek

This post was written by qni_it on May 29, 2011

2 Comments so far

  1. tony May 29, 2011 6:22 PM

    I know after the wake low wind, a huge tree was knocked down at the bottom of our street.

  2. Fake Burberry Scarf November 13, 2011 8:14 PM

    いくつかの情報が欲しいし、Google の彼を探していた。最初のページに来たし、の関連性の高い結果を取得していない各ページを訪問した、2 番目を確認し、私のブログを得たと思います。これは何を望むかです !

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