NATIONAL WEATHER SERVICE NORMAN OK740 PM CDT THU OCT 18 2007
.UPDATE..WIND ADVISORY ALLOWED TO EXPIRE AT 6 PM. ATMOSPHERE DECOUPLED RAPIDLY...WITH GUSTS VIRTUALLY DISAPPEARING FROM THE OBS AT 00Z. TREND OF LIGHT WINDS SHOULD CONTINUE OVERNIGHT AS LOW PRESSURE CONTINUES EASTWARD...RELAXING THE GRADIENT.THOUGH HIGH RELATIVE HUMIDITY WAS IN PLACE AROUND 600 MB...SUBSIDENCE SHOULD INCREASE OVERNIGHT WITH MID LEVEL TROUGH AXIS MOVING EAST. EXPECT VERY CLEAR SKIES AND GOOD RADIATIONAL COOLING.STILL ENOUGH OF A GRADIENT TO KEEP DOWNSLOPE WINDS AT 5 OR 10 MPH...WHICH MAY PREVENT TEMPERATURES FROM ENTIRELY BOTTOMING OUT...BUT WILL NOT BE SURPRISED TO SEE A FEW UPPER OR EVEN MID 30S READINGS IN NORTHWEST OK. WHILE NOT OUT OF THE QUESTION TO SEE FROST IN THAT AREA...IT SHOULD BE EXTREMELY LIMITED...SO WILL KEEP IT OUT OF THE FORECAST AT THIS TIME. BURKE
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