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Area forecast discussion 
National Weather Service Norman OK 
955 PM CST Friday Nov 21 2008 


Update... 
the only change to the forecast made this evening was to lower 
overnight min temperatures a little. Most areas were not changed at 
all...but forecast minimum temperatures were reduced a few degrees in 
areas of northern OK where the numbers from the previous forecast will 
be reached shortly. Minimum temperatures were also brought down a little 
across western North Texas. 


Hourly temperature grids were altered accordingly. 


&& 


Previous discussion... /issued 553 PM CST Friday Nov 21 2008/ 


Aviation... 
no aviation concerns tonight. South wind will continue through the 
next 24 hours... but pressure gradient relaxes in the west 
tomorrow compared to today and so winds should not be too high. 
Very dry atmosphere so few if any clouds expected. 


Previous discussion... /issued 204 PM CST Friday Nov 21 2008/ 


Discussion... 
single digit dewpoints have developed in southeast portions of the forecast area 
this afternoon. With the dry air and lighter winds expected in 
this area... temperatures will likely fall quickly tonight and 
may be one of the coldest spots of the forecast area. Southerly winds will 
continue over the weekend. Gulf moisture will spread northward into 
the area Saturday in the southerly flow. Meanwhile... a middle and 
upper level trough will move across the plains this weekend 
dragging a cold front across the forecast area Sunday. This airmass will be 
mainly Pacific in origin so not expected to be as cold as what 
affected the area yesterday and today. With the increasing 
moisture... there will be a chance of a few rain showers across 
mainly the southeast third of the forecast area Sunday/Sunday night. Low clouds and 
possibly fog/drizzle will also affect portions of the forecast area Sat 
night/Sunday. 


Models show upper ridge affecting the plains early next week as system 
digs south along the West Coast. Models show warm air advection developing across 
the Southern Plains Thursday ahead of this system... with the system 
moving through the area Friday. With the warm air advection and then the actual 
system over the area... showers and maybe some thunderstorms will be 
possible Thursday and Friday across the forecast area. 


&& 


Preliminary point temps/pops... 
Oklahoma City OK 28 55 40 60 / 0 0 0 10 
Hobart OK 28 56 38 64 / 0 0 0 10 
Wichita Falls Texas 29 60 46 67 / 0 0 0 10 
gage OK 23 56 30 62 / 0 0 0 0 
Ponca City OK 24 54 36 55 / 0 0 0 10 
Durant OK 27 50 42 61 / 0 0 10 20 


&& 


Oun watches/warnings/advisories... 
OK...none. 
Texas...none. 
&& 


$$ 


03/26