Area forecast discussion 
National Weather Service Shreveport la 
900 PM CDT Sat may 18 2013 


Discussion... 
quiet Summer like weather expected through at least Sunday morning as 
ridging ahead of long wave trough centered over Colorado to keep area rain 
free. Some thunderstorms may move into the west portions of deep East Texas and 
extreme southeast OK by Sunday evening...but these should diminish after 
sunset with loss of daytime heating if they indeed do move this 
far east. 


Strong srly surface flow to develop along and ahead of the Texas and OK 
dryline during late Sunday morning through sunset. Have elected to 
Post a lake Wind Advisory for our East Texas and southeast OK counties 
accordingly as we approach a Holiday weekend. Further east...the flow 
should remain just below lake Wind Advisory criteria across southern Arkansas 
and northern la. /Viii/ 


&& 


Aviation... 


Cumulus field has just about dissipated across the region this evening 
with increasing cirrus upstream noted on infrared imagery across southeast into 
central Texas. Low level moisture will once again be on the increase 
overnight in the form of MVFR ceilings. Expect the I-20 corridor 
terminals to see this in the 06-10z timeframe but not quite sold on 
reductions in visibilities as was the case last night. Haze not 
nearly as prominent at this time compared to 24 hours ago but may go ahead 
and tempo a 3-5 mile visibility either side of sunrise at most 
locations. 


As was the case this morning...expecting MVFR/tempo IFR conditions 
to scatter out in the 15-17z timeframe. An increasing pressure 
gradient on Sunday will result in strong S winds sustained near 
12-15kts with gusts as high as 25kts at the tyr/ggg/txk/shv 
terminals during the late morning/afternoon hours on Sunday. 


/13/ 


&& 


Preliminary point temps/pops... 
shv 71 90 73 89 72 / 10 10 10 10 10 
mlu 72 88 72 88 71 / 10 10 10 10 10 
deq 70 88 72 86 69 / 10 10 20 20 30 
txk 70 89 73 86 71 / 10 10 10 10 20 
eld 71 87 72 88 70 / 10 10 10 10 10 
tyr 69 92 71 89 73 / 10 10 10 10 10 
ggg 70 91 72 88 72 / 10 10 10 10 10 
lfk 71 93 72 90 73 / 10 10 10 10 10 


&& 


Shv watches/warnings/advisories... 
Arkansas...none. 
La...none. 
OK...lake Wind Advisory from 10 am to 8 PM CDT Sunday for the 
following zones: okz077. 


Texas...Lake Wind Advisory from 10 am to 8 PM CDT Sunday for the 
following zones: 
txz096-097-108>112-124>126-136>138-149>153-165>167. 


&& 


$$ 


Viii/13