Discussion scientifique du spécialiste des prévisions météorologiques

NWS Discussion
			
				

Area forecast discussion 
National Weather Service Shreveport la 
322 PM CDT Wednesday Jun 19 2013 


Discussion... 


Kshv continues to show widely scattered to scattered shower and 
thunderstorm activity forming along a weak boundary in the 
southern sections of the County Warning Area...mainly in deep East Texas. This 
activity should dissipate with with sunset...but a few showers may 
linger into the late evening. The other feature of concern on the 
weather map is a mesoscale convective system in northwest Texas that continues to migrate 
southeast. Although we are expecting this mesoscale convective system to lose energy 
before it approaches East Texas...there still may be enough energy 
and lift from an outflow boundary to produce some shower and 
thunderstorm activity overnight. I am holding 20 central probability of precipitation in 
overnight in parts of East Texas to respect this feature. 


Models still show the upper ridge building across Texas in the 
short term. The arklatex will be on the eastern fringe of the 
upper ridge...so teaser 20 central probability of precipitation will be common in the 
afternoon time period. However the overall forecast trend will be 
turning dry...with temperatures will generally running near to slightly 
above normal through the period. 


Eleven 


&& 


Aviation... 


Main concern for the 20/00z taf issuance will be flight hazards from 
scattered thunderstorms which are expected to continue into the evening. 
Best coverage for the convection will be south of a kjso to kaex 
line. Otherwise...mostly VFR flight weather expected. However after 
08z and continuing through 14z Thursday...portions of the area along 
and south of Interstate 20 may experience MVFR to briefly IFR ceilings 
and visibilities due to fog. Surface wind light and variable except in the 
vicinity of convection. /14/ 


&& 


Preliminary point temps/pops... 
shv 72 92 72 93 73 / 10 20 10 10 10 
mlu 70 93 70 94 69 / 10 20 10 10 10 
deq 68 90 69 93 69 / 10 20 10 20 10 
txk 69 90 72 93 71 / 10 20 10 10 10 
eld 67 92 69 93 68 / 10 10 10 10 10 
tyr 73 93 73 93 72 / 20 20 10 10 10 
ggg 71 93 72 93 71 / 20 20 10 10 10 
lfk 73 94 72 93 71 / 30 20 10 20 10 


&& 


Shv watches/warnings/advisories... 
Arkansas...none. 
La...none. 
OK...none. 
Texas...none. 
&& 


$$ 


11/14