Scientific Forecaster Discussion

NWS Discussion
			
				

Area forecast discussion 
National Weather Service Jackson Kentucky 
241 PM EDT Thursday may 23 2013 


Short term...(this evening through Friday night) 
issued at 223 PM EDT Thursday may 23 2013 


The models are in pretty good agreement with the timing of the systems 
moving across the area. A weak cold front is currently moving across 
the area. It has produced scattered showers across the Coal fields 
and there has also been a couple of thunderstorms mainly near the WV 
border. There is a front with cooler air behind it which will be moving 
across the area this evening. It will also bring some scattered 
showers to the area tonight. One concern is how cold will it get on 
Friday night as the clouds move out of the area and the winds stay 
light. Expecting to some some patchy valley frost that 
evening...however no hard freezes. 


Long term...(saturday through thursday) 
issued at 241 PM EDT Thursday may 23 2013 


Models are in decent agreement through the remainder of the 
weekend...but start to diverge by early next week with confidence in 
the forecast much less from Monday Onward. The period will start with 
surface high centered over the area...providing tranquil conditions. 
By late in the weekend...a warm front will develop over the Ohio 
Valley. The GFS is much more aggressive with the warm front lifting to 
the northeast...while the European model (ecmwf) is much slower. A compromise of the 
two would keep the boundary in our vicinity through 
midweek...supporting some isolated showers and thunderstorms across a 
portion of the area each day. This may be confined to the afternoon 
and evening each day. Otherwise...no significant pieces of energy 
rotating through the area...so it looks like isolated activity may be 
the best we do into next week. Of course with the models in 
disagreement on evolution...things could change warranting a period 
of higher probability of precipitation. After cooler weather this weekend...a gradual warming 
trend is anticipated into next week as the warm front lifts across 
the area. 


&& 


Aviation...(for the 18z tafs through 18z Friday afternoon) 
issued at 223 PM EDT Thursday may 23 2013 


Scattered showers will continue this afternoon and gradually work 
their way into Tennessee and WV. Another round of scattered showers is 
expected tonight as the secondary cold front moves through the area. 
With the winds staying up this evening...expecting stratus to form 
this evening instead of fog. The taf stations will see some LIFR 
ceilings in the morning. This will clear out in the morning by 12-13z. 




&& 


Jkl watches/warnings/advisories... 
none. 
&& 


$$ 


Short term...jj 
long term...kas 
aviation...jj