Scientific Forecaster Discussion

NWS Discussion
			
				

Area forecast discussion 
National Weather Service Little Rock Arkansas 
1247 PM CDT Thursday may 23 2013 


Aviation... 
a cold front continues to move through southern Arkansas. Cirrus 
blowoff from storms in Oklahoma continue to overspread Arkansas. 
Some middle clouds are also mixed in. Also cumulus started developing 
in south Arkansas below the cirrus deck. Chances of showers are 
very low. Did not include precipitation in the tafs. East winds 
will increase Friday morning. VFR conditions expected through the 
period. 


&& 


Previous discussion... /issued 610 am CDT Thursday may 23 2013/ 


Discussion... 


Updated to include the 12z aviation discussion below... 


Aviation... 


Overall VFR conditions are expected over the next 24 hours. Few to 
scattered clouds will be seen with some broken ceilings due to 
convection over Oklahoma spreading southeast today. This afternoon 
some isolated convection may be seen at central to southern taf 
sites...but only went with vcsh at this time due to uncertainty if 
thunderstorms will hold together or redevelop. Winds will be light 
this morning becoming more west to northwest less than 10 knots through the 
day. Also a weak cold front will sag into Arkansas late day to this 
evening and bring some additional clouds but remain VFR...while 
winds will become more north to NE at less than 10 knots. 


Previous discussion... /issued 209 am CDT Thursday may 23 2013/ 


Short term...today through Sunday 


Disturbance aloft will move southeast over southwestern Arkansas this afternoon as upper 
flow turns northwest over the region. This disturbance could trigger some 
rain showers/thunderstorms and rain across portions of the County Warning Area...at the same time a cold 
front moves southeast through the state late this afternoon and evening. 
Have the best probability of precipitation...even though only slight chance...across the western 
and southwestern third of the County Warning Area. Precipitation chances will remain across the far 
SW and west during the overnight hours...but again only slight chance 
for now as the front progresses SW. 


Much drier and cooler air will move into the state behind this 
front...with no precipitation expected for Friday and Friday night. Temperatures will be 
below normal for this period...with highs generally in the upper 60s 
to upper 70s on Friday. Sat morning lows will be cool...with lows in 
the upper 40s to upper 50s. 


Warming will begin by Sat afternoon as surface winds turn to the 
south...as well as with an upper ridge overhead. This ridge will 
begin weakening some late for sun. Weak upper disturbances will 
ridge over this weakening upper ridge to the north and northwest of the 
state...with increased chances for rain showers/thunderstorms and rain for late in the period. 
Best chances for any precipitation will be across the northern and northwestern 
counties sun and Sun night. Highs on sun will be back in the 70s 
and 80s...with lows generally in the 60s. 


Long term...Monday through Wednesday 


The extended forecast generally has surface high pressure to the 
east of Arkansas with a south wind flow into the region...while an upper 
high pressure ridge will be over much of the east central to eastern 
plains and to the eastern U.S. This will keep mostly dry and warm 
weather conditions...with gradual increasing moisture over the 
region. Early in the extend forecast some upper energy may reach 
northwestern areas and a slight chance of convection is in the 
forecast over these areas. After that the upper ridge over the area 
should keep any chances very low...and mainly only an isolated 
afternoon to early evening storm would be possible. Temperatures will be at 
or a bit above normal values. 


&& 


Preliminary point temps/pops... 
Batesville Arkansas 53 73 51 78 / 10 0 0 10 
Camden Arkansas 64 79 58 83 / 20 10 0 10 
Harrison Arkansas 52 72 52 78 / 10 0 0 20 
Hot Springs Arkansas 61 77 56 81 / 20 10 0 10 
Little Rock Arkansas 60 75 55 80 / 10 0 0 10 
Monticello Arkansas 62 78 56 81 / 20 10 0 10 
Mount Ida Arkansas 60 77 56 81 / 20 10 0 10 
Mountain Home Arkansas 51 73 52 78 / 10 0 0 10 
Newport Arkansas 54 73 51 78 / 10 0 0 10 
Pine Bluff Arkansas 61 76 55 80 / 20 0 0 10 
Russellville Arkansas 59 76 55 80 / 10 10 0 10 
Searcy Arkansas 57 73 51 78 / 10 0 0 10 
Stuttgart Arkansas 59 74 53 79 / 10 0 0 10 
&& 


Lzk watches/warnings/advisories...none. 
&& 


$$ 




Aviation...51