Area forecast discussion...updated National Weather Service Jackson MS 845 PM CDT Friday may 24 2013 Update...expect mostly clear skies tonight across the arklamiss as high pressure continues to build in. Lows tonight will range from the middle 40s in the east...to the upper 50s across the west. The only change to the current forecast was to slightly adjust the hourly temperatures to account for the latest trends. /27/ && Aviation...VFR conditions will prevail as a cool/dry late may airmass keeps the weather quiet across our County Warning Area. Look for light NE or calm winds tonight that will transition to light east-southeast/southeast winds on Saturday. /Cme/ && Previous discussion... /issued 401 PM CDT Friday may 24 2013/ Discussion... Tonight through Sunday... A few showers and thunderstorms could affect the Jonesville to Natchez area late this afternoon in a region of weak moist frontal convergence. Otherwise...high pressure currently building over the arklamiss will remain anchored over the arklamiss this weekend. The dry airmass will bring unseasonably cool temperatures tonight...possibly near record levels in eastern Mississippi where lows are expected to fall into the middle/upper 40s. Temperatures will warm well into the 80s Saturday with low relative humidity. Sunday...a weak middle level shortwave trough meandering eastward through the ridge axis along the MS river could combine with daytime heating to initiate a few showers and thunderstorms over western portions of the forecast area. Have added slight chance category probability of precipitation to account for this. /Ec/ Sunday night through Thursday... Building middle level heights and southerly low level flow will develop and persist through the early to middle parts of next week. This will lead to highs generally in the middle to upper 80s with gradually increasing humidity. The lack of instability and deep moisture combined with the high heights should keep conditions dry through the period. /SW/ && Preliminary point temps/pops... Jackson 53 87 58 88 / 0 0 6 5 Meridian 47 84 50 89 / 0 0 5 4 Vicksburg 56 86 60 87 / 0 2 9 13 Hattiesburg 54 88 54 88 / 0 0 4 4 Natchez 59 86 62 85 / 4 8 6 15 Greenville 56 84 61 87 / 0 2 7 15 Greenwood 50 83 56 88 / 0 0 6 7 && Jan watches/warnings/advisories... MS...none. La...none. Arkansas...none. && $$ 27/cme/ec/SW