000 
FXUS63 KUNR 250807
AFDUNR

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
205 AM MDT SUN MAY 25 2008

.DISCUSSION...STACKED LOW ACROSS WESTERN NORTH DAKOTA THIS 
MORNING...WILL SLOWLY DRIFT EAST TODAY. SURFACE TROF WILL SWING 
THROUGH WESTERN SOUTH DAKOTA WITH MODEST 850-700MB COLD ADVECTION. 
WILL BECOME WINDY ACROSS THE PLAINS OF NORTHWEST SOUTH DAKOTA. 
FORECAST SOUNDING INDICATE 250-500J/KG CAPE ACROSS THE BLACK HILLS 
THIS AFTERNOON...A FEW SHOWERS/THUNDERSTORMS POSSIBLE THIS AFTERNOON 
AND EVENING. 

SHORTWAVE RIDGING ACROSS THE AREA EARLY MONDAY...WILL GIVE WAY TO 
DECENT SHORTWAVE MONDAY NIGHT/TUESDAY. STRENGTH OF Q/G FORCING AND 
MID LEVEL INSTABILITY WILL RESULT IN NUMEROUS SHOWERS/THUNDERSTORMS. 
NORTHEASTWARD EXTENT OF PRECIPITATION SHIELD WILL BE FIGHTING DRY 
AIR FROM HIGH PRESSURE ACROSS EASTERN DAKOTAS. 

EXTENDED...THE REGION WILL REMAIN UNDER WEST TO SOUTHWEST FLOW ALOFT 
DURING THE MIDDLE AND LATTER PART OF THE WEEK...RESULTING IN A 
FAIRLY UNSETTLED PATTERN. WEDNESDAY CONTINUES TO LOOK DRY AT THIS 
TIME...WITH WARMER TEMPERATURES...AS THE AREA WILL BE BETWEEN 
SYSTEMS. CHANCES FOR STORMS WILL RETURN ON THURSDAY AND LINGER 
THROUGH FRIDAY...AS ANOTHER DISTURBANCE PASSES OVER THE NORTHERN 
PLAINS. 

&&

.AVIATION...SOME MVFR/IFR CIGS ARE EXPECTED ACROSS NORTHWESTERN 
PORTIONS OF THE REGION THROUGH EARLY THIS MORNING...INCLUDING KGCC 
FOR A BRIEF TIME. OTHERWISE...VFR CONDITIONS WILL PREVAIL ELSEWHERE 
THROUGH THE AFTERNOON. LOW LEVEL WIND SHEAR WILL CONTINUE AT KRAP 
THROUGH 12Z...WITH STRONG WEST-SOUTHWEST WINDS JUST OFF THE 
SURFACE. 

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
WY...NONE.
&&

$$