616 
FXUS63 KUNR 290933
AFDUNR

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
333 AM MDT FRI MAR 29 2013

.SHORT TERM...TODAY THROUGH SATURDAY NIGHT
ISSUED AT 310 AM MDT FRI MAR 29 2013

LATEST ANALYSIS SHOWS UPPER RIDGE BUILDING OVER THE FORECAST AREA.
AT THE SURFACE HIGH PRESSURE WAS LOCATED OVER THE MIDWEST WITH A
LOW PRESSURE TROUGH EXTENDING FROM CENTRL MONTANA INTO
NORTHWESTERN SOUTH DAKOTA. SOUTHERLY WINDS WILL ADVECT WARMER AIR
INTO THE REGION TODAY. HIGH TEMPERATURES WILL BE WELL INTO THE 60S
ON THE PLAINS...WITH SOME AREAS POSSIBLY REACHING 70 DEGEES TODAY.
A COOL FRONT WILL MOVE INTO NORTHWESTERN SOUTH DAKOTA AND
NORTHEASTERN WYOMING THIS AFTERNOON. A FEW SHOWERS AND
THUNDERSTORMS MAY DEVELOP AS THE FRONT CROSSES THE AREA. THE BEST
CHANCES OF THUNDERSTORMS WILL BE OVER THE BLACK HILLS AND ALSO
OVER SOUTH CENTRAL SOUTH DAKOTA. SFC CAPE IN BOTH OF THOSE AREAS
IS EXPECTED TO REACH 800J/KG. A SECONDARY COOL FRONT WILL CROSS
THE REGION TONIGHT. RAIN SHOWERS AND FEW SNOW SHOWERS ARE EXPECTED TO
DEVELOP BEHIND THE FRONT AND SPREAD SOUTHWARD OVERNIGHT. SATURDAY
WILL BE BREEZY TO WINDY AND SLIGHTLY COOLER WITH HIGHS IN THE 50S.
THERE IS A CHANCE OF RAIN SHOWERS OVER NORTHEASTERN WYOMING...THE
BLACK HILLS AND SOUTHWESTERN SOUTH DAKOTA ON SATURDAY.
 
&&

.LONG TERM...SUNDAY THROUGH THURSDAY
ISSUED AT 310 AM MDT FRI MAR 29 2013

STRONG UPPER LOW DROPS SOUTH ACROSS SOUTH CENTRAL CANADA LATE IN THE 
WEEKEND. COLD FRONT DROPS SOUTH THROUGH THE DAKOTAS...PRODUCING 
LIGHT RAIN/SNOW CHANCES ON SUNDAY. DRY WEATHER IS EXPECTED THROUGH  
THE REMAINDER OF THE LONG TERM. COLD TEMPERATURES WILL HANG AROUND 
MONDAY...BUT THEN A WARM UP IS EXPECTED THROUGH MID WEEK AS AN UPPER 
RIDGE CROSSES THE REGION.

&&

.AVIATION...FOR THE 12Z TAFS THROUGH 12Z SATURDAY MORNING
ISSUED AT 310 AM MDT FRI MAR 29 2013

VFR CONDITIONS EXPECTED THROUGH SATURDAY MORNING. ISOLD-SCT THUNDERSTORMS
ARE POSSIBLE LATE THIS AFTERNOON INTO THIS EVENING.

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

$$

SHORT TERM...10
LONG TERM...15
AVIATION...15