Area Forecast Discussion
Issued by NWS Rapid City, SD

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000
FXUS63 KUNR 292054
AFDUNR

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
254 PM MDT FRI MAY 29 2015

.SHORT TERM...THIS EVENING THROUGH SATURDAY NIGHT
ISSUED AT 255 PM MDT FRI MAY 29 2015

CURRENT SURFACE MAP SHOWS HIGH PRESSURE RIDGE BUILDING INTO
WESTERN DAKOTAS. BACK EDGE OF SHOWERS ABOUT TO MOVE SOUTH OF THE
SOUTH DAKOTA STATE LINE. HIGH CONTINUES TO SLIP SLOWLY SOUTHWARD
TONIGHT...WITH CLEARING SKIES. SOME PATCHY FOG POSSIBLE ACROSS
SOUTHWEST SOUTH DAKOTA LATE TONIGHT/EARLY SATURDAY WITH LINGERING
LOW LEVEL MOISTURE.

RETURN FLOW ON BACK SIDE OF HIGH FOR SATURDAY...WITH BREEZY
SOUTHERLY WINDS. WEAK 850-700MB THETA-E ADVECTION SATURDAY NIGHT
MAY RESULT IN A SHRA/TSRA ACROSS NORTHWEST SOUTH DAKOTA.

.LONG TERM...SUNDAY THROUGH FRIDAY
ISSUED AT 255 PM MDT FRI MAY 29 2015

RIDGE AXIS WILL MOVE OVER THE ROCKIES SUNDAY AND SHIFT
EASTWARD OVER THE NORTHERN PLAINS MONDAY...ALLOWING ABOVE AVERAGE
TEMPERATURES TO RETURN TO THE AREA. MAINLY DRY WEATHER IS EXPECTED
ON SUNDAY...BUT WEAK ENERGY PASSING THROUGH THE RIDGE MAY PRODUCE
ISOLATED SHOWERS AND THUNDERSTORMS SUNDAY INTO MONDAY. CHANCES FOR
SHOWERS AND THUNDERSTORMS ARE EXPECTED FOR THE REMAINDER OF THE WEEK
AS A WESTERN TROUGH REDEVELOPS AND UPPER FLOW OVER THE NORTHERN
PLAINS BECOMES SOUTHWESTERLY. HIGHS NEXT WEEK WILL BE NEAR SEASONAL
AVERAGES.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SATURDAY)
ISSUED AT 255 PM MDT FRI MAY 29 2015

MVFR/IFR CONDITIONS ACROSS THE AREA WILL IMPROVE TO VFR
THIS TONIGHT AS DRIER AIR MOVES IN FROM THE NORTH BEHIND A COLD
FRONT. UPSLOPE FLOW IS EXPECTED TO DEVELOP LATE TONIGHT ACROSS THE
ERN BLKHLS...WHICH MAY BRING PATCHY FOG/LOW CIGS ALONG THE FOOTHILLS.

&&

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

$$

SHORT TERM...7
LONG TERM...13
AVIATION...13



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