Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 282324
AFDUNR

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
524 PM MDT THU MAY 28 2015

.SHORT TERM...THIS EVENING THROUGH FRIDAY NIGHT
ISSUED AT 255 PM MDT THU MAY 28 2015

CURRENT SURFACE MAP SHOWS TROF OF LOW PRESSURE ACROSS THE CENTRAL
DAKOTAS. WATER VAPOR IMAGERY PLACES CLOSED UPPER LOW OVER
SOUTHWEST WYOMING. WIDESPREAD THUNDERSTORMS OVER THE FORECAST
AREA...ESPECIALLY OVER NORTHEAST WYOMING INTO NORTHWEST SOUTH
DAKOTA. UPPER LOW TRACKS SLOWLY ALONG WY/CO BORDER
OVERNIGHT...AND INTO WESTERN NEBRASKA FRIDAY. WITH DECENT QG
FORCING AND STEEP LAPSE RATES...SHOWERS/THUNDERSTORMS WILL
CONTINUE THROUGH THE TONIGHT INTO FRIDAY.

.LONG TERM...SATURDAY THROUGH THURSDAY
ISSUED AT 255 PM MDT THU MAY 28 2015

UPPER LEVEL RIDGE DEVELOPS OVER THE NORTHERN PLAINS FOR
THE WEEKEND AS CANADIAN SURFACE HIGH PRESSURE SETTLES INTO THE AREA.
RETURN FLOW SETS UP SATURDAY BRINGING WARMER TEMPERATURES THROUGH
THE WEEKEND INTO MONDAY. SMALL CHANCES OF SHOWERS AND THUNDERSTORMS
WILL ALSO BE POSSIBLE SUNDAY AND MONDAY. GREATER PRECIPITATION
CHANCES RETURN FOR THE MIDDLE OF NEXT WEEK AS A WESTERN TROF
REDEVELOPS AND UPPER FLOW OVER THE NORTHERN PLAINS BECOMES
SOUTHWESTERLY.

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z FRIDAY EVENING)
ISSUED AT 521 PM MDT THU MAY 28 2015

SHRA/TSRA WILL TREND TOWARD SHRA WITH ISOLATED TS LATER TONIGHT
AND JUST SHRA FRIDAY. MVFR CIGS/VSBYS WILL BE COMMON WITH THE
HEAVIER PRECIPITATION...BUT AS A COLD FRONT DROPS THROUGH THE AREA
OVERNIGHT...WIDESPREAD MVFR CIGS WILL DEVELOP WITH LOCAL IFR
CONDITIONS OVER THE HIGHER TERRAIN OF THE BLACK HILLS.

&&

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

$$

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


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