Area Forecast Discussion
Issued by NWS Rapid City, SD

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000
FXUS63 KUNR 020947
AFDUNR

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
347 AM MDT THU APR 2 2015

.SHORT TERM...TODAY THROUGH FRIDAY NIGHT
ISSUED AT 323 AM MDT THU APR 2 2015

UPPER LEVEL ANALYSIS HAS BROAD TROF ACROSS THE WESTERN CONUS WITH
CLOSED LOW SLIDING SOUTHEAST ACROSS SOUTHERN CANADA. SKIES ARE
MAINLY CLEAR ACROSS NORTHERN PORTIONS OF THE FORECAST AREA...WITH
CLOUD COVER MOVING IN ACROSS NORTHEAST WYOMING AND FAR SOUTHERN
SOUTH DAKOTA. AT THE SURFACE...WEAK HIGH PRESSURE RESIDES OVER
WYOMING AND WESTERN NEBRASKA WITH LOW PRESSURE ACROSS SOUTHERN
CANADA. TEMPERATURES ARE IN THE MID 20S TO MID 30S WITH LIGHT
WESTERLY WINDS.

TODAY...NORTHERN STREAM UPPER LOW SWINGS THROUGH NORTHERN
MINNESOTA AS SECONDARY SHORTWAVE MOVES THROUGH UTAH. SURFACE TROF
ASSOCIATED WITH CANADIAN UPPER LOW WILL MOVE THROUGH THE SOUTH
DAKOTA PLAINS TODAY...TIGHTENING THE PRESSURE GRADIENT. NORTHWEST
WINDS WILL INCREASE THIS MORNING ACROSS NORTHWEST SOUTH DAKOTA AND
PERSIST THROUGH LATE AFTERNOON. NORTHWEST WINDS OF 20 TO 30 MPH
WITH GUSTS TO 45 MPH CAN BE EXPECTED AS THE SURFACE TROF SLIDES
THROUGH. TEMPERATURES WILL BE COOL TODAY...MAINLY IN THE MID 40S
TO MID 50S...WARMEST ACROSS SOUTH CENTRAL SOUTH DAKOTA. WEAK
ENERGY ASSOCIATED WITH THE MAIN UPPER TROF COULD PRODUCE A FEW
SPRINKLES THIS AFTERNOON ACROSS FAR NORTHEAST WYOMING.

TONIGHT...MAIN UPPER TROF SHIFTS EASTWARD WITH SECONDARY SHORTWAVE
MOVING INTO COLORADO. SURFACE TROF SHIFTS EAST QUICKLY THIS
EVENING WITH WINDS DROPPING OFF BY EARLY EVENING. IT WILL BE A
COOL NIGHT...WITH TEMPERATURES FALLING INTO THE 20S ACROSS MOST OF
THE AREA.

FRIDAY...UPPER TROF SHIFTS EAST WITH RIDGE STARTING TO BUILD INTO
THE AREA. WEAK SHORTWAVE WILL CROSS THE AREA DURING THE
AFTERNOON...POSSIBLY BRINGING A FEW SPRINKLES TO NORTHERN PORTIONS
OF THE FORECAST AREA. OTHERWISE...SKIES WILL BE VARIABLY CLOUDY
WITH SEASONABLE TEMPERATURES EXPECTED...AND LESS WIND.

.LONG TERM...SATURDAY THROUGH WEDNESDAY
ISSUED AT 323 AM MDT THU APR 2 2015

AN UPPER LEVEL RIDGE WILL DOMINATE THE WEATHER FOR THE UPCOMING
EASTER WEEKEND WITH WARMER TEMPERATURES EXPECTED. A SLIGHTLY MORE
ACTIVE WEATHER PATTERN DEVELOPS NEXT WEEK WITH A FEW DISTURBANCES
AND SOME CHANCES FOR PRECIPITATION.

&&

.AVIATION...(FOR THE 12Z TAFS THROUGH 12Z FRIDAY MORNING)
ISSUED AT 323 AM MDT THU APR 2 2015

VFR CONDITIONS EXPECTED THROUGH THE PERIOD. GUSTY NORTHWEST WINDS
WILL REDEVELOP LATER THIS MORNING WITH GUSTS ABOVE 35KTS AT
TIMES.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...WIND ADVISORY FROM 9 AM THIS MORNING TO 6 PM MDT THIS EVENING
     FOR SDZ001-002-012>014-073.

WY...NONE.
&&

$$

SHORT TERM...15
LONG TERM...HELGESON
AVIATION...HELGESON



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