Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 260533
AFDUNR

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
1033 PM MST THU DEC 25 2014

.UPDATE...
ISSUED AT 1031 PM MST THU DEC 25 2014

BETTER SNOWS CONTINUE TO WIND DOWN ACROSS THE SOUTHERN CWA THIS
EVENING WITH MINOR ADDITIONAL ACCUMULATIONS OVERNIGHT. WILL DROP
ALL ADVISORIES AS A RESULT.

UPDATE ISSUED AT 513 PM MST THU DEC 25 2014

LATEST RADAR LOOPS AND SHORT TERM RAP/HRRR GUIDANCE SHOW NORTH
EDGE OF NOTABLE -SN SHIFTING SOUTH AT A DECENT CLIP. WILL DROP A
STRIP OF NORTHERN COUNTIES FROM THE ADVISORY AS ADDITIONAL
ACCUMULATIONS WILL BE MINOR FOR THOSE AREAS.

&&

.SHORT TERM...THIS EVENING THROUGH FRIDAY NIGHT
ISSUED AT 201 PM MST THU DEC 25 2014

SPINNING OVER UTAH....THE UPPER LOW CONTINUES TO PUSH SNOW
NORTHEASTWARD INTO THE CWA. MEANWHILE...HIGH PRESSURE AND DRY AIR
ARE MOVING IN FROM THE NORTH...AND SNOW IS GRADUALLY ENDING ACROSS
NORTHWESTERN SD. NORTHERLY WINDS ARE 15-20 MPH...CAUSING SOME
PATCHY BLOWING SNOW. TEMPERATURES ARE IN THE 20S TO LOWER 30S AND
FALLING.

INCOMING HIGH PRESSURE WILL CONTINUE TO PUSH SNOW SOUTHEASTWARD
TONIGHT. SOUTH CENTRAL INTO SOUTHWESTERN SD COULD SEE ANOTHER 2-4
INCHES OF SNOW OVERNIGHT ALONG A BAND OF FRONTOGENESIS THAT
GRADUALLY DIMINISHES. NORTHERLY WINDS WILL ALSO DECREASE...ALTHOUGH
THERE MAY STILL BE A LITTLE PATCHY BLOWING SNOW. LOWS WILL RANGE
FROM 5 TO 20...WARMEST ACROSS SOUTH CENTRAL SD.

HIGH PRESSURE WILL KEEP WINDS LIGHT ON FRIDAY. UNDER PARTLY CLOUDY
SKIES...HIGHS WILL BE AROUND 20. LOWS WILL BE IN THE SINGLE
DIGITS.

.LONG TERM...SATURDAY THROUGH THURSDAY
ISSUED AT 201 PM MST THU DEC 25 2014

DRY BUT COLD CONDITIONS WILL CONTINUE ON SATURDAY BEFORE THE NEXT
UPPER WAVE EMBEDDED IN THE PERSISTENT NW FLOW ALOFT BRINGS ANOTHER
ROUND OF LIGHT SNOW TO MUCH OF THE AREA SUNDAY INTO EARLY MONDAY.
THIS WAVE WILL ALSO BRING EVEN COLDER AIR INTO THE REGION AS A
1055MB HIGH BUILDS SOUTHEAST INTO THE NRN PLAINS. TEMPS ON MONDAY
WILL STRUGGLE THROUGH THE SINGLE DIGITS WITH WIND CHILLS OF -10 TO
-20F...WHILE LOW TEMPS MONDAY NIGHT WILL FALL WELL BELOW ZERO.
TEMPS WILL SLOWLY MODERATE BY MID WEEK WITH DRY CONDITIONS
EXPECTED.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z FRIDAY NIGHT)
ISSUED AT 1031 PM MST THU DEC 25 2014

WIDESPREAD IFR/MVFR CIGS WILL BLANKET THE AREA THROUGH FRIDAY.
THERE COULD BE SOME VFR BREAKS AS WELL AS SOME LOCAL IFR VSBYS DUE
TO BR OVERNIGHT AND EARLY FRIDAY. LEFTOVER IFR VSBYS DUE TO SNOW
ACROSS SOUTHERN SD WILL END BY FRIDAY MORNING.

&&

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

$$

UPDATE...HELGESON
SHORT TERM...POJORLIE
LONG TERM...JOHNSON
AVIATION...HELGESON



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