Area Forecast Discussion
Issued by NWS Aberdeen, SD

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FXUS63 KABR 011513 AAA
AFDABR

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE ABERDEEN SD
913 AM CST SUN FEB 1 2015

.UPDATE...
UPDATED THE FORECAST THIS MORNING TO CANCEL THE WINTER WEATHER
ADVISORY FOR THE I-90 CORRIDOR. WEB-CAMS SUGGEST FAIRLY GOOD
CONDITIONS WITH LITTLE BLOWING SNOW. ALSO WITH COLD AIR ADVECTION
TODAY...HAVE LOWERED HIGHS A FEW DEGREES FOR MOST LOCATIONS.

&&
.PREVIOUS DISCUSSION...
.SHORT TERM...TODAY THROUGH TUESDAY
WITH THE EXCEPTION OF THE FAR NORTHEAST CWA...LIGHT SNOW PERSISTS
ACROSS THE THE REGION. VISIBILITIES HAVE GENERALLY REMAINED ABOVE
1 TO 2 MILES THROUGH THE NIGHT...SO ANY ADDITIONAL ACCUMULATIONS
SHOULD BE LIGHT. NO OFFICIAL SNOW REPORTS THIS MORNING...BUT THE
AREA TO POTENTIALLY SEE THE GREATEST ACCUMULATION WILL BE THE FAR
SOUTHERN CWA. LEFT THE WINTER WEATHER ADVISORY IN PLACE UNTIL
REPORTS COME IN THIS MORNING. SNOW WILL GRADUALLY END FROM NORTH
TO SOUTH AS MUCH DRIER ARCTIC AIR CONTINUES TO PUSH SOUTH. WINDS
THIS MORNING ALSO REMAIN GUSTY...AND WIND CHILL VALUES RANGE FROM
TEN BELOW TO TWENTY BELOW ZERO. TEMPERATURES ARE ONLY EXPECTED TO
DROP A FEW MORE DEGREES...AND WINDS SHOULD DECREASE THROUGH THE
MORNING...SO DID FORGO ANY WIND CHILL HEADLINES. ONE OR TWO
LOCATIONS COULD BRIEFLY HIT THE TWENTY FIVE BELOW WIND CHILL
CRITERIA THIS MORNING HOWEVER.

HIGH PRESSURE TAKES OVER THIS AFTERNOON...WITH TEMPERATURES ONLY
RISING INTO THE SINGLE DIGITS OR LOW TEENS TODAY. THE RIDGE SHIFTS
EAST...BECOMING SITUATED OVER EASTERN SOUTH DAKOTA BY EARLY MONDAY
MORNING. CLEAR SKIES...LIGHT WINDS...AND A DUSTING OF FRESH SNOW
WILL ALLOW FOR MONDAY MORNING LOWS TO PLUMMET INTO THE SINGLE
DIGITS BELOW ZERO FOR MUCH OF THE REGION...AND IF ANYTHING...THIS
FORECAST MAY BE ON THE WARM SIDE.

A VERY COMPACT AND FAST MOVING SHORTWAVE IS STILL ON TRACK TO
MOVE ACROSS THE REGION MONDAY...BUT MOISTURE PROFILES SUGGEST VERY
LITTLE IN THE WAY OF SNOWFALL WITH THIS FEATURE. THE OTHER CHANCE
FOR LIGHT SNOWFALL WILL BE TUESDAY...ALONG A TIGHT THERMAL
GRADIENT EXTENDING FROM NORTHWEST TO SOUTHEAST ACROSS THE CWA. LIGHT
SNOW ACCUMULATIONS ARE POSSIBLE TUESDAY.

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY
UPPER LEVEL NORTHWEST FLOW WILL BE DOMINANT THROUGHOUT THE
EXTENDED PERIOD. NOT MUCH IN THE WAY OF UPPER LEVEL ENERGY...WITH
JUST A WEAK WAVE MOVING THROUGH ON THURSDAY AND ANOTHER LATE IN
THE PERIOD.

AT THE SURFACE... A LITTLE LIGHT SNOW IS POSSIBLE ACROSS THE WEST
TUESDAY NIGHT AS LOW PRESSURE EXITS THE REGION AND HIGH PRESSURE
APPROACHES FROM THE NORTH. THE HIGH WILL BE DOMINANT OVER THE AREA
THROUGH THE DAY THURSDAY...THEN THE REGION WILL BE BETWEEN THE
HIGH TO THE EAST AND LOW PRESSURE SLOWLY APPROACHING FROM THE
NORTHWEST. THE LOW FINALLY DROPS OVER THE AREA LATE IN THE
PERIOD...POSSIBLY BRINGING SOME LIGHT RAIN OR LIGHT SNOW TO THE
NORTHERN AND EASTERN CWA ON SATURDAY.

WEDNESDAY WILL BE THE COLDEST DAY OF THE PERIOD WITH HIGH PRESSURE
FIRMLY IN PLACE...THEN WILL SEE WAA DEVELOP FOR THE REMAINDER OF
THE PERIOD. HIGHS IN THE TEENS TO LOWER 20S WILL BE COMMON ON
WEDNESDAY...IN THE 20S AND 30S THURSDAY...THEN IN THE 30S AND 40S
FRIDAY AND SATURDAY.

&&

.AVIATION...
12Z TAFS FOR THE KABR...KATY...KPIR AND KMBG TERMINALS

MVFR/LOW END VFR CIGS WILL REMAIN IN PLACE ACROSS THE AREA THROUGH
THE MORNING HOURS...ALONG WITH MVFR VSBYS IN LIGHT SNOW. THE SNOW
WILL COME TO AN END BY EARLY AFTERNOON...WITH VFR CONDITIONS THEN
PREVAILING THROUGH THE REMAINDER OF THE TAF PERIOD.

&&

.ABR WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
MN...NONE.
&&

$$
UPDATE...SD
SHORT TERM...SERR
LONG TERM...PARKIN
AVIATION...PARKIN

WEATHER.GOV/ABERDEEN




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