Area Forecast Discussion
Issued by NWS Goodland, KS

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FXUS63 KGLD 251008
AFDGLD

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
308 AM MST WED FEB 25 2015

.SHORT TERM...(TODAY THROUGH FRIDAY NIGHT)
ISSUED AT 248 AM MST WED FEB 25 2015

A COLDER SURFACE HIGH PRESSURE AREA MOVES INTO THE PLAINS STATES
TONIGHT THROUGH FRIDAY FOLLOWING A COLD FRONT TODAY. WITH
PERSISTENT UPSLOPE FLOW IN PLACE MAINLY OVER EASTERN COLORADO
DURING THIS TIME PERIOD...THE CHALLENGE BECOMES HOW FAR EAST
FAVORABLE UPSLOPE CONDITIONS WILL CONTRIBUTE TO LIGHT SNOW
PRODUCTION AS NORTHWEST FLOW ALOFT BRINGS A SERIES OF SHORT WAVE
THROUGH ACROSS THE CENTRAL HIGH PLAINS REGION.

HAVE KEPT LIGHT SNOW CONFINED TO JUST EASTERN COLORADO TONIGHT
AND THURSDAY AS SURFACE WINDS REMAIN NORTHEASTERLY...AND THEN
BEGIN TO SPREAD IT ACROSS FAR WESTERN KANSAS AND EXTREME
SOUTHWEST NEBRASKA THURSDAY NIGHT AND FRIDAY AS THE HIGH CENTER
MOVES FURTHER SOUTH AND EAST OVER THE PLAINS AND THE RETURN FLOW
AROUND THE HIGH TURNS WINDS OVER THE FORECAST AREA TO THE
SOUTHEAST. SNOW TAPERS OFF SOME AND MOVES SOUTH AS THE UPPER FLOW
SAGS SOUTH AND TURNS MORE WESTERLY.

SNOW AMOUNTS DIFFER BETWEEN MODELS...BUT AREAS EXPECTED TO RECEIVE
SNOW HAVE BEEN SURPRISINGLY CONSISTENT.  CURRENTLY HAVE TOTAL
SNOWFALL AMOUNTS MAXING OUT JUST SHY OF 3 INCHES OVER EAST CENTRAL
COLORADO OVER THE 48HR+ TIME PERIOD THAT LIGHT SNOW WILL BE
POSSIBLE. SNOW AMOUNTS TAPER OFF RAPIDLY AS YOU MOVE AWAY FROM THE
FAVORED UPSLOPE AREAS.

.LONG TERM...(SATURDAY THROUGH TUESDAY)
ISSUED AT 248 AM MST WED FEB 25 2015

SATURDAY THROUGH TUESDAY LOOKS COOL AND SNOWY AS A LONG WAVE TROUGH
DROPS SOUTH OUT OF CANADA...DEEPENING AS IT MOVES SOUTH ALONG THE
WEST COAST.  AS IT DEEPENS NUMEROUS SMALLER SCALE TROUGHS WILL MOVE
DOWNSTREAM OF IT OVER THE AREA.  CURRENTLY THE BEST CHANCE FOR SNOW
WILL BE OVER THE WEEKEND THROUGH MONDAY.

MODELS ARE IN REMARKABLY GOOD AGREEMENT WITH THE TRACK OF THE TROUGH
THROUGH SUNDAY.  FROM MONDAY ONWARD DIFFERENCES BEGIN TO DEVELOP
REGARDING HOW FAR SOUTH THE TROUGH WILL DEEPEN PRIOR TO MOVING
NORTHEAST TOWARD THE TRI-STATE AREA.  SNOWFALL AMOUNTS SIMILAR TO
LAST WEEKEND ARE STILL POSSIBLE...BUT AM BEGINNING TO HAVE LESS
CERTAINTY THOSE SIMILAR AMOUNTS WILL ACTUALLY HAPPEN. THE MAIN
CONCERN IS THE SLOWER TRACK DUE TO THE LOW BECOMING CLOSED
OFF...WHICH MAY GIVE IT MORE TIME TO DEEPEN BEFORE LIFTING
NORTHEAST.  HAVE NOTICED THE SPEED OF THE TROUGH HAS SLOWED DOWN
SINCE LAST NIGHT.  THIS SEEMS REASONABLE GIVEN THE MODELS SHOW THE
TROUGH CLOSING OFF SATURDAY NIGHT AND POSSIBLY LONGER.  IF THE
TROUGH REMAINS CLOSED OFF LONGER IT WILL CONTINUE TO SLOW DOWN.
CURRENT SPEED OF THE TROUGH AFTER SATURDAY MAY STILL BE TOO FAST IF
THE TROUGH BECOMES CLOSED OFF SATURDAY NIGHT.  IN GENERAL SLOWER IS
LIKELY THE BETTER SOLUTION AFTER SATURDAY...WILL HAVE TO SEE HOW
THIS AFFECTS THE TRACK OF THE TROUGH AS IT APPROACHES THE AREA.

A SECOND LONG WAVE TROUGH WILL MOVE SOUTH FROM CANADA EARLY NEXT
WEEK.  MODELS INDICATE A SPLIT UPPER LEVEL FLOW PATTERN DEVELOPING
AS PART OF THE LONG WAVE TROUGH DEEPENS OVER THE WEST
COAST...SEPARATING ITSELF FROM THE REST OF THE TROUGH.  MAIN
QUESTION IS WHERE WILL THE FLOW SPLIT WHICH WILL EFFECT HOW MUCH
SNOWFALL THE AREA WILL RECEIVE.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z WEDNESDAY NIGHT)
ISSUED AT 1020 PM MST TUE FEB 24 2015

VFR CONDITIONS EXPECTED THRU FORECAST PERIOD. SCT-BKN100-150 WILL
GIVE WAY TO BKN035-050 BY 17Z-21Z FROM NORTH TO SOUTH. THERE IS A
CHANCE FOR SOME VCSH THRU THE AFTERNOON AS SYSTEM APPROACHES
REGION WITH NO VISIBILITY REDUCTION. WINDS WILL BE MAIN FOR FOR
THIS FORECAST AS WNW WINDS 10-15KTS THRU 13Z-17ZZ WILL GIVE WAY TO
NORTHERLY WINDS 15-30KTS.


&&

.GLD WATCHES/WARNINGS/ADVISORIES...
KS...NONE.
CO...NONE.
NE...NONE.
&&

$$

SHORT TERM...LOCKHART
LONG TERM...JTL
AVIATION...JN


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