707
FXUS63 KSGF 091739
AFDSGF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1139 AM CST TUE FEB 9 2010
..UPDATE TO AVIATION
UPDATE
A DEEP CLOSED LOW WAS TRACKING ACROSS NORTHERN MISSOURI TODAY. THE
RESULT WAS STRONG COLD AIR ADVECTION AND INTERMITTENT FLURRIES.
LIGHT SNOW WILL PERSIST FOR AWHILE ACROSS PORTIONS OF THE MISSOURI
OZARKS WHICH COULD RESULT IN AN ADDITIONAL DUSTING OF SNOW. TEMPERATURES
WILL STRUGGLE TO RISE INTO THE LOWER OR MIDDLE 20S THIS AFTERNOON
AND MAY NOT MAKE IT ACROSS CENTRAL MISSOURI. WIND CHILL VALUES
WILL REMAIN IN THE SINGLE DIGITS AND MAY DROP BELOW ZERO AT TIMES.
FOSTER
DISCUSSION
LIGHT SNOW CONTINUES OVER THE EASTERN CWFA EARLY THIS MORNING AS
STRONG UPPER LOW ALONG THE NEB/IA MOVES SOUTHEAST INTO NORTHERN
MO. DEEPEST MOISTURE HAS PAST EAST OF THE REGION...AND WILL LIKELY
CANCEL THE THE REMAINING COUNTIES IN THE WINTER WEATHER ADVISORY
WITH THE FORECAST PACKAGE ISSUANCE.
COLD TEMPERATURES AND A CLEARING SKY ARE PUSHING INTO THE REGION.
MESONET SITES ARE ALREADY DOWN TO NEAR 10 DEGREES OVER THE FAR
NORTHWEST CWFA AND WILL SEE SOME TEMPERATURES BOTTOM OUT WELL DOWN
INTO THE SINGLE DIGITS EARLY THIS MORNING IN THAT AREA. FOLLOWED
(ROUGHLY) 3 HOURLY NAM TEMPERATURES WHICH ARE NOT DOING TOO BADLY
ATTM. WIND CHILLS WILL TOUCH CLOSE TO ADVISORY CRITERIA (-10 DEG
F) BRIEFLY THIS MORNING OVER SOUTHEAST KS/WEST CENTRAL MO...BUT
THIS WILL BE SHORT LIVED FOR JUST A FEW COUNTIES AT MOST. WILL
CONTINUE TO HIT THIS IN THE HWO.
AS THE UPPER LOW MOVES THROUGH NORTHERN MO TODAY...SHOULD SEE AN
EXTENSIVE LOW LEVEL CLOUD DECK ALREADY WRAPPING AROUND THE UPPER LOW
SHIFT SOUTHEAST INTO MOST OF THE AREA. WILL CONTINUE THE MENTION
OF FLURRIES...AND WOULDN'T BE SHOCKED BY SOME VERY LIGHT
ACCUMULATION IN SPOTS...ESPECIALLY NORTH OF KSGF.
SFC RIDGE WILL EDGE INTO THE WESTERN CWFA LATE TONIGHT AND WED.
HAVE UNDERCUT TEMPERATURE GUIDANCE BY A FEW DEGREES IN MOST
AREAS...ESPECIALLY OVER THE WESTERN CWFA. THE SFC HIGH WILL MOVE
THROUGH THE REGION LATE WED/WED NIGHT. COULDN'T RULE OUT SOME
PATCHY AREAS OF FOG NEAR AREA LAKES WED NIGHT...BUT NOT INCLUDING
ANYTHING IN THE GRIDS ATTM WITH THE OVERALL AIR MASS STILL BEING
QUITE DRY AT THAT TIME.
UPPER LOW NOW OFF THE NORTHERN CA COAST IS EXPECTED TO DIG SSE TO
NORTHERN BAJA BY 18Z WED...THEN INTO CNTRL TX BY 00Z FRI. THE BEST
MOISTURE AND LIFT IS EXPECTED TO STAY SOUTH OF THE REGION WITH
THIS SYSTEM AS IT PASSES THROUGH THE LOWER MS VLY ON FRI. HOWEVER
SOME LIFT IS EXPECTED TO SPREAD EAST INTO THE CWFA AS 850-700MB
FLOW BACKS AND PRODUCES ISENTROPIC UPGLIDE...ALBEIT WITH LIMITED
MOISTURE...AS A NORTHERN STREAM SHORTWAVE APPROACHES FROM THE
NORTHWEST. COULD SEE SOME VERY LIGHT PRECIP AS A RESULT LATE THU-
FRI...BUT NOT ENOUGH TO MENTION MUCH MORE THAN WE HAVE GOING IN
THE GRIDS ATTM. 500MB NORTHWEST FLOW WILL CONTINUE INTO THE
WEEKEND WITH A REINFORCING SHOT OF COLD AIR AND SOME LIGHT
SNOW/FLURRIES POSSIBLE OVER THE WEEKEND WITH A MORE SUBSTANTIAL
DISTURBANCE MOVING THROUGH THE MIDWEST. DSA
AVIATION
MVFR CEILINGS WILL PREVAIL THIS AFTERNOON AS AN UPPER LOW TRACKS
ACROSS MISSOURI. THE VISIBILITY WILL VARY WITHIN AREAS OF FLURRIES AND
LIGHT SNOW. THE VISIBILITY WILL DROP TO AS LOW AS ONE MILE IN THE
HEAVIER SNOW BUT VISIBILITIES WILL GENERALLY BE NEAR 5 MILES.
CLEARING WILL TAKE PLACE THIS EVENING AS THE UPPER LOW TRACKS OFF
TO THE EAST. GUSTY NORTHWEST WINDS UP TO 25 KTS WILL PERSIST THIS
AFTERNOON BEFORE GRADUALLY SUBSIDING THIS EVENING.
FOSTER
SGF WATCHES/WARNINGS/ADVISORIES
MO...NONE.
KS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page