729
FXUS64 KTSA 190434
AFDTSA
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1134 PM CDT MON MAR 18 2019
AVIATION
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
VFR CONDITIONS ARE EXPECTED THROUGH THE MAJORITY OF THE FORECAST
PERIOD WITH LIGHT WINDS OVERNIGHT. GUSTY SOUTHWEST WINDS WILL
DEVELOP ACROSS NORTHEAST OKLAHOMA BY MID DAY TUESDAY IN ADVANCE OF
AN APPROACHING COLD FRONT. MODELS A LITTLE SLOWER WITH FROPA/RAIN
CHANCES, WHICH WILL PRIMARILY IMPACT KBVO LATE TUESDAY EVENING.
PREV DISCUSSION
/ISSUED 914 PM CDT MON MAR 18 2019/
.UPDATE
DISCUSSION...
SURFACE HIGH PRESSURE...CENTERED OVER THE OHIO RIVER
VALLEY...CONTINUED TO SHIFT EAST-SOUTHEAST THROUGH THE PLAINS THIS
EVENING. IN RESPONSE...MOSTLY CLEAR CONDITIONS WITH EASTERLY WINDS
WERE OBSERVED OVER NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS.
ACROSS SOUTHEAST OKLAHOMA...A WEAK SURFACE BOUNDARY REMAINED WITH
LIGHT WINDS VARYING BETWEEN EAST AND SOUTH.
OVERNIGHT TONIGHT...SURFACE HIGH PRESSURE IS FORECAST TO CONTINUE
ITS EASTWARD MOVEMENT WHILE THE SURFACE BOUNDARY BEGINS LOSE
DEFINITION. THUS...WITH THE CWA MORE ON THE BACKSIDE OF HIGH
PRESSURE...WINDS SHOULD BECOME MORE SOUTHERLY ACROSS THE CWA. THE
EXCEPTION WILL BE THE NORMAL EASTERLY WINDS WITHIN THE ARKANSAS
RIVER VALLEY OF WESTERN ARKANSAS. WITHIN THE MORE SOUTHERLY
FLOW...LOW LEVEL MOISTURE LOOKS TO BEGIN SLOWLY LIFTING BACK
NORTHWARD AHEAD OF THE COLD FRONT FORECAST TO PUSH INTO THE REGION
TUESDAY NIGHT/WEDNESDAY. THESE CONDITIONS WILL HELP TO KEEP
OVERNIGHT LOWS SLIGHTLY WARMER TONIGHT COMPARED TO LAST
NIGHT...WITH FORECAST LOWS OF MID 30S TO LOWER 40S POSSIBLE.
FOR THE EVENING UPDATE...OVERALL FORECAST LOOKS TO HAVE A GOOD
HANDLE ON THE MENTIONED ABOVE. HAVE ONLY ADDED SOME MINOR TWEAKS
TO HOURLY TEMP/DEWPOINT/WIND GRIDS TO ACCOUNT FOR LATEST TRENDS
AND OBSERVATIONS.
TSA WATCHES/WARNINGS/ADVISORIES
OK...NONE.
AR...NONE.
AVIATION.....12
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