Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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000
FXUS63 KOAX 281735
AFDOAX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1235 PM CDT TUE JUL 28 2015

.SHORT TERM...(TODAY THROUGH THURSDAY)
ISSUED AT 245 AM CDT TUE JUL 28 2015

LINE OF CONVECTION EXTENDED FROM EASTERN SOUTH DAKOTA INTO NORTH
CENTRAL NEBRASKA AT 07Z WITH ADDITIONAL DEVELOPMENT STARTING ALONG
THE NORTHWEST IOWA BORDER. COLD FRONT LAGGED THE CONVECTION
EXTENDING FROM CENTRAL SOUTH DAKOTA INTO WESTERN NEBRASKA.

MAIN QUESTION FOR NOW IS HOW LONG THIS COMPLEX HOLDS TOGETHER AS
IT MOVES INTO AREA OF WEAKER INSTABILITY ACROSS EASTERN NEBRASKA.
EXPECT SOME CHANCE OF THUNDERSTORMS IN ADVANCE OF THE FRONT TODAY
ALTHOUGH BECOMING MORE ISOLATED THROUGH THE MORNING AS LOW LEVEL
FLOW WEAKENS AND BECOMES SOUTHWESTERLY...BEFORE INCREASING IN
COVERAGE AGAIN IN THE AFTERNOON. LATEST RAP MOVES FRONT INTO
NORTHEAST NEBRASKA AROUND 13Z THEN REACHES FAR SOUTHEAST PART OF
THE CWA BY 23Z. RAIN COULD JUMP PARTS OF THE AREA TODAY BEFORE THE
CHANCE INCREASES AGAIN LATER THIS AFTERNOON AND TONIGHT EAST AND
SOUTH OF THE AREA WHERE BETTER INSTABILITY IN PLACE.

HOT AND HUMID TODAY IN SOUTHEAST AREAS WHERE FRONT COMES THROUGH
LATE IN THE AFTERNOON OR EARLY EVENING. COOLER AND LESS HUMID AIR
BEHIND THE FRONT TONIGHT AND WEDNESDAY BEFORE A RETURN TO WARMER
TEMPS ON THURSDAY AS SOUTHERLY FLOW RETURNS.

.LONG TERM...(THURSDAY NIGHT THROUGH MONDAY)
ISSUED AT 245 AM CDT TUE JUL 28 2015

EXTENDED MODELS CONTINUE TO HOLD UPPER HIGH CENTER OVER THE
SOUTHWEST CONUS DURING THE PERIOD WITH SOME DIFFERENCE IN
AMPLITUDE OF THE PATTERN. GFS INDICATES MORE AMPLITUDE IN ITS
SOLUTION WITH EURO SHOWING A FLATTER FLOW ACROSS THE TOP OF THE
RIDGE. LATEST GUIDANCE SUGGESTS SEASONAL TEMPERATURES THROUGH THE
WEEKEND THEN SOMEWHAT COOLER FOR EARLY NEXT WEEK. BEST CHANCE OF
PRECIP COMES AROUND SUNDAY WHEN NEXT FRONT MOVES INTO THE AREA
WITH GFS SHOWING STRONGER COOLING WITH ITS MORE AMPLIFIED FLOW.

&&

.AVIATION...(18Z TAFS FOR KOFK...KLNK AND KOMA.)
ISSUED AT 1232 PM CDT TUE JUL 28 2015

COLD FRONT IS BRINGING A WIND SHIFT TO THE TAF SITES...AS WELL AS
A CHANCE OF SHOWERS/STORMS AT KOMA/KLNK THIS AFTERNOON. FRONT IS
THROUGH KOFK...WITH NORTHWEST WINDS THAT WILL SLACKEN TONIGHT.
SHOWERS/STORMS SHOULD MOVE/EXPAND INTO THE VICINITY OF KOMA AND
KLNK LATER THIS AFTERNOON. STILL A LITTLE LOW ON CONFIDENCE OF
COVERAGE...BUT TOOK A BEST SHOT OF WHEN SHOWERS/STORMS WOULD
AFFECT EACH SITE. AS THE FRONT MOVES THROUGH...WINDS WILL TURN TO
NORTHWEST AT KOMA/KLNK AND CHANCE OF SHOWERS/STORMS WILL SHIFT TO
THE SOUTH AND AWAY FROM TAF SITES...LEAVING VFR CONDITIONS FOR THE
REST OF THE TAF CYCLE.

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
IA...NONE.
&&

$$

SHORT TERM...FOBERT
LONG TERM...FOBERT
AVIATION...MAYES



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