703
FXUS63 KOAX 270507
AFDOAX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1207 AM CDT SAT JUN 27 2026
KEY MESSAGES
- MILD WEATHER CONTINUES THROUGH SATURDAY, WITH A STRONG TO
SEVERE STORM POSSIBLE SATURDAY EVENING, PRIMARILY ACROSS
NORTHEAST NEBRASKA.
- HEAT BUILDS THIS WEEKEND, WITH THE HOTTEST CONDITIONS
EXPECTED SUNDAY AND MONDAY. HEAT INDEX VALUES MAY REACH 105 TO
110 DEGREES.
- HOT AND HUMID CONDITIONS ARE EXPECTED TO PERSIST INTO NEXT
WEEK, WITH PERIODIC EVENING AND OVERNIGHT THUNDERSTORM
CHANCES.
UPDATE
ISSUED AT 1207 AM CDT SAT JUN 26 2026
EXTREME HEAT WATCHES AND HEAT ADVISORIES HAVE BEEN ISSUED
THROUGH TUESDAY DUE TO THE EXPECTED EXTREME, PERSISTENT HEAT
FORECAST TO IMPACT THE AREA.
DISCUSSION
ISSUED AT 1100 PM CDT FRI JUN 26 2026
HIGH TEMPERATURES TODAY GENERALLY PEAKED NEAR 80F WITH MUCH
COOLER CONDITIONS WHERE KANSAS/NEBRASKA/MISSOURI MEET. FALLS
CITY AND ITS NEIGHBORS ONLY PEAKED IN THE LOWER 70S UNDER
PERSISTENT OVERCAST SKIES THAT HUNG AT ABOUT 1200 FT AGL.
CURRENT WV IMAGERY REVEALS MOSTLY ZONAL FLOW OVER THE CENTRAL
CONUS WITH A NEGATIVELY TILTED TROF PUSHING ONTO THE WEST COAST.
A STATIONARY FRONT HUNG UP ACROSS EASTERN KANSAS TRAILING BACK
TO THE FRONT RANGE IS THE FOCUS FOR TONIGHT'S REGIONAL
CONVECTION. OUR AREA WILL REMAIN DRY FOR THE NIGHT. IT'S A
BEAUTIFUL ONE.
HAVE INTRODUCED FOG INTO THE FORECAST FOR TONIGHT WITH BEST
CHANCES OF IMPACTFUL VISIBILITY RESTRICTIONS BEING WEST OF THE
MISSOURI RIVER. ALREADY VISIBILITY OBSERVATIONS IN NORTHEAST KS
AND NW MISSOURI ARE QUICKLY SLIPPING. EXPECT THE FOG AND LOW
CLOUDS TO PUSH IN FROM THE SOUTHEAST.
HREF AND NBM PROBABILITIES CURRENTLY PLACE ODDS AT DIPPING
BELOW 5 MILES OF VISIBILITY AT 20-60% FOR AREAS WEST OF A LINE
FROM NORFOLK TO LINCOLN. I THINK CHANCES ARE MUCH BETTER THAN
THAT. THE PRIMARY FLY IN THE OINTMENT WILL BE THE WINDS WHICH
WILL REMAIN BLOWING AT 5-10 MPH OUT OF THE SOUTHEAST OVERNIGHT.
STILL, CONFIDENCE IN FOG DEVELOPMENT IS HIGH. I'VE GOT OMAHA
AND LINCOLN'S VISIBILITY DIPPING TO 3-4 MILES AND BELOW TWO
MILES IN THE NORFOLK AREA AND COUNTIES ON THE WESTERN PERIPHERY
OF THE CWA.
SATURDAY
MID-LEVEL RIDGING IS ANTICIPATED AHEAD OF THE WESTERN TROFING,
ALLOWING HEIGHTS TO RISE. HOWEVER, THE FOG MAY BE SLOW TO LIFT
AS OVERCAST SKIES ARE ANTICIPATED TO LINGER THROUGH AT LEAST THE
FIRST HALF OF SATURDAY. THANKS TO THE CLOUD COVER, HIGH
TEMPERATURES WILL BE STUNTED. DESPITE THE FAMILIAR TEMPERATURES,
IT WILL FEEL STICKIER AS DEWPOINTS WILL BE ABOUT 10F HIGHER.
WINDS WILL REMAIN OUT OF THE SOUTHEAST, QUICKER AT SUSTAINED
SPEEDS OF 10-20 KNOTS.
HIGHS WILL PEAK NEAR NORMAL ONLY ONE AFTERNOON OF THIS FORECAST
AND IT'S DAY 1. TAKE ADVANTAGE IF YOU'VE GOT OUTDOOR EXERTION
AHEAD OF YOU.
A POTENT SHORTWAVE WORKS OVER THE PERU, NE / CLARINDA, IA AREA
IN THE AFTERNOON / EARLY EVENING. HAVE BUMPED UP POPS TO 20%
EARLIER IN THE DAY TO CORRESPOND. EXPECT GRAY SKIES TO BE A
SAFER BET.
BETTER PRECIP CHANCES WAIT FOR AFTER MIDNIGHT SATURDAY NIGHT /
EARLY SUNDAY MORNING AS THE STATIONARY FRONT SOUTH OF HERE
PUSHES NORTH AS A WARM FRONT. A NOCTURNAL LLJ SHOULD HELP KICK
SOME CONVECTION ALONG THE FRONT (POPS OF 30-40% NORTHEAST). A
SEVERE RISK IS POSSIBLE WITH ALL SEVERE MODES POSSIBLE AS SFC
BASED SUPERCELLS ARE POSSIBLE. SOME GUIDANCE SUGGESTS CAPPING
WON'T BE OVERCOME. COUNT ME IN ON TEAM THUNDER. THE MARGINAL
CONVECTIVE OUTLOOK IS BASED ON THIS CONDITIONAL THREAT.
SUNDAY AND MONDAY
THE PATTERN BECOMES MORE AMPLIFIED OVER THE COURSE OF SUNDAY
LEAVING SOUTHWEST FLOW STRETCHING FROM BAJA, CA THROUGH FARGO,
ND.
SKIES CLEAR FROM SOUTH TO NORTH EARLY SUNDAY MORNING AS THE WARM
FRONT CONTINUES NORTHEAST. UNDER THE SUNSHINE AND QUICK
SOUTHERLY SFC FLOW, TEMPS WILL RACE INTO THE 90S WITH DEWPOINTS
PEAKING BETWEEN 68 AND 78F. THIS WILL ALLOW HEAT INDICES TO
PUSH INTO THE TRIPLE DIGITS FOR MOST LOCATIONS. IF THE CURRENT
FORECAST HOLDS, 105-110 HEAT INDICES WOULD BE MET OVER THE
EASTERN 2/3 OF THE CWA (HEAT ADVISORY CRITERIA).
A SFC LOW TRACKS THROUGH THE DAKOTAS, LEAVING THEM WITH
SIGNIFICANT POPS, BUT IOWA AND NEBRASKA WILL REMAIN DRY.
MONDAY'S FORECAST IS VERY SIMILAR WITH HEAT INDICES NEARLY
IDENTICAL AND CONTINUED QUICK SOUTHERLY WINDS, BUT WITH THE
DANGEROUS HEAT EXPANDING FARTHER INTO IOWA WHERE CORN SWEAT
PUSHES DEWPOINTS CLOSE TO 80F AT TIMES.
RAIN AND STORM CHANCES RETURN (30-60%) TO THE FORECAST MONDAY
NIGHT WHEN A COLD FRONT SETTLES SOUTH ACROSS CENTRAL NEBRASKA.
WE'RE NOT YET OUTLOOKED BY THE SPC AND SHEAR LOOKS SUB- PAR, BUT
MACHINE- LEARNING FORECASTS DO HIGHLIGHT AN OPPORTUNITY FOR
SEVERE WEATHER.
BEYOND
TUESDAY'S COLD FRONT DOESN'T PACK A COLD PUNCH. WE'D SETTLE FOR
A "LESS HOT" PUNCH, BUT THE FRONT ACTUALLY LIFTS BACK NORTH AND
TEMPERATURES REMAIN TOASTY THROUGH THE WORK WEEK. EXPECT 90S TO
LINGER. THE EXTENDED NATURE OF THE HEAT IS CONCERNING. WITH
OVERNIGHT MINIMUM HEAT INDICES REMAINING IN THE MID-70S,
ROOMS/BUILDINGS WITH NO A/C WILL BE VERY DIFFICULT TO KEEP COOL.
HEAT'S IMPACTS GROW OVER THE COURSE OF CONSECUTIVE DAYS.
PATTERN RECOGNITION SUGGESTS THAT THE AREA MAY BE SUBJECTED TO
OVERNIGHT MCS PASSAGES AS THE NOCTURNAL LLJ FEEDS HUMIDITY AND
INSTABILITY INTO THE AREA. SHOULD THIS MATERIALIZE ONCE OR
TWICE, SEVERE WEATHER IS POSSIBLE (ESPECIALLY WINDS), BUT
TEMPERATURE FORECASTS ARE SUBJECT TO BUST AS REMNANT CLOUD COVER
OR COLD POOLS HAVE BEEN KNOWN TO THROW A COOLING WRENCH INTO
SUMMER PLANS.
AVIATION /06Z TAFS THROUGH 06Z SUNDAY/
ISSUED AT 1207 AM CDT SAT JUN 26 2026
LOW CLOUDS ARE STARTING TO SPREAD ACROSS EASTERN NEBRASKA AND
WESTERN IOWA, WITH IFR/LIFR CONDITIONS EXPECTED TO DEVELOP AT
THE TERMINALS OVERNIGHT. LOW CLOUDS WILL HOLD INTO THE MORNING
ON SATURDAY WITH WINDS INCREASING OUT OF THE SOUTHEAST, GUSTING
TO 25KT. EXPECT CIGS TO SLOWLY LIFT THROUGH THE MORNING INTO THE
AFTERNOON WITH VFR CONDITIONS LIKELY STARTING AROUND 18Z AT KOFK
AND CLOSER TO 20-21Z AT KOMA AND KLNK. MAY SEE LOW CLOUDS RETURN
TO AT LEAST NORTHEAST NEBRASKA AND KOFK SATURDAY NIGHT.
OAX WATCHES/WARNINGS/ADVISORIES
NE...HEAT ADVISORY FROM 1 PM SUNDAY TO 9 PM CDT TUESDAY FOR NEZ015-
034-044-045-050-051-065>068-078-088>093.
EXTREME HEAT WATCH FROM SUNDAY AFTERNOON THROUGH TUESDAY
EVENING FOR NEZ052-053.
HEAT ADVISORY FROM 1 PM TO 9 PM CDT SUNDAY FOR NEZ011-012.
IA...HEAT ADVISORY FROM 1 PM SUNDAY TO 9 PM CDT TUESDAY FOR IAZ043-
055-056.
EXTREME HEAT WATCH FROM SUNDAY AFTERNOON THROUGH TUESDAY
EVENING FOR IAZ069-079-080-090-091.
UPDATE...MCCOY
DISCUSSION...NICOLAISEN
AVIATION...MCCOY
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