077
FXUS63 KARX 281730
AFDARX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
1230 PM CDT THU MAY 28 2026
KEY MESSAGES
- DRY AND SEASONABLY WARM CONDITIONS THROUGH EARLY NEXT WEEK
WITH HIGHS MAINLY IN THE 80S AND LOWS IN THE 50S.
DISCUSSION
ISSUED AT 1230 PM CDT THU MAY 28 2026
REST OF THE WEEK: WARM AND DRY
A DEVELOPING OMEGA BLOCK ACROSS THE CENTRAL CONUS WILL RESULT
IN DRY CONDITIONS FOR THE REMAINDER OF THE WEEK. SURFACE HIGH
PRESSURE ANCHORS OVER THE GREAT LAKES IN RESPONSE TO THIS RIDGE,
RESULTING IN DRIER CONTINENTAL AIR EMANATING EASTWARD FROM THIS
CELL. AS A RESULT, DEWPOINTS THROUGH THE END OF THE WEEK LOOK
TO BE QUITE PLEASANT IN THE 40S AND 50S. DEEPER MIXING OWING TO
THIS DRIER AIRMASS SHOULD RESULT IN HIGHS REACHING INTO THE 80S
FOR MOST LOCALES THROUGH THE WEEKEND. DID NUDGE HIGHS DOWN
SLIGHTLY FOR TOMORROW BELOW THE DETERMINISTIC NBM GIVEN THE
COOLING 900-700-MB LAYER (MAYBE TOO MUCH INFLUENCE FROM THE BC
MODELS?), BUT OTHERWISE MINIMAL CHANGES WERE MADE TO THE
FORECAST.
EARLY NEXT WEEK: LOW RAIN CHANCES, STILL WARM
A NEGATIVELY-TILTED SHORTWAVE TROUGH IMPEDES ALONG THE WESTERN
FLANK OF THE OMEGA BLOCK FOR SUNDAY WITH THE RIDGE GRADUALLY
DEVOLVING THROUGH THE FIRST HALF OF THE WEEK AND TRANSITIONING
TO MORE SOUTHWESTERLY FLOW FOR THE UPPER MIDWEST. SEVERAL
PERTURBATIONS WORKING THROUGH THIS FLOW COULD BRING SHOWERS AND
STORMS FOR THE FIRST HALF OF THE WEEK, BUT THE OVERALL PATTERN
DOESN'T BECOME MORE FAVORABLE FOR WIDESPREAD SHOWERS UNTIL THE
LATTER PART OF NEXT WEEK. LITTLE CHANGE IN THE LOWER
TROPOSPHERIC AIRMASS ENSURES THAT HIGHS WILL RESIDE IN THE 80S
AND LOWS IN THE 50S THROUGH THE FORECAST PERIOD.
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
ISSUED AT 1230 PM CDT THU MAY 28 2026
VFR CONDITIONS ARE FORECAST FOR THE PERIOD WITH LIGHT EAST TO
SOUTHEAST WINDS AROUND OR LESS THAN 5 KTS EAST OF THE
MISSISSIPPI RIVER AND 5-10 KTS TO THE WEST OF THE RIVER.
ARX WATCHES/WARNINGS/ADVISORIES
WI...NONE.
MN...NONE.
IA...NONE.
DISCUSSION...SKOW
AVIATION...SKOW
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