955
FXUS63 KARX 181639
AFDARX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
1139 AM CDT SUN OCT 18 2026
KEY MESSAGES
- MAINLY DRY AND UNSEASONABLY WARM INTO NEXT WEEKEND.
DISCUSSION
ISSUED AT 1139 AM CDT SUN OCT 18 2026
TONIGHT
WITH THE LOSS OF DIURNAL HEATING AND THE SURFACE PRESSURE
GRADIENT DECREASING, THE WINDS WILL QUICKLY SUBSIDE TONIGHT.
WITH LIGHT WINDS AND DRY DEW POINTS, TEMPERATURES QUICKLY COOL
OVERNIGHT. THE NBM LOOKED TO BE A BIT TOO WARM, SO DID A 50-50
BLEND OF THE NBM AND THE NBM 10TH PERCENTILE. THIS LOWERED
TEMPERATURES UP TO 5F. THE LARGEST DROP WAS IN CENTRAL AND
NORTH-CENTRAL WISCONSIN. LOW TEMPERATURES TONIGHT WILL RANGE
FROM THE LOWER 30S TO MID-40S.
MONDAY - FRIDAY
A 500 MB RIDGE WILL GRADUALLY BUILD NORTH INTO THE REGION EARLY
THIS WEEK AND THEN KEEP THE AREA DRY THROUGH FRIDAY. HIGH
TEMPERATURES WILL BE MAINLY IN THE 60S THROUGH WEDNESDAY AND
THEN RANGE FROM THE UPPER 60S TO MID-70S FOR THE REMAINDER OF
THE WEEK. LOW TEMPERATURES WILL RANGE FROM THE MID-30S TO
MID-40S ON MONDAY AND TUESDAY NIGHTS, AND IN THE 40S AND 50S FOR
THE REMAINDER OF THE WEEK.
NEXT WEEKEND
A NEGATIVELY-TILTED NORTHERN STREAM SHORTWAVE WILL LIFT
NORTHEAST FROM THE CENTRAL AND NORTHERN PLAINS INTO ONTARIO. IN
ITS WAKE, THE UPPER-LEVEL RIDGE WILL BUILD BACK ACROSS THE
AREA. THIS TROUGH WILL PROVIDE A CHANCE OF RAIN FROM SATURDAY
AFTERNOON INTO SUNDAY MORNING. WITH DRY AIR ACROSS THE REGION,
THE RAIN AMOUNTS WILL BE ON LIGHT SIDE (GENERALLY LESS THAN A
TRACE). HIGH TEMPERATURES WILL BE IN THE 60S AND LOWER 70S. LOW
TEMPERATURES WILL RANGE FROM THE UPPER 40S TO MID-50S.
AVIATION /18Z TAFS THROUGH 18Z MONDAY/
ISSUED AT 1139 AM CDT SUN OCT 18 2026
SOUTH WINDS WILL RANGE FROM 10 TO 20 KNOTS WITH GUST OF 20 TO 30
KNOTS THIS AFTERNOON. AS THE PRESSURE GRADIENT SLACKENS AND
MIXING ALOFT DECREASES, THE SOUTHERLY WINDS WILL DROP BELOW 10
KNOTS. THESE LIGHTER WINDS WILL THEN CONTINUE INTO MONDAY.
SKIES WILL BE MAINLY CLEAR THROUGH THE PERIOD.
ARX WATCHES/WARNINGS/ADVISORIES
WI...NONE.
MN...NONE.
IA...NONE.
DISCUSSION...BOYNE
AVIATION...BOYNE
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