143
FXUS63 KARX 191719
AFDARX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
1219 PM CDT SUN APR 19 2026
KEY MESSAGES
- TEMPERATURES GRADUALLY WARMING THROUGH WEDNESDAY. THE COLDEST
TEMPERATURES WILL BE TONIGHT WITH LOW TEMPERATURES IN THE 20S.
- MAYBE SOME STRONG STORMS ON THURSDAY AFTERNOON AND NIGHT.
- COOLER TEMPERATURES ARE EXPECTED TO END THE WORK WEEK.
DISCUSSION
ISSUED AT 1219 PM CDT SUN APR 19 2026
THIS AFTERNOON THROUGH WEDNESDAY
HIGH PRESSURE WILL GRADUALLY BUILD ACROSS THE AREA THIS
AFTERNOON AND TONIGHT. NORTHWEST WINDS WILL GUST INTO THE 20 TO
30 MPH THIS AFTERNOON AND THEN AS WE GRADUALLY DECOUPLE AND THE
PRESSURE GRADIENT RELAXES, THE WINDS WILL BECOME LIGHT AND
VARIABLE OVERNIGHT. HIGH TEMPERATURES WILL GRADUALLY WARM FROM
THE 40S THIS AFTERNOON INTO MAINLY THE 70S FOR TUESDAY AND
WEDNESDAY. LOW TEMPERATURES WILL WARM FROM THE 20S TONIGHT INTO
THE 30S AND 40S BY TUESDAY NIGHT.
THURSDAY AND THURSDAY NIGHT
A 500 MB TROUGH WILL MOVE INTO THE CENTRAL AND NORTHERN PLAINS.
SOUTHERLY WINDS AHEAD OF THIS SYSTEM WILL BRING LOW LEVEL
MOISTURE TOWARD THE REGION. THERE IS STILL SOME UNCERTAINTY ON
HOW MUCH MOISTURE WILL MOVE INTO THE REGION. AS A RESULT, THE
STORM PREDICTION CENTER KEEPS THEIR 15 PERCENT RISK SOUTH OF THE
AREA. WHILE THAT IS THE CASE, THE MEDIUM-RANGE REAL-TIME AI
CONVECTIVE HAZARDS FORECASTS HAVE THEIR CONVECTIVE RISKS FURTHER
NORTH AND THE PROBABILITIES ARE HIGHER. WE WILL HAVE TO WATCH
HOW THIS EVOLVES OVER THE NEXT SEVERAL DAYS. HIGH TEMPERATURES
ON THURSDAY WILL BE IN THE LOWER AND MID-70S.
FRIDAY INTO SATURDAY
THE WINDS ALOFT WILL BECOME MORE WESTERLY AT THE SURFACE AND
ALOFT IN THE WAKE OF THE THURSDAY NIGHT COLD FRONT. TEMPERATURES
WILL COOL OFF INTO THE 50S AND 60S. WITH COLD AIR AND CYCLONIC
FLOW ALOFT, THERE MAY BE SOME SCATTERED SHOWERS.
AVIATION /18Z TAFS THROUGH 18Z MONDAY/
ISSUED AT 1219 PM CDT SUN APR 19 2026
IN THE WAKE OF A SHORTWAVE TROUGH, NORTHWEST WINDS WILL GUST UP
TO 25 KNOTS THIS AFTERNOON. THE WINDS WILL DECREASE THIS EVENING
AND BECOME LIGHT AND VARIABLE OVERNIGHT. SKIES WILL BE PARTLY
TO MOSTLY SUNNY THIS AFTERNOON AND MOSTLY CLEAR OVERNIGHT.
HYDROLOGY
ISSUED AT 1219 PM CDT SUN APR 19 2026
ALONG THE WISCONSIN RIVER, THE FLOODING HAS ENDED AT CASTLE ROCK
DAM AND MODERATE FLOODING WAS OCCURRING AT MUSCODA. THE MODERATE
FLOODING AT MUSCODA WILL LIKELY CONTINUE INTO TUESDAY AND THEN
FALL BELOW FLOOD STAGE ON THURSDAY.
THE YELLOW RIVER IS PRODUCING MINOR FLOODING AT NECEDAH. THIS
SHOULD CONTINUE UNTIL THURSDAY.
THERE IS STILL A FLOOD WATCH FOR THE MISSISSIPPI RIVER AT
MCGREGOR. THE RIVER MAY BRIEFLY REACH THE 16 FOOT FLOOD STAGE ON
TUESDAY.
WITH DRY WEATHER EXPECTED INTO WEDNESDAY, WE WILL CONTINUE TO
SEE RIVER LEVELS TO CONTINUE TO FALL ACROSS THE UPPER
MISSISSIPPI RIVER VALLEY.
ARX WATCHES/WARNINGS/ADVISORIES
WI...NONE.
MN...NONE.
IA...NONE.
DISCUSSION...BOYNE
AVIATION...BOYNE
HYDROLOGY...BOYNE
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