308
FXUS63 KARX 091039
AFDARX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LA CROSSE WI
539 AM CDT THU JUL 9 2026
KEY MESSAGES
- SCATTERED SHOWERS AND STORM ARE POSSIBLE THIS AFTERNOON,
MAINLY EAST OF THE MISSISSIPPI RIVER.
- COOLER WEATHER TO END THE WEEK WITH HIGHS STAYING IN THE UPPER
70S TO MID 80S. WARMER WEATHER RETURNS THIS WEEKEND AND
CONTINUES NEXT WEEK AS HIGHS GET IN THE UPPER 80S TO LOW 90S.
DISCUSSION
ISSUED AT 1158 PM CDT WED JUL 8 2026
TODAY: FOG EARLY THIS MORNING, SCATTERED SHOWERS AND STORMS THIS
AFTERNOON
WITH THE RAIN THAT FELL AND THE SUBSIDENCE BEHIND THE FRONT THAT
MOVED THROUGH, FOGGY CONDITIONS MAY OCCUR EARLY THIS MORNING. IF
SKIES CLEAR OUT A LITTLE MORE THEN THEIR COULD ALSO BE LOCALIZED
AREAS OF DENSE FOG IN SOME LOCATIONS. NORTHWEST FLOW ALOFT ALONG
WITH SOUNDINGS SUGGESTING AROUND 1500 TO 2000 J/KG OF MUCAPE WILL
SUPPORT SCATTERED SHOWERS AND STORMS THIS AFTERNOON. WITH WEAK SHEAR
IN PLACE FOR THIS AFTERNOON, THESE STORMS WILL STRUGGLE TO GET
GOING. EAST OF THE MISSISSIPPI RIVER HAS THE BEST CHANCE AT SEEING A
SHOWER OR STORM. THE MAIN THREAT WITH THESE STORMS THAT CAN GET
GOING AND STAY ORGANIZED A FOR A PERIOD OF TIME WOULD BE VERY
LOCALIZED RAINFALL AMOUNTS OF 0.5 TO 1.5" DUE TO SLOWER STORM MOTION.
FRIDAY-NEXT WEEK: COOLER END TO THE WEEK WITH WARMER AND DRIER
CONDITIONS NEXT WEEK
BEGINNING ON FRIDAY, A RIDGE BUILDS INTO THE UPPER MIDWEST. THIS
WILL LIMIT ANY RAINFALL CHANCES FOR MUCH OF NEXT WEEK. TEMPERATURES
GET INTO THE UPPER 80S TO LOW 90S ACROSS THE CWA WITH THE WARMEST
TEMPERATURES WEST OF THE MISSISSIPPI RIVER. AT THE SURFACE THE
REGION WILL BE JUST TO THE EAST OF THE HIGH PRESSURE CENTER WHICH
COULD TEMPER OUR TEMPERATURES COMPARED TO THE HIGH PLAINS WHERE THEY
WILL BE IN GOOD SOUTHERLY FLOW AND WEST OF THE HIGH PRESSURE CENTER.
CONFIDENCE IS HIGH ON THE RIDGE STAYING OVERHEAD THROUGH MIDWEEK.
AFTERWARDS IS WHERE THE UNCERTAINTY BEGINS. ENSEMBLES AND
DETERMINISTIC GUIDANCE SHOW THE RIDGE BREAKING DOWN AT SOME POINT
AND BRINGING THE STORM PATH MORE IN LINE WITH THE UPPER MIDWEST,
HOWEVER THE MAIN DIFFERENCE IS WHEN THIS OCCURS. THE LONGER THE
RIDGE STAYS AMPLIFIED AND OVER OUR AREA, THE LESS LIKELY WE SEE
CONVECTION IN OUR REGION.
AVIATION /12Z TAFS THROUGH 12Z FRIDAY/
ISSUED AT 539 AM CDT THU JUL 9 2026
MVFR TO LIFR STRATUS WITH SOME FOG IN SOUTHEAST MN WILL BEGIN TO
LIFT THIS MORNING DUE TO DIURNAL MIXING, RESULTING IN VFR CONDITIONS
BY AFTERNOON. 1/4SM HAS BEEN OBSERVED AT KRST THIS MORNING AND THUS
HAVE OPTED TO KEEP A TEMPO FOR 1/4SM UNTIL FOG BEGINS TO LIFT. THERE
REMAINS A VERY LOW CHANCE (10% CHANCE) FOR A PASSING SHOWER OR STORM
AT KLSE TODAY, BUT GIVEN THE LOW PROBABILITY OF THIS HAVE NOT OPTED
TO INCLUDE IT IN THE TAF. WINDS WILL REMAIN PREDOMINATELY FROM
THE NORTH TODAY AT AROUND 5 KTS BEFORE BECOMING LIGHT AND
VARIABLE OVERNIGHT. VALLEY FOG ALONG THE MISSISSIPPI RIVER,
INCLUDING AT KLSE, MAY BE POSSIBLE TOWARDS DAYBREAK ON FRIDAY
GIVEN THE FAIRLY DEEP LIGHT WIND LAYER IN THE RAP AND HIGH
PRESSURE ATTEMPTING TO BUILD INTO THE REGION ALLOWING FOR
CLEARING SKIES.
HYDROLOGY
ISSUED AT 1158 PM CDT WED JUL 8 2026
AFTER A SWATH OF 3 TO 5" FELL IN PORTIONS OF SOUTHEAST
MINNESOTA AND NORTHEAST IOWA AND A MORE LOCALIZED AREA OF 5 TO 7"
ACROSS SOUTHERN MOWER COUNTY, THE CEDAR RIVER IS PRONGED TO BE ABOVE
FLOOD STAGE OVER THE NEXT FEW DAYS AS THE RUNOFF FILLS INTO THE
RIVER. LITTLE TO NO MORE RAIN IS EXPECTED OVER THE NEXT FEW DAYS.
THE LONE EXCEPTION IS THIS AFTERNOON AS SCATTERED SHOWERS AND STORMS
ARE POSSIBLE. THERE IS A LOCALIZED POSSIBILITY OF 0.5 TO 1.5"
OCCURRING WHERE A STORM OCCURS. EAST OF THE MISSISSIPPI RIVER HAS
THE BEST CHANCE AT SEEING A SHOWER OR STORM. GIVEN THE SLOW STORM
MOTIONS, THESE STORMS COULD LINGER OVER A GIVEN LOCATION.
ARX WATCHES/WARNINGS/ADVISORIES
WI...NONE.
MN...NONE.
IA...NONE.
DISCUSSION...CECAVA
AVIATION...NAYLOR
HYDROLOGY...CECAVA
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