593  
FXUS63 KMPX 181826  
AFDMPX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN  
126 PM CDT MON AUG 18 2025  
   
KEY MESSAGES  
 
- ADDITIONAL SHOWERS AND STORMS WILL LEAD TO A CHANCE FOR  
ADDITIONAL FLOODING AND FLASH FLOODING THROUGH THIS MORNING.  
THE TWIN CITIES METRO COULD BE IMPACT DURING THE MORNING  
COMMUTE.  
 
- BEHIND THE COLD FRONT MOVING THROUGH TODAY, CONDITIONS LOOK TO  
DRY OUT AND COOL DOWN THIS WEEK.  
 
 
   
DISCUSSION  
 
ISSUED AT 243 AM CDT MON AUG 18 2025  
 
RADAR IS QUITE ACTIVE THIS MORNING WITH CLUSTERS OF STORMS PRESENT  
ACROSS MUCH OF THE AREA, ALTHOUGH A LACK OF SEVERE STORMS IS  
EXPECTED TO REMAIN THE TREND. HEAVY RAIN AND LIGHTNING WILL REMAIN  
THE PRIMARY RISKS WITH ADDITIONAL STORMS THROUGH THE REST OF THIS  
MORNING IN ADDITION TO AN ISOLATED WIND GUST OR TWO, WITH THE BEST  
POTENTIAL FOR GUSTS GENERALLY IN SOUTHWESTERN MINNESOTA. THE FLOOD  
WATCH REMAINS OVER THE ENTIRE AREA AS THERE IS STILL A SIGNIFICANT  
AMOUNT OF MOISTURE WITHIN THE ATMOSPHERE AND A COMBINATION OF THE  
FORCING FROM THE INCOMING COLD FRONT ALONGSIDE INSTABILITY FOR  
STORMS WILL KEEP THE AREA ACTIVE THROUGH AT LEAST MIDDAY TODAY. THE  
HARDEST HIT AREAS OVER THE LAST 12 TO 24 HOURS WILL BE VERY  
SUSCEPTIBLE TO FURTHER RAINFALL SUCH THAT FLOODING AND FLASH  
FLOODING COULD OCCUR WITH AS LITTLE AS 1 TO 2 INCHES OF RAIN OVER 3-  
6 HOURS AND WILL BE SOMETHING WE HAVE TO MONITOR CLOSELY OVER THE  
COMING HOURS. PWATS CONTINUE TO EXCEED 1.8-2 INCHES AS EFFICIENT  
850MB MOISTURE TRANSPORT IS EVIDENT PER SPC MESOANALYSIS DUE TO THE  
LOW LEVEL JET PRESENT WITHIN THE WARM SECTOR AHEAD OF THE COLD FRONT  
AND SOUTH OF THE WARM FRONT. THE SURFACE LOW IS STILL EXPECTED TO  
MIGRATE NORTHWARDS WHICH PLACES MOST OF THE MPX CWA WITHIN THE LOW  
LEVEL JET'S INFLUENCE, WHICH WILL ALLOW FOR EFFICIENT RAINFALL  
PRODUCTION AND HEAVY RAINFALL WITH ADDITIONAL STORMS. WE LIKELY WILL  
HAVE TO ISSUE ADDITIONAL FLASH FLOOD WARNINGS SHOULD WE SEE STORMS  
MOVING INTO AREAS ALREADY HIT DUE TO HOW SATURATED THE GROUND  
ALREADY IS, FAVORING AREAS OF SOUTHERN MN TO WESTERN WI. THANKFULLY  
WE HAVE HAD JUST ENOUGH OF A LULL FROM ROUGHLY 11PM TO 3AM TO  
RECOVER ENOUGH SUCH THAT WATER HAS RECEDED FROM MOST OF THE  
AFTERNOON/EVENING AREAS WITH THE MAIN EXCEPTION BEING WASECA COUNTY  
WHICH SAW SIGNIFICANT RAINS ALREADY YESTERDAY MORNING IN ADDITION TO  
THE AFTERNOON. SHORT RANGE GUIDANCE CONTINUES TO SHOW A LINE OF  
SHOWERS AND STORMS ALONG THE COLD FRONT PROGRESSING ACROSS THE  
REGION THIS MORNING, ARRIVING IN WESTERN MN SHORTLY AFTER THIS  
DISCUSSION GOES OUT AND REACHING THE TWIN CITIES METRO BY THE LATTER  
HALF OF THE MORNING COMMUTE HOURS AND WESTERN WI BY THE LATE MORNING.  
 
ACTIVITY WILL CONTINUE ALONG THE COLD FRONT AS IT PUSHES THROUGH  
THIS MORNING, WITH A SIGNIFICANT PATTERN SHIFT BEHIND THE FRONT  
THROUGH THE REST OF THIS WEEK AND INTO THE WEEKEND WITH TEMPERATURES  
DROPPING BACK TO UPPER 70S TO LOW 80S CLOSE TO NORMAL FOR LATE  
AUGUST AS WELL AS DRY CONDITIONS. SURFACE HIGH PRESSURE WILL BUILD  
BENEATH AN INCOMING RIDGE BEHIND THE DEPARTING COLD FRONT THROUGH AT  
LEAST FRIDAY AT WHICH POINT A HUDSON BAY LOW BEING PICKED UP WITHIN  
MOST OF THE GLOBAL GUIDANCE WILL DRAG A WEAK COLD FRONT ACROSS THE  
REGION WHICH WOULD GIVE MINOR CHANCES FOR RAIN, WITH SURFACE HIGH  
PRESSURE AND SUBSIDENCE RETURNING AFTERWARDS. AFTER THE ACTIVE LAST  
FEW WEEKS AS FAR AS SHOWERS AND STORMS GO, IT WILL BE NICE TO HAVE A  
BREAK AS WE BEGIN TO DEAL WITH SWOLLEN RIVERS AND RIVER FLOODING DUE  
TO THE RAINFALL OVER THE LAST FEW DAYS. THE LONGER RANGE GEFS/EPS  
BOTH SHOW RELATIVELY DRY WEATHER CONTINUING UNTIL LATER NEXT WEEK,  
WITH SPORADIC PRECIPITATION BEYOND THE 28TH OR 29TH WITH A LACK OF A  
DOMINANT WEATHER PATTERN IN THE LONGER TIME RANGES LEADING TO  
UNCERTAINTY.  
 
 
   
AVIATION /18Z TAFS THROUGH 18Z TUESDAY/  
 
ISSUED AT 110 PM CDT MON AUG 18 2025  
 
RAIN HAS ENDED ACROSS THE AREA, WITH ONLY SOME LINGERING PATCHY  
DRIZZLE OR VERY LIGHT SHOWERS EXPECTED THROUGH THE AFTERNOON.  
SOME SCATTERING OF THE STRATUS IS PRESENT ACROSS PORTIONS OF  
WESTERN & SOUTHERN MINNESOTA, AND WE'RE EXPECTING TO SEE MORE  
CLEARING TO VFR BY LATE AFTERNOON. THE LOW CEILINGS WILL BUILD  
BACK TONIGHT HOWEVER, ALONG WITH AREAS OF FOG AS A RESULT OF  
THE VERY WET GROUND FROM HEAVY RAIN OVER THE WEEKEND. IFR  
VISIBILITY & CEILINGS LOOK LIKE A CERTAINTY AFTER MIDNIGHT  
THROUGH AT LEAST SUNRISE BUT A FEW HOURS OF LIFR CONDITIONS  
ALSO LOOK POSSIBLE, ESPECIALLY ACROSS CENTRAL MINNESOTA &  
WESTERN WISCONSIN. DECIDED TO KEEP CONDITIONS LOW-END IFR FOR  
NOW, BUT WILL MONITOR TRENDS & ADD IN THESE LOWER CONDITIONS AS  
NEEDED TONIGHT. WINDS WILL GENERALLY BECOME EASTERLY THIS  
AFTERNOON & THEN NORTHERLY OVERNIGHT, BUT WILL MOSTLY BE LIGHT &  
VARIABLE DURING THE NIGHT.  
 
KMSP...  
SCATTERING OF THE LOW CEILINGS IS EXPECTED BY MID-AFTERNOON,  
WITH MVFR CEILINGS RETURNING BY MIDNIGHT. CONDITIONS WILL  
CONTINUE TO DEGRADE TO IFR OVERNIGHT, WITH VISIBILITY BELOW 1SM  
& CEILINGS BELOW 500 FT FOR A FEW HOURS EARLY TOMORROW MORNING.  
 
/OUTLOOK FOR KMSP/  
WED...VFR. WIND E 5KTS.  
THU...VFR. WIND S 5-10KTS.  
FRI...VFR. CHANCE -SHRA/-TSRA. WIND NW 5-10 KTS.  
 
 
   
MPX WATCHES/WARNINGS/ADVISORIES  
 
MN...NONE.  
WI...NONE.  
 
 
 
 
 
DISCUSSION...TDH  
AVIATION...ETA  
CLICK HERE TO GO TO PREVIOUS BULLETINS.
The Nexlab MN Page
The Nexlab WI Page
Main Text Page