983  
FXUS63 KARX 252333  
AFDARX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE LA CROSSE WI  
633 PM CDT FRI MAY 25 2018  
   
SHORT TERM
 
(TONIGHT THROUGH SATURDAY NIGHT)  
ISSUED AT 132 PM CDT FRI MAY 25 2018  
 
GOES-EAST WATER VAPOR IMAGERY SHOWING A MID-LEVEL TROUGH MOVING EAST  
THROUGH THE NORTHERN PLAINS INTO MN. IMPRESSIVE PLUME OF MOISTURE  
STREAMING INTO OUR AREA WHICH IS TRANSLATING TO A VERY WARM/HUMID  
AIRMASS OVER THE REGION. A FEW SHOWERS AND STORMS WERE FIRING FROM  
TIME TO TIME IN A LINE FROM NORTH CENTRAL WI INTO SOUTHEAST MN IN  
THIS PLUME AND IN ADVANCE OF THIS TROUGH. TEMPERATURES AS OF 2 PM  
WERE IN THE 70S TO MIDDLE 80S WITH DEW POINTS IN THE 60S.  
 
STILL A CHANCE FOR A FEW STRONG STORMS LATER THIS AFTERNOON INTO  
THIS EVENING AS THE TROUGH CONTINUES TO PUSH INTO/THROUGH OUR AREA.  
WIND GUSTS TO 40 MPH, HEAVY DOWNPOURS, AND FREQUENT LIGHTNING WOULD  
BE THE MAIN THREATS ALONG WITH SOME SMALL HAIL. LOOK FOR THE BULK OF  
THIS ACTIVITY TO EXIT SOUTH OF THE AREA AROUND MIDNIGHT. COULD STILL  
SEE A FEW POP-UP SHOWERS OVERNIGHT AS A WEAK SECONDARY MID-LEVEL  
TROUGH DROPS THROUGH THE REGION. OVERNIGHT LOWS WILL BE IN THE UPPER  
50S TO THE MIDDLE 60S.  
 
A FEW SHOWERS/STORMS WILL BE POSSIBLE OVER NORTHERN WI SATURDAY AS  
ANOTHER WEAK TROUGH ROTATES EAST THROUGH THAT AREA. OTHERWISE, LOOK  
VERY WARM HIGHS IN THE UPPER 80S TO THE LOWER 90S.  
   
LONG TERM
 
(SUNDAY THROUGH FRIDAY)  
ISSUED AT 132 PM CDT FRI MAY 25 2018  
 
THE HEAT CONTINUES FOR SUNDAY INTO MEMORIAL DAY AS A MID-LEVEL RIDGE  
OF HIGH PRESSURE AMPLIFIES ACROSS THE REGION. 850MB TEMPERATURES  
SUNDAY INCREASE TO NEAR +20C WHILE 925MB HEATS UP INTO THE +27 TO  
+30C RANGE. THIS IS EXPECTED TO PRODUCE HIGHS WELL INTO THE 90S FOR  
MOST PLACES, NEARING OR EXCEEDING RECORD LEVELS. SEE CLIMATE SECTION  
BELOW. MEMORIAL DAY MAY END UP A FEW DEGREES COOLER AS CLOUDS WILL  
BE ON THE INCREASE FROM CONVECTION OVER THE PLAINS. COULD ALSO SEE A  
FEW SHOWERS/STORMS ROUNDING TOP OF THE RIDGE INTO OUR AREA AS WELL.  
 
SHOWER AND THUNDERSTORM CHANCES WILL BE ON THE INCREASE TUESDAY INTO  
WEDNESDAY AS A MID-LEVEL TROUGH NUDGES IN FROM THE PLAINS. HIGHS  
WILL CONTINUE TO BE WELL ABOVE NORMAL WITH READINGS WELL INTO THE  
80S.  
 
SMALL-END SHOWER/THUNDER CHANCES CONTINUE THURSDAY INTO FRIDAY AS A  
COUPLE VERY WEAK TROUGHS RIPPLE OVER THE MEAN RIDGE, OTHERWISE,  
TEMPERATURES WILL CONTINUE TO STAY WELL ABOVE NORMAL WITH HIGHS IN  
THE 80S.  
 

 
   
AVIATION
 
(FOR THE 00Z TAFS THROUGH 00Z SATURDAY EVENING)  
ISSUED AT 633 PM CDT FRI MAY 25 2018  
 
FIRST LINE OF SHOWERS AND THUNDERSTORMS HAS MOVED SOUTH AND EAST  
OF TAF AIRFIELDS. A SECONDARY BROKEN LINE OF STORMS EXTENDS FROM  
SOUTH CENTRAL MN INTO WEST-CENTRAL WI. THE EVOLUTION OF THIS LINE  
IS UNCERTAIN GIVEN WEAK FORCING AND DIMINISHING INSTABILITY INTO  
THE EVENING. WILL KEEP TAFS DRY FOR NOW, BUT MAY NEED TO AMEND IF  
STORMS HOLD TOGETHER OR BECOME MORE WIDESPREAD.  
 
OTHERWISE, EXPECT VFR CONDITIONS AT KLSE/KRST THROUGH THE PERIOD  
WITH LIGHT WINDS FROM THE SOUTH-SOUTHWEST, EVENTUALLY TURNING TO  
THE WEST-SOUTHWEST SATURDAY MORNING.  
 

 
   
CLIMATE
 
 
ISSUED AT 132 PM CDT FRI MAY 25 2018  
 
HIGH TEMPERATURES OVER THE NEXT FEW DAYS WILL BE IN NEAR OR RECORD  
BREAKING TERRITORY. HERE ARE THE STANDING RECORD HIGHS AND YEARS  
OCCURRED FOR LA CROSSE AND ROCHESTER:  
 
ROCHESTER LA CROSSE  
 
MAY 26 91 (1939) 94 (1967)  
 
MAY 27 93 (1914) 96 (1874)  
 
MAY 28 95 (2006) 95 (1874)  
 

 
   
ARX WATCHES/WARNINGS/ADVISORIES
 
 
WI...NONE.  
MN...NONE.  
IA...NONE.  

 
 

 
 
SHORT TERM...DAS  
LONG TERM...DAS  
AVIATION...ROGERS  
 
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