888  
FXUS63 KGRB 142310  
AFDGRB  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GREEN BAY WI  
610 PM CDT WED APR 14 2021  
 
UPDATED AVIATION PORTION FOR 00Z TAF ISSUANCE  
   
SHORT TERM
 
TONIGHT AND THURSDAY  
ISSUED AT 257 PM CDT WED APR 14 2021  
 
AN UPPER LOW OVER LOWER MICHIGAN AND A SURFACE  
TROUGH MOVING SOUTH ACROSS NORTHEAST WISCONSIN WILL PRODUCE  
SCATTERED RAIN AND SNOW SHOWERS THROUGH TONIGHT.  
 
FORECAST SOUNDINGS SUGGEST THAT THE PRECIPITATION WILL BE LARGELY  
RAIN UNTIL MIDDLE TO LATE EVENING WHEN BOUNDARY LAYER TEMPERATURES  
COOL ENOUGH FOR SNOW TO REACH THE GROUND. THERE COULD BE A SMALL  
ACCUMULATION OF SNOW ON THE GRASS MOSTLY IN THE FAR NORTHEAST PART  
OF THE STATE.  
 
SOME CLEARING IS EXPECTED BY THURSDAY AFTERNOON AS THE LOW  
PRESSURE SYSTEM MOVES AWAY AND HIGH PRESSURE BEGINS TO ARRIVE FROM  
THE NORTHERN PLAINS.  
   
LONG TERM
 
THURSDAY NIGHT THROUGH WEDNESDAY  
ISSUED AT 257 PM CDT WED APR 14 2021  
 
FAIRLY UNEVENTFUL WEATHER AT THE START OF THE LONG TERM FORECAST,  
WITH THE NEXT CHANCE FOR PRECIPITATION EARLY NEXT WEEK.  
TEMPERATURES WILL BE NEAR NORMAL THROUGH THE WEEKEND AND THEN  
TREND BELOW NORMAL BY NEXT TUESDAY.  
 
BY 00Z/FRI UPPER LOW WILL BE ACROSS THE EASTERN GREAT LAKES. SOME  
LINGERING CLOUDY COVER WILL PERSIST, ESPECIALLY ACROSS EASTERN WI,  
BUT EXPECT DECREASING CLOUDS THURSDAY NIGHT INTO FRIDAY MORNING  
DUE TO WEAK RIDGING. THIS WEEKEND, MEDIUM RANGE MODELS ARE IN  
DECENT AGREEMENT SHOWING TWO DIFFERENT SHORTWAVES TRACK SOUTH OR  
WEST OF WI. THIS WILL LIKELY BRING SOME CLOUDS TO THE AREA,  
ESPECIALLY ON SATURDAY, BUT PRECIPITATION WILL REMAIN MUCH  
FARTHER SOUTH. MODEL TIME SECTIONS SHOW FAIRLY DRY AIR ACROSS THE  
AREA BY SUNDAY, WHICH SHOULD BRING A RETURN OF SUNSHINE.  
MEANWHILE, TEMPS WILL BE NEAR NORMAL WITH HIGHS IN THE 50S AND  
LOWS IN THE MIDDLE 20S TO MIDDLE 30S.  
 
ON MONDAY, POTENT SHORTWAVE AND ASSOCIATED SFC COLD FRONT MOVE  
FROM SOUTHERN MANITOBA SOUTH ACROSS WISCONSIN. THIS WILL BRING A  
CHANCE FOR RAIN AND SNOW SHOWERS TO THE ENTIRE FORECAST AREA. RAIN  
DURING THE DAY, WITH SNOW POSSIBLE EARLY MONDAY MORNING, OR  
MONDAY NIGHT INTO TUESDAY MORNING WHEN TEMPERATURES DROP BELOW  
FREEZING. AT THIS TIME ANY SNOW ACCUMULATIONS LOOK MINOR. BEHIND  
THE COLD FRONT COOLER AIR CAN BE EXPECTED FOR AT LEAST A COUPLE  
DAYS, WITH HIGHS ON TUESDAY IN THE 40S AND LOWS WEDNESDAY MORNING  
IN THE 20S. A SECONDARY PUSH OF COLD AIR MAY KEEP TEMPS ABOUT 10  
DEGREES BELOW NORMAL THROUGH THE WEEK.  

 
   
AVIATION
 
FOR 00Z TAF ISSUANCE  
ISSUED AT 609 PM CDT WED APR 14 2021  
 
AN UPPER LOW PRESSURE SYSTEM WILL MOVE ACROSS WISCONSIN INTO  
MICHIGAN AND PRODUCE CLOUDY SKIES AND SCATTERED SNOW OR RAIN  
SHOWERS TONIGHT. MVFR CEILINGS ARE EXPECTED IN MOST PLACES,  
THOUGH A PERIOD OF VFR CONDITIONS IS POSSIBLE. SKIES SHOULD CLEAR  
THURSDAY AFTERNOON WITH DRIER WEATHER ACROSS THE REGION.  

 
   
GRB WATCHES/WARNINGS/ADVISORIES
 
 
NONE.  

 
 

 
 
SHORT TERM.....RDM  
LONG TERM......KLJ  
AVIATION.......KURIMSKI  
 
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