025  
FNUS73 KGRB 201104  
FWSGRB  
 
SPOT FORECAST FOR LUNDBERG RX...WISCONSIN DNR  
NATIONAL WEATHER SERVICE GREEN BAY WI  
604 AM CDT THU AUG 20 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 0600 CDT ON AUGUST 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS OR CONCERNS WITH  
THIS FORECAST.  
   
DISCUSSION
 
 
MIDDLE AND HIGH CLOUDS WILL MOVE ACROSS THE SITE TODAY, WITH SHOWERS  
AND A FEW STORMS ARRIVING LATE TONIGHT. RELATIVE HUMIDITY WILL DROP  
TO BETWEEN 30-35% THIS AFTERNOON. LIGHT AND VARIABLE WINDS WILL TURN  
TO THE SOUTHWEST LATER THIS MORNING AND GUST TO AROUND 15 MPH.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).  
MAX TEMPERATURE.....AROUND 81.  
MIN HUMIDITY........35 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 9 MPH IN  
THE AFTERNOON.  
MIXING HEIGHT.......5800 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 3 MPH SHIFTING TO THE SOUTHWEST 3  
TO 12 MPH, THEN SHIFTING TO THE SOUTH AROUND 13  
MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (1000 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (58000 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........9 14 14 14 15 26 37 49 52 56 59 58  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............51 50 56 62 70 73 75 78 79 81 81 80  
RH..............83 86 77 65 49 43 38 36 33 32 35 36  
20 FT WIND DIR..N N SE SW SW SW SW SW SW SW SW SW  
20 FT WIND SPD..0 0 1 2 4 4 5 6 7 8 9 9  
20 FT WIND GUST.2 2 3 5 6 8 11 12 13 14 14 14  
MIX HGT (KFT)...0.4 0.4 0.3 0.7 2.0 3.9 5.1 5.6 5.8 5.7 5.8 4.5  
TRANSP WIND DIR.S SW SW SW SW SW SW SW SW SW SW S  
TRANSP WIND SPD.3 3 3 5 7 7 8 9 10 12 12 13  
SDSPL KT-FT/10001 1 1 3 12 23 36 45 52 57 58 50  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF  
SHOWERS IN THE EVENING. CHANCE OF THUNDERSTORMS  
THROUGH THE NIGHT. SHOWERS LIKELY OVERNIGHT.  
MIN TEMPERATURE.....AROUND 61.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........SOUTH WINDS 6 TO 8 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS LATE IN THE  
EVENING. GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS LATE IN THE EVENING, THEN GUSTY  
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS  
AFTER 3 AM.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTH 9 TO 13 MPH.  
SMOKE DISPERSAL.....FAIR (28500 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (3500 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY (%).........58 61 70 80 79 67  
WEATHER COV..... S CHC CHANCE LIKELY CHANCE  
WEATHER TYPE....NONE NONE RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........ S CHC CHANCE CHANCE S CHC  
TEMP............79 72 67 64 62 62  
RH..............41 57 73 87 93 97  
20 FT WIND......SW 8 S 7 S 7 S 7 S 6 S 7  
20 FT WIND GUST.14 14 15 14 14 14  
MIX HGT (FT)....2600 500 400 500 500 500  
TRANSPORT WIND..S 13 S 9 S 10 SW 9 SW 12 S 12  
SDSPL KT-FT/100029 4 4 4 5 5  
 

 
FORECASTER...BERSCH  
REQUESTED BY...ZAK KNAB  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2620071.0/GRB  
.DELDT 08/20/26  
.FORMATTERVERSION 2.0.0  
.EMAIL ZACHARY.KNAB@WISCONSIN.GOV  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab WI Page Main Text Page