809  
FNUS73 KGRB 220922  
FWSGRB  
 
SPOT FORECAST FOR HEMLOCK LAKE RX...USFS  
NATIONAL WEATHER SERVICE GREEN BAY WI  
422 AM CDT WED APR 22 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 CDT ON APRIL 22.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS OR CONCERNS WITH  
THIS FORECAST.  
   
DISCUSSION  
 
HIGH PRESSURE TRACKS THROUGH THE REGION TODAY. RHS WILL DROP INTO  
THE 20 TO 30 PERCENT RANGE WITH TEMPERATURES TRENDING MUCH WARMER  
INLAND FROM LAKE MICHIGAN. ANYONE PLANNING BURNS NEAR LAKE  
MICHIGAN OR THE BAY THE NEXT COUPLE DAYS SHOULD EXPECT LAKE  
BREEZES TO DEVELOP IN THE LATE MORNING AND AFTERNOON. LAKE BREEZES  
WILL BRING COOLER TEMPERATURES, ONSHORE WINDS (E-SE), HIGHER RH  
AND POOR SMOKE DISPERSAL TO LAKESHORE AREAS.  
 
THURSDAY WILL BE THE WINDIEST DAY OF THE WEEK, WITH SOUTH WINDS  
FORECAST TO GUST 20 TO 30 MPH. THE NEXT ROUND OF WIDESPREAD RAIN  
AND THUNDERSTORMS COMES THURSDAY NIGHT INTO FRIDAY.  
   
REST OF TODAY  
 
SKY/WEATHER.........SUNNY (5-15 PERCENT).  
MAX TEMPERATURE.....AROUND 69.  
MIN HUMIDITY........20 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH AROUND 5 MPH IN THE  
AFTERNOON.  
MIXING HEIGHT.......3200 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 13 MPH INCREASING TO AROUND 15 MPH  
LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (1300 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO GOOD (39900 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........2 0 0 1 18 16 16 13 15 10 7  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............35 43 51 56 59 62 66 68 68 69 67  
RH..............69 53 39 34 30 26 22 20 20 20 22  
20 FT WIND DIR..SE SE SE SE S S S S S S S  
20 FT WIND SPD..1 1 2 3 4 4 5 5 5 5 5  
20 FT WIND GUST.3 5 6 7 9 11 12 13 13 14 14  
MIX HGT (KFT)...0.3 0.4 1.1 1.7 2.2 2.5 2.8 3.0 3.2 3.2 3.1  
TRANSP WIND DIR.SE SE S SE S S S S S S S  
TRANSP WIND SPD.5 6 7 7 7 7 7 8 12 13 15  
SDSPL KT-FT/10001 2 6 10 13 15 17 21 32 35 40  
   
TONIGHT  
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT).  
MIN TEMPERATURE.....AROUND 43.  
MAX HUMIDITY........79 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS AROUND 5 MPH.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTH 12 TO 15 MPH.  
SMOKE DISPERSAL.....GOOD (30700 KNOT-FT) EARLY IN THE EVENING  
DECREASING TO POOR (3700 KNOT-FT) LATE IN THE  
NIGHT.  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........16 8 12 15 23 27 30 41 38 51 60 59  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............66 64 58 54 50 48 46 46 45 44 43 44  
RH..............25 28 36 41 48 51 53 53 53 58 67 70  
20 FT WIND DIR..S S SE SE SE SE SE SE SE S S S  
20 FT WIND SPD..5 5 5 5 5 5 5 5 5 5 5 5  
20 FT WIND GUST.14 14 14 14 14 14 14 14 14 14 14 14  
MIX HGT (KFT)...2.4 0.7 0.6 0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.15 13 13 14 14 13 13 14 14 15 12 12  
SDSPL KT-FT/100031 8 7 7 5 4 4 5 4 5 4 4  
   
THURSDAY  
 
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).  
MAX TEMPERATURE.....AROUND 75.  
MIN HUMIDITY........46 PERCENT.  
WIND (20 FT)........SOUTH WINDS 5 TO 10 MPH. GUSTS UP TO 25 MPH IN  
THE LATE MORNING AND AFTERNOON.  
MIXING HEIGHT.......3600 FT AGL.  
TRANSPORT WINDS.....SOUTH 14 TO 23 MPH INCREASING TO 21 TO 24 MPH  
LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (4400 KNOT-FT) EARLY IN THE MORNING  
INCREASING TO EXCELLENT (75100 KNOT-FT) IN THE  
AFTERNOON.  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........58 62 54 55 56 55 55 54 46 37 29 31  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............44 46 50 54 58 62 66 70 72 74 74 74  
RH..............73 79 77 74 69 65 56 51 49 46 46 46  
20 FT WIND DIR..S S S S S S S S S S S S  
20 FT WIND SPD..5 5 5 6 7 8 9 9 10 10 10 9  
20 FT WIND GUST.14 14 15 16 18 19 20 21 22 22 23 22  
MIX HGT (KFT)...0.4 0.4 0.9 1.1 1.3 1.8 2.3 2.8 3.3 3.6 3.5 2.9  
TRANSP WIND DIR.S S S S S S S S S S S S  
TRANSP WIND SPD.14 14 16 16 15 17 21 23 24 24 23 21  
SDSPL KT-FT/10004 4 13 16 17 26 42 57 69 75 70 52  
 
 
FORECASTER...KURIMSKI  
REQUESTED BY...CHAD HOWARD  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2610971.1/GRB  
.DELDT 04/22/26  
.FORMATTERVERSION 2.0.0  
.EMAIL CHAD.HOWARD@USDA.GOV  
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