003  
FNUS73 KDLH 221155  
FWSDLH  
 
SPOT FORECAST FOR SANDSTONE NORTH RX...MN DNR  
NATIONAL WEATHER SERVICE DULUTH MN  
655 AM CDT FRI SEP 22 2023  
 
FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON SEPTEMBER 22.  
IF THERE ARE QUESTIONS OR CONCERNS WITH THIS FORECAST, OR IF  
CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL  
WEATHER SERVICE IN DULUTH AT 218-729-0653.  
   
DISCUSSION
 
 
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS RETURN BY MID TO LATE  
AFTERNOON, WITH COVERAGE OF SHOWERS INCREASING BY LATE EVENING  
INTO TONIGHT. COULD SEE THE POTENTIAL FOR A LOCALIZED POCKET OF  
0.5 TO 1 INCH OF RAIN IF THUNDERSTORMS MOVE DIRECTLY OVERHEAD.  
 
WINDS WILL BE GENERALLY OUT OF THE EAST AT 10 MPH TODAY WITH  
OCCASIONAL GUSTS UP TO 15 TO 18 MPH THIS AFTERNOON UNDER MOSTLY  
CLOUDY SKIES, WITH WINDS BEING MORE ERRATIC NEAR ANY  
THUNDERSTORMS. MINIMUM RELATIVE HUMIDITY WILL DROP TO NEAR 55  
PERCENT THIS AFTERNOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF  
SHOWERS EARLY IN THE AFTERNOON. SLIGHT CHANCE  
OF THUNDERSTORMS LATE IN THE AFTERNOON. CHANCE  
OF SHOWERS LATE IN THE AFTERNOON.  
CHANCE OF PCPN......30 PERCENT.  
LAL.................1 UNTIL 1600, THEN 2.  
MAX TEMPERATURE.....AROUND 77.  
MIN HUMIDITY........55 PERCENT.  
WIND (20 FT)........EAST WINDS 8 TO 10 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS LATE IN THE  
AFTERNOON.  
MIXING HEIGHT.......4900 FT AGL INCREASING TO 5300 FT AGL LATE IN  
THE AFTERNOON, THEN DECREASING TO 3300 FT AGL  
LATE IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHEAST 15 TO 21 MPH.  
SMOKE DISPERSAL.....GOOD (40700 KNOT-FT) INCREASING TO EXCELLENT  
(75200-94600 KNOT-FT) EARLY IN THE AFTERNOON,  
THEN DECREASING TO GOOD (50000 KNOT-FT) LATE IN  
THE AFTERNOON.  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
PCPN AMOUNT.........0.00 INCHES.  
 
TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM  
SKY COVER.......MC MC MC MC MC MC  
WEATHER COV..... SCH SCH CHC CHC  
WEATHER TYPE.... RW RW RW RW  
TSTM COV........ SCH SCH SCH SCH  
CHC OF PCPN (%).10 10 20 20 30 30  
LAL.............1 1 1 1 2 2  
TEMP............74 74 75 75 73 72  
RH..............57 59 55 55 59 64  
20 FT WIND DIR..E E E E E E  
20 FT WIND SPD..8 9 10 10 10 9  
20 FT WIND GUST.15 16 18 18 18 16  
MIX HGT (KFT)...3.1 4.9 5.3 4.4 3.6 3.3  
TRANSP WIND DIR.E SE SE SE SE E  
TRANSP WIND SPD.15 21 21 20 17 17  
HAINES INDEX....4 3 3 3 3 3  
SDSPL KT-FT/100041 88 95 75 54 50  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). SLIGHT CHANCE OF  
THUNDERSTORMS IN THE EVENING. CHANCE OF RAIN  
SHOWERS THROUGH THE NIGHT. CHANCE OF  
THUNDERSTORMS OVERNIGHT. PATCHY FOG OVERNIGHT.  
CHANCE OF PCPN......50 PERCENT.  
LAL.................2.  
MIN TEMPERATURE.....AROUND 58.  
MAX HUMIDITY........100 PERCENT.  
WIND (20 FT)........EAST WINDS 7 TO 9 MPH. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS IN THE EVENING.  
GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS OVERNIGHT.  
MIXING HEIGHT.......1700 FT AGL.  
TRANSPORT WINDS.....EAST 12 TO 15 MPH.  
SMOKE DISPERSAL.....POOR TO FAIR (4700-18900 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
PCPN AMOUNT.........0.26 INCHES.  
 
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM  
SKY COVER.......MCLDY MCLDY MCLDY MCLDY CLOUDY CLOUDY  
WEATHER COV.....CHANCE CHANCE CHANCE CHANCE CHANCE CHANCE  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........S CHC S CHC S CHC S CHC CHANCE CHANCE  
CHC OF PCPN (%).30 40 40 50 40 40  
LAL.............2 2 2 2 2 2  
TEMP............71 63 61 60 59 59  
RH..............66 93 100 100 100 100  
20 FT WIND......E 7 E 8 E 9 E 8 E 8 E 8  
20 FT WIND GUST.15 14 14 14 13 14  
MIX HGT (FT)....1700 500 700 500 500 500  
TRANSPORT WIND..E 13 E 13 E 15 E 14 E 12 E 13  
HAINES INDEX....3 3 3 3 3 3  
SDSPL KT-FT/100019 6 9 6 5 6  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (80-90 PERCENT). PATCHY FOG EARLY  
IN THE MORNING. RAIN SHOWERS LIKELY AND CHANCE  
OF THUNDERSTORMS THROUGH THE DAY.  
CHANCE OF PCPN......60 PERCENT.  
LAL.................2 UNTIL 1300, THEN 3.  
MAX TEMPERATURE.....AROUND 75.  
MIN HUMIDITY........64 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 8 TO 16 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS IN THE  
MORNING. GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS IN THE AFTERNOON.  
MIXING HEIGHT.......1900 FT AGL INCREASING TO 4400 FT AGL LATE IN  
THE MORNING.  
TRANSPORT WINDS.....SOUTHEAST 13 TO 22 MPH INCREASING TO 21 TO 23  
MPH LATE IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR TO FAIR (6400-19300 KNOT-FT) INCREASING TO  
GOOD TO EXCELLENT (50200-88000 KNOT-FT).  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
PCPN AMOUNT.........0.20 INCHES.  
 
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM  
SKY COVER.......CLOUDY CLOUDY MCLDY MCLDY MCLDY MCLDY  
WEATHER COV.....CHANCE LIKELY LIKELY LIKELY LIKELY LIKELY  
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........CHANCE S CHC S CHC S CHC CHANCE CHANCE  
CHC OF PCPN (%).30 60 60 60 60 60  
LAL.............2 2 2 2 3 3  
TEMP............59 60 63 68 72 74  
RH..............100 100 97 81 71 64  
20 FT WIND......E 8 E 10 E 13 SE 15 SE 15 SE 16  
20 FT WIND GUST.14 14 19 21 21 22  
MIX HGT (FT)....600 1000 1900 3700 4400 3600  
TRANSPORT WIND..E 13 SE 14 SE 17 SE 21 SE 23 SE 23  
HAINES INDEX....3 3 3 3 4 4  
SDSPL KT-FT/10006 12 29 66 88 73  
 

 
FORECASTER...CORY  
REQUESTED BY...JOSHUA KOELSCH  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2321126.2/DLH  
.DELDT 09/22/23  
.FORMATTERVERSION 2.0.0  
.EMAIL JOSHUA.KOELSCH@STATE.MN.US  
 
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