123
FNUS73 KDLH 201359
FWSDLH
SPOT FORECAST FOR TAIL RX...FOREST SEERVICE
NATIONAL WEATHER SERVICE DULUTH MN
859 AM CDT MON APR 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON APRIL 20.
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
A RED FLAG WARNING IS IN EFFECT TODAY FROM 1100 TO 2000 IN INTERIOR
LAKE/COOK COUNTY DUE TO A COMBINATION OF STRONG SOUTH TO SOUTH-
SOUTHWEST WINDS AND DRY RELATIVE HUMIDITY. THE AREA OF GREATEST
CONCERN FOR MIN RH LESS THAN 25% WILL BE FARTHER INLAND THAN THE
TAIL RX LOCATION, NORTH OF SAWBILL LAKE. FOR THE BURN SITE, MIN RH
THIS AFTERNOON WILL BE CLOSER TO 30%, AS SOUTH WINDS BRING SOME
MOISTURE NORTH FROM LAKE SUPERIOR. SOUTHERLY WINDS WILL BE
INCREASING TO 6-10 MPH WITH GUSTS UP TO 21 MPH IN THE AFTERNOON. A
DRY COLD FRONT MOVES THROUGH TONIGHT, WITH WINDS SHIFTING FROM THE
SOUTHWEST TO WEST AROUND 2300 THIS EVENING. NORTHWEST WINDS ARE
ANTICIPATED TOMORROW FOLLOWING THE COLD FRONT WITH DRIER RH. MIN RH
TOMORROW WILL BE VERY DRY AROUND 21% WITH LIGHTER NORTHWEST WINDS AS
HIGH PRESSURE MOVES IN.
REST OF TODAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).
CHANCE OF PCPN......10 PERCENT.
MAX TEMPERATURE.....AROUND 46.
MIN HUMIDITY........30 PERCENT.
WIND (20 FT)........SOUTH WINDS 6 TO 10 MPH. GUSTS UP TO 21 MPH
LATE IN THE AFTERNOON.
MIXING HEIGHT.......3000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 16 TO 25 MPH INCREASING TO 24 TO 26
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (25300 KNOT-FT) INCREASING TO GOOD
(43700-59300 KNOT-FT) IN THE LATE MORNING AND
AFTERNOON.
PCPN AMOUNT.........0.00 INCHES.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......PC PC MC MC MC MC MC MC PC
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 10 0 0 10 0 0
TEMP............30 31 33 35 38 40 43 44 45
RH..............40 41 43 41 32 32 30 30 31
20 FT WIND DIR..S S S S S S S S SW
20 FT WIND SPD..5 6 8 9 10 10 10 10 10
20 FT WIND GUST.7 12 14 16 18 18 19 18 16
MIX HGT (KFT)...1.8 2.7 2.7 2.9 2.8 3.0 2.6 2.5 2.3
TRANSP WIND DIR.S SW SW S S SW SW SW SW
TRANSP WIND SPD.16 20 18 20 21 23 25 26 24
SDSPL KT-FT/100025 46 44 49 51 59 57 58 49
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
CHANCE OF PCPN......0 PERCENT.
MIN TEMPERATURE.....AROUND 32.
MAX HUMIDITY........85 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 9 MPH IN THE EVENING
BECOMING LIGHT, THEN BECOMING NORTHWEST 5 TO 6
MPH OVERNIGHT.
MIXING HEIGHT.......2200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 14 TO 23 MPH SHIFTING TO THE
NORTHWEST AROUND 14 MPH OVERNIGHT.
SMOKE DISPERSAL.....GOOD (44600 KNOT-FT) DECREASING TO POOR TO FAIR
(6000-13300 KNOT-FT).
PCPN AMOUNT.........0.00 INCHES.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY COVER.......PC PC PC MCR CLR MCR MCR CLR CLR MCR MCR MCR
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............46 44 44 40 39 39 38 38 36 35 34 34
RH..............34 41 47 56 59 64 68 70 76 81 84 85
20 FT WIND DIR..SW SW SW SW SW W W W W NW NW NW
20 FT WIND SPD..9 8 7 5 4 4 3 5 5 5 4 4
20 FT WIND GUST.14 14 14 16 15 14 14 14 14 13 13 13
MIX HGT (KFT)...2.2 1.0 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.SW SW SW SW SW W W W NW N N N
TRANSP WIND SPD.23 15 14 15 16 16 15 14 14 14 14 14
SDSPL KT-FT/100045 13 7 8 8 8 7 6 6 6 6 6
TUESDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH.
MIXING HEIGHT.......2200 FT AGL INCREASING TO 3800 FT AGL LATE IN
THE MORNING.
TRANSPORT WINDS.....NORTHWEST 12 TO 20 MPH.
SMOKE DISPERSAL.....POOR (6000-12100 KNOT-FT) INCREASING TO FAIR TO
GOOD (26300-45900 KNOT-FT) IN THE LATE MORNING
AND EARLY AFTERNOON, THEN INCREASING TO GOOD
(41300-48100 KNOT-FT) LATE IN THE AFTERNOON
DECREASING TO FAIR (27100 KNOT-FT) LATE IN THE
AFTERNOON.
PCPN AMOUNT.........0.00 INCHES.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MCR MCR MCR MCR CLR CLR CLR CLR MCR MCR MCR MCR
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............33 32 35 38 44 48 51 54 55 56 56 55
RH..............85 85 71 59 45 38 31 25 25 21 22 27
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..4 4 5 5 5 5 5 5 5 5 4 4
20 FT WIND GUST.13 14 14 15 14 14 14 13 13 13 12 12
MIX HGT (KFT)...0.5 0.5 0.9 1.5 2.2 2.6 2.9 3.3 3.7 3.7 3.8 2.8
TRANSP WIND DIR.N N N N NW NW N NW NW NW NW NW
TRANSP WIND SPD.14 14 16 20 20 20 17 16 15 14 13 12
SDSPL KT-FT/10006 6 12 26 37 44 43 46 48 45 41 27
FORECASTER...WOODY
REQUESTED BY...LEE OMDAHL
TYPE OF REQUEST...PRESCRIBED
.TAG 2610866.0/DLH
.DELDT 04/20/26
.FORMATTERVERSION 2.0.0
.EMAIL LEE.OMDAHL@USDA.GOV
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