FNUS73 KDLH 211007 FWSDLH Spot Forecast for B Unit...MN DNR National Weather Service Duluth MN 507 AM CDT Tue Apr 21 2026 Forecast is based on ignition time of 0900 CDT on April 21. 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... Surface high pressure will build into the region today, providing light winds and sunny skies. Mixing heights will be similar to yesterday, with only good ventilation rates. Min RH values are expected to drop to 15-20%. High pressure will move off to the east on Wednesday with southerly flow returning to the region. We could still see some low RHs on Wednesday once again despite the return flow being slightly more moist. Min RHs at this time look to be around 25% with southerly winds gradually increasing through the day. By the afternoon we expect to see wind gusts of around 15 mph. .TODAY... Sky/weather.........Sunny (0-5 percent). Chance of pcpn......0 percent. Max temperature.....Around 70. Min humidity........16 percent. Wind (20 ft)........Light winds becoming north 5 to 6 mph in the late morning and afternoon. Mixing height.......1500 ft AGL increasing to 4400 ft AGL. Transport winds.....North 5 to 12 mph. Smoke dispersal.....Poor to fair (1600-14700 knot-ft) increasing to fair to good (23600-33800 knot-ft) late in the morning. Pcpn amount.........0.00 inches. TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 Temp............42 48 55 60 64 66 68 69 70 69 RH..............70 56 45 37 29 23 20 18 16 18 20 FT wind dir..N NE NE NE N N N N N N 20 FT wind spd..3 4 4 5 5 5 5 5 4 4 20 FT wind gust.7 9 12 12 12 12 11 11 9 8 Mix hgt (kft)...0.6 1.2 1.5 2.4 3.0 3.8 4.0 4.1 4.4 4.1 Transp wind dir.N N NE N N N N N N N Transp wind spd.7 12 12 12 12 10 9 9 8 8 SDspl kt-ft/10003 12 15 24 31 34 32 33 31 29 .TONIGHT... Sky/weather.........Mostly clear (5-15 percent). Chance of pcpn......0 percent. Min temperature.....Around 38. Max humidity........70 percent. Wind (20 ft)........Light winds. Mixing height.......3800 ft AGL decreasing to 1400 ft AGL. Transport winds.....North 5 to 7 mph shifting to the southeast 5 to 12 mph early in the evening. Smoke dispersal.....Poor to fair (5800-23000 knot-ft) decreasing to poor (2000 knot-ft) early in the evening. Pcpn amount.........0.00 inches. TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky cover.......CLR CLR MCR MCR MCR MCR MCR MCR MCR CLR CLR CLR Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............69 67 61 57 52 50 47 44 43 41 40 39 RH..............21 24 31 38 44 44 51 58 57 62 67 67 20 FT wind dir..NE NE E E E E SE SE SE SE SE SE 20 FT wind spd..3 2 2 3 3 3 3 3 3 3 3 3 20 FT wind gust.7 6 6 6 6 6 7 7 7 8 8 8 Mix hgt (kft)...3.8 1.4 0.6 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 Transp wind dir.N NE E E E E SE SE SE SE SE SE Transp wind spd.7 5 5 6 8 9 8 7 10 10 12 12SDspl kt-ft/100023 6 2 2 3 3 3 2 4 4 4 4 .WEDNESDAY... Sky/weather.........Sunny (5-15 percent). Chance of pcpn......0 percent. Max temperature.....Around 79. Min humidity........26 percent. Wind (20 ft)........Light winds becoming southeast 5 to 12 mph early in the morning. Mixing height.......2000 ft AGL increasing to 3900 ft AGL in the afternoon. Transport winds.....South 10 to 18 mph increasing to 20 to 21 mph late in the afternoon. Smoke dispersal.....Poor to fair (3500-18100 knot-ft) increasing to good to excellent (50700-67100 knot-ft). Pcpn amount.........0.00 inches. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......CLR CLR CLR MCR MCR MCR MCR MCR 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............38 40 44 51 59 65 70 73 76 78 79 79 RH..............70 70 68 61 51 43 38 31 30 27 26 27 20 FT wind dir..SE SE SE SE SE SE S S S S S S 20 FT wind spd..3 3 4 5 7 8 8 9 10 11 11 10 20 FT wind gust.8 8 11 12 14 14 15 16 18 18 19 19 Mix hgt (kft)...0.4 0.4 0.6 0.9 1.4 2.0 2.7 3.3 3.7 3.9 3.7 3.0 Transp wind dir.SE SE S S S S S S S S S S Transp wind spd.12 10 10 13 15 16 16 16 18 20 21 20 SDspl kt-ft/10004 4 5 10 18 28 38 46 59 66 67 51 $$ Forecaster...Linda Requested by...sieve Type of request...PRESCRIBED .TAG 2610821.0/DLH .DELDT 04/21/26 .FormatterVersion 2.0.0 .EMAIL karl.sieve@state.mn.us