FNUS73 KFSD 061440 FWSFSD Spot Forecast for Hales Slough Pothoff...Iowa DNR Wildlife National Weather Service Sioux Falls SD 940 AM CDT Sun Apr 6 2025 If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Westerly to southwesterly wind prevails through the afternoon. Winds increase late this morning into the early afternoon, with sustained winds around 10-15 mph and gusts to 20 mph. Relative humidity values fall to 25-30 percent this afternoon at peak heating with temperatures in the upper 50s. Mixing heights are expected to climb to around 7,000 ft AGL by 3-4pm. Winds shift to the northwest this evening. A cold front drops southward after 7pm this evening, reaching Interstate 90 by 10pm. Behind the front gusty northerly winds will develop with gusts upwards of 30 mph, with the strongest winds expected after midnight or so and into the overnight hours. Temperatures cool into the 40s on Monday with a north to northeast wind around 15 mph in the morning (gusts to 25 mph), slowly tapering down during the afternoon hours. .REST OF TODAY... Max temperature.....Around 57. Min humidity........27 percent. TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......PC PC PC MC PC PC PC PC Sky (%).........39 44 49 54 45 37 28 26 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 Temp............40 44 48 52 54 56 57 56 Dewpoint........25 25 26 26 25 24 23 23 RH..............55 47 42 36 32 29 27 27 20 FT wind dir..W W W W W W W W 20 FT wind spd..9 10 12 13 14 15 15 15 20 FT wind gust.21 22 22 21 20 21 21 20 Mix hgt (kft)...1.3 2.3 3.4 4.4 5.3 6.1 6.9 7.3 Transp wind dir.W W W W W W W W Transp wind spd.18 17 18 20 21 21 21 21 Smoke Dispersal.FR GD GD EX EX EX EX EX .TONIGHT... Min temperature.....Around 25. Max humidity........72 percent. TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR Sky (%).........24 22 21 19 17 15 12 10 13 15 18 16 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............56 55 51 48 44 42 40 37 35 32 30 28 Dewpoint........24 25 25 27 28 28 29 28 26 24 21 19 RH..............29 32 36 44 53 57 64 70 69 72 69 68 20 FT wind dir..WNW WNW WNW WNW NW NW N N N N N N 20 FT wind spd..14 13 10 9 9 10 14 17 17 17 17 17 20 FT wind gust.20 18 15 14 14 17 24 29 30 30 29 28 Mix hgt (kft)...5.5 1.1 0.8 0.6 0.5 0.7 1.0 1.0 1.1 1.3 1.8 2.1 Transp wind dir.W W W W WNW N N N N N NNE NNE Transp wind spd.20 15 13 12 13 16 20 22 24 23 24 23 Smoke Dispersal.EX FR PR PR PR PR FR FR FR FR GD GD .MONDAY... Max temperature.....Around 39. Min humidity........35 percent. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR CLR CLR Sky (%).........15 14 14 15 15 13 11 9 8 6 5 5 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............27 27 27 28 30 31 33 34 36 37 38 38 Dewpoint........18 17 16 15 14 14 14 13 13 13 13 13 RH..............68 65 63 58 51 49 45 41 38 37 35 35 20 FT wind dir..NNE NNE NNE NNE NNE NNE N N N N N N 20 FT wind spd..16 16 16 16 16 16 15 15 14 13 13 12 20 FT wind gust.26 24 23 22 21 20 18 18 17 17 16 15 Mix hgt (kft)...2.4 2.6 2.7 3.0 3.3 3.7 4.1 4.4 4.5 4.6 4.7 4.5 Transp wind dir.NNE NNE N N N N N N N N N N Transp wind spd.23 23 22 21 20 18 17 16 15 15 14 13 Smoke Dispersal.GD GD GD GD GD GD EX EX GD GD GD GD $$ Forecaster...SG Requested by...Chris LaRue Type of request...PRESCRIBED .TAG 2508985.0/FSD .DELDT 04/06/25 .FormatterVersion 2.0.0