FNUS73 KFSD 051056 FWSFSD Spot Forecast for McCormack Rx...OBrien County Conservation National Weather Service Sioux Falls SD 556 AM CDT Tue May 5 2026 If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Direction of light winds through 8 to 9 AM may be more variable and terrain-dependent than indicated in the table below. Direction should become more stable out of the northwest (320 to 310 degrees) as the mixed layer deepens, with gusts developing by 11 AM to Noon. Occasional gusts 20 to 25 mph will be common through the afternoon as the relative humidity drops to 25 to 30 percent. Similar conditions are expected for Wednesday, although the afternoon gusts will be slightly lower than today. Please note, the weather type of FST early Wednesday morning in the table below is Frost. .REST OF TODAY... Max temperature.....Around 56. Min humidity........27 percent. TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......MC MC MC MC MC MC MC MC MC MC Sky (%).........60 60 61 63 66 68 66 64 62 66 Weather cov..... Weather type.... Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 Temp............42 46 48 50 52 53 54 55 55 55 Dewpoint........27 26 26 25 24 23 23 23 23 22 RH..............55 45 42 37 33 31 30 29 29 27 20 FT wind dir..NW NW NW NW NW NW NW NW NW NW 20 FT wind spd..5 7 9 12 13 14 15 15 15 15 20 FT wind gust.9 12 14 16 18 21 21 21 21 21 Mix hgt (kft)...0.9 3.0 5.3 6.9 7.5 8.2 8.4 8.6 8.5 8.7 Transp wind dir.N NNW NNW NW NW NW WNW WNW WNW WNW Transp wind spd.10 13 18 22 22 22 20 20 20 21 Smoke Dispersal.PR GD EX EX EX EX EX EX EX EX .TONIGHT... Min temperature.....Around 32. Max humidity........72 percent. TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky cover.......MC MC MC MC MC MC MC MC PC MC MC PC Sky (%).........69 73 69 65 61 60 59 58 48 52 57 41 Weather cov..... WID WID Weather type.... FST FST 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............54 53 50 47 43 41 39 38 36 34 33 32 Dewpoint........22 22 22 22 22 23 23 24 24 24 24 24 RH..............28 29 33 37 43 48 52 57 61 66 69 72 20 FT wind dir..NW NNW NNW NNW N N N NNE NNE N N N 20 FT wind spd..15 14 10 9 7 6 6 6 5 5 3 3 20 FT wind gust.21 18 16 14 12 10 9 9 8 7 6 6 Mix hgt (kft)...8.4 7.7 1.2 0.8 0.8 0.8 0.7 0.8 0.5 0.4 0.4 0.4 Transp wind dir.NW NW NNW NNW N N N N N NNE NNE N Transp wind spd.21 20 17 13 14 13 14 13 10 8 8 7 Smoke Dispersal.EX EX FR PR PR PR PR PR PR PR PR PR .WEDNESDAY... Max temperature.....Around 54. Min humidity........28 percent. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......PC PC PC PC PC PC PC PC MC MC MC MC Sky (%).........32 29 36 40 44 46 48 50 51 52 53 56 Weather cov.....WID WID Weather type....FST FST Tstm cov........ Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0 Chc of thdr (%).0 M M M M M M M M M M M Temp............32 33 38 42 45 48 49 51 52 53 54 54 Dewpoint........24 24 26 26 25 24 24 23 23 23 23 23 RH..............72 69 62 53 45 39 37 33 32 31 30 30 20 FT wind dir..N N N N NNW NNW NNW NW NW NW NW NW 20 FT wind spd..3 3 5 6 7 8 9 10 12 13 13 13 20 FT wind gust.6 6 6 8 10 13 15 17 18 18 17 16 Mix hgt (kft)...0.4 0.4 1.9 4.0 6.0 7.0 7.6 7.8 8.3 8.7 8.8 8.8 Transp wind dir.N N N NNW NNW NNW NW NW NW NW NW NW Transp wind spd.7 5 6 10 15 16 15 15 16 18 20 20 Smoke Dispersal.PR PR PR GD EX EX EX EX EX EX EX EX $$ Forecaster...JH Requested by...Mark Wilson Type of request...PRESCRIBED .TAG 2612684.0/FSD .DELDT 05/05/26 .FormatterVersion 2.0.0 .EMAIL mwilson@obriencounty.iowa.gov