Spot Forecast
Issued by NWS Sioux Falls, SD
Issued by NWS Sioux Falls, SD
139 FNUS73 KFSD 281517 FWSFSD Spot Forecast for Cottonwood WPA...U.S. Fish & Wildlife National Weather Service Sioux Falls SD 1017 AM CDT Tue Apr 28 2026 If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Per our conversations, the increase in west northwest winds Wednesday afternoon combined with mixing heights around 5-7K ft AGL, should lead to good to excellent dispersion. .WEDNESDAY... Max temperature.....Around 56. Min humidity........42 percent. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky cover.......PC PC PC MCR MCR PC PC MC PC MC PC Sky (%).........43 26 32 23 21 33 29 55 47 51 49 Weather cov..... SCH SCH Weather type.... RW RW Tstm cov........ Chc of pcpn (%).0 0 0 0 10 10 10 10 20 20 10 Chc of thdr (%).M M M M M M M M M M M Temp............36 39 42 47 49 52 54 54 56 54 54 Dewpoint........33 34 34 34 34 33 32 33 33 32 33 RH..............87 82 72 60 56 48 44 44 42 42 44 20 FT wind dir..W W W WNW WNW WNW WNW WNW WNW NW NW 20 FT wind spd..3 3 5 6 8 9 10 12 12 12 12 20 FT wind gust.7 8 10 10 14 15 16 17 17 17 17 Mix hgt (kft)...0.5 1.1 2.0 3.7 5.5 6.6 7.0 7.4 7.8 7.7 6.5 Transp wind dir.NNW WNW WNW WNW WNW WNW WNW WNW WNW WNW NW Transp wind spd.6 7 7 10 12 15 16 16 18 20 16 Smoke Dispersal.PR PR PR GD GD EX EX EX EX EX EX .WEDNESDAY NIGHT... Min temperature.....Around 34. Max humidity........84 percent. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky cover.......PCLDY PCLDY PCLDY PCLDY PCLDY PCLDY Sky (%).........42 44 42 37 38 45 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Chc of pcpn (%).10 10 10 10 10 10 Chc of thdr (%).M M M M M M Temp............54 49 43 40 38 36 Dewpoint........33 35 34 33 32 31 RH..............44 58 70 75 79 83 20 ft wind......NNW 12 N 8 NNW 6 N 6 N 6 N 6 20 ft wind gust.16 14 12 10 10 10 Mix hgt (ft)....5800 1300 400 400 700 700 Transport wind..NNW 15 N 8 N 7 NNE 9 NNE 10 N 9 Smoke Dispersal.EXCEL POOR POOR POOR POOR POOR .THURSDAY... Max temperature.....Around 51. Min humidity........38 percent. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Sky cover.......PCLDY PCLDY PCLDY PCLDY PCLDY PCLDY Sky (%).........42 40 40 31 34 49 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ Chc of pcpn (%).10 10 10 10 10 10 Chc of thdr (%).M M M M M M Temp............34 36 42 47 50 51 Dewpoint........30 29 29 28 28 27 RH..............84 74 60 49 42 39 20 ft wind......N 6 N 7 N 10 NNW 13 NNW 15 NNW 15 20 ft wind gust.10 13 15 18 20 20 Mix hgt (ft)....300 1500 4000 5800 6900 7200 Transport wind..N 8 N 12 NNW 16 NNW 18 NNW 21 NNW 21 Smoke Dispersal.POOR FAIR GOOD EXCEL EXCEL EXCEL $$ Forecaster...Dux Requested by...Jimmy Corbett Type of request...PRESCRIBED .TAG 2611940.0/FSD .DELDT 04/29/26 .FormatterVersion 2.0.0 .EMAIL james_corbett@fws.gov,ryan_williams@fws.gov