784
FNUS73 KFSD 151141
FWSFSD
SPOT FORECAST FOR TNC-MAKOCE WASHTE PRAIRIE...THE NATURE CONSERVANCY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
641 AM CDT FRI MAY 15 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
VERY DRY CONDITIONS TODAY WITH RELATIVE HUMIDITY AROUND 20% AND
TEMPERATURES IN THE UPPER 80S. NO PRECIPITATION EXPECTED TODAY.
WINDS START THE DAY AS LIGHT AND VARIABLE, SHIFTING TO WESTERLY
LATE THIS MORNING AND EARLY THIS AFTERNOON, THEN TO NORTHWESTERLY
THIS EVENING. GUSTS AROUND 20 MPH EXPECTED LATE THIS AFTERNOON
INTO THE EVENING HOURS. WINDS THEN SHIFT NORTHERLY TONIGHT, WITH
WINDS AROUND 5 MPH EXPECTED. RH RECOVERS OVERNIGHT TO AROUND 50%.
CONDITIONS REMAIN DRY THROUGH THE AFTERNOON SATURDAY, WITH LOW
RELATIVE HUMIDITY AROUND 20%. EASTERLY WINDS EXPECTED SATURDAY
WITH GUSTS AROUND 15 MPH. RAIN AND STORM CHANCES INCREASE LATE
SATURDAY EVENING INTO THE OVERNIGHT HOURS SUNDAY.
REST OF TODAY
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........21 PERCENT.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......CLR CLR CLR CLR MCR CLR MCR MCR MCR
SKY (%).........2 1 1 3 6 1 9 6 12
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 10 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0
TEMP............66 76 80 82 84 86 86 86 87
DEWPOINT........47 46 45 42 41 41 42 43 44
RH..............50 34 29 24 22 21 21 22 22
20 FT WIND DIR..W W W WNW W W W W WNW
20 FT WIND SPD..3 6 6 7 9 9 10 12 12
20 FT WIND GUST.9 12 14 15 16 16 18 17 18
MIX HGT (KFT)...0.8 1.9 5.0 6.2 7.5 7.8 8.6 8.8 8.2
TRANSP WIND DIR.NNW NNW WNW W WSW W W WSW W
TRANSP WIND SPD.7 10 9 10 12 13 15 15 16
SMOKE DISPERSAL.PR FR GD GD EX EX EX EX EX
TONIGHT
MIN TEMPERATURE.....AROUND 52.
MAX HUMIDITY........46 PERCENT.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY COVER.......MCLEAR PCLDY PCLDY PCLDY PCLDY PCLDY
SKY (%).........22 28 27 28 29 39
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0
CHC OF THDR (%).0 10 10 10 0 0
TEMP............85 79 68 63 58 55
DEWPOINT........44 41 38 36 35 34
RH..............24 26 33 36 42 45
20 FT WIND......NW 13 NNW 15 N 13 N 9 NNE 8 N 9
20 FT WIND GUST.18 22 17 14 12 13
MIX HGT (FT)....6700 500 400 400 400 400
TRANSPORT WIND..W 15 NNW 15 N 15 N 13 NNE 10 NNE 10
SMOKE DISPERSAL.EXCEL POOR POOR POOR POOR POOR
SATURDAY
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........18 PERCENT.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY COVER.......PCLDY MCLDY PCLDY MCLDY MCLDY MCLDY
SKY (%).........48 52 42 56 55 55
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0
TEMP............53 58 72 78 82 82
DEWPOINT........33 35 35 34 34 36
RH..............46 42 26 20 18 19
20 FT WIND......NNE 10 NE 12 NE 13 E 13 E 14 ESE 16
20 FT WIND GUST.14 17 18 20 21 24
MIX HGT (FT)....400 600 2500 4900 7300 5600
TRANSPORT WIND..NNE 13 NNE 13 ENE 15 E 15 E 15 SE 18
SMOKE DISPERSAL.POOR POOR GOOD EXCEL EXCEL EXCEL
FORECASTER...SG
REQUESTED BY...JOE BLASTICK
TYPE OF REQUEST...PRESCRIBED
.TAG 2613707.0/FSD
.DELDT 05/15/26
.FORMATTERVERSION 2.0.0
.EMAIL JBLASTICK@TNC.ORG
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