596
FNUS73 KFSD 141319
FWSFSD
SPOT FORECAST FOR MASON RX...USFWS
NATIONAL WEATHER SERVICE SIOUX FALLS SD
819 AM CDT TUE APR 14 2026
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS WILL BE OUT OF THE NORTHWEST THIS MORNING, GRADUALLY TURNING
TO THE NORTH IN THE AFTERNOON. WINDS WILL BE AROUND 8-12 MPH WITH
GUSTS TO AROUND 15-20 MPH. HIGHS TODAY WILL BE IN THE MIDDLE TO UPPER
60S WITH RELATIVE HUMIDITY VALUES DROPPING TO AROUND 40% IN THE
AFTERNOON. A FEW SHOWERS WILL BE POSSIBLE AFTER MIDNIGHT TONIGHT
AND INTO THE DAY ON WEDNESDAY. WEDNESDAY WILL BE ANOTHER MILD DAY
WITH RELATIVE HUMIDITY VALUES AS LOW AS 45%. SHOWERS EXIT OFF TO
THE EAST OF THE AREA HEADING INTO WEDNESDAY NIGHT.
REST OF TODAY
MAX TEMPERATURE.....AROUND 67.
MIN HUMIDITY........42 PERCENT.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY COVER.......MC MC MC MC MC MC MC MC MC
SKY (%).........80 82 83 81 78 65 69 68 62
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 10 0 0 10 10 10 10 10
CHC OF THDR (%).0 0 0 0 10 10 10 10 10
TEMP............50 54 58 60 62 64 65 65 66
DEWPOINT........48 48 47 45 44 43 43 42 42
RH..............93 80 67 58 52 46 45 43 42
20 FT WIND DIR..W NW NW NNW NNW NNW N N N
20 FT WIND SPD..8 9 10 10 10 10 10 12 12
20 FT WIND GUST.13 13 14 15 15 16 16 16 16
MIX HGT (KFT)...0.6 1.0 1.4 1.8 2.3 2.4 2.9 2.9 3.0
TRANSP WIND DIR.W WNW WNW NNW NNW NNW N N N
TRANSP WIND SPD.8 12 14 15 14 15 15 17 16
SMOKE DISPERSAL.PR PR FR FR FR GD GD GD GD
TONIGHT
MIN TEMPERATURE.....AROUND 44.
MAX HUMIDITY........93 PERCENT.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY COVER.......MCLDY MCLDY MCLDY PCLDY PCLDY PCLDY
SKY (%).........57 57 51 38 44 43
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).10 10 10 10 10 10
CHC OF THDR (%).10 0 0 0 0 0
TEMP............63 59 52 49 47 45
DEWPOINT........42 43 43 43 42 42
RH..............46 55 71 80 83 89
20 FT WIND......N 10 N 9 N 7 NNE 6 NE 6 NNE 6
20 FT WIND GUST.15 13 12 10 9 8
MIX HGT (FT)....2900 800 600 400 300 300
TRANSPORT WIND..N 14 N 13 N 13 N 13 NNE 10 NNE 7
SMOKE DISPERSAL.GOOD POOR POOR POOR POOR POOR
WEDNESDAY
MAX TEMPERATURE.....AROUND 66.
MIN HUMIDITY........46 PERCENT.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY COVER.......MCLDY MCLDY MCLDY MCLDY PCLDY PCLDY
SKY (%).........51 72 52 54 50 39
WEATHER COV..... S CHC S CHC S CHC CHANCE CHANCE
WEATHER TYPE....NONE RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
TSTM COV........
CHC OF PCPN (%).10 20 20 20 30 30
CHC OF THDR (%).0 0 0 0 0 0
TEMP............44 46 52 58 63 65
DEWPOINT........42 42 44 44 44 44
RH..............93 86 74 60 50 46
20 FT WIND......NE 6 NNE 6 NNE 7 NNE 8 NNE 10 NE 10
20 FT WIND GUST.8 9 12 13 15 15
MIX HGT (FT)....200 400 800 1900 3200 4700
TRANSPORT WIND..N 7 N 8 N 8 N 10 NNW 12 NNW 12
SMOKE DISPERSAL.POOR POOR POOR FAIR GOOD GOOD
FORECASTER...SAMET
REQUESTED BY...JAMES CORBETT
TYPE OF REQUEST...PRESCRIBED
.TAG 2610281.0/FSD
.DELDT 04/14/26
.FORMATTERVERSION 2.0.0
.EMAIL JAMES_CORBETT@FWS.GOV,DANIEL_PAULSON@FWS.GOV
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