Spot Forecast
Issued by NWS Sioux Falls, SD

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900
FNUS73 KFSD 130255
FWSFSD

Spot Forecast for Lake Henry RX...South Dakota Game FIsh and Parks
National Weather Service Sioux Falls SD
955 PM CDT Sun May 12 2024

If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Light north or northeast wind and poor smoke dispersion through 8
AM. Winds will increase through the morning. Smoke dispersion
improves by mid day with winds becoming more NNE at sustained 10
to 15 mph with occasional gusts up to 20 mph. Latest high
resolution models suggest areas of smoke from Canadian wildfires
will filter through aloft and may reach the surface across
southeast South Dakota tonight, lingering through the day Monday.
Upstream observations with visibility as low as 4 miles has been
observed in this near surface smoke.

Temperatures, initially starting in the upper 40s, will warm to
around 70 degrees with a afternoon minimum humidity around 30
percent. The next chance of rain comes Tuesday night.

.MONDAY...

Max temperature.....Around 70.
Min humidity........34 percent.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky cover.......MCLEAR CLEAR  CLEAR  CLEAR  CLEAR  MCLEAR
Sky (%).........19     5      3      4      4      6
Weather cov.....                     AREAS  AREAS
Weather type....NONE   NONE   NONE   SMOKE  SMOKE  NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
Temp............49     53     62     66     69     70
Dewpoint........39     40     41     40     40     41
RH..............67     62     47     38     34     35
20 ft wind......NE 10  ENE 12 ENE 12 NE 12  NNE 10 NNE 12
20 ft wind gust.17     18     15     15     15     14
Mix hgt (ft)....400    900    2000   5100   6300   6400
Transport wind..ENE 14 E 16   ENE 15 NNE 14 N 15   N 15
Haines index....5      5      5      5      4      4
Smoke Dispersal.POOR   FAIR   FAIR   EXCEL  EXCEL  EXCEL

.MONDAY NIGHT...

Min temperature.....Around 45.
Max humidity........76 percent.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky cover.......CLEAR  CLEAR  CLEAR  CLEAR  CLEAR  CLEAR
Sky (%).........4      3      2      1      2      2
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
Temp............69     64     56     52     49     47
Dewpoint........40     40     40     39     39     38
RH..............34     41     55     61     67     71
20 ft wind......NE 10  ENE 9  ENE 9  ENE 8  E 8    E 8
20 ft wind gust.13     12     12     12     12     12
Mix hgt (ft)....5700   700    400    400    400    400
Transport wind..N 14   NE 12  NE 12  ENE 10 ENE 10 E 10
Haines index....4      4      4      4      5      5
Smoke Dispersal.EXCEL  POOR   POOR   POOR   POOR   POOR

$$
Forecaster...BP
Requested by...Jonny Pfeifer
Type of request...PRESCRIBED
.TAG 2413891.0/FSD
.DELDT 05/12/24
.FormatterVersion 2.0.0