138  
FNUS73 KABR 170946  
FWSABR  
 
SPOT FORECAST FOR SPRING LAKE WPA...US FISH AND WILDLIFE SERVICE  
NATIONAL WEATHER SERVICE ABERDEEN SD  
446 AM CDT MON MAY 17 2021  
 
FORECAST IS BASED ON A STARTING TIME OF 0900 CDT ON MAY 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE IN ABERDEEN SD.  
   
DISCUSSION
 
 
A RIDGE OF HIGH PRESSURE WILL DEPART THE AREA TODAY, ALLOWING THE  
LIGHT SOUTHEASTERLY WINDS AROUND DAYBREAK TO INCREASE THROUGH THE  
MORNING HOURS. THE SOUTHEASTERLY WIND DIRECTION WILL BE PRETTY  
STEADY THROUGH TOMORROW, WITH SIMILAR AFTERNOON GUSTS BOTH DAYS.  
AFTER A LITTLE BIT OF PATCHY GROUND FOG THIS MORNING, DAYTIME MIXING  
SHOULD LEAD TO FALLING RH VALUES, WITH MINIMUMS IN THE LOWER 30S  
THIS AFTERNOON. HIGH CLOUDS WILL MOVE OVER THE AREA AT TIMES THIS  
MORNING AND THEN EXPECT A FEW DAYTIME CUMULUS CLOUDS THIS  
AFTERNOON. INCREASING LOW LEVEL MOISTURE TOMORROW WILL LEAD TO  
HIGHER RH VALUES THAN SEEN TODAY.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT CLOUD).  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....74-79.  
MIN HUMIDITY........32-37 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 10 TO 15 MPH. GUSTS UP TO 22  
MPH LATE IN THE MORNING.  
MIXING HEIGHT.......4200-5200 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH INCREASING TO 16 TO 22  
MPH IN THE AFTERNOON.  
SMOKE DISPERSAL.....POOR (6600-99900).  
HAINES INDEX........4 OR (LOW).  
 
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........47 46 40 33 27 33 38 44 40  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............56 60 64 68 71 73 75 76 76  
RH..............83 75 63 52 47 41 37 34 36  
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE  
20 FT WIND SPD..10 13 14 15 15 15 15 15 15  
20 FT WIND GUST.15 17 20 21 22 22 22 22 22  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT CLOUD) THEN  
BECOMING MOSTLY CLOUDY (50-60 PERCENT CLOUD).  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....50-55.  
MAX HUMIDITY........95-100 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 8 TO 15 MPH. GUSTS UP TO 21 MPH  
EARLY IN THE EVENING.  
MIXING HEIGHT.......700-1700 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 12 TO 21 MPH.  
SMOKE DISPERSAL.....POOR (6000-81200).  
HAINES INDEX........3 TO 4 OR (VERY LOW) TO (LOW).  
 
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........37 33 35 36 38 39 39 40 45 51 56 59  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
TEMP............75 72 68 63 59 57 56 55 55 54 53 52  
RH..............38 44 52 62 75 80 83 86 86 93 96 100  
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE  
20 FT WIND SPD..15 14 13 10 9 9 9 9 9 8 8 8  
20 FT WIND GUST.21 20 17 15 14 15 16 16 16 14 14 14  
   
TUESDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT CLOUD). A SLIGHT  
CHANCE OF SHOWERS IN THE AFTERNOON.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....72-77.  
MIN HUMIDITY........48-53 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 8 TO 16 MPH. GUSTS UP TO 23 MPH  
IN THE AFTERNOON.  
MIXING HEIGHT.......2400-3400 FT AGL.  
TRANSPORT WINDS.....SOUTH 13 TO 20 MPH.  
SMOKE DISPERSAL.....POOR (8500-58000).  
HAINES INDEX........3 OR (VERY LOW).  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........61 64 64 63 63 63 62 62 60 59 57 53  
WEATHER COV..... SCH SCH SCH SCH SCH  
WEATHER TYPE.... RW RW RW RW RW  
TSTM COV........  
TEMP............52 53 55 59 62 66 68 71 72 73 74 74  
RH..............100 100 96 87 78 68 61 55 53 51 50 50  
20 FT WIND DIR..SE SE SE SE S SE SE SE SE SE SE SE  
20 FT WIND SPD..8 9 10 12 13 13 14 14 15 15 16 16  
20 FT WIND GUST.14 15 16 17 17 17 20 20 21 21 23 23  
 

 
FORECASTER...SRF  
REQUESTED BY...SONYA FEASTER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2112681.0/ABR  
.DELDT 05/17/21  
.FORMATTERVERSION 1.0.26  
.EMAIL SONYA_FEASTER@FWS.GOV  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab SD Page
The Nexlab MN Page Main Text Page