831  
FNUS73 KUNR 031719  
FWSUNR  
 
SPOT FORECAST FOR NATIONAL TRAILS DAY: SUNDANCE TRAIL...USFS  
NATIONAL WEATHER SERVICE RAPID CITY SD  
1119 AM MDT SAT JUN 3 2023  
 
FORECAST IS BASED ON FORECAST START TIME OF 1300 MDT ON JUNE 03.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION  
THUNDERSTORMS ARE EXPECTED ACROSS THE BLACK HILLS THIS  
AFTERNOON AND EVENING. AT THIS TIME, MOST OF THE THUNDERSTORM ACTIVITY  
WILL BE OVER THE CENTRAL AND NORTHERN BLACK HILLS WESTWARD THROUGH THE  
BEARLODGE MOUNTAINS AND INTO EASTERN WYOMING. THE MAIN THREAT FROM ANY  
THUNDERSTORM WILL BE LIGHTNING; SMALL HAIL; GUSTY, ERRATIC WINDS; AND  
BRIEF HEAVY RAIN. THUNDERSTORM CHANCES WILL TAPER OFF AFTER 1900-2000.  
   
REST OF TODAY  
 
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). CHANCE OF SHOWERS  
AND THUNDERSTORMS IN THE AFTERNOON.  
MAX TEMPERATURE.....AROUND 73.  
MIN HUMIDITY........55 PERCENT.  
CHANCE OF PCPN......40 PERCENT.  
MAX APPARENT TEMP...71.  
SURFACE WINDS (MPH).EAST-SOUTHEAST WINDS 6 TO 11 MPH, GUSTS TO 15 MPH.  
RAINFALL AMOUNT.....0.10-0.20 INCHES.  
 
TIME (MDT) 1PM 2PM 3PM 4PM 5PM  
SKY (%).........70 70 69 65 60  
WEATHER COV.....CHC CHC CHC CHC CHC  
WEATHER TYPE....TRW TRW TRW TRW TRW  
CHC OF PCPN (%).40 40 40 40 40  
TEMP............70 70 70 71 69  
RH..............59 61 59 57 61  
HEAT INDEX (F)..70 70 70 71 69  
SURFACE WND DIR.ESE ESE ESE ESE ESE  
SURFACE WND SPD.9 8 9 9 9  
SURFACE WND GST.14 13 13 13 13  
   
TONIGHT  
 
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING  
PARTLY CLOUDY (30-40 PERCENT). CHANCE OF  
SHOWERS AND THUNDERSTORMS EARLY IN THE EVENING.  
THUNDERSTORM CHANCES TAPER OFF AFTER 1900.  
MIN TEMPERATURE.....AROUND 55.  
MAX HUMIDITY........85-90 PERCENT.  
CHANCE OF PCPN......30 PERCENT.  
MAX APPARENT TEMP...68.  
SURFACE WINDS (MPH).SOUTHEAST WINDS 5 TO 10 MPH SHIFTING TO THE  
SOUTHWEST 5 TO 10 MPH IN THE LATE EVENING AND  
OVERNIGHT.  
RAINFALL AMOUNT.....0.05-0.10 INCHES.  
 
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID  
SKY (%).........56 58 55 53 45 46 45  
WEATHER COV.....CHC CHC CHC SCH SCH SCH  
WEATHER TYPE....TRW TRW TRW TRW TRW TRW  
CHC OF PCPN (%).30 30 30 20 20 20 10  
TEMP............68 67 62 60 60 59 58  
RH..............61 65 72 78 78 80 80  
HEAT INDEX (F)..68 67 62 60 60 59 58  
SURFACE WND DIR.SE SE S S S SW SW  
SURFACE WND SPD.9 8 7 6 6 6 6  
SURFACE WND GST.14 12 10 10 8 9 9  
 
 
FORECASTER...SE  
REQUESTED BY...EMILY REIF  
TYPE OF REQUEST...OTHER  
.TAG 2314135.0/UNR  
.DELDT 06/03/23  
.FORMATTERVERSION 2.0.0  
.EMAIL EMILY.REIF1@USDA.GOV  
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