785
FNUS73 KUNR 271818
FWSUNR
SPOT FORECAST FOR MOUNT RUSHMORE FIREWORKS PREPERATIONS...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
1218 PM MDT SAT JUN 27 2026
FORECAST IS BASED ON FORECAST START TIME OF 0800 MDT ON JUNE 28.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
DRY WEATHER IS EXPECTED SUNDAY AND MONDAY DURING THE
DAY, BUT THUNDERSTORMS ARE POSSIBLE SUNDAY NIGHT, SOME OF WHICH
MAY BE ON THE STRONG SIDE WITH GUSTY, ERRATIC WINDS. MINIMUM
RELATIVE HUMIDITY BOTH DAYS WILL BE AROUND 20%. BARELY FAIR
RELATIVE HUMIDITY RECOVERY (55%) IS EXPECTED TONIGHT. SOUTHWEST TO
WEST WINDS ARE EXPECTED, EXCEPT AT NIGHT WHERE TERRAIN DOMINATED
WINDS WILL OCCUR OUTSIDE OF ANY THUNDERSTORM INFLUENCE.
SUNDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........20 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX APPARENT TEMP...79.
SURFACE WINDS (MPH).SOUTHWEST WINDS 5 TO 10 MPH WITH GUSTS
FROM 10 TO 20.
RAINFALL AMOUNT.....0.00 INCHES.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 6 5 6 9 10 13 21 34 42
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0
TEMP............67 72 75 76 76 77 79 79 79 79
RH..............33 27 24 22 22 22 20 20 20 20
HEAT INDEX (F)..67 72 75 76 76 77 79 79 79 79
SURFACE WND DIR.W SW SW SW SW SW SW SW SW SW
SURFACE WND SPD.8 9 9 9 9 9 9 8 8 7
SURFACE WND GST.15 15 16 16 18 20 20 18 19 20
SUNDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING, THEN
RAIN SHOWERS LIKELY AND SLIGHT CHANCE OF
THUNDERSTORMS OVERNIGHT.
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........55 PERCENT.
CHANCE OF PCPN......60 PERCENT.
MAX APPARENT TEMP...77.
SURFACE WINDS (MPH).SOUTHWEST WINDS 5 TO 10 MPH WITH GUSTS TO AROUND
20 MPH SHIFTING TO THE NORTHWEST AROUND 5 MPH
WITH GUSTS TO AROUND 15 MPH LATE IN THE
EVENING, THEN BECOMING LIGHT AND TERRAIN
DRIVEN OVERNIGHT. ERRATIC WINDS NEAR
THUNDERSTORMS.
RAINFALL AMOUNT.....0.08 INCHES.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........70 69 72 69 71 76 54 32 37 44 35 14
WEATHER COV.....CHC CHC CHC CHC CHC CHC LKY LKY LKY LKY LKY LKY
WEATHER TYPE....RW RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........CHC CHC CHC SCH SCH SCH SCH SCH SCH
CHC OF PCPN (%).50 50 50 50 50 50 60 60 60 60 60 60
TEMP............77 74 72 67 65 62 60 59 58 58 57 57
RH..............22 26 30 36 40 46 53 55 53 51 51 49
HEAT INDEX (F)..77 74 72 67 65 62 60 59 58 58 57 57
SURFACE WND DIR.SW W W W NW NW NW NW NW NW NW W
SURFACE WND SPD.6 5 5 5 5 5 3 3 3 5 5 5
SURFACE WND GST.23 20 17 17 17 16 16 10 10 10 10 10
MONDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........19 PERCENT.
CHANCE OF PCPN......10 PERCENT.
MAX APPARENT TEMP...75.
SURFACE WINDS (MPH).WEST WINDS 5 TO 10 MPH WITH GUSTS 15 TO 25
MPH SHIFTING TO THE SOUTHWEST.
RAINFALL AMOUNT.....0.00 INCHES.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........38 31 24 17 15 13 11 13 16 18 16 15
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).10 10 10 10 10 10 0 0 0 0 0 0
TEMP............57 59 61 64 67 69 71 73 74 74 74 73
RH..............48 48 43 36 31 27 24 22 20 19 19 19
HEAT INDEX (F)..57 59 62 64 67 70 72 73 74 75 75 74
SURFACE WND DIR.W W W W W SW SW SW SW SW SW SW
SURFACE WND SPD.5 5 6 7 8 8 9 10 12 12 12 12
SURFACE WND GST.15 15 15 18 19 19 20 22 22 22 22 22
FORECASTER...EH
REQUESTED BY...OWEN MURNANE
TYPE OF REQUEST...OTHER
.TAG 2616308.0/UNR
.DELDT 06/27/26
.FORMATTERVERSION 2.0.0
.EMAIL OWEN_MURNANE@NPS.GOV
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