642
FNUS73 KUNR 291422
FWSUNR
SPOT FORECAST FOR MOUNT RUSHMORE FIREWORKS PREPERATIONS...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
822 AM MDT MON JUN 29 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 MDT ON JUNE 30.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
ELEVATED FIRE CONDITIONS ARE EXPECTED TODAY AND
TOMORROW, WITH MINIMUM RELATIVE HUMIDITY FALLING INTO THE UPPER
TEENS. GUSTY SOUTHWEST WINDS EXPECTED TODAY, WITH GUSTS UP TO
30 TO 35 MPH.
LIGHTER WINDS DEVELOP TUESDAY WITH WARM AND DRY CONDITIONS. AMPLE
SUNSHINE COUPLED RH FALLING TO AROUND 15 PERCENT WILL RESULT IN
CONTINUED ELEVATED FIRE WEATHER CONCERNS, ALTHOUGH WINDS WILL BE
GENERALLY LIGHT AND TERRAIN DRIVEN TUESDAY AFTERNOON. DIURNALLY DRIVEN
WINDS WILL PERSIST OVERNIGHT TUESDAY.
ISOLATED THUNDERSTORMS ARE POSSIBLE TUESDAY EVENING INTO THE OVERNIGHT
HOURS, WITH GUSTY WINDS AND LIGHTNING THE MAIN THREATS. OVERALL, CHANCE OF
THUNDER IS AROUND 20-30 PERCENT TUESDAY EVENING.
TUESDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 81.
MIN HUMIDITY........15-20 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX APPARENT TEMP...79.
SURFACE WINDS (MPH).TERRAIN VARIABLE WINDS WITH UPSLOPE AND
UPVALLEY FLOWS DOMINATING, 5 TO 10 MPH.
GUSTS UP TO 12 TO 16 MPH, ESPECIALLY ON
EXPOSED/UNSHELTERED UPPER SLOPES.
RAINFALL AMOUNT.....0.00 INCHES.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........16 8 4 3 4 5 7 8 9 8 11 11
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............55 58 62 68 72 73 75 77 79 79 79 81
RH..............43 40 36 31 27 23 21 18 17 16 15 16
HEAT INDEX (F)..55 58 62 68 72 73 75 77 79 79 79 79
SURFACE WND DIR.W W W W SW SW SW SW SW SW SW SW
SURFACE WND SPD.3 3 2 3 3 5 5 5 5 5 3 3
SURFACE WND GST.13 13 12 13 15 16 16 16 16 16 15 14
TUESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE EVENING, THEN
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
OVERNIGHT.
MIN TEMPERATURE.....AROUND 59.
MAX HUMIDITY........60 PERCENT.
CHANCE OF PCPN......30 PERCENT.
MAX APPARENT TEMP...79.
SURFACE WINDS (MPH).LIGHT WINDS; DIURNALLY DRIVEN WINDS. GUSTY,
ERRATIC WINDS WITH ANY SHOWERS OR STORMS.
RAINFALL AMOUNT.....0.04 INCHES.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........16 25 47 68 70 72 74 72 70 68 64 61
WEATHER COV.....CHC CHC CHC CHC CHC CHC SCH SCH SCH SCH SCH SCH
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 SCH SCH SCH
CHC OF PCPN (%).30 30 30 30 30 30 20 20 20 20 20 20
TEMP............79 76 72 68 65 63 62 61 60 60 59 59
RH..............20 24 30 36 41 46 50 51 53 53 57 57
HEAT INDEX (F)..79 76 72 68 65 63 62 61 60 60 59 59
SURFACE WND DIR.S S W N N N N N NW NW NW NW
SURFACE WND SPD.2 2 2 2 2 1 1 1 1 1 1 2
SURFACE WND GST.10 8 8 9 8 7 6 6 6 6 7 7
FORECASTER...SE
REQUESTED BY...OWEN MURNANE
TYPE OF REQUEST...OTHER
.TAG 2616426.0/UNR
.DELDT 06/29/26
.FORMATTERVERSION 2.0.0
.EMAIL OWEN_MURNANE@NPS.GOV
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