151
FNUS73 KUNR 122220
FWSUNR
SPOT FORECAST FOR NORTH ROUTE WF...WFS
NATIONAL WEATHER SERVICE RAPID CITY SD
420 PM MDT TUE MAY 12 2026
FORECAST IS BASED ON FORECAST START TIME OF 1800 MDT ON MAY 12.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
...RED FLAG WARNING IN EFFECT FROM NOON WEDNESDAY TO 9 PM MDT
THURSDAY...
DISCUSSION
HOT, DRY, AND WINDY CONDITIONS ARE EXPECTED FOR THE
SPOT LOCATION WEDNESDAY AND THURSDAY. FOR THIS EVENING AND TONIGHT,
BREEZY NORTH WINDS WILL DIMINISH AROUND 8PM MDT, BECOMING LIGHT
AND MORE EASTERLY, THEN SOUTHEASTERLY, AND THEN FINALLY SOUTHERLY.
RH RECOVERY WILL BE FAIR TONIGHT, ROUGHLY 45 TO 50 PERCENT. LOW
RH'S CONTINUE WEDNESDAY, WITH HUMIDITY DROPPING TO AROUND 13
PERCENT IN THE AFTERNOON. WINDS PICK UP AGAIN OUT OF THE SOUTH
EARLY WEDNESDAY MORNING (6AM TO 8AM MDT) AND WILL CONTINUE THROUGH
THURSDAY AFTERNOON. GUSTS 30 TO 40 MPH WILL BE POSSIBLE IN THIS
TIMEFRAME. A RED FLAG WARNING HAS BEEN ISSUED OVER THE SPOT
LOCATION, VALID FROM NOON MDT WEDNESDAY, THROUGH 9 PM MDT
THURSDAY. WHILE THERE IS A SMALL CHANCE FOR A LIGHT SHOWER OR TWO
WEDNESDAY AND THURSDAY, THE NEXT DECENT CHANCES FOR WETTING RAINS
DO NOT COME UNTIL NEXT WEEK.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........51 PERCENT.
WIND (20 FT)........NORTHEAST WINDS AROUND 15 MPH WITH GUSTS TO
AROUND 21 MPH SHIFTING TO THE SOUTHEAST WITH
GUSTS TO AROUND 16 MPH IN THE LATE EVENING AND
OVERNIGHT.
CWR.................0 PERCENT.
MIXING HEIGHT.......400 TO 900 FT AGL.
TRANSPORT WINDS.....NORTH 20 TO 25 MPH SHIFTING TO THE SOUTHEAST 15
TO 20 MPH LATE IN THE EVENING.
SMOKE DISPERSAL.....FAIR DECREASING TO POOR EARLY IN THE EVENING.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........6 11 14 13 13 16 16 18 16 17 13 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............70 68 65 62 59 57 55 54 53 52 49 48
RH..............20 22 25 28 32 34 37 40 41 43 50 51
20 FT WIND DIR..N NE E E SE SE S S S S S S
20 FT WIND SPD..14 13 10 8 7 7 8 8 8 9 10 10
20 FT WIND GUST.21 18 15 12 10 12 12 13 13 14 15 16
MIX HGT (KFT)...7.4 2.9 0.6 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
TRANSP WIND DIR.N N E E E SE SE SE S S S S
TRANSP WIND SPD.22 17 14 12 10 12 12 12 13 14 15 17
WEDNESDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 90.
MIN HUMIDITY........13 PERCENT.
WIND (20 FT)........SOUTH WINDS 15 TO 25 MPH WITH GUSTS TO AROUND
31 MPH INCREASING TO AROUND 25 MPH WITH GUSTS
TO AROUND 33 MPH IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......7900 TO 8400 FT AGL.
TRANSPORT WINDS.....SOUTH 20 TO 30 MPH INCREASING TO 30 TO 35 MPH
IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO EXCELLENT.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........9 12 8 5 5 5 11 15 13 11 11 18
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............50 56 63 69 74 78 81 85 87 89 90 90
RH..............48 42 34 28 23 19 17 15 14 14 13 13
20 FT WIND DIR..S S S S S S S S S S S S
20 FT WIND SPD..12 15 17 20 20 21 22 22 21 22 23 24
20 FT WIND GUST.17 21 25 28 30 31 31 31 31 31 33 33
MIX HGT (KFT)...0.4 0.5 1.1 2.1 3.0 4.0 4.9 6.1 7.2 8.4 7.4 6.4
TRANSP WIND DIR.S S S S S S S S S S S S
TRANSP WIND SPD.20 22 25 29 30 31 32 32 32 32 32 33
WEDNESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF
SHOWERS OVERNIGHT.
MIN TEMPERATURE.....AROUND 62.
MAX HUMIDITY........48 PERCENT.
WIND (20 FT)........WINDY. SOUTH WINDS 25 TO 30 MPH SHIFTING TO THE
SOUTHWEST AFTER 3 AM. GUSTS UP TO 41 MPH
DECREASING TO 31 MPH AFTER 3 AM.
CWR.................0 PERCENT.
MIXING HEIGHT.......700 TO 1200 FT AGL.
TRANSPORT WINDS.....SOUTH 35 TO 45 MPH SHIFTING TO THE SOUTHWEST 30
TO 35 MPH AFTER 3 AM.
SMOKE DISPERSAL.....GOOD DECREASING TO POOR IN THE LATE EVENING AND
OVERNIGHT.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........31 43 47 49 44 62 81 91 80 82 81 55
WEATHER COV..... SCH SCH SCH
WEATHER TYPE.... RW RW RW
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............88 86 83 79 77 75 75 73 72 69 64 62
RH..............14 16 19 25 26 28 28 31 34 39 46 48
20 FT WIND DIR..S S S S S S S S S S SW SW
20 FT WIND SPD..24 25 26 28 29 30 30 30 28 25 23 21
20 FT WIND GUST.33 35 38 39 39 41 41 40 38 35 31 28
MIX HGT (KFT)...5.4 3.9 2.3 0.8 0.8 0.8 0.7 0.8 0.8 0.8 0.8 0.8
TRANSP WIND DIR.S S S S S S S S S S SW SW
TRANSP WIND SPD.35 37 38 40 41 43 43 41 39 36 32 30
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
MAX TEMPERATURE.....AROUND 85.
MIN HUMIDITY........11 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 20 MPH SHIFTING TO THE
NORTHWEST. GUSTS UP TO 33 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......8900 TO 9400 FT AGL INCREASING TO 10900 TO
11400 FT AGL LATE IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 30 MPH SHIFTING TO THE NORTHWEST
EARLY IN THE MORNING.
SMOKE DISPERSAL.....VERY GOOD INCREASING TO EXCELLENT.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........51 47 36 25 19 12 6 7 8 8 9 10
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............63 67 70 72 73 75 76 79 82 84 85 84
RH..............44 37 31 26 23 20 18 15 13 12 11 11
20 FT WIND DIR..W NW NW NW NW N N NW NW W W W
20 FT WIND SPD..20 21 24 24 23 21 20 17 15 15 16 18
20 FT WIND GUST.26 29 31 33 31 29 26 26 28 29 29 29
MIX HGT (KFT)...0.8 1.6 2.5 3.3 4.0 4.8 5.5 7.5 9.4 11 11 11
TRANSP WIND DIR.W W NW N NW NW NW NW W W W W
TRANSP WIND SPD.28 30 32 35 33 30 28 26 26 26 28 30
FORECASTER...CS
REQUESTED BY...IAN MUIRHEAD
TYPE OF REQUEST...WILDFIRE
.TAG 2613477.1/UNR
.DELDT 05/12/26
.FORMATTERVERSION 2.0.0
.EMAIL IAN_MUIRHEAD@NPS.GOV,JUSTIN_EVANS2@HOTMAIL.COM
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page