603
FNUS73 KUNR 021729
FWSUNR
SPOT FORECAST FOR BIGLEY...FOREST SERVICE
NATIONAL WEATHER SERVICE RAPID CITY SD
1129 AM MDT SUN AUG 2 2026
FORECAST IS BASED ON FORECAST START TIME OF 1200 MDT ON AUGUST 02.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
NEAR-CRITICAL FIRE WEATHER CONDITIONS AREA EXPECTED
TODAY AS AFTERNOON HUMIDITIES DROP TO AS LOW AS 13%. A WEAK FRONT
WILL BRING NORTHERLY WINDS TODAY WITH GUSTS TO 20 MPH. ANOTHER
MILD AND DRY NIGHT IS EXPECTED TONIGHT WITH POOR HUMIDITY RECOVERY
(~45%). NORTHERLY WINDS WILL CONTINUE THROUGH THE NIGHT.
NEAR CRITICAL CONDITIONS EXPECTED MONDAY. WINDS WILL INCREASE
MONDAY MORNING (AFTER 9 AM) BEHIND A STRONGER COLD FRONT. EXPECT
NORTH WINDS OF 10 TO 20 MPH WITH GUSTS UP TO 30 MPH BY AFTERNOON.
COOLER TEMPERATURES ARE EXPECTED MONDAY, HOWEVER, THE MINIMUM
HUMIDITY WILL STILL BE RELATIVELY LOW (~22%).
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). AREAS OF SMOKE.
MAX TEMPERATURE.....AROUND 99.
MIN HUMIDITY........13 PERCENT.
WIND (20 FT)........NORTH WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 22
MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......11200 TO 11700 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 20 MPH.
SMOKE DISPERSAL.....EXCELLENT DECREASING TO GOOD LATE IN THE
AFTERNOON.
TIME (MDT) 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........27 28 30 35 38 35
WEATHER COV.....ARS ARS ARS ARS ARS ARS
WEATHER TYPE....SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............96 96 97 96 95 94
RH..............13 13 13 13 14 15
20 FT WIND DIR..N N N N N NE
20 FT WIND SPD..5 6 6 6 5 5
20 FT WIND GUST.22 22 22 22 21 21
MIX HGT (KFT)...7.8 7.8 6.8 12 5.6 4.6
TRANSP WIND DIR.N N N N N N
TRANSP WIND SPD.16 16 16 16 16 16
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT).
MIN TEMPERATURE.....AROUND 63.
MAX HUMIDITY........47 PERCENT.
WIND (20 FT)........NORTHERLY WINDS 5 TO 10 MPH.
GUSTS UP TO 15 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......500 TO 1000 FT AGL.
TRANSPORT WINDS.....NORTH 10 TO 15 MPH SHIFTING TO THE NORTHWEST
OVERNIGHT.
SMOKE DISPERSAL.....POOR.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........33 39 44 48 54 50 30 28 28 28 35 45
WEATHER COV.....ARS ARS ARS ARS ARS ARS ARS ARS ARS
WEATHER TYPE....SMK SMK SMK SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............90 86 81 77 74 73 72 70 69 67 65 64
RH..............17 20 23 28 30 31 34 36 39 43 45 47
20 FT WIND DIR..NE NE N NE N N NE W W NW NW NW
20 FT WIND SPD..5 3 2 2 2 2 1 2 2 3 3 5
20 FT WIND GUST.20 16 15 14 14 14 14 14 14 14 14 16
MIX HGT (KFT)...3.4 2.2 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.N N N N N N N NW NW NW NW NW
TRANSP WIND SPD.15 13 12 10 9 9 9 9 10 10 10 12
MONDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). AREAS OF SMOKE IN
THE LATE MORNING AND AFTERNOON.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........NORTH WINDS 5 TO 15 MPH WITH GUSTS TO AROUND 31
MPH INCREASING TO AROUND 20 MPH WITH GUSTS TO
AROUND 32 MPH IN THE AFTERNOON.
CWR.................0 PERCENT.
MIXING HEIGHT.......5200 TO 5700 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH SHIFTING TO THE NORTH 25
TO 30 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....VERY GOOD.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........47 37 27 30 31 32 35 40 46 42 34 31
WEATHER COV..... ARS ARS ARS ARS ARS ARS ARS ARS ARS
WEATHER TYPE.... SMK SMK SMK SMK SMK SMK SMK SMK SMK
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
TEMP............64 67 71 75 77 79 79 80 80 80 80 78
RH..............46 43 38 32 28 26 25 24 23 21 21 22
20 FT WIND DIR..NW NW NW N N N N N N N N N
20 FT WIND SPD..5 6 6 7 9 13 14 14 14 14 14 16
20 FT WIND GUST.16 17 18 20 22 25 28 30 30 31 31 32
MIX HGT (KFT)...0.6 0.6 1.1 1.8 2.7 3.3 4.0 4.5 5.1 5.7 5.6 5.6
TRANSP WIND DIR.NW NW NW N N NW NW NW N N N N
TRANSP WIND SPD.13 13 14 16 18 22 25 26 26 26 28 29
FORECASTER...JC
REQUESTED BY...TANNER SPRAGUE
TYPE OF REQUEST...WILDFIRE
.TAG 2618842.0/UNR
.DELDT 08/02/26
.FORMATTERVERSION 2.0.0
.EMAIL TANNER.SPRAGUE@USDA.GOV,BLACKHAWKVOLFD@GMAIL.COM
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