535
FNUS73 KBIS 110333
FWSBIS
SPOT FORECAST FOR WILLISTON CHEM FIRE...FIRE DEPARTMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1033 PM CDT SUN MAY 10 2026
FORECAST IS BASED ON FORECAST START TIME OF 2300 CDT ON MAY 10.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
INCREASING CLOUD COVER IS EXPECTED OVER THE BURN AREA OVERNIGHT.
MIXING HEIGHTS AROUND 500 FT AGL ARE EXPECTED. POOR (6700 KNOT-FT)
SMOKE DISPERSAL IS EXPECTED. BREEZY EAST-SOUTHEAST WINDS AROUND 14
TO 18 MPH THIS EVENING WILL TURN TURN SOUTHERLY OVERNIGHT THROUGH
EARLY MONDAY MORNING, WITH ISOLATED GUSTS UP TO 30 MPH POSSIBLE.
DECREASING CLOUD COVER IS THEN EXPECTED THROUGH MONDAY MORNING
AND AFTERNOON. THE MIXING HEIGHT IS EXPECTED TO INCREASE THROUGH
THE MORNING AND AFTERNOON, TO A MAX OF AROUND 10800 FT AGL. POOR
(7800 KNOT-FT) SMOKE DISPERSAL EARLY IN THE MORNING IS EXPECTED
INCREASE THROUGH THE MORNING AND AFTERNOON, BECOMING EXCELLENT
(277000 KNOT-FT). BREEZY SOUTH WINDS WILL STRENGTHEN THROUGH THE
MORNING AND AFTERNOON, BECOMING WINDY FROM 25 TO 30 MPH AND
GUSTING UP TO 45 MPH AS A COLD FRONT MOVES ACROSS THE FORECAST
AREA.
REST OF TONIGHT
SKY/WEATHER.........BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 47.
MAX HUMIDITY........56 PERCENT.
WIND (20 FT)........EAST-SOUTHEAST WINDS 14 TO 18 MPH SHIFTING
TO THE SOUTH AROUND 16 MPH OVERNIGHT. GUSTS
UP TO 30 MPH POSSIBLE EARLY TONIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 15 TO 17 MPH.
SMOKE DISPERSAL.....POOR (6700 KNOT-FT).
TIME (CDT) 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........55 55 63 61 86 85 80
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0
TEMP............54 52 52 54 53 52 52
RH..............34 36 39 41 45 50 52
20 FT WIND DIR..SE SE SE SE SE SE S
20 FT WIND SPD..13 14 14 15 14 14 14
20 FT WIND GUST.20 22 25 28 24 22 22
MIX HGT (KFT)...0.5 0.5 0.5 0.5 0.6 0.6 0.6
TRANSP WIND DIR.SE SE SE SE S S S
TRANSP WIND SPD.15 16 17 17 16 17 16
DISPR KT-FT/1K..7 7 8 8 8 9 8
MONDAY
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
CWR.................1 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 83.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........BREEZY. SOUTH WINDS 15 TO 20 MPH WITH GUSTS TO
AROUND 30 MPH IN THE MORNING SHIFTING THE WEST
25 TO 30 MPH GUSTING TO 40 TO 45 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......INCREASING TO 10800 FT AGL LATE IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH SHIFTING TO THE WEST 22 TO
32 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (7800 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (277000 KNOT-FT).
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........86 73 65 64 67 67 50 50 49 33 27 29
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............51 51 54 58 63 69 73 77 79 81 81 81
RH..............54 56 52 47 41 35 31 26 24 21 20 19
20 FT WIND DIR..S SE S S S S SW W W W W NW
20 FT WIND SPD..14 14 15 15 16 16 16 16 20 23 26 27
20 FT WIND GUST.21 21 22 22 24 25 25 25 30 34 37 38
MIX HGT (KFT)...0.6 0.6 0.7 1.1 1.3 1.7 2.9 5.0 6.8 9.1 10 11
TRANSP WIND DIR.S S S S S S SW W W W W W
TRANSP WIND SPD.16 16 17 20 20 20 20 22 25 29 31 32
DISPR KT-FT/1K..8 8 11 19 22 30 50 94 150 228 277 303
FORECASTER...ADAM
REQUESTED BY...MIKE SMITH
TYPE OF REQUEST...WILDFIRE
.TAG 2613294.0/BIS
.DELDT 05/10/26
.FORMATTERVERSION 2.0.0
.EMAIL MIKESM@CO.WILLIAMS.ND.US,STEVEOROBLES@GMAIL.COM
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