046
FNUS73 KBIS 011128
FWSBIS
SPOT FORECAST FOR GRASSLAND TRAIL A...USWFS
NATIONAL WEATHER SERVICE BISMARCK ND
628 AM CDT MON JUN 1 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON JUNE 01.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
QUIET WEATHER IS EXPECTED AT THE BURN SITE TODAY, AS TEMPERATURES CLIMB
INTO THE MID 70S AND MINIMUM HUMIDITY VALUES DIP TO AROUND 34 PERCENT. WINDS
WILL BE SOUTHWEST AT 11 TO 13 MPH WITH AN OCCASIONAL GUST TO 20 MPH. TONIGHT
STARTS OUT QUIET, BUT SOUTHWEST WINDS WILL BE SWITCHING SOUTHEAST IN THE EVENING.
RAIN SHOWER CHANCES THEN DEVELOP LATE, WITH POSSIBLY A THUNDERSTORM. ON TUESDAY
EXPECT RAIN SHOWERS AT THE BURN SITE ALONG WITH SOME THUNDERSTORMS.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...2 PERCENT.
MAX TEMPERATURE.....AROUND 75.
MIN HUMIDITY........34 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 11 TO 13 MPH WITH GUSTS TO
AROUND 20 MPH.
MIXING HEIGHT.......5700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 18 TO 22 MPH.
SMOKE DISPERSAL.....FAIR EARLY IN THE MORNING INCREASING TO VERY GOOD IN THE
AFTERNOON.
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........54 36 18 16 13 15 20
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............65 67 68 70 71 73 73
RH..............56 50 47 42 37 36 34
20 FT WIND DIR..SW SW SW SW SW SW SW
20 FT WIND SPD..11 12 13 13 13 13 12
20 FT WIND GUST.18 19 20 20 20 20 20
MIX HGT (KFT)...3.1 3.6 4.1 4.6 4.7 5.2 5.7
TRANSP WIND DIR.S S S SW SW SW SW
TRANSP WIND SPD.18 20 20 21 20 22 22
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. CHANCE OF
SHOWERS, POSSIBLY A THUNDERSTORM, AFTER 3 AM.
CWR.................5 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...10 PERCENT.
MIN TEMPERATURE.....AROUND 51.
MAX HUMIDITY........80 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 11 MPH SHIFTING TO THE
SOUTHEAST 5 TO 9 MPH IN THE LATE EVENING AND
OVERNIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 14 TO 20 MPH SHIFTING TO THE
SOUTHEAST 8 TO 14 MPH IN THE LATE EVENING AND
OVERNIGHT.
SMOKE DISPERSAL.....GOOD EARLY IN THE EVENING DECREASING TO POOR LATE IN THE
NIGHT.
TUESDAY
SKY/WEATHER.........MOSTLY CLOUDY. RAIN SHOWERS WITH A CHANCE OF THUNDERSTORMS.
CWR.................60.
CHANCE OF PCPN......80 PERCENT.
CHANCE OF THUNDER...40 PERCENT.
MAX TEMPERATURE.....AROUND 77.
MIN HUMIDITY........57 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 9 TO 15 MPH WITH GUSTS TO
AROUND 24 MPH SHIFTING TO THE SOUTH 13 TO 17
MPH WITH GUSTS TO AROUND 26 MPH IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS.
MIXING HEIGHT.......3900 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 14 TO 23 MPH SHIFTING TO THE SOUTH 20
TO 24 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD.
FORECASTER...SCHILD
REQUESTED BY...JASON WAGNER
TYPE OF REQUEST...PRESCRIBED
.TAG 2614739.0/BIS
.DELDT 06/01/26
.FORMATTERVERSION 2.0.0
.EMAIL JASON_WAGNER@FWS.GOV
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