420
FNUS73 KBIS 101000
FWSBIS
SPOT FORECAST FOR GLT-A...USFWS
NATIONAL WEATHER SERVICE BISMARCK ND
500 AM CDT SUN MAY 10 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON MAY 10.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY EVENING...
DISCUSSION
PLENTIFUL SUNSHINE IS EXPECTED TODAY, WITH VERY LIGHT WIND AND A
HIGH TEMPERATURE AROUND 60 DEGREES. RELATIVE HUMIDITY WILL FALL
FROM AROUND 45 PERCENT AT 11 AM TO NEAR 20 PERCENT IN THE LATE
AFTERNOON. SOUTHEAST WINDS WILL BEGIN TO INCREASE LATE THIS
EVENING THROUGH TONIGHT.
CRITICAL FIRE WEATHER CONDITIONS ARE POSSIBLE ON MONDAY, WITH
STRONG SOUTHERLY WINDS SHIFTING TO THE NORTHWEST LATE IN THE DAY
AS A COLD FRONT MOVES THROUGH. A FEW SHOWERS OR THUNDERSTORMS
CAPABLE OF STRONG, ERRATIC WIND GUSTS COULD ALSO DEVELOP MONDAY
AFTERNOON.
REST OF TODAY
SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 60.
MIN HUMIDITY........22 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS.
MIXING HEIGHT.......6200 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 5 TO 10 MPH.
SMOKE DISPERSAL.....POOR (24300 KNOT-FT) LATE IN THE MORNING
INCREASING TO FAIR (43600 KNOT-FT) IN THE
AFTERNOON.
TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........2 2 5 7 2 2 18
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............48 51 53 55 57 59 59
RH..............46 37 33 29 25 23 22
20 FT WIND DIR..SW NW NW NW NW N N
20 FT WIND SPD..2 2 2 2 2 2 2
20 FT WIND GUST.5 5 5 6 6 6 5
MIX HGT (KFT)...4.1 4.8 5.5 6.0 6.1 6.2 6.2
TRANSP WIND DIR.NW NW NW NW NW NW NW
TRANSP WIND SPD.7 7 8 8 8 8 8
DISPR KT-FT/1K..24 29 39 42 43 44 43
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 38.
MAX HUMIDITY........62 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS EARLY IN THE EVENING,
BECOMING SOUTHEAST AROUND 10 TO 15 MPH LATE IN
THE EVENING THROUGH THE NIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....WEST AROUND 8 MPH EARLY IN THE EVENING, SHIFTING
TO THE SOUTHEAST AND INCREASING TO AROUND 12 TO
17 MPH LATE IN THE EVENING THROUGH THE NIGHT.
SMOKE DISPERSAL.....FAIR (42900 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3500 KNOT-FT) OVERNIGHT.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........19 17 18 13 11 30 33 32 30 33 41 50
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............59 59 57 50 46 44 43 42 41 41 40 40
RH..............22 22 23 29 37 47 53 55 59 59 62 62
20 FT WIND DIR..N E E E SE SE SE SE SE SE SE SE
20 FT WIND SPD..3 4 5 7 9 10 11 13 13 14 14 15
20 FT WIND GUST.5 6 8 11 14 15 18 20 20 21 22 22
MIX HGT (KFT)...6.1 5.7 3.8 0.5 0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W W S SE SE SE SE SE S S S S
TRANSP WIND SPD.8 8 8 10 12 14 15 15 17 17 17 17
DISPR KT-FT/1K..43 40 27 4 4 5 5 5 7 8 8 8
MONDAY
SKY/WEATHER.........PARTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
CWR.................5 PERCENT.
CHANCE OF PCPN......20 PERCENT.
CHANCE OF THUNDER...15 PERCENT.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........30 PERCENT.
WIND (20 FT)........SOUTH-SOUTHEAST WINDS AROUND 15 TO 20 MPH
EARLY IN THE MORNING, INCREASING TO AROUND
20 TO 25 MPH WITH GUSTS TO NEAR 35 MPH IN
THE LATE MORNING AND AFTERNOON, SHIFTING TO
THE WEST LATE IN THE AFTERNOON. GUSTY AND
ERRATIC WINDS NEAR SHOWERS AND THUNDERSTORMS.
MIXING HEIGHT.......8200 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 15 TO 20 MPH EARLY IN THE
MORNING, SHIFTING TO THE SOUTH AND INCREASING
TO AROUND 25 TO 30 MPH IN THE LATE MORNING AND
EARLY AFTERNOON, THEN SHIFTING TO THE WEST
AROUND 30 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (7300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (197500 KNOT-FT) IN
THE AFTERNOON.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........64 77 76 66 71 57 60 32 44 35 42 52
WEATHER COV..... SCH SCH SCH SCH SCH
WEATHER TYPE.... RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH
CWR.............0 0 0 0 0 0 0 10 10 10 10 10
CHC OF PCPN (%).0 0 0 0 0 0 0 20 20 20 20 20
CHC OF THDR (%).0 0 0 0 0 0 0 20 20 20 20 20
TEMP............40 41 45 51 56 61 64 67 70 73 76 76
RH..............62 62 58 48 42 36 35 33 32 31 30 31
20 FT WIND DIR..SE SE SE SE SE S S S S S SW SW
20 FT WIND SPD..15 16 17 19 21 22 23 23 22 20 18 21
20 FT WIND GUST.24 25 26 28 31 31 33 33 31 30 28 30
MIX HGT (KFT)...0.5 0.5 1.1 1.4 1.8 2.1 2.5 3.0 5.7 7.9 7.0 8.2
TRANSP WIND DIR.SE SE S S S S S S S SW SW W
TRANSP WIND SPD.17 18 21 23 25 26 28 30 28 29 31 28
DISPR KT-FT/1K..7 8 20 28 39 49 60 79 137 198 189 197
FORECASTER...HOLLAN
REQUESTED BY...D.MARSDEN
TYPE OF REQUEST...PRESCRIBED
.TAG 2613222.0/BIS
.DELDT 05/10/26
.FORMATTERVERSION 2.0.0
.EMAIL DOMINIC_MARSDEN@FWS.GOV
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