389
FNUS73 KBIS 081036
FWSBIS

Spot Forecast for WWS...WFS
National Weather Service Bismarck ND
536 AM CDT Mon Jun 8 2026

Forecast is based on ignition time of 1100 CDT on June 08.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Overnight and early morning rain has ended. Mostly cloudy skies early
this morning, becoming mostly sunny by mid to late morning. Look for
northwest winds around 15 mph with gusts to 20 mph at ignition time,
diminishing to around 10 mph with gust to 15 by mid to late afternoon.
The forecast high is 78 degrees this afternoon with a minimum humidity
around 27 percent. Winds will diminish and shift to the east tonight.
Strong southeast winds develop by Tuesday afternoon. Scattered to
numerous thunderstorms, some severe, Tuesday night.

.REST OF TODAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...1 percent.
Max temperature.....Around 78.
Min humidity........27 percent.
Wind (20 ft)........Northwest winds 10 to 15 mph.
Mixing height.......4200 ft AGL.
Transport winds.....Northwest 12 to 20 mph.
Smoke dispersal.....Fair (41200 knot-ft).

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........37  39  42  41  41  26  12
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............68  71  73  75  76  77  78
RH..............53  46  38  34  32  30  28
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..15  14  13  12  11  10  9
20 FT wind gust.21  21  20  19  18  17  14
Mix hgt (kft)...2.4 2.8 3.1 3.6 4.0 4.2 4.1
Transp wind dir.NW  NW  NW  W   W   W   W
Transp wind spd.20  18  17  16  15  14  12
Dispr kt-ft/1K..42  44  46  51  52  50  41

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...1 percent.
Min temperature.....Around 55.
Max humidity........67 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph early in the evening
                    becoming light, then becoming east 5 to 10 mph
                    after 3 am.
Mixing height.......400 ft AGL.
Transport winds.....West 5 to 10 mph shifting to the southeast around
                    5 mph late in the evening, then increasing to 7
                    to 10 mph overnight.
Smoke dispersal.....Poor (1800 knot-ft).

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........13  14  17  20  23  22  21  20  23  23  23  30
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............78  77  75  69  64  63  61  60  59  59  58  58
RH..............27  28  32  42  48  50  53  55  57  57  62  62
20 FT wind dir..NW  NW  NW  NW  N   NE  SE  SE  SE  SE  E   E
20 FT wind spd..8   7   5   4   3   3   3   3   4   5   6   8
20 FT wind gust.14  11  8   5   5   5   5   5   6   7   9   12
Mix hgt (kft)...3.9 3.5 0.7 0.5 0.4 0.5 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.W   W   W   W   W   S   SE  SE  SE  E   SE  E
Transp wind spd.10  8   6   5   6   6   7   7   7   8   9   10
Dispr kt-ft/1K..35  25  4   2   2   2   3   2   2   3   3   4

.TUESDAY...

Sky/weather.........Mostly sunny. Increasing clouds with a chance
                    of thunderstorms late in the afternoon.
CWR.................3 percent increasing to 15 percent in the
                    afternoon.
Chance of pcpn......40 percent.
Chance of thunder...30 percent.
Max temperature.....Around 88.
Min humidity........46 percent.
Wind (20 ft)........Southeast winds 10 to 20 mph with gusts
                    to around 25 mph increasing to 20 to 30 mph
                    with gusts to around 40 mph in the late morning
                    and afternoon. Gusty and erratic winds expected
                    near thunderstorms late in the afternoon.
Mixing height.......5800 ft AGL.
Transport winds.....Southeast 13 to 21 mph increasing to south 32
                    to 33 mph.
Smoke dispersal.....Poor (4500 knot-ft) early in the morning
                    increasing to good (91900 knot-ft) in the
                    afternoon increasing to excellent
                    (162100 knot-ft) late in the afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........49  59  50  28  27  30  44  30  31  37  32  59
Weather cov.....                                        CHC CHC
Weather type....                                        RW  RW
Tstm cov........                                        CHC CHC
CWR.............0   0   0   0   0   0   0   70  70  70  70  70
Chc of pcpn (%).0   0   0   0   0   10  10  70  70  50  70  50
Chc of thdr (%).0   0   0   0   0   10  10  10  10  10  40  40
Temp............57  59  63  67  72  76  79  82  84  85  86  85
RH..............67  67  62  61  55  54  52  49  46  48  46  46
20 FT wind dir..E   SE  SE  SE  SE  SE  SE  SE  SE  SE  S   S
20 FT wind spd..10  12  14  17  20  22  23  24  25  27  28  27
20 FT wind gust.14  19  21  24  27  31  32  34  37  37  38  37
Mix hgt (kft)...0.4 0.5 0.8 1.6 2.0 2.7 2.9 3.7 5.2 5.8 5.2 3.2
Transp wind dir.E   SE  SE  SE  SE  SE  SE  SE  SE  SE  S   S
Transp wind spd.13  14  16  21  23  25  28  29  30  32  33  32
Dispr kt-ft/1K..5   5   11  28  41  60  71  92  135 162 151 89

$$
Forecaster...HAMILTON
Requested by...Terry Gwilliams
Type of request...PRESCRIBED
.TAG 2615150.0/BIS
.DELDT 06/08/26
.FormatterVersion 2.0.0
.EMAIL Terry_Gwilliams@fws.gov