546
FNUS73 KBIS 211140
FWSBIS

Spot Forecast for Dam 41...US FWS
National Weather Service Bismarck ND
640 AM CDT Tue May 21 2024

Forecast is based on ignition time of 1100 CDT on May 21.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Mostly cloudy skies are expected at the burn site today, with
west to northwest winds. Minimum relative humidity values are expected
to dip to around 37 percent. A light rain shower is possible in the
afternoon. Variable and gusty winds will be possible around any rain
shower.

Mostly sunny and quiet weather is expected at the burn site on
Wednesday, with minimum humidity values dipping into the upper 30s
and a northwest wind becoming northerly in the late afternoon.

.TODAY...
Sky/weather.........Partly sunny. Slight chance of rain showers
                    in the afternoon.
CWR.................5 percent.
Chance of pcpn......20 percent.
LAL.................1.
Max temperature.....Around 66.
Min humidity........37 percent.
Wind (20 ft)........West winds 7 to 12 mph shifting to the
                    northwest 10 to 13 mph late in the afternoon.
Mixing height.......7200 ft AGL.
Transport winds.....West 12 to 16 mph.
Smoke dispersal.....Poor early in the morning
                    increasing to very good in the
                    afternoon.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........47  50  54  58  58  59  60  58
Weather cov.....                    SCH SCH SCH
Weather type....                    RW  RW  RW
CWR.............0   0   0   0   0   5   5   5
Chc of pcpn (%).0   0   0   0   0   20  20  20
LAL.............1   1   1   1   1   1   1   1
Temp............56  59  60  62  64  65  66  64
RH..............62  53  49  45  42  40  37  38
20 FT wind dir..W   W   W   W   W   W   WNW NW
20 FT wind spd..5   7   9   11  11  11  12  13
20 FT wind gust.9   11  12  14  14  14  15  17
Mix hgt (kft)...2.9 5.0 6.3 7.0 7.2 6.5 6.4 6.7
Transp wind dir.W   W   W   W   W   W   W   W
Transp wind spd.12  12  13  14  15  15  16  18
Haines index....5   5   5   5   5   5   5   5


.TONIGHT...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
CWR.................0 percent.
Chance of pcpn......0 percent.
LAL.................1.
Min temperature.....Around 37.
Max humidity........100 percent.
Wind (20 ft)........Northwest winds 5 to 12 mph.
Mixing height.......400 ft AGL.
Transport winds.....Northwest 10 to 17 mph.
Smoke dispersal.....Good (98100 knot-ft) early in the evening
                    decreasing to poor (3800 knot-ft) late in the
                    night.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

.WEDNESDAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
Chance of pcpn......10 percent.
LAL.................1.
Max temperature.....Around 63.
Min humidity........39 percent.
Wind (20 ft)........Northwest winds 6 to 9 mph shifting to the
                    north around 8 to 11 mph late in the afternoon.
Mixing height.......5600 ft AGL.
Transport winds.....Northwest 12 to 15 mph.
Smoke dispersal.....Good.
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.

$$
Forecaster...SCHILD
Requested by...Calvin
Type of request...PRESCRIBED
.TAG 2414810.0/BIS
.DELDT 05/21/24
.FormatterVersion 2.0.0
.EMAIL calvin_moldenhauer@fws.goc