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Spot Forecast
Issued by NWS Bismarck, ND
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FWSBIS

Spot Forecast for G2,G3,G4,B2...FWS
National Weather Service Bismarck ND
325 AM CDT Sat Apr 20 2024

Forecast is based on ignition time of 1100 CDT on April 20.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Mostly sunny but seasonably cool at the burn site today, with a high
temperature around 49 degrees and minimum relative humidity dropping
to around 29 percent. Northwest winds will become breezy by early
afternoon, sustained at 15 to 20 mph with gusts up to 25 mph. Winds
will drop off relatively quickly in the evening and overnight, becoming
a bit more westerly, with relative humidity recovering into the mid
60 percent range. Expect warmer conditions on Sunday, with a high
around 60 degrees and minimum relative humidity dropping into the
lower 20 percent range. There will be a wind shift on Sunday as well,
with winds starting as west-northwesterly in the morning before
shifting to southwesterly late in the afternoon.

.REST OF TODAY...

Sky/weather.........Sunny.
CWR.................0 percent.
Chance of pcpn......0 percent.
LAL.................1.
Max temperature.....Around 49.
Min humidity........29 percent.
Wind (20 ft)........Northwest winds 15 to 20 mph.
Mixing height.......5900 ft AGL.
Transport winds.....Northwest 20 to 25 mph.
Smoke dispersal.....Fair (59900 knot-ft) early in the morning
                    increasing to very good (123100 knot-ft) in the
                    afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5   16  8   4   3   4   6
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0
Chc of pcpn (%).0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1
Temp............37  39  43  46  47  48  49
RH..............52  46  36  31  31  30  29
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..16  16  17  17  18  18  18
20 FT wind gust.19  20  19  20  22  23  22
Mix hgt (kft)...3.2 3.8 4.3 4.8 5.3 5.8 5.9
Transp wind dir.NW  NW  NW  NW  NW  NW  NW
Transp wind spd.22  21  21  21  22  22  24
Haines index....4   4   5   5   4   4   4
Dispr kt-ft/1K..60  68  78  87  101 110 123

.TONIGHT...

Sky/weather.........Mostly clear.
CWR.................0 percent.
Chance of pcpn......0 percent.
LAL.................1.
Min temperature.....Around 30.
Max humidity........66 percent.
Wind (20 ft)........West winds 10 to 15 mph.
Mixing height.......400 ft AGL.
Transport winds.....West 14 to 23 mph.
Smoke dispersal.....Very good (119200 knot-ft) early in the evening
                    decreasing to good (97100 knot-ft) late in the
                    night decreasing to poor (5300 knot-ft) early
                    in the evening.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........8   8   21  29  18  15  10  7   6   8   7   6
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
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............48  47  45  40  38  36  35  33  33  32  31  30
RH..............30  34  38  48  52  56  56  58  61  61  66  66
20 FT wind dir..NW  NW  NW  W   W   W   W   W   W   W   W   W
20 FT wind spd..15  15  12  10  10  11  11  10  11  11  11  11
20 FT wind gust.20  19  18  14  14  15  15  15  15  15  15  17
Mix hgt (kft)...6.0 5.1 1.1 0.8 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.NW  NW  NW  W   W   W   W   W   W   W   W   W
Transp wind spd.23  22  16  15  14  15  16  15  16  15  15  16
Haines index....4   4   4   4   4   4   4   4   4   5   5   5
Dispr kt-ft/1K..119 97  15  10  6   5   6   5   6   6   6   6

.SUNDAY...

Sky/weather.........Sunny.
CWR.................0 percent.
Chance of pcpn......0 percent.
LAL.................1.
Max temperature.....Around 60.
Min humidity........22 percent.
Wind (20 ft)........West winds 9 to 11 mph shifting to the
                    southwest around 9 mph late in the afternoon.
Mixing height.......5300 ft AGL.
Transport winds.....West 14 to 18 mph.
Smoke dispersal.....Poor (5100 knot-ft) early in the morning
                    increasing to good (71300 knot-ft) in the
                    afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........5         4         4         5
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
CWR.............0         0         0         0
Chc of pcpn (%).0         0         0         0
LAL.............1         1         1         1
Temp............30        37        52        58
RH..............66        54        30        23
20 FT wind......W 10G15   W 11G15   W 9G14    W 9G13
Mix hgt (ft)....400       1100      3400      4900
Transport wind..W 16      W 15      W 18      W 15
Haines index....5         5         5         4
Dispr kt-ft/1K..6         14        53        65

$$
Forecaster...JONES
Requested by...Terry Gwilliams
Type of request...PRESCRIBED
.TAG 2411432.0/BIS
.DELDT 04/20/24
.FormatterVersion 2.0.0
.EMAIL Terry_Gwilliams@fws.gov
National Weather Service Weather Forecast Office
