Spot Forecast
Issued by NWS Bismarck, ND
Issued by NWS Bismarck, ND
660
FNUS73 KBIS 141249
FWSBIS
Spot Forecast for South Achenbach...USWFS
National Weather Service Bismarck ND
749 AM CDT Mon Sep 14 2026
Forecast is based on forecast start time of 0800 CDT on September 14.
If conditions become unrepresentative, contact the National Weather
Service.
...HIGH WIND WARNING IN EFFECT FROM NOON TODAY TO MIDNIGHT CDT
TONIGHT...
.DISCUSSION...
Strong winds will be found across the fire area today through this evening.
This morning, a round of showers and thunderstorms could bring some wetting
rains to the fire area. Shower activity moves north and east by this afternoon,
with cloud cover diminishing across the fire area. Breezy southerly winds will
shift to the west by late this morning. Strong west winds are then expected this
afternoon into this evening, with winds 25 to 35 mph and gusts approaching 50 mph.
Winds are then expected to diminish to around 10 to 20 mph after 0000 local time tonight.
Look for varying clouds with high humidity recoveries as well tonight. Tuesday will see
dry conditions with northwest winds 10 to 15 mph, diminishing to around 5 mph late in the day.
Minimum humidity values today and Tuesday will be around 40 percent.
.REST OF TODAY...
Sky/weather.........Mostly cloudy then gradually becoming partly cloudy
in the afternoon. Rain showers and chance of thunderstorms
in the morning.
CWR.................85 percent in the morning.
Less than 10 percent in the afternoon.
Chance of pcpn......100 percent.
Chance of thunder...40 percent.
Max temperature.....Around 68.
Min humidity........44 percent.
Wind (20 ft)........Windy. South southeast winds around 6 mph shifting to the
southwest 6 to 15 mph with gusts to around 22
mph late in the morning, then increasing to
west 25 to 35 mph with gusts to around 48 mph
in the afternoon. Gusty and erratic winds
expected near thunderstorms early in the morning.
Mixing height.......7000 ft AGL.
Transport winds.....South 10 to 20 mph shifting to the west 20 to
30 mph late in the morning, then increasing to
35 to 45 mph in the afternoon with gusts near 50 mph.
Smoke dispersal.....Poor (10600 knot-ft) early in the morning
increasing to good (86200 knot-ft) in the
afternoon increasing to excellent (240100
knot-ft).
TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........100 93 82 71 73 71 64 45 23 38
Weather cov.....DEF DEF LKY SCH
Weather type....RW RW RW RW
Tstm cov........CHC CHC
CWR.............80 80 50 50 50 0 0 0 0 0
Chc of pcpn (%).100 80 60 20 10 0 0 0 0 0
Chc of thdr (%).40 30 20 10 10 0 0 0 0 0
Temp............57 59 62 62 61 62 63 63 62 61
RH..............83 80 75 74 75 62 54 50 48 48
20 FT wind dir..S SW SW W W W W W W W
20 FT wind spd..6 6 6 13 24 26 27 27 28 30
20 FT wind gust.13 13 14 22 37 38 40 41 42 44
Mix hgt (kft)...0.7 1.1 1.4 1.8 3.0 4.4 5.4 6.3 6.9 7.0
Transp wind dir.S SW W W W W W W W W
Transp wind spd.17 18 21 25 33 37 40 41 40 43
Dispr kt-ft/1K..11 18 26 39 86 139 190 225 240 259
.TONIGHT...
Sky/weather.........Partly cloudy to mostly cloudy.
CWR.................2 percent.
Chance of pcpn......10 percent.
Chance of thunder...0 percent.
Min temperature.....Around 45.
Max humidity........95 percent.
Wind (20 ft)........Windy. West winds 25 to 35 mph with gusts to
around 48 mph in the evening, decreasing to
12 to 22 mph with gusts to around 30 mph overnight.
Mixing height.......500 ft AGL.
Transport winds.....West 35 to 45 mph with gusts near 50 mph in the evening
becoming northwest 15 to 25 mph with gusts near 30 mph.
Smoke dispersal.....Excellent (189700 knot-ft) decreasing to good
(98900 knot-ft) early in the evening decreasing
to poor (7700 knot-ft) late in the night early
in the evening.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........24 30 77 74 60 54 40 49 27 32 32 31
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 10 0 10 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............61 62 59 56 54 53 53 52 51 51 50 49
RH..............50 44 55 64 71 74 74 77 83 86 89 93
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..30 29 30 30 28 26 23 20 18 16 15 14
20 FT wind gust.45 44 47 46 42 38 34 31 28 26 24 21
Mix hgt (kft)...6.2 5.6 3.2 1.4 0.5 2.1 0.8 0.8 0.5 0.5 0.7 0.5
Transp wind dir.W W W W W W W W W W NW NW
Transp wind spd.43 39 36 36 33 31 28 23 21 21 20 18
Dispr kt-ft/1K..228 190 99 44 15 56 20 16 8 10 12 8
.TUESDAY...
Sky/weather.........Mostly to partly sunny.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 67.
Min humidity........38 percent.
Wind (20 ft)........Northwest winds 10 to 15 mph with gusts to
around 20 mph shifting to the north around 5
mph late in the afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....Northwest 10 to 20 mph decreasing to around 8
mph late in the afternoon.
Smoke dispersal.....Poor (11300 knot-ft) early in the morning
increasing to fair (52800 knot-ft) in the
afternoon.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........53 55 72 56 59 48 31 20 22 20 17 28
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............48 48 47 50 52 55 58 61 63 63 61 61
RH..............93 93 93 86 77 69 60 51 44 44 50 48
20 FT wind dir..W W W NW NW NW NW NW NW NW NW N
20 FT wind spd..12 11 10 11 11 10 10 9 8 7 5 5
20 FT wind gust.20 19 18 18 18 17 15 15 14 13 11 10
Mix hgt (kft)...0.7 0.8 1.8 2.4 2.9 3.4 4.0 4.7 4.8 4.8 5.0 4.1
Transp wind dir.NW NW NW NW NW NW NW NW NW NW NW NW
Transp wind spd.18 18 17 18 18 16 14 13 13 10 8 8
Dispr kt-ft/1K..11 13 27 39 47 48 48 51 53 43 35 29
$$
Forecaster...ANGLIN
Requested by...Jared Harrington
Type of request...WILDFIRE
.TAG 2621814.0/BIS
.DELDT 09/14/26
.FormatterVersion 2.0.0
.EMAIL jharritoe@gmail.com