451
FNUS73 KBIS 282051
FWSBIS

Spot Forecast for Castle Rock...USFS
National Weather Service Bismarck ND
351 PM CDT Thu May 28 2026

Forecast is based on forecast start time of 1600 MDT on May 28.
If conditions become unrepresentative, contact the National Weather
Service.

...RED FLAG WARNING IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.DISCUSSION...

The rest of this evening winds will continue from the south
at 25 mph, gusting over 40mph. Relative humidity will slowly
start to increasing late this evening to around 50 percent
overnight. Low temperatures tonight will drop to 61 degrees.
Winds will decrease to 16mph gusting near 25mph from the southeast.
Friday will be breezy again with southeast winds 20 mph, gusting near
30mph again. High temperatures will be slightly cooler at 86 degrees,
resulting in an afternoon relative humidity of 29 percent.

.TONIGHT...

Sky/weather.........Mostly cloudy.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 61.
Max humidity........60 percent.
Wind (20 ft)........Southeast winds 16 mph with gusts to
                    around 32 mph.
Mixing height.......700 ft AGL.
Transport winds.....South 22 to 31 mph decreasing to around 21 mph
                    early in the morning.
Smoke dispersal.....Excellent (167500 knot-ft) decreasing
                    to poor (13000 knot-ft) late in the night.

TIME (MDT)      5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM
Sky (%).........73  72  73  79  80  87  80  82  83  72  75  68
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............88  87  87  83  79  75  74  73  71  70  67  66
RH..............24  24  24  28  35  40  41  41  44  46  50  52
20 FT wind dir..S   S   SE  SE  SE  SE  SE  SE  SE  S   S   S
20 FT wind spd..23  22  19  18  17  17  16  16  16  16  16  16
20 FT wind gust.32  31  30  27  26  26  26  25  25  25  25  25
Mix hgt (kft)...7.5 7.0 3.6 1.2 0.7 0.7 0.8 0.8 0.8 0.9 0.9 1.0
Transp wind dir.S   S   S   SE  SE  S   S   S   S   S   S   S
Transp wind spd.31  28  28  23  22  22  22  22  23  22  22  21
Dispr kt-ft/1K..201 168 88  23  13  13  15  16  17  17  17  18

.FRIDAY...

Sky/weather.........Mostly sunny.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 87.
Min humidity........30 percent.
Wind (20 ft)........Southeast winds 20 mph with gusts to
                    around 30 mph.
Mixing height.......6000 ft AGL.
Transport winds.....Southeast 21 to 29 mph.
Smoke dispersal.....Poor (14800 knot-ft) early in the morning
                    increasing to very good (107800 knot-ft) in the
                    afternoon.

TIME (MDT)      5AM 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM
Sky (%).........68  56  58  45  35  29  27  22  26  29  28  35
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............65  64  66  69  74  78  81  82  84  86  86  86
RH..............54  60  58  53  44  40  38  35  34  31  31  31
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..16  15  16  18  19  20  21  20  20  19  19  19
20 FT wind gust.25  24  26  26  26  27  28  28  28  30  27  26
Mix hgt (kft)...0.8 0.9 1.6 2.3 2.9 3.6 4.5 4.9 5.7 6.0 5.9 5.1
Transp wind dir.S   SE  S   SE  SE  SE  SE  SE  S   SE  SE  SE
Transp wind spd.22  21  25  28  28  29  28  28  28  28  28  29
Dispr kt-ft/1K..15  16  36  55  69  90  108 117 136 144 142 127

$$
Forecaster...SMITH
Requested by...Dawson Glock
Type of request...WILDFIRE
.TAG 2614616.0/BIS
.DELDT 05/28/26
.FormatterVersion 2.0.0
.EMAIL dawson.glock@gmail.com