Spot Forecast
Issued by NWS Cheyenne, WY

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Spot Forecast for Rifle Site RX...Gering Fire Department
National Weather Service Cheyenne WY
228 PM MDT Mon Mar 18 2024

If conditions become unrepresentative, contact the National Weather
Service at (307) 772-2227

.DISCUSSION...

Quiet weather conditions expected on Wednesday as winds switch
from the east to southeast, and finally south by 1700. Wind gusts
of 10-12mph between 1200-1700. Smoke dispersal will transition to
good by the afternoon of Wednesday. Minimum humidity values will
decrease to near 30 percent on Wednesday. Good overnight humidity
recovery expected. Winds will be more gusty on Thursday, as peak
wind gusts of 30-35mph from the west will be present by 1200.
Humidity values will decrease to near 20 percent by 1500 Thursday,
causing elevated fire weather concerns due to possible rapid fire
spread conditions being favored. Wednesday would be better day to
consider for prescribed burn operations despite higher humidities.

.WEDNESDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
LAL.................1.
Max temperature.....Around 61-63.
Min humidity........30-33 percent.
Wind (20 ft)........South to Southeast winds 9 to 10 mph.
Mixing height.......9600 ft AGL.
Transport winds.....North 7 to 8 mph shifting to the west 7 to 9
                    mph late in the afternoon.
Smoke dispersal.....Poor (9600 knot-ft) early in the morning
                    increasing to good (72600 knot-ft) in the
                    afternoon.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........13  14  15  13  10  8   10  12
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1
Temp............43  47  51  54  57  60  60  61
RH..............57  51  44  40  37  33  33  31
20 FT wind dir..E   SE  SE  SE  S   S   S   S
20 FT wind spd..9   9   10  9   9   9   9   9
20 FT wind gust.10  10  12  10  10  10  10  10
Mix hgt (kft)...1.4 2.0 3.0 4.7 6.6 8.2 9.1 9.6
Transp wind dir.NE  N   NW  NW  W   W   W   W
Transp wind spd.8   7   6   7   7   7   8   9
Haines index....2   2   3   3   3   3   3   3
SDspl kt-ft/100010  12  17  26  39  52  64  73

.WEDNESDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent).
CWR.................1 percent.
LAL.................1.
Min temperature.....Around 36-38.
Max humidity........60-65 percent.
Wind (20 ft)........South winds 9 to 10 mph shifting to the
                    southwest around 9 mph after 3 am.
Mixing height.......800 ft AGL.
Transport winds.....West 7 to 9 mph shifting to the southwest 12 to
                    17 mph overnight.
Smoke dispersal.....Good (73300 knot-ft) early in the evening
                    decreasing to poor (9800 knot-ft) late in the
                    night.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........14  16  17  18  15  12  8   7   6   5   6   8
Weather cov.....
Weather type....
Tstm cov........
CWR.............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............61  58  54  51  49  48  46  44  42  40  40  40
RH..............31  34  40  44  48  49  53  55  60  62  59  59
20 FT wind dir..S   S   S   S   S   S   S   S   SW  SW  SW  SW
20 FT wind spd..9   9   9   9   9   10  10  9   9   9   9   9
20 FT wind gust.10  10  10  10  12  12  12  10  10  10  12  13
Mix hgt (kft)...9.4 8.5 7.0 5.4 3.9 2.5 1.5 1.0 0.9 0.9 0.8 0.8
Transp wind dir.W   W   W   W   W   SW  SW  SW  SW  SW  SW  W
Transp wind spd.9   8   7   7   8   9   12  12  13  14  15  17
Haines index....3   3   3   3   3   3   3   3   3   3   3   3
SDspl kt-ft/100073  61  45  33  27  21  15  11  10  11  11  12

.THURSDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................3 percent.
LAL.................1.
Max temperature.....Around 66-68.
Min humidity........20-23 percent.
Wind (20 ft)........Breezy. West winds 9 to 18 mph increasing to
                    northwest 22 to 28 mph with gusts to around 36
                    mph late in the morning.
Mixing height.......10300 ft AGL increasing to 11600 ft AGL late in
                    the afternoon.
Transport winds.....West 20 to 26 mph increasing to 30 to 38 mph in
                    the late morning and afternoon.
Smoke dispersal.....Poor (14900 knot-ft) early in the morning
                    increasing to very good (104100 knot-ft) in the
                    afternoon increasing to excellent (309600
                    knot-ft).
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10  11  12  13  18  22  27  33  38  44  49  53
Weather cov.....
Weather type....
Tstm cov........
CWR.............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............39  43  46  50  55  59  63  65  66  66  65  64
RH..............61  55  48  44  37  32  27  25  23  23  23  25
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   NW  NW
20 FT wind spd..9   10  14  16  18  22  24  26  28  28  28  26
20 FT wind gust.10  14  21  23  26  30  32  35  35  36  36  33
Mix hgt (kft)...0.9 0.8 0.8 1.6 3.8 6.6 9.0 10  11  12  12  12
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.20  23  26  30  31  32  32  35  36  38  38  38
Haines index....2   2   2   2   2   2   3   3   3   3   3   3
SDspl kt-ft/100016  15  19  42  104 183 256 310 350 373 382 376

$$
Forecaster...Wills
Requested by...Kelsey Brady
Type of request...PRESCRIBED
.TAG 2407359.0/CYS
.DELDT 03/18/24
.FormatterVersion 2.0.0
.EMAIL firedept@gering.org


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