833
FNUS75 KRIW 262229
FWSRIW

Spot Forecast for Clearwater Fire...USFS
National Weather Service Riverton WY
429 PM MDT Fri Jul 26 2024

Forecast is based on forecast start time of 0600 MDT on July 27.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Scattered rain showers and thunderstorms will continue into the
evening hours today, but will dissipate overnight. A small weather
system will move through the area Saturday morning, which will
bring some rain to portions of the area. Currently, this area of
rain is expected to be southeast of the fire, but convective
development will occur in the afternoon. The CWR remains very low
(up to 10%) and would only occur if a stronger thunderstorm moves
directly over the fire. RH will drop to as low as 20% Saturday
afternoon. Wind will preodminantly be from the west/southwest on
Saturday, with gusts as high as 30 mph from the general flow.
Stronger gusts up to 50 mph will occur with thunderstorms.

...Thunderstorms imply strong gusty and erratic winds...
...Haines index is high level haines both day and night...

.SATURDAY...

Sky/weather.........Partly sunny (35-45 percent) then becoming
                    mostly cloudy (70-80 percent). Areas of smoke
                    through the day. Isolated to scattered
                    showers and thunderstorms late in the
                    afternoon.
CWR.................1 percent.
Chance of pcpn......30 percent.
LAL.................1 until 1600, then 3.
Max temperature.....Around 78.
Min humidity........21 percent.
Wind (20 ft)........Light winds until 0700, then west 7 to 12 mph
                    with gusts to around 16 mph until 1700, then
                    south around 19 mph with gusts to around 26
                    mph. Gusty and erratic winds expected near
                    thunderstorms late in the afternoon.
Ridgetop wind.......West 15 to 20 mph until 1700, then south around
                    30 mph.
Mixing height.......2000 ft AGL until 0900, then 8000 ft AGL until 1100,
                    then 10000 ft AGL until 1200, then 13500 ft AGL until
                    1600, then 9000 ft AGL.
Transport winds.....West 13 to 22 mph until 1700, then southwest
                    around 29 mph.
Smoke dispersal.....Poor until 0900. Excellent after 1100.
Haines Index........5.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........25  25  30  35  40  50  70  70  80  75  75  65
Weather cov.....ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS SCT
Weather type....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK RW
Tstm cov........                                        ISO SCT
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Chc of pcpn (%).0   0   0   0   0   0   10  10  10  10  20  30
LAL.............1   1   1   1   1   1   1   1   1   3   3   3
Temp............53  54  59  64  69  74  77  76  77  76  74  73
RH..............48  47  44  39  33  25  21  22  21  25  30  31
20 FT wind dir..W   W   W   NW  W   W   W   W   W   W   NW  S
20 FT wind spd..6   7   7   8   10  11  11  11  11  11  11  19
20 FT wind gust.10  10  10  11  14  14  16  16  16  14  14  26
Ridge wind dir..W   W   W   NW  W   W   W   W   W   W   NW  S
Ridge wind spd..15  15  15  15  15  20  20  20  20  20  20  30
Mix hgt (kft)...2.0 2.0 2.0 4.0 8.0 10  13  13  14  13  12  9.0
Transp wind dir.W   W   W   W   W   W   W   SW  SW  W   W   SW
Transp wind spd.13  14  14  16  21  22  21  18  18  18  18  29
Haines index....5   5   5   5   5   5   5   5   5   5   5   5
SDspl kt-ft/100020  22  26  57  144 194 222 204 217 206 187 229

.SATURDAY NIGHT...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    partly cloudy (30-40 percent) after midnight. Areas
                    of smoke through the night. Scattered rain showers
                    in the evening. Isolated rain showers and
                    thunderstorms through the night.
CWR.................10 percent decreasing to 0 percent overnight.
Chance of pcpn......30 percent.
LAL.................2 until 2100, then 1 until 2400, then 2 until
                    0100, then 1.
Min temperature.....Around 52.
Max humidity........66 percent.
Wind (20 ft)........South winds around 9 mph with gusts to around
                    14 mph until 1900, then west around 8 mph with
                    gusts to around 13 mph until 2200, then light
                    Gusty and erratic winds expected near
                    thunderstorms early in the evening. Gusty and
                    erratic winds expected near thunderstorms
                    overnight.
Ridgetop wind.......South around 15 mph until 1900, then west.
Mixing height.......7500 ft AGL until 1900. 2000 ft AGL after 2100.
Transport winds.....West 10 to 16 mph.
Smoke dispersal.....Very good until 1900. Poor after 2100.
Haines Index........3.

TIME (MDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........65  70  70  70  70  65  65  55  45  35  30  25
Weather cov.....ARS ARS ARS SCT ARS ARS ARS ARS ARS ARS ARS ARS
Weather type....SMK SMK SMK RW  SMK SMK SMK SMK SMK SMK SMK SMK
Tstm cov........ISO ISO ISO             ISO
CWR.............10  10  10  10  10  10  0   0   0   0   0   0
Chc of pcpn (%).20  20  20  30  20  20  20  10  10  10  10  10
LAL.............2   2   2   1   1   1   2   2   2   1   1   1
Temp............73  72  69  66  63  61  57  55  54  52  52  53
RH..............33  32  40  44  51  57  62  65  66  66  66  63
20 FT wind dir..S   W   W   W   W   NW  SW  SW  W   W   W   W
20 FT wind spd..9   8   8   8   6   8   7   5   6   6   7   7
20 FT wind gust.14  13  11  11  8   12  10  6       7   8   8
Ridge wind dir..S   W   W   W   W   NW  SW  SW  W   W   W   W
Ridge wind spd..15  15  15  15  15  15  15  10  10  15  15  15
Mix hgt (kft)...7.5 4.5 3.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
Transp wind dir.SW  W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.16  15  15  15  13  15  14  10  12  13  14  14
Haines index....3   3   3   3   3   3   3   3   3   3   3   3
SDspl kt-ft/1000108 55  38  25  21  25  22  17  19  21  22  22

.SUNDAY...

Sky/weather.........Partly sunny (30-40 percent). Rain showers
                    likely and chance of thunderstorms in the
                    afternoon.
CWR.................1 percent increasing to 26 percent in the
                    afternoon.
Chance of pcpn......60 percent.
LAL.................1 until 1200, then 3 until 1500, then 4.
Max temperature.....Around 77.
Min humidity........23 percent.
Wind (20 ft)........Light winds until 0900, then west 7 to 13 mph
                    with gusts to around 23 mph. Gusty and erratic
                    winds expected near thunderstorms in the
                    afternoon.
Ridgetop wind.......West 10 to 15 mph until 1100, then around 20
                    mph.
Mixing height.......3500 ft AGL until 0900. 11000 ft AGL after
                    1200.
Transport winds.....West 10 to 18 mph until 1200, then 20 to 21
                    mph.
Smoke dispersal.....Poor until 0700. Excellent after 1300.
Haines Index........3 to 4.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........15  20  20  25  30  35  40  45  50  55  45  40
Weather cov.....                        LKY LKY LKY LKY LKY LKY
Weather type....                        RW  RW  RW  RW  RW  RW
Tstm cov........                        CHC CHC CHC CHC CHC CHC
CWR.............0   0   0   0   0   0   30  30  30  30  30  30
Chc of pcpn (%).10  10  10  10  10  10  60  60  60  60  60  60
LAL.............1   1   1   1   1   1   3   3   3   4   4   4
Temp............54  56  58  61  65  69  73  75  76  76  76  75
RH..............60  57  53  48  41  34  28  25  24  24  24  24
20 FT wind dir..W   W   W   W   W   W   W   W   W   W   W   W
20 FT wind spd..5   6   6   7   9   11  12  13  13  13  13  13
20 FT wind gust.10  11  12  14  16  18  20  22  23  23  23  22
Ridge wind dir..W   W   W   W   W   W   W   W   W   W   W   W
Ridge wind spd..10  10  15  15  15  20  20  20  20  20  20  20
Mix hgt (kft)...2.0 2.5 3.5 4.5 6.5 8.0 10  11  11  11  11  10
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.10  12  13  14  16  18  20  21  21  21  21  21
Haines index....4   4   4   4   4   4   3   3   3   3   3   3
SDspl kt-ft/100016  27  39  54  89  131 171 187 192 197 190 183

.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Mostly clear. Lows in the lower 50s. Highs in the lower 80s. West
winds around 10 mph.
.TUESDAY...
Mostly clear. Lows in the mid 50s. Highs in the lower 80s. West
winds around 10 mph.
.WEDNESDAY...
Partly cloudy. Lows in the lower 50s. Highs in the lower 80s.
West winds around 9 mph.

$$
Forecaster...Rowe
Requested by...Lex Scanlan
Type of request...WILDFIRE
.TAG 2419008.0/RIW
.DELDT 07/26/24
.FormatterVersion 2.0.0
.EMAIL alexa.scanlan@usda.gov