089
FNUS75 KRIW 281856
FWSRIW

Spot Forecast for TEST RIW1...RIW
National Weather Service Riverton WY
1256 PM MDT Tue May 28 2024

Forecast is based on ignition time of 1200 MDT on May 29.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

This is a test!

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

.WEDNESDAY...

Sky/weather.........Partly sunny (50-60 percent). Scattered showers
                    and thunderstorms.
CWR.................44 percent.
Chance of pcpn......50 percent.
LAL.................4.
Max temperature.....Around 62.
Min humidity........40 percent.
Wind (20 ft)........West winds 10 to 17 mph. Gusts up to 26 mph
                    increasing to 31 mph late in the afternoon.
                    Gusty and erratic winds expected near
                    thunderstorms.
Ridgetop wind.......West 20 to 25 mph.
Mixing height.......6900 ft AGL decreasing to 4300 ft AGL late in
                    the afternoon.
Transport winds.....West 18 to 25 mph.
Smoke dispersal.....Good (95400 knot-ft) early in the morning
                    increasing to very good (110400 knot-ft) in the
                    afternoon.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........64  62  59  57  53  50
Weather cov.....SCT SCT SCT SCT SCT SCT
Weather type....RW  RW  RW  RW  RW  RW
Tstm cov........SCT SCT SCT SCT SCT SCT
CWR.............40  40  40  40  40  40
Chc of pcpn (%).50  50  50  40  40  40
LAL.............4   4   4   4   4   4
Temp............61  60  59  58  57  56
RH..............40  43  46  48  49  49
20 FT wind dir..W   W   W   W   W   W
20 FT wind spd..10  11  14  17  15  12
20 FT wind gust.16  17  21  25  22  18
Ridge wind dir..W   W   W   W   W   W
Ridge wind spd..20  20  20  25  25  25
Mix hgt (kft)...6.9 6.9 6.9 4.3 4.3 4.3
Transp wind dir.SW  SW  SW  W   W   W
Transp wind spd.18  18  18  25  25  25
Haines index....3   3   3   3   3   3
SDspl kt-ft/1000110 110 110 95  95  95

.WEDNESDAY NIGHT...

Sky/weather.........Partly cloudy (20-30 percent). Widespread frost
                    early in the morning.
CWR.................0 percent.
Chance of pcpn......0 percent.
LAL.................1.
Min temperature.....Around 29.
Max humidity........70 percent.
Wind (20 ft)........Northwest winds 5 to 13 mph with gusts to
                    around 19 mph in the evening and overnight
                    becoming light.
Ridgetop wind.......Northwest 15 to 20 mph decreasing to around 10
                    mph overnight.
Mixing height.......3800 ft AGL decreasing to 600 ft AGL.
Transport winds.....Northwest 9 to 18 mph.
Smoke dispersal.....Good (61200 knot-ft) early in the evening
                    decreasing to poor (4800 knot-ft) late in the
                    night.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........46     28     15     7      7      6
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Chc of pcpn (%).0      0      0      0      0      0
LAL.............1      1      1      1      1      1
Temp............55     48     42     37     34     32
RH..............49     53     57     60     61     64
20 ft wind......W 13   W 9    NW 6   NW 5   NW 5   NW 4
20 ft wind gust.19     14     8      7      7      6
Ridgetop wind...W 20   W 20   NW 15  NW 10  NW 10  NW 10
Mix hgt (ft)....3800   3800   2200   700    700    600
Transport wind..W 18   W 18   W 13   NW 10  NW 10  NW 9
Haines index....3      3      3      2      2      2
SDspl kt-ft/100061     61     25     6      6      5

.THURSDAY...

Sky/weather.........Sunny (5-15 percent). Widespread frost early in
                    the morning.
CWR.................0 percent.
Chance of pcpn......0 percent.
LAL.................1.
Max temperature.....Around 54.
Min humidity........26 percent.
Wind (20 ft)........Light winds becoming west 5 to 11 mph with
                    gusts to around 19 mph.
Ridgetop wind.......West 10 to 15 mph increasing to around 20 mph
                    late in the afternoon.
Mixing height.......600 ft AGL increasing to 6700 ft AGL.
Transport winds.....West 10 to 18 mph increasing to around 22 mph
                    late in the afternoon.
Smoke dispersal.....Poor (5200 knot-ft) early in the morning
                    increasing to good (90900 knot-ft) in the
                    afternoon increasing to very good (127400
                    knot-ft) late in the afternoon.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

TIME (MDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........5         7         14        14
Weather cov.....WIDSPD
Weather type....FROST     NONE      NONE      NONE
Tstm cov........
CWR.............0         0         0         0
Chc of pcpn (%).0         0         0         0
LAL.............1         1         1         1
Temp............29        39        50        53
RH..............69        43        29        26
20 FT wind......NW 4G7    W 6G12    W 8G14    W 11G18
Ridgetop wind...NW 10     W 15      W 15      W 20
Mix hgt (ft)....600       3500      5700      6700
Transport wind..NW 10     W 14      W 18      W 22
Haines index....2         2         2         2
SDspl kt-ft/10005         42        91        127

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Mostly clear. Lows in the upper 20s. Highs in the lower 60s.
Northwest winds around 6 mph.
.SATURDAY...
Mostly clear. Lows in the mid 30s. Highs in the mid 60s.
Northwest winds around 6 mph.
.SUNDAY...
Mostly cloudy. Lows in the upper 30s. Highs in the lower 60s.
Northwest winds around 7 mph.

$$
Forecaster...Myers
Requested by...Myers
Type of request...PRESCRIBED
.TAG 2490863.0/RIW
.DELDT 05/28/24
.FormatterVersion 2.0.0
.EMAIL noah.myers@noaa.gov