472
FNUS75 KRIW 300548
FWSRIW

Spot Forecast for Lamar Confluence...NPS YNP
National Weather Service Riverton WY
1148 PM MDT Fri May 29 2026

Forecast is based on forecast start time of 0000 MDT on May 30.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Isolated showers will be possible over the area through the rest
of the night. Showers will become more likely after sunrise toward
9AM and continue through much of the day. Expect periods of on and
off showers in the evening, with more steadier rain returning late
Saturday night. These showers will then continue through Sunday
morning. Cumulative rainfall amounts through this time (Saturday
through Sunday morning) will approach 1", with the heaviest rain
expected during the day Saturday.


...Thunderstorms imply strong gusty and erratic winds...

.REST OF TONIGHT...

Sky/weather.........Mostly cloudy (75-85 percent). Scattered rain
                    showers and isolated thunderstorms.
Min temperature.....Around 45.
Surface winds (mph).Light winds.

.SATURDAY...

Sky/weather.........Mostly cloudy (80-90 percent). Isolated
                    thunderstorms in the morning. Rain showers
                    through the day. Scattered thunderstorms in the
                    afternoon.
Max temperature.....Around 57.
Surface winds (mph).Light winds.

.SATURDAY NIGHT...

Sky/weather.........Cloudy (90-100 percent). Isolated thunderstorms
                    in the evening. Rain showers through the night.
Min temperature.....Around 41.
Surface winds (mph).Light winds.

.SUNDAY...

Sky/weather.........Cloudy (85-95 percent). Rain showers through
                    the day. Isolated thunderstorms in the
                    afternoon.
Max temperature.....Around 49.
Surface winds (mph).Light winds.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Mostly cloudy. Chance of showers and thunderstorms. Lows in the
upper 30s. Highs in the upper 50s. Light winds.
.TUESDAY...
Partly cloudy. Slight chance of showers and thunderstorms. Lows
in the mid 30s. Highs in the mid 60s. Light winds.
.WEDNESDAY...
Mostly clear. Lows in the upper 30s. Highs in the lower 70s.
Light winds.

$$
Forecaster...LaVoie
Requested by...Warren
Type of request...SAR
.TAG 2614674.0/RIW
.DELDT 05/30/26
.FormatterVersion 2.0.0
.EMAIL laura_dooley@nps.gov