FNUS75 KRIW 221953
FWSRIW

SPOT FORECAST FOR MIDDLE TETON...GRAND TETON NP
NATIONAL WEATHER SERVICE RIVERTON WY
153 PM MDT SUN JUL 22 2012

FORECAST IS BASED ON INCIDENT TIME OF 1329 MDT ON JULY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A WEATHER DISTURBANCE WILL MOVE ACROSS IDAHO AND INTO WESTERN WYOMING
BY THIS EVENING. THIS WILL KEEP SCATTERED SHOWERS AND THUNDERSTORMS
ONGOING OVER THE TETON RANGE UNTIL AT LEAST SUNSET. THE STORMS ARE
RELATIVELY SLOW MOVING SO BRIEF HEAVY RAIN WILL OCCUR. GUSTY OUTFLOW
WIND TO 35 MPH IS ALSO POSSIBLE ALONG WITH DANGEROUS CLOUD-TO-GROUND
LIGHTNING. IMPROVING CONDITIONS ARE NOT EXPECTED UNTIL AFTER MIDNIGHT
TONIGHT FOLLOWING PASSAGE OF THE WEAK DISTURBANCE.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...JONES

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY WITH SCATTERED SHOWERS AND
                    THUNDERSTORMS.
MAX TEMPERATURE.....57-60.
MIN HUMIDITY........42-46 PERCENT.
20 FOOT WINDS.......SOUTHWEST WIND AROUND 10 MPH. WINDS WILL
                    BE GUSTY AND ERRATIC IN ASSOCIATION WITH
                    THE SHOWERS AND STORMS. SUSTAINED SPEEDS
                    OF 15 TO 20 MPH WITH GUSTS UP TO 35 MPH
                    ARE POSSIBLE.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................4.
CHC OF WETTING RAIN.25 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......AROUND 5000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....GOOD.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY WITH SCATTERED SHOWERS AND
                    THUNDERSTORMS UNTIL 2200L. THEN GRADUALLY
                    BECOMING PARTLY CLOUDY (40-50 PERCENT) BY 0300L
                    WITH ISOLATED SHOWERS AND THUNDERSTORMS UNTIL
                    0300L.
MIN TEMPERATURE.....46-49.
MAX HUMIDITY........61-65 PERCENT.
20 FOOT WINDS.......SOUTHWEST WIND AROUND 10 MPH. WINDS WILL
                    BE GUSTY AND ERRATIC IN ASSOCIATION WITH
                    THE SHOWERS AND STORMS. SUSTAINED SPEEDS
                    OF 15 TO 20 MPH WITH GUSTS UP TO 35 MPH
                    ARE POSSIBLE.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................4 UNTIL 2200L...THEN LAL 2 UNTIL 0300L.
                    LAL 1 AFTER 0300L.
CHC OF WETTING RAIN.20 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5000 AGL UNTIL 1900L...THEN DECREASING TO
                    AROUND 2000 FT AGL BY 2200L.
TRANSPORT WINDS.....SOUTHWEST 13 TO 15 MPH.
SMOKE DISPERSAL.....FAIR UNTIL 1900L...THEN BECOMING POOR.

.FORECAST DAYS 3 THROUGH 5...

.MONDAY...PARTLY CLOUDY WITH ISOLATED AFTERNOON AND EVENING
SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS NEAR 60.
WINDS GENERALLY LESS THAN 10 MPH.

.TUESDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID
50S. WEST WINDS AROUND 10 MPH.

.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE
UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH.

.THURSDAY...MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS AROUND 60.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...JONES
REQUESTED BY...GUENTHER
REASON FOR REQUEST...SAR
.TAG 20120722.MIDDL.01/RIW