FNUS75 KRIW 160308
FWSRIW

SPOT FORECAST FOR EFD WATER PLANT...EVANSVILLE FIRE DEPARTMENT
NATIONAL WEATHER SERVICE RIVERTON WY
908 PM MDT SAT MAY 15 2010

FORECAST IS BASED ON IGNITION TIME OF 1900 MDT ON MAY 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER RIDGE OF HIGH PRESSURE WILL BUILD IN
TONIGHT AND SUNDAY...USHERING IN A DRIER AND WARMER AIRMASS.
ENOUGH INSTABILITY WILL LINGER FROM THE BIG HORN MOUNTAINS DOWN TO
CASPER FOR A STRAY SHOWER OR THUNDERSTORM TO DEVELOP DURING SUNDAY AFTERNOON.
SURFACE HIGH PRESSURE WILL REMAIN TO THE EAST WITH A LIGHT
NORTHWEST FLOW MIXING DOWN TO THE SURFACE IN THE AFTERNOON.

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

FORECASTER...MEUNIER

.SUNDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).  BECOMING PARTLY CLOUDY
                    AFTER 1400 WITH A STRAY SHOWER OR THUNDERSTORM POSSIBLE.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........21-24 PERCENT.
WIND (20 FT)........WEST SOUTHWEST 5-9 MPH BECOMING NORTH NORTHWEST 5-9 MPH
                    BETWEEN 1100 AND 1300.
RIDGE TOP WINDS.....NORTHWEST TO NORTH 5 TO 10 MPH.
LAL.................1.
CWR.................ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2000 FT AGL THROUGH 0900 INCREASING TO 9500-10500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR THROUGH 0900 INCREASING TO VERY GOOD
                    (118800 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 40S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS
THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS IN THE
MID 40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...CAPT  DANE ANDERSEN
REASON FOR REQUEST...PRESCRIBED
.TAG 20100516.EFDWA.01/RIW