FNUS75 KRIW 242152
FWSRIW

SPOT FORECAST FOR CRYSTAL...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
352 PM MDT TUE AUG 24 2010

FORECAST IS BASED ON REQUEST TIME OF 1535 MDT ON AUGUST 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WARM AND DRY CONDITIONS WILL CONTINUE OVER THE FIRE THROUGH
WEDNESDAY AFTERNOON...AS AN AREA OF HIGH PRESSURE STRENGTHENS OVER
THE STATE. DAYTIME HUMIDITY WILL CONTINUE TO LOWER OVER THE NEXT
COUPLE DAYS...WITH VALUES IN THE LOW TO MID TEENS POSSIBLE DURING
THE LATER HALF OF THE WEEK. AS THE RIDGE CONTINUES TO SLIDE
EAST...A WESTERLY FLOW WILL DEVELOP OVER THE FIRE. THIS FLOW WILL
STRENGTHEN THURSDAY AND FRIDAY AS A TROUGH OF LOW PRESSURE
ADVANCES TOWARDS THE FIRE. ELEVATED WESTERLY WIND WILL COMBINE
WITH LOWERED HUMIDITY AND WARM TEMPERATURES TO POTENTIALLY CREATE
HAZARDOUS FIRE WEATHER CONDITIONS FOR THURSDAY. THE TROUGH WILL
MOVE FURTHER INTO THE INTERMOUNTAIN WEST OF FRIDAY...AND WILL
POTENTIALLY BRING ISOLATED SHOWER AND THUNDERSTORM ACTIVITY BY
FRIDAY AFTERNOON...ALONG WITH SLIGHTLY COOLER TEMPERATURES AND
SLIGHTLY ELEVATED HUMIDITY.

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

FORECASTER...BRANHAM

.TONIGHT...
SKY/WEATHER.........CLEAR (0-5 PERCENT).
MIN TEMPERATURE.....40-43 BELOW 8200 FT...38-41 ABOVE 8200 FT.
MAX HUMIDITY........68-72 PERCENT BELOW 8200 FT...65-69 PERCENT
                    ABOVE 8200 FT.
20 FOOT WINDS.......WEST WINDS 7-10 MPH BECOMING DOWNSLOPE/DOWNVALLEY
                    4-7 MPH AFTER 2200...THEN BECOMING SOUTHEAST
                    AT 6-10 MPH AFTER 0200. GUSTS UP TO 15 MPH.
RIDGE TOP WINDS.....WEST AT 12 TO 16 MPH SHIFTING TO THE SOUTHEAST
                    AFTER 0100.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 1200 FT AGL BY 0200.
TRANSPORT WINDS.....WEST 18 TO 23 MPH SHIFTING TO THE SOUTHEAST
                    AROUND 17 MPH BY 0100.
SMOKE DISPERSAL.....GOOD (70500 KNOT-FT) DECREASING TO POOR (15900
                    KNOT-FT) AFTER 0100.

.WEDNESDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....79-82 BELOW 8200 FT...76-79 ABOVE 8200 FT.
MIN HUMIDITY........14-17 PERCENT BELOW 8200 FT...15-20 PERCENT
                    ABOVE 8200 FT.
20 FOOT WINDS.......EAST TO SOUTHEAST AT 4 TO 7 MPH...BECOMING
                    WEST AT 10 TO 15 MPH AFTER 1200. GUSTS UP TO
                    15 MPH INCREASING TO 20 MPH AFTER 1400.
RIDGE TOP WINDS.....SOUTHEAST 10 TO 15 MPH SHIFTING TO THE WEST 15
                    TO 20 MPH AFTER 1200.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 6900-7900 FT AGL BY 1400.
TRANSPORT WINDS.....SOUTHEAST 14 TO 17 MPH SHIFTING TO THE WEST 17
                    TO 22 MPH AFTER 1200.
SMOKE DISPERSAL.....POOR (17600 KNOT-FT) INCREASING TO GOOD (99900
                    KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...CLEAR. LOWS IN THE LOWER 40S. WINDS GENERALLY
LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER
80S. SOUTH WINDS AROUND 11 MPH.
.FRIDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 40S. HIGHS IN THE MID 70S. SOUTHWEST WINDS AROUND
12 MPH.
.SATURDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...TIDC
REASON FOR REQUEST...WILDFIRE
.TAG 20100824.CRYST.01/RIW