National Weather Service Text Product Display

Suppression Forecast
Issued by NWS Riverton, WY
Versions: 1 2 3 4 5

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FNUS75 KRIW 131542
FWSRIW

SPOT FORECAST FOR HOLIDAY...BLM RSD
NATIONAL WEATHER SERVICE RIVERTON WY
942 AM MDT MON MAY 13 2013

FORECAST IS BASED ON REQUEST TIME OF 0920 MDT ON MAY 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A HIGH PRESSURE RIDGE WILL BUILD OVER THE AREA WITH
INCREASING WEST SOUTHWEST FLOW ALOFT.  A LEE SIDE TROUGH WILL DEEPEN
OVER EASTERN WYOMING WITH SURFACE HIGH PRESSURE OVER THE NORTHERN
GREAT BASIN.  THIS WILL INCREASE THE PRESSURE GRADIENT OVER THE FIRE
AREA TODAY AND EVEN MORE ON TUESDAY WITH INCREASING SURFACE WINDS AND
LOW SURFACE RELATIVE HUMIDITY.

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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....79-82.
MIN HUMIDITY........10-13 PERCENT.
20 FOOT WINDS.......SOUTHWEST 10 TO 13 MPH. GUSTS UP TO 20 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 13 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4600-5600 FT AGL INCREASING TO 10100-11100 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 13 TO 20 MPH.
SMOKE DISPERSAL.....GOOD (69700 KNOT-FT) INCREASING TO EXCELLENT
                    (175700 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....49-52.
MAX HUMIDITY........43-46 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 12 TO 17 MPH WITH GUSTS TO
                    AROUND 25 MPH.
RIDGE TOP WINDS.....SOUTHWEST 18 TO 22 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8400-9400 FT AGL DECREASING TO 3200-4200 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 18 TO 22 MPH.
SMOKE DISPERSAL.....EXCELLENT (173900 KNOT-FT) DECREASING TO GOOD
                    (80700 KNOT-FT) AFTER MIDNIGHT.

.TUESDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....76-79.
MIN HUMIDITY........12-15 PERCENT.
20 FOOT WINDS.......WEST 13 TO 18 MPH WITH GUSTS TO AROUND 28 MPH
                    IN THE AFTERNOON.
RIDGE TOP WINDS.....WEST AROUND 15 MPH INCREASING TO AROUND 25 MPH
                    LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4800-5800 FT AGL INCREASING TO 9600-10600 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 18 TO 21 MPH INCREASING TO AROUND 28 MPH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD (91700 KNOT-FT) INCREASING TO EXCELLENT
                    (218300 KNOT-FT) IN THE AFTERNOON.

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

$$

FORECASTER...C.BAKER
REQUESTED BY...HOLIDAY IC
REASON FOR REQUEST...WILDFIRE
.TAG 20130513.HOLID.01/RIW
National Weather Service Weather Forecast Office
