FNUS75 KCYS 071029
FWSCYS

SPOT FORECAST FOR REGION 23 COMPLEX...NSFS CDR
NATIONAL WEATHER SERVICE CHEYENNE WY
429 AM MDT FRI SEP 7 2012

FORECAST IS BASED ON REQUEST TIME OF 1824 MDT ON SEPTEMBER 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A MUCH COOLER AIR MASS HAS FILTERED INTO THE FIRE SITE BEHIND
YESTERDAYS COLD FRONTAL PASSAGE. HUMIDITY RECOVERIES HAVE BEEN
EXCELLENT OVERNIGHT AND MINIMUM RELATIVE HUMIDITIES WILL NOT DROP
NEARLY AS LOW TODAY COMPARED TO THURSDAY. ADDITIONALLY...A FEW
LIGHT RAIN SHOWERS WILL DEFINITELY BE A POSSIBILITY THROUGH AT
LEAST THE MORNING HOURS. HOWEVER...DO NOT ANTICIPATE MUCH OF A
CHANCE OF WETTING RAINS FROM THIS WEAK ACTIVITY. CLOUDS WILL
GRADUALLY DECREASE THROUGH THE DAY BECOMING CLEAR OVERNIGHT. THESE
CLEAR SKIES WILL ALLOW OVERNIGHT LOW TEMPERATURES TO COOL INTO THE
LOW 40S TONIGHT. TEMPERATURES WILL WARM ON SATURDAY WITH DRY
CONDITIONS ANTICIPATED.

.TODAY...

SKY/WEATHER.........CLOUDY (85-95 PERCENT) UNTIL NOON...THEN
                    BECOMING PARTLY CLOUDY (30-40 PERCENT). SCATTERED
                    RAIN SHOWERS IN THE MORNING.
MAX TEMPERATURE.....68 TO 72.
MIN HUMIDITY........30 TO 35 PERCENT.
WIND (20 FT)........NORTH AT 8 TO 12 MPH WITH GUSTS TO 20 MPH.
CWR.................5 PERCENT DECREASING ZERO PERCENT AFTER NOON.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5700-7500 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 15 MPH.
SMOKE DISPERSAL.....EXCELLENT (68100-97400 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY UNTIL 1900...THEN BECOMING
                    CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....40 TO 45.
MAX HUMIDITY........70 TO 75 PERCENT.
WIND (20 FT)........NORTH AT 8 TO 12 MPH WITH GUSTS TO 20 MPH UNTIL
                    1900...THEN BECOMING LIGHT AND VARIABLE AT 5 TO
                    10 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3700 FT AGL DECREASING TO 200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH AT 5 TO 10 MPH UNTIL MIDNIGHT...THEN
                    BECOMING WEST/SOUTHWEST AT AROUND 5 MPH.
SMOKE DISPERSAL.....GOOD DECREASING TO POOR (1700-44100 KNOT-FT)
                    AFTER MIDNIGHT.

.SATURDAY...

SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....75 TO 80.
MIN HUMIDITY........18 TO 23 PERCENT.
WIND (20 FT)........WEST AT 5 TO 10 MPH UNTIL 0900...THEN BECOMING
                    NORTH/NORTHWEST AT 10 TO 15 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3400 FT AGL INCREASING TO 6700 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST/NORTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....GOOD BECOMING EXCELLENT (30800-60300 KNOT-FT)
                    AFTER NOON.

$$
FORECASTER...HAHN
REQUESTED BY...TERRY MCSHANE
TYPE OF REQUEST...WILDFIRE
.TAG 20120906.REGIO.01/CYS