832
FNUS75 KCYS 190500
FWSCYS
SPOT FORECAST FOR HATCHER FIRE...BUREAU OF LAND MANAGEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
1100 PM MDT TUE JUN 18 2013
FORECAST IS BASED ON REQUEST TIME OF 2246 MDT ON JUNE 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SOUTHWEST FLOW ALOFT WILL CONTINUE THE REST OF THE NIGHT AS
SURFACE LOW PRESSURE DEVELOPS OVER NORTHWEST WYOMING. SOUTH WINDS
WILL SLOWLY INCREASE THE REST OF THE NIGHT. DURING THE DAY ON
WEDNESDAY...SOUTHWEST FLOW ALOFT WILL STRENGTHEN WITH SURFACE LOW
PRESSURE STRENGTHENING ACROSS EASTERN MONTANA WITH SOUTHWEST WINDS
INCREASING SIGNIFICANTLY ACROSS THE BURN SITE IN THE AFTERNOON.
A DRY PACIFIC ORIGIN COLD FRONT WILL MOVE ACROSS THE BURN SITE
AFTER MIDNIGHT WEDNESDAY NIGHT WITH WINDS BECOMING WEST.
TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 87.
MIN HUMIDITY........10 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 15 TO 25 MPH. GUSTS UP TO 25
MPH INCREASING TO 35 MPH IN THE AFTERNOON.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
FIRE GROWTH.
MIXING HEIGHT.......8500 FT AGL INCREASING TO 15800 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 21 MPH.
SMOKE DISPERSAL.....EXCELLENT TO EXCELLENT (117400-359800 KNOT-FT).
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....AROUND 52.
MAX HUMIDITY........48 PERCENT.
WIND (20 FT)........WEST WINDS 9 TO 18 MPH. GUSTS UP TO 30 MPH
DECREASING TO 20 MPH AFTER MIDNIGHT.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
FIRE GROWTH.
MIXING HEIGHT.......8200 FT AGL DECREASING TO 100 FT AGL AFTER
MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 18 MPH.
SMOKE DISPERSAL.....POOR TO EXCELLENT (1400-179100 KNOT-FT).
THURSDAY
SKY/WEATHER.........SUNNY (0-5 PERCENT) THEN BECOMING PARTLY CLOUDY
(30-40 PERCENT).
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........15 PERCENT.
WIND (20 FT)........WEST WINDS AROUND 10 MPH EARLY IN THE MORNING
BECOMING UPSLOPE/UPVALLEY 5-9 MPH.
CWR.................10 PERCENT.
LAL.................1.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5800 FT AGL INCREASING TO 12100 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH.
SMOKE DISPERSAL.....GOOD TO EXCELLENT (33400-129700 KNOT-FT).
FORECASTER...RUBIN
REQUESTED BY...RAWLINS DISPATCH
TYPE OF REQUEST...WILDFIRE
.TAG 20130618.HATCH.01/CYS
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