FNUS73 KLBF 211531
FWSLBF

SPOT FORECAST FOR CRANE RX...SD STATE FIRE
NATIONAL WEATHER SERVICE NORTH PLATTE NE
1031 AM CDT SUN MAR 21 2010

FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON MARCH 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
HIGH PRESSURE AT THE SURFACE WILL REMAIN IN PLACE ACROSS SOUTHWEST
NEBRASKA THIS AFTERNOON. UNFORTUNATELY THIS MEANS LIGHT WINDS AT
SURFACE AND JUST ABOVE SO MIXING WILL BE MINIMAL LEAVING THE SMOKE
DISPERSAL IN THE POOR RANGE. WINDS IN/NEAR CANYONS WILL BE VARIABLE
WITH THESE LIGHT WINDS. SURFACE TROF WILL STRENGTHEN AND MOVE INTO
WESTERN NEB ON MONDAY...WHICH SHOULD INCREASE THE WINDS TO THE
SOUTHWEST AND IMPROVE VENTILATION. WE DO EXPECT SOME ELEVATED FIRE
WEATHER CONDITIONS ON MONDAY WITH FAVORABLE PATTERNS...BREAKING UPPER
RIDGE ALOFT AND THE SURFACE TROF IN THE VICINITY OF NEB. RELATIVE
HUMIDITY LEVELS COULD GET QUITE LOW WEST OF THE PRESCRIBED AREA...AND
THIS WILL CONTINUE TO BE MONITORED. FRONT MOVES THROUGH MONDAY EVENING
DROPPING TEMPS FOR TUESDAY...TIMING STILL IN QUESTION. FEEL FREE TO
CALL IF ANY QUESTIONS.

.TODAY...

SKY/WEATHER.........SUNNY.
                    TEMPERATURE.........38 AT IGNITION...MAX 53.
                    MIN HUMIDITY........46 PERCENT AT IGNITION...MIN 29 PERCENT.
WIND (EYE LEVEL)....LIGHT WINDS BECOMING WEST 5 TO 6 MPH IN THE
                    LATE MORNING AND AFTERNOON.
WIND (20 FT)........WINDS WEST AT 6 MPH AT IGNITION...OTHERWISE
                    LIGHT WINDS AROUND 10 MPH FROM THE WEST.
LAL.................1.
HAINES INDEX........5 MODERATE AT IGNITION...MAX 5.
MIXING HEIGHT.......2000 FT AGL AT IGNITION...AROUND 2500 FT AGL
                    THROUGH THE AFTERNOON.
TRANSPORT WINDS.....WEST 8 TO 14 MPH.
SMOKE DISPERSAL.....POOR.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....25.
MAX HUMIDITY........78 PERCENT.
WIND (EYE LEVEL)....LIGHT WINDS BECOMING SOUTHWEST AROUND 5 MPH
                    AFTER MIDNIGHT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST AROUND 5 MPH
                    AFTER MIDNIGHT.
LAL.................1.
HAINES INDEX........4 TO 5 OR LOW TO MODERATE.
MIXING HEIGHT.......1000-2900 FT AGL UNTIL 0100...THEN 400-700 FT
                    AGL.
TRANSPORT WINDS.....SOUTHWEST 7 TO 9 MPH.
SMOKE DISPERSAL.....POOR.

.MONDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....66.
MIN HUMIDITY........27 PERCENT.
WIND (EYE LEVEL)....SOUTH WINDS 5 TO 11 MPH.
WIND (20 FT)........SOUTH WINDS 5 TO 11 MPH.
LAL.................1.
HAINES INDEX........4 TO 5 OR LOW TO MODERATE.
MIXING HEIGHT.......500-1700 FT AGL UNTIL 1400. 4500-6400 FT AGL
                    AFTER 1600.
TRANSPORT WINDS.....SOUTHWEST 7 TO 14 MPH INCREASING TO 17 TO 21
                    MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....POOR TO FAIR INCREASING TO GOOD EARLY
                    IN THE AFTERNOON.

$$
FORECASTER...13
REQUESTED BY...TIM EGGERS
TYPE OF REQUEST...PRESCRIBED
.TAG 20100321.CRANE.02/LBF