FNUS74 KOUN 181411
FWSOUN

SPOT FORECAST FOR BLACK KETTLE U-58...USFS
NATIONAL WEATHER SERVICE NORMAN OK
811 AM CST THU FEB 18 2010

FORECAST IS BASED ON IGNITION TIME OF 0930 CST ON FEBRUARY 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
TODAY WILL BE MILD AND DRY...WITH MINIMUM HUMIDITY OF 30 TO 35 PERCENT.
SOUTH WINDS WILL INCREASE TO BETWEEN 15 AND 20 MPH BY MID MORNING...AND
WILL REMAIN CONSISTENT IN SPEED AND DIRECTION THROUGH THE AFTERNOON.
SOME GUSTS OVER 25 MPH ARE LIKELY. TONIGHT...A LOW LEVEL JET WILL
DEVELOP...AND WILL MAINTAIN GUSTY SOUTH WINDS AT HIGHER ELEVATIONS.
ISOLATED LIGHT RAIN SHOWERS ARE POSSIBLE LATE TONIGHT AND EARLY
FRIDAY...FOLLOWED BY A WIND SHIFT FROM THE NORTHWEST BY AROUND 10 AM.
LOW CLOUDS WILL INCREASE...AND AFTERNOON HIGHS WILL BE CONSIDERABLY
COOLER ON FRIDAY. A SLOW APPROACHING WEATHER SYSTEM THIS WEEKEND WILL
RESULT IN CONTINUED CHANGES IN WIND DIRECTION AND AN INCREASED CHANCE
OF PRECIPITATION FROM SATURDAY INTO SUNDAY.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT CLOUD COVER).
MAX TEMPERATURE.....43 AT IGNITION...MAX 58.
MIN HUMIDITY........62 PERCENT AT IGNITION...MIN 33 PERCENT AT 3-5 PM.
WIND (20 FT)........WINDS SOUTH AT 11 MPH AT IGNITION...OTHERWISE
                    SOUTH WINDS INCREASING TO 15-20 MPH WITH GUSTS TO
                    AROUND 25 MPH.
MIXING HEIGHT.......600 FT AGL AT IGNITION...INCREASING TO 1300 FEET AT
                    12 PM. THEN INCREASING MORE RAPIDLY TOWARD 5000 FT AGL
                    BY 3 PM.
TRANSPORT WINDS.....SOUTH 16 MPH INCREASING TO 30 MPH AFTER 12 PM.

TIME (CST)      9 AM   11 AM  1 PM   3 PM   5 PM   7 PM
SKY (%).........PCLDY  PCLDY  MCLDY  MCLDY  MCLDY  MCLDY
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TEMP............38     47     54     58     55     50
RH..............62     45     36     33     38     48
20 FT WIND......S 12   S 13   S 14   S 16   S 15   S 13
20 FT WIND GUST.15     20     20     25     20     20
MIX HGT (FT)....400    1000   2900   5000   4300   2200
MIX HGT (M).....120    300    880    1520   1310   670
TRANSPORT WIND..S 9    S 16   S 23   S 29   S 29   S 22
TRAN WIND (M/S).S 4    S 7    S 10   S 13   S 13   S 10

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT CLOUD COVER).
MIN TEMPERATURE.....MIN 32.
MAX HUMIDITY........MAX 100 PERCENT.
WIND (20 FT)........SOUTH WINDS 12 TO 17 MPH. GUSTS UP TO 30 MPH
                    AFTER 10 PM.
MIXING HEIGHT.......2200-3300 FT AGL DECREASING TO 1100 FT AGL
                    EARLY IN THE EVENING.
TRANSPORT WINDS.....SOUTH 22 TO 26 MPH DECREASING TO 14 TO 22 MPH
                    EARLY IN THE EVENING...THEN INCREASING TO 21 TO
                    28 MPH AFTER 10 PM.

.FRIDAY...

SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT CLOUD COVER).
MAX TEMPERATURE.....MAX 47.
MIN HUMIDITY........MIN 60 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 7 MPH SHIFTING TO THE
                    NORTH 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH
                    EARLY IN THE MORNING.
MIXING HEIGHT.......400 FT AGL EARLY MORNING...INCREASING TO 2800-3500
                    FT AGL EARLY IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 12 TO 17 MPH SHIFTING TO THE NORTH 13
                    TO 20 MPH IN THE AFTERNOON.

$$
FORECASTER...BURKE
REQUESTED BY...BRYAN HAJNY
TYPE OF REQUEST...PRESCRIBED
.TAG 20100218.BLACK.01/OUN