506
FNUS74 KOUN 151305
FWSOUN

Spot Forecast for Lost Lake...USFWS
National Weather Service Norman OK
805 AM CDT Fri Aug 15 2025

Forecast is based on ignition time of 0800 CDT on August 15.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (405) 325-3816 if you have questions
or concerns with this forecast.

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS
EVENING...

.DISCUSSION...
At ignition time, the temperature will be in the mid 70s with an
RH of 80% and winds out of the south at 10-15 mph under clear
skies. Expecting the winds to remain out of the south at 15 mph
with 20-25 mph gusts possible by late morning into the afternoon.
The temperatures are expected to heat up to 100 degrees with a
heat index near 105 degrees and a minimum RH of near 30% by late
afternoon. Winds will only back slightly south-southeast around
sundown.

.REST OF TODAY...

Sky/weather.........Sunny then becoming mostly sunny.
Max temperature.....Around 98.
Min humidity........35 percent.
Wind (20 ft)........South winds 8 to 14 mph.
Mixing height.......8200 ft AGL.
Transport winds.....South 13 to 16 mph.
Smoke dispersal.....Poor to excellent (5800-102400 knot-ft)
                    increasing to excellent (106800-114200 knot-ft)
                    late in the afternoon.

TIME (CDT)      8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........13     13     20     13     27
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............75     85     91     96     98
RH..............84     61     49     40     35
20 FT wind dir..S      S      S      S      S
20 FT wind spd..8      10     12     13     13
20 FT wind gust.14     17     20     21     21
Mix hgt (ft)....500    1500   3100   7300   8200
Transport wind..S 13   S 16   S 15   S 16   S 15
VRate ktft/1000.6      21     40     102    107

.TONIGHT...

Sky/weather.........Mostly clear.
Min temperature.....Around 74.
Max humidity........85 percent.
Wind (20 ft)........South winds 8 to 14 mph.
Mixing height.......400 ft AGL.
Transport winds.....South 15 to 18 mph.
Smoke dispersal.....Excellent (75200-110300 knot-ft) decreasing to
                    poor (5300-8400 knot-ft) early in the evening.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........9      25     18     13     12     18
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............96     90     85     82     79     76
RH..............35     47     57     63     69     76
20 FT wind dir..S      S      S      S      S      S
20 FT wind spd..14     12     10     9      9      9
20 FT wind gust.23     20     17     16     16     16
Mix hgt (ft)....7400   600    400    400    400    400
Transport wind..S 17   S 15   S 16   S 16   S 16   S 15
VRate ktft/1000.110    8      6      6      6      5

.SATURDAY...

Sky/weather.........Sunny then becoming mostly sunny early in the
                    morning then becoming sunny then becoming
                    mostly sunny late in the afternoon.
Max temperature.....Around 96.
Min humidity........38 percent.
Wind (20 ft)........South winds 8 to 13 mph.
Mixing height.......6700 ft AGL.
Transport winds.....South 13 to 18 mph.
Smoke dispersal.....Poor to excellent (4500-98900 knot-ft)
                    increasing to excellent (107300 knot-ft) late
                    in the afternoon.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........17        23        22        27
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............75        80        90        95
RH..............82        74        52        40
20 FT wind dir..S         S         S         S
20 FT wind spd..8         10        12        13
20 FT wind gust.14        17        20        21
Mix hgt (ft)....400       1300      4800      6600
Transport wind..S 14      S 16      S 15      S 16
VRate ktft/1000.5         18        63        93

$$
Forecaster...PIKE
Requested by...Howard Boss
Type of request...PRESCRIBED
.TAG 2519973.0/OUN
.DELDT 08/15/25
.FormatterVersion 2.0.0
.EMAIL howard_boss@fws.gov