375
FNUS74 KMEG 180814
FWSMEG

Spot Forecast for HS IU 98-1...USFS
National Weather Service Memphis TN
314 AM CDT Fri Apr 18 2025

Forecast is based on ignition time of 1000 CDT on April 18.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

MinRH values will likely remain in the 35 to 40% range, with wind
speeds picking up through the day. Peak surface wind gusts will
approach 25 to 30 mph, with 20 ft wind gusts approaching 20 mph.
Dry conditions expected throughout the ignition time, with no fog
expected Saturday morning.

.TODAY...

Sky/weather.........Partly sunny (50-60 percent).
CWR.................0 percent.
Max temperature.....Around 86.
Min humidity........37 percent.
Dewpoint............57.
Wind (20 ft)........South winds 7 to 9 mph with gusts to around 18
                    mph.
Mixing height.......4000 ft AGL.
Mixing height (m)...152-1219 meters AGL.
Transport winds.....South 16 to 25 mph.
Transport winds m/s.South 7 to 11 meters/second.
Smoke dispersal.....Poor (1200 knot-ft) early in the morning
                    increasing to fair (13200 knot-ft) in the
                    afternoon.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........79  73  55  44  36  34  28  28
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0
Temp............70  73  77  80  83  84  85  86
Dewpoint........59  59  59  59  58  58  58  57
RH..............68  62  54  49  43  41  40  37
20 FT wind dir..S   S   S   S   S   S   S   S
20 FT wind spd..9   9   9   9   9   9   9   8
20 FT wind gust.18  18  18  18  18  18  18  18
Mix hgt (kft)...2.2 2.4 3.0 3.3 3.6 3.9 4.0 3.7
Mix hgt (km)....0.7 0.7 0.9 1.0 1.1 1.2 1.2 1.1
Transp wind dir.S   S   S   S   S   S   S   S
Transp wind spd.24  23  22  22  24  23  24  25
Trans wind dir..S   S   S   S   S   S   S   S
Trans spd (m/s).11  10  10  10  11  10  11  11
Vrate kt-ft/1K..7   8   9   10  12  12  13  13
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (55-65 percent).
CWR.................0 percent.
Min temperature.....Around 64.
Max humidity........87 percent.
Dewpoint............58.
Wind (20 ft)........South winds 6 to 7 mph. Gusts up to 21 mph
                    early in the evening then 20 mph overnight.
Mixing height.......400 ft AGL.
Mixing height (m)...122-671 meters AGL.
Transport winds.....South 12 to 21 mph.
Transport winds m/s.South 5 to 9 meters/second.
Smoke dispersal.....Poor (700 knot-ft).

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........34  42  37  27  18  21  19  31  37  43  55  64
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............84  81  80  76  74  73  72  71  69  68  66  66
Dewpoint........57  58  59  60  60  59  59  59  59  59  59  60
RH..............40  46  49  58  62  62  64  66  70  73  78  81
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..7   7   7   7   6   7   7   7   7   7   7   7
20 FT wind gust.17  14  14  14  14  14  16  16  16  16  16  14
Mix hgt (kft)...2.2 0.5 0.4 0.4 0.4 0.5 0.6 0.6 0.7 0.6 0.6 0.6
Mix hgt (km)....0.7 0.2 0.1 0.1 0.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.21  15  12  13  15  16  17  17  16  15  15  15
Trans wind dir..S   S   S   S   S   S   S   S   S   S   S   S
Trans spd (m/s).9   7   5   6   7   7   8   8   7   7   7   7
Vrate kt-ft/1K..6   1   1   1   1   1   1   2   1   1   1   1
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.SATURDAY...

Sky/weather.........Mostly cloudy (65-75 percent).
CWR.................0 percent.
Max temperature.....Around 86.
Min humidity........39 percent.
Dewpoint............60.
Wind (20 ft)........South winds 6 to 7 mph.
Mixing height.......4600 ft AGL.
Mixing height (m)...213-1402 meters AGL.
Transport winds.....South 15 to 20 mph.
Transport winds m/s.South 7 to 9 meters/second.
Smoke dispersal.....Poor (1400 knot-ft).

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........71        65        70        74
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
CWR.............0         0         0         0
Temp............66        69        80        85
Dewpoint........60        62        61        59
RH..............81        78        52        41
20 FT wind......S 7G14    S 7G14    S 7G14    S 7G14
Mix hgt (ft)....700       1900      3300      4300
Mix hgt (m).....210       580       1010      1310
Transport wind..S 15      S 18      S 16      S 17
Tran wind (m/s).S 7       S 8       S 7       S 8
Vrate kt-ft/1K..1         5         7         10
Ventrate Cat....POOR      POOR      POOR      POOR

$$
Forecaster...CMA
Requested by...John Townsend
Type of request...PRESCRIBED
.TAG 2510959.0/MEG
.DELDT 04/18/25
.FormatterVersion 2.0.0
.EMAIL john.townsend@usda.gov