615
FNUS74 KBMX 200856
FWSBMX
SPOT FORECAST FOR HORN MTN 1/20...USFS
NATIONAL WEATHER SERVICE BIRMINGHAM AL
256 AM CST TUE JAN 20 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 CST ON JANUARY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
COOL, DRY CONDITIONS CONTINUE TODAY, WITH GENERALLY LIGHT N OR NW
WINDS. MIN RH IS LIKELY TO BE NEAR 20 PERCENT THIS AFTERNOON. MIXING
HEIGHT TO 2000 FT, TRANSPORT WINDS 10-12 MPH, AND DISPERSION
20-25. CLOUD COVER WILL INCREASE BY WEDNESDAY, WITH S TO SE WINDS.
RH DOWN TO AROUND 25 PERCENT AGAIN WEDNESDAY AFTERNOON. RAIN
CHANCES INCREASING DURING AFTERNOON AS MOISTURE WORKS IN,
EVENTUALLY RAISING RH BY WEDNESDAY EVENING.
TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....AROUND 44.
MIN HUMIDITY........21 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......2000 FT AGL.
TRANSPORT WINDS.....NORTH 3 TO 12 MPH SHIFTING TO THE NORTHEAST
AROUND 2 MPH LATE IN THE AFTERNOON.
DISPERSION INDEX....5 INCREASING TO 20 LATE IN THE MORNING, THEN
DECREASING TO 3 LATE IN THE AFTERNOON.
LVORI...............3.
TIME (CST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........15 13 17 14 12 13
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............25 27 34 40 42 41
RH..............71 60 36 23 22 24
20 FT WIND......N 3 N 3 N 3 N 3 N 2 N 2
20 FT WIND GUST.8 10 10 8 7 6
20 FT WIND DIR..350 000 350 350 350 350
MIX HGT (FT)....BLW100 600 1200 1600 2000 1300
TRANSPORT WIND..N 8 N 10 N 12 N 9 N 8 N 3
DISPERSION IDX..4 5 5 19 21 6
LVORI...........3 3 2 2 2 2
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
CWR.................0 PERCENT.
MIN TEMPERATURE.....AROUND 27.
MAX HUMIDITY........50 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST AROUND 5 MPH
AFTER 3 AM.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....EAST 3 TO 9 MPH SHIFTING TO THE SOUTHEAST
AROUND 12 MPH AFTER 3 AM.
DISPERSION INDEX....3.
LVORI...............2.
TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........7 12 16 22 35 34
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 0 0 0
TEMP............35 30 28 27 28 29
RH..............33 46 48 50 46 44
20 FT WIND......NE 1 E 2 SE 2 SE 3 SE 3 SE 5
20 FT WIND GUST.2 5 6 6 7 8
20 FT WIND DIR..050 100 120 130 130 140
MIX HGT (FT)....BLW100 BLW100 BLW100 BLW100 BLW100 BLW100
TRANSPORT WIND..E 3 E 5 E 6 E 8 E 9 SE 12
DISPERSION IDX..0 1 1 4 4 5
LVORI...........2 2 2 2 2 2
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT) THEN BECOMING
CLOUDY (85-95 PERCENT). SLIGHT CHANCE OF RAIN
IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 20 PERCENT IN THE
AFTERNOON.
MAX TEMPERATURE.....AROUND 53.
MIN HUMIDITY........26 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 5 TO 6 MPH BECOMING LIGHT.
MIXING HEIGHT.......1600 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 16 MPH.
DISPERSION INDEX....8 INCREASING TO 25 LATE IN THE MORNING, THEN
DECREASING TO 11 LATE IN THE AFTERNOON
DECREASING TO 0 LATE IN THE AFTERNOON.
LVORI...............2.
TIME (CST) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........36 59 69 78 85 89
WEATHER COV..... S CHC S CHC S CHC
WEATHER TYPE....NONE NONE NONE RAIN RAIN RAIN
TSTM COV........
CWR.............0 0 0 20 20 20
TEMP............29 33 42 49 52 50
RH..............46 43 33 26 26 32
20 FT WIND......SE 5 SE 5 SE 5 S 6 S 5 S 5
20 FT WIND GUST.10 10 12 12 11 10
20 FT WIND DIR..150 140 150 170 170 170
MIX HGT (FT)....BLW100 200 900 1500 1600 1000
TRANSPORT WIND..SE 12 S 13 S 16 S 15 S 13 S 10
DISPERSION IDX..5 8 11 29 26 11
LVORI...........2 2 2 2 2 2
FORECASTER...ROBINSON
REQUESTED BY...SEAN SNYDER
TYPE OF REQUEST...PRESCRIBED
.TAG 2600523.0/BMX
.DELDT 01/20/26
.FORMATTERVERSION 2.0.0
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