359
FNUS73 KLSX 262002
FWSLSX
SPOT FORECAST FOR BRUSH FIRE / 1ST ALARM 26-8300456...FRANKLIN COUNTY EMA
NATIONAL WEATHER SERVICE SAINT LOUIS MO
302 PM CDT THU MAR 26 2026
FORECAST IS BASED ON FORECAST START TIME OF 1500 CDT ON MARCH 26.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE
NATIONAL WEATHER SERVICE.
DISCUSSION
MODERATE TO LOW HUMIDITY AND GUSTY SOUTHWEST WINDS WILL PERSIST
THE REMAINDER OF THE AFTERNOON, WITH DEEP MIXING AND VERY WARM
TEMPERATURES. WHILE WIND SPEEDS WILL WEAKEN BRIEFLY NEAR SUNSET, A
VERY SHARP COLD FRONT WILL BRING AN ABRUPT WIND SHIFT TO THE
NORTH-NORTHEAST OVERNIGHT, AND EVEN STRONGER WIND SPEEDS, LIKELY
BETWEEN 11 PM AND 1 AM. HUMIDITY WILL INCREASE BEHIND THIS FRONT,
BUT THE RAPIDLY CHANGING WIND SPEED AND DIRECTION MAY CAUSE ISSUES
WITH ANY FIRE THAT IS STILL ONGOING. HOWEVER, SHOWERS AND WETTING
RAIN ARE VERY LIKELY BEHIND THIS FRONT, AND A FEW THUNDERSTORMS
WITH BURSTS OF HEAVY RAIN AND HAIL WILL ALSO BE POSSIBLE LATE
TONIGHT AND VERY EARLY TOMORROW MORNING.
RAIN WILL LARGELY END BY SUNRISE, AND A MUCH COOLER AND DRY DAY
CAN BE EXPECTED THE REST OF THE AFTERNOON. EXPECT TEMPERATURES TO
BE 30-40 DEGREES COOLER TOMORROW, BUT HUMIDITY WILL ONCE AGAIN BE
RELATIVELY LOW.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................1 PERCENT.
CHANCE OF THUNDER...4 PERCENT.
TEMPERATURE.........90 AT FORECAST START...MAX 92.
RH..................34 PERCENT AT FORECAST START...MIN 32 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS 11 TO 15 MPH
WITH GUSTS TO AROUND 26 MPH.
WIND (20 FT)........SOUTHWEST WINDS 11 TO 15 MPH
WITH GUSTS TO AROUND 26 MPH.
MIXING HEIGHT.......4500 FT AGL AT FORECAST START...OTHERWISE MAX
4600 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 30 TO 31 MPH.
SMOKE DISPERSAL.....EXCELLENT /18450 M/S-M/ AT FORECAST START.
MAX...EXCELLENT /19390 M/S-M/.
TIME (CDT) 3 PM 5 PM 7 PM 9 PM 11 PM 1 AM
SKY (%).........7 29 76 35 47 72
WEATHER COV..... CHANCE CHANCE
WEATHER TYPE....NONE NONE NONE NONE RNSHWR RNSHWR
TSTM COV........ CHANCE CHANCE
CWR.............0 0 70 70 70 70
CHC OF THDR (%).0 0 10 10 40 40
TEMP............90 91 87 82 77 65
RH..............34 32 36 44 50 70
20 FT WIND......SW 11 SW 14 SW 9 SW 7 W 9 N 12
20 FT WIND GUST.25 25 19 16 20 20
EYE LEVEL WIND..SW 5 SW 6 SW 4 SW 3 W 4 N 6
EYE LVL WND GST.12 12 9 7 9 9
MIX HGT (KFT)...4.5 4.2 0.8 0.7 0.7 1.7
TRANSPORT WIND..SW 30 SW 30 SW 18 SW 16 W 15 N 21
VRATE KT-FT/1K..117 109 12 10 10 30
VENTRATE CAT....VYGD VYGD POOR POOR POOR POOR
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF RAIN
SHOWERS IN THE EVENING. CHANCE OF THUNDERSTORMS
THROUGH THE NIGHT. RAIN SHOWERS OVERNIGHT.
CWR.................72 PERCENT.
CHANCE OF THUNDER...40 PERCENT.
TEMPERATURE.........MIN 40.
RH..................MAX 93 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS AROUND 4 TO 8 MPH WITH GUSTS TO
AROUND 10 MPH, THEN SHIFTING TO THE NORTH 5 TO 7 MPH WITH GUSTS
TO AROUND 15 MPH OVERNIGHT. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE LATE
EVENING AND OVERNIGHT.
WIND (20 FT)........SOUTHWEST WINDS AROUND 10-15 MPH WITH GUSTS TO
AROUND 20 MPH, THEN SHIFTING TO THE NORTH 12 TO 15 MPH WITH GUSTS
TO AROUND 30 MPH OVERNIGHT. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE LATE
EVENING AND OVERNIGHT.
MIXING HEIGHT.......MIN 700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 23 MPH SHIFTING TO THE NORTH 21
TO 26 MPH OVERNIGHT.
SMOKE DISPERSAL.....FAIR (7780 M/S-M) EARLY IN THE EVENING
DECREASING TO POOR MIN (1510 M/S-M) LATE IN THE
NIGHT.
FORECASTER...19
REQUESTED BY...ABE COOK
TYPE OF REQUEST...WILDFIRE
.TAG 2608048.0/LSX
.DELDT 03/26/26
.FORMATTERVERSION 2.0.0
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page