252
FNUS53 KLSX 201355
FWFLSX
FIRE WEATHER PLANNING FORECAST FOR EASTERN/CENTRAL MO AND SOUTHWEST IL
NATIONAL WEATHER SERVICE SAINT LOUIS MO
855 AM CDT MON APR 20 2026
MODEST WARMING WILL BEGIN TODAY WITH HIGHS IN THE LOW TO MID-70S
RETURNING TO CENTRAL AND SOUTHEAST MISSOURI. TEMPERATURES THEN
WARM MORE SIGNIFICANTLY TUESDAY THROUGH THURSDAY WITH WIDESPREAD
HIGHS IN THE 70S TO LOW-80S. ACTIVE WEATHER RETURNS WITH THE
APPROACH OF A COLD FRONT LATE THURSDAY NIGHT INTO FRIDAY. A
WIDESPREAD, SOAKING RAINFALL IS EXPECTED AERIAL AVERAGES SHOWING
AMOUNTS AROUND 0.50". EXACT AMOUNTS MAY VARY WIDELY IN AND AROUND
THUNDERSTORMS.
MINIMUM RH VALUES WILL RANGE THROUGH THE 30S TODAY. HIGHER
MOISTURE WILL ACCOMPANY THE WARMING TREND THIS WEEK WITH MINIMUM
RH VALUE RISING THROUGH THE 40-50% RANGE TUESDAY AND 45-60%
WEDNESDAY. MIXING HEIGHTS REMAIN FAIRLY STEADY THROUGH MIDWEEK,
GENERALLY RANGING FROM 4000 TO 6000 FEET. GOOD VENTILATION RATES
ARE FORECAST FOR TUESDAY, BOOKENDED BY FAIR TO POOR RATES TODAY
AND WEDNESDAY.
MOZ072-073-083-084-099-202100-
CRAWFORD MO-WASHINGTON MO-DENT MO-IRON MO-REYNOLDS MO-
INCLUDING THE CITIES OF POTOSI/SALEM RANGER DISTRICT AND SALEM
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 75 (+6) 49 (+12) 79
RH % (24H TREND) 30 (+3) 68 (-20) 30
WIND 20FT AM(MPH) LGT/VAR SW 4-8 G21
WIND 20FT PM(MPH) LGT/VAR LGT/VAR SW 6-10 G21
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 66 71
MIXING HGT(FT-AGL) 6070 330 5680
TRANSPORT WND (M/S) SW 6 S 5 SW 11
TRANSPORT WND (MPH) SW 13 S 10 SW 24
VENT RATE (M/S-M) 14540 0 21370
GOOD POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE
UPPER 70S. SOUTH WINDS 10 TO 15 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS IN THE
LOWER 60S. HIGHS IN THE MID 70S. SOUTHWEST WINDS 10 TO 15 MPH.
SATURDAY
MOSTLY CLOUDY. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S.
NORTHEAST WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER
50S. HIGHS IN THE LOWER 70S. NORTHEAST WINDS 5 TO 10 MPH.
MOZ074-075-085-202100-
SAINT FRANCOIS MO-SAINTE GENEVIEVE MO-MADISON MO-
INCLUDING THE CITIES OF FARMINGTON AND FREDERICKTOWN RANGER
DISTRICT
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 74 (+6) 49 (+10) 79
RH % (24H TREND) 35 (+7) 70 (-14) 31
WIND 20FT AM(MPH) LGT/VAR SW 5-9 G20
WIND 20FT PM(MPH) LGT/VAR S 3-7 SW 8-12 G20
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 63 72
MIXING HGT(FT-AGL) 5150 320 5650
TRANSPORT WND (M/S) SW 5 SW 6 SW 11
TRANSPORT WND (MPH) SW 10 SW 14 SW 24
VENT RATE (M/S-M) 10380 40 21930
GOOD POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS AROUND 80.
SOUTH WINDS 10 TO 15 MPH.
FRIDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE MID 70S.
SOUTHWEST WINDS 10 TO 15 MPH.
SATURDAY
MOSTLY CLOUDY. SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. NORTH
WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER
50S. HIGHS IN THE LOWER 70S. NORTHEAST WINDS 5 TO 10 MPH.
MOZ041-047>050-202100-
BOONE MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-
INCLUDING THE CITIES OF COLUMBIA, CEDAR CREEK RANGER DISTRICT,
JEFFERSON CITY, AND FULTON
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 75 (+7) 51 (+12) 78
RH % (24H TREND) 31 (+4) 70 (-8) 42
WIND 20FT AM(MPH) SE 4-8 SW 8-12 G26
WIND 20FT PM(MPH) S 5-9 G16 S 3-7 G15 SW 11-15 G26
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 64 69
MIXING HGT(FT-AGL) 5360 360 4440
TRANSPORT WND (M/S) SW 7 S 5 SW 13
TRANSPORT WND (MPH) SW 15 S 12 SW 29
VENT RATE (M/S-M) 13540 260 19480
GOOD POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 10 TO 15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS AROUND
80. SOUTH WINDS 15 TO 20 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS IN THE
UPPER 50S. HIGHS IN THE LOWER 70S. WEST WINDS 10 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS AROUND 70. NORTHEAST WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE UPPER 60S. NORTHEAST WINDS 5 TO 10 MPH.
MOZ051-059-060-062-065-202100-
MONTGOMERY MO-GASCONADE MO-WARREN MO-FRANKLIN MO-JEFFERSON MO-
INCLUDING THE CITIES OF WASHINGTON, UNION, AND SULLIVAN
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 74 (+7) 51 (+12) 79
RH % (24H TREND) 34 (+6) 70 (-21) 38
WIND 20FT AM(MPH) LGT/VAR SW 6-10 G25
WIND 20FT PM(MPH) S 3-7 LGT/VAR SW 9-13 G25
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 62 70
MIXING HGT(FT-AGL) 4860 360 5070
TRANSPORT WND (M/S) SW 5 SE 4 SW 12
TRANSPORT WND (MPH) SW 12 SE 8 SW 26
VENT RATE (M/S-M) 11570 230 20780
GOOD POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 10 TO 15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE
LOWER 80S. SOUTH WINDS 15 TO 20 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS AROUND 60.
HIGHS IN THE LOWER 70S. SOUTHWEST WINDS 10 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE LOWER 70S. NORTH WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE LOWER 70S. NORTHEAST WINDS 5 TO 10 MPH.
MOZ061-063-064-202100-
SAINT CHARLES MO-SAINT LOUIS MO-SAINT LOUIS CITY MO-
INCLUDING THE CITIES OF SAINT CHARLES AND SAINT LOUIS
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 71 (+4) 52 (+11) 80
RH % (24H TREND) 31 (+5) 72 (-2) 35
WIND 20FT AM(MPH) LGT/VAR SW 6-10 G23
WIND 20FT PM(MPH) SE 3-7 SE 3-7 SW 9-13 G22
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 60 71
MIXING HGT(FT-AGL) 4490 390 5240
TRANSPORT WND (M/S) S 5 SW 6 SW 12
TRANSPORT WND (MPH) S 10 SW 13 SW 26
VENT RATE (M/S-M) 8160 220 20520
GOOD POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 10 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE
LOWER 80S. SOUTH WINDS 15 TO 20 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS IN THE
LOWER 60S. HIGHS IN THE MID 70S. SOUTHWEST WINDS 10 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER
50S. HIGHS IN THE LOWER 70S. NORTH WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER
50S. HIGHS IN THE LOWER 70S. NORTHEAST WINDS 5 TO 10 MPH.
ILZ064-065-069-070-074-079-100>102-202100-
BOND IL-FAYETTE IL-CLINTON IL-MARION IL-WASHINGTON IL-RANDOLPH IL-
MADISON IL-SAINT CLAIR IL-MONROE IL-
INCLUDING THE CITIES OF VANDALIA, CENTRALIA, SALEM, CHESTER,
SPARTA, ALTON, EDWARDSVILLE, BELLEVILLE, AND CAHOKIA
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+3) 49 (+10) 79
RH % (24H TREND) 33 (+4) 83 (+8) 37
WIND 20FT AM(MPH) LGT/VAR SW 6-10 G19
WIND 20FT PM(MPH) LGT/VAR SE 3-7 SW 11-15 G21
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 57 71
MIXING HGT(FT-AGL) 4280 370 5230
TRANSPORT WND (M/S) SW 3 SE 5 SW 12
TRANSPORT WND (MPH) SW 7 SE 12 SW 26
VENT RATE (M/S-M) 6720 270 21110
FAIR POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS AROUND 80.
SOUTH WINDS 15 TO 20 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS IN THE
LOWER 60S. HIGHS IN THE MID 70S. SOUTHWEST WINDS 10 TO 15 MPH.
SATURDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER
50S. HIGHS IN THE LOWER 70S. NORTH WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE LOWER
50S. HIGHS IN THE LOWER 70S. NORTHEAST WINDS 5 TO 10 MPH.
MOZ018-019-026-027-034>036-042-052-202100-
KNOX MO-LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-
AUDRAIN MO-LINCOLN MO-
INCLUDING THE CITIES OF HANNIBAL, BOWLING GREEN, AND MEXICO
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 72 (+8) 52 (+16) 79
RH % (24H TREND) 34 (+6) 70 (-9) 43
WIND 20FT AM(MPH) SE 3-7 SW 10-14 G27
WIND 20FT PM(MPH) S 6-10 G18 S 4-8 G19 SW 12-16 G27
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 58 69
MIXING HGT(FT-AGL) 4360 400 4330
TRANSPORT WND (M/S) S 7 S 5 SW 14
TRANSPORT WND (MPH) S 15 S 12 SW 31
VENT RATE (M/S-M) 11750 260 20600
GOOD POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 10 TO 15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS AROUND
80. SOUTH WINDS 15 TO 20 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. COOLER. LOWS IN
THE UPPER 50S. HIGHS IN THE UPPER 60S. WEST WINDS 10 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE UPPER 60S. NORTHEAST WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE UPPER 60S. NORTHEAST WINDS 5 TO 10 MPH.
ILZ095>098-202100-
ADAMS IL-BROWN IL-PIKE IL-CALHOUN IL-
INCLUDING THE CITIES OF QUINCY, MOUNT STERLING, AND PITTSFIELD
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 69 (+6) 51 (+15) 79
RH % (24H TREND) 32 (+4) 72 (-9) 42
WIND 20FT AM(MPH) LGT/VAR SW 8-12 G24
WIND 20FT PM(MPH) SE 5-9 G15 SE 4-8 G17 SW 11-15 G24
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 56 69
MIXING HGT(FT-AGL) 4170 380 4510
TRANSPORT WND (M/S) S 6 S 6 SW 14
TRANSPORT WND (MPH) S 14 S 14 SW 31
VENT RATE (M/S-M) 10200 290 20900
GOOD POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE UPPER 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 10 TO 15 MPH.
THURSDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE
LOWER 80S. SOUTH WINDS 15 TO 20 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. NOT AS WARM.
LOWS AROUND 60. HIGHS IN THE LOWER 70S. WEST WINDS 10 TO 15 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE UPPER 60S. NORTH WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE UPPER 60S. NORTHEAST WINDS 5 TO 10 MPH.
ILZ058>060-099-202100-
GREENE IL-MACOUPIN IL-MONTGOMERY IL-JERSEY IL-
INCLUDING THE CITY OF LITCHFIELD
855 AM CDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER CLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+5) 48 (+12) 79
RH % (24H TREND) 29 (+2) 82 (+5) 38
WIND 20FT AM(MPH) LGT/VAR SW 8-12 G22
WIND 20FT PM(MPH) SE 3-7 SE 4-8 G16 SW 12-16 G25
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
1700FT MIXING TEMP 56 69
MIXING HGT(FT-AGL) 4440 380 4570
TRANSPORT WND (M/S) S 4 S 7 SW 13
TRANSPORT WND (MPH) S 9 S 15 SW 29
VENT RATE (M/S-M) 7750 200 20150
FAIR POOR EXCELLENT
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 10 TO 15 MPH.
THURSDAY
MOSTLY CLEAR. LOWS IN THE MID 50S. HIGHS AROUND 80.
SOUTH WINDS 15 TO 20 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS AROUND 60.
HIGHS IN THE LOWER 70S. SOUTHWEST WINDS 15 TO 20 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS AROUND 70. NORTH WINDS 5 TO 10 MPH.
SUNDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS AROUND 70. NORTHEAST WINDS 5 TO 10 MPH.
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