FNUS53 KLSX 200945 FWFLSX Fire Weather Planning Forecast for Eastern/Central MO and Southwest IL National Weather Service Saint Louis MO 444 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 444 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 (+5) 49 (+10) 79 RH % (24h trend) 30 (+3) 70 (-12) 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. $$ MOZ074-075-085-202100- Saint Francois MO-Sainte Genevieve MO-Madison MO- Including the cities of Farmington and Fredericktown Ranger District 444 AM CDT Mon Apr 20 2026 Today Tonight Tue Cloud Cover Clear Clear Mclear Precip Type None None None Chance Precip (%) 0 0 0 Chance of Thunder (%) 0 0 0 Temp (24h trend) 73 (+5) 49 (+10) 79 RH % (24h trend) 36 (+8) 73 (-5) 31 Wind 20ft AM(mph) lgt/var SW 5-9 G20 Wind 20ft PM(mph) lgt/var S 3-7 SW 8-12 G20 Precip Amount 0.00 0.00 0.00 Precip Duration 1700ft mixing temp 63 72 Mixing Hgt(ft-agl) 5150 320 5650 Transport Wnd (m/s) SW 5 SW 6 SW 11 Transport Wnd (mph) SW 10 SW 14 SW 24 Vent Rate (m/s-m) 10380 40 21930 Good Poor Excellent Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly clear. Lows in the lower 50s. Highs in the upper 70s. Southwest winds 5 to 10 mph. .THURSDAY...Partly cloudy. Lows in the mid 50s. Highs around 80. South winds 10 to 15 mph. .FRIDAY...Mostly cloudy with showers likely and a chance of thunderstorms. Lows in the lower 60s. Highs in the mid 70s. Southwest winds 10 to 15 mph. .SATURDAY...Mostly cloudy. Showers likely and a chance of thunderstorms. Lows in the lower 50s. Highs in the mid 70s. North winds 5 to 10 mph. .SUNDAY...Partly cloudy. A chance of showers. Lows in the lower 50s. Highs in the lower 70s. Northeast winds 5 to 10 mph. $$ 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 444 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) 33 (+6) 71 (-5) 42 Wind 20ft AM(mph) SE 3-7 G15 SW 8-12 G26 Wind 20ft PM(mph) S 4-8 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. $$ MOZ051-059-060-062-065-202100- Montgomery MO-Gasconade MO-Warren MO-Franklin MO-Jefferson MO- Including the cities of Washington, Union, and Sullivan 444 AM CDT Mon Apr 20 2026 Today Tonight Tue Cloud Cover Clear Mclear Mclear Precip Type None None None Chance Precip (%) 0 0 0 Chance of Thunder (%) 0 0 0 Temp (24h trend) 73 (+6) 51 (+12) 79 RH % (24h trend) 36 (+8) 71 (-7) 38 Wind 20ft AM(mph) lgt/var SW 6-10 G25 Wind 20ft PM(mph) S 3-7 lgt/var SW 9-13 G25 Precip Amount 0.00 0.00 0.00 Precip Duration 1700ft mixing temp 62 70 Mixing Hgt(ft-agl) 4860 360 5070 Transport Wnd (m/s) SW 5 SE 4 SW 12 Transport Wnd (mph) SW 12 SE 8 SW 26 Vent Rate (m/s-m) 11570 230 20780 Good Poor Excellent Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly clear. Lows in the mid 50s. Highs in the upper 70s. Southwest winds 10 to 15 mph. .THURSDAY...Partly cloudy. Lows in the upper 50s. Highs in the lower 80s. South winds 15 to 20 mph. .FRIDAY...Showers and a chance of thunderstorms. Lows around 60. Highs in the lower 70s. Southwest winds 10 to 15 mph. .SATURDAY...Partly cloudy. A chance of showers. Lows in the upper 40s. Highs in the lower 70s. North winds 5 to 10 mph. .SUNDAY...Partly cloudy. A chance of showers. Lows in the upper 40s. Highs in the lower 70s. Northeast winds 5 to 10 mph. $$ MOZ061-063-064-202100- Saint Charles MO-Saint Louis MO-Saint Louis City MO- Including the cities of Saint Charles and Saint Louis 444 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) 51 (+10) 80 RH % (24h trend) 32 (+6) 74 (+4) 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. $$ ILZ064-065-069-070-074-079-100>102-202100- Bond IL-Fayette IL-Clinton IL-Marion IL-Washington IL-Randolph IL- Madison IL-Saint Clair IL-Monroe IL- Including the cities of Vandalia, Centralia, Salem, Chester, Sparta, Alton, Edwardsville, Belleville, and Cahokia 444 AM CDT Mon Apr 20 2026 Today Tonight Tue Cloud Cover Clear Mclear Mclear Precip Type None None None Chance Precip (%) 0 0 0 Chance of Thunder (%) 0 0 0 Temp (24h trend) 68 (+3) 47 (+8) 79 RH % (24h trend) 33 (+4) 84 (+12) 37 Wind 20ft AM(mph) lgt/var SW 6-10 G19 Wind 20ft PM(mph) lgt/var SE 3-7 SW 11-15 G21 Precip Amount 0.00 0.00 0.00 Precip Duration 1700ft mixing temp 57 71 Mixing Hgt(ft-agl) 4280 370 5230 Transport Wnd (m/s) SW 3 SE 5 SW 12 Transport Wnd (mph) SW 7 SE 12 SW 26 Vent Rate (m/s-m) 6720 270 21110 Fair Poor Excellent Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly clear. Lows in the mid 50s. Highs in the upper 70s. Southwest winds 5 to 10 mph. .THURSDAY...Mostly clear. Lows in the upper 50s. Highs around 80. South winds 15 to 20 mph. .FRIDAY...Showers and a chance of thunderstorms. Lows in the lower 60s. Highs in the mid 70s. Southwest winds 10 to 15 mph. .SATURDAY...Mostly cloudy. A chance of showers. Lows in the lower 50s. Highs in the lower 70s. North winds 5 to 10 mph. .SUNDAY...Partly cloudy. A chance of showers. Lows in the lower 50s. Highs in the lower 70s. Northeast winds 5 to 10 mph. $$ 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 444 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 (+7) 51 (+14) 79 RH % (24h trend) 35 (+7) 73 (+1) 43 Wind 20ft AM(mph) SE 3-7 G16 SW 10-14 G27 Wind 20ft PM(mph) SE 6-10 G17 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. $$ ILZ095>098-202100- Adams IL-Brown IL-Pike IL-Calhoun IL- Including the cities of Quincy, Mount Sterling, and Pittsfield 444 AM CDT Mon Apr 20 2026 Today Tonight Tue Cloud Cover Clear Mclear Mclear Precip Type None None None Chance Precip (%) 0 0 0 Chance of Thunder (%) 0 0 0 Temp (24h trend) 69 (+6) 51 (+15) 79 RH % (24h trend) 32 (+4) 77 (+4) 42 Wind 20ft AM(mph) lgt/var SW 8-12 G24 Wind 20ft PM(mph) SE 5-9 G15 SE 4-8 G17 SW 11-15 G24 Precip Amount 0.00 0.00 0.00 Precip Duration 1700ft mixing temp 56 69 Mixing Hgt(ft-agl) 4170 380 4510 Transport Wnd (m/s) S 6 S 6 SW 14 Transport Wnd (mph) S 14 S 14 SW 31 Vent Rate (m/s-m) 10200 290 20900 Good Poor Excellent Remarks...None. .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY...Mostly clear. Lows in the upper 50s. Highs in the upper 70s. Southwest winds 10 to 15 mph. .THURSDAY...Partly cloudy. Lows in the upper 50s. Highs in the lower 80s. South winds 15 to 20 mph. .FRIDAY...Showers and a chance of thunderstorms. Not as warm. Lows around 60. Highs in the lower 70s. West winds 10 to 15 mph. .SATURDAY...Partly cloudy. A chance of showers. Lows in the upper 40s. Highs in the upper 60s. North winds 5 to 10 mph. .SUNDAY...Partly cloudy. A chance of showers. Lows in the upper 40s. Highs in the upper 60s. Northeast winds 5 to 10 mph. $$ ILZ058>060-099-202100- Greene IL-Macoupin IL-Montgomery IL-Jersey IL- Including the city of Litchfield 444 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) 67 (+4) 47 (+11) 79 RH % (24h trend) 29 (+2) 84 (+13) 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. $$