


Zone Forecast Product
Issued by NWS St. Louis, MO
Issued by NWS St. Louis, MO
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
162 FPUS53 KLSX 171755 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 1254 PM CDT Sun Aug 17 2025 ILZ100-101-MOZ061-063-064-180100- Madison IL-Saint Clair IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO- Including the cities of Alton, Edwardsville, Belleville, Cahokia, Saint Charles, and Saint Louis 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with isolated showers and thunderstorms. Near steady temperature in the lower 90s. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 104. .TONIGHT...Mostly cloudy with isolated showers and thunderstorms in the evening, then partly cloudy after midnight. Humid with lows in the upper 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 103 early in the evening. .MONDAY...Mostly sunny. Scattered showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southeast winds around 5 mph. Chance of rain 30 percent. Heat index values up to 107. .MONDAY NIGHT...Partly cloudy. Scattered showers and thunderstorms in the evening. Humid with lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 30 percent. Heat index values up to 105 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 90s. West winds around 5 mph. Chance of rain 30 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. .WEDNESDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the upper 60s. Highs in the mid 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the upper 60s. Highs in the upper 80s. $$ MOZ042-049-050-180100- Audrain MO-Osage MO-Callaway MO- Including the cities of Mexico and Fulton 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with scattered showers and thunderstorms. Hot. Near steady temperature in the mid 90s. East winds around 5 mph. Chance of rain 40 percent. Heat index values up to 105. .TONIGHT...Mostly cloudy with scattered showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 40 percent. .MONDAY...Mostly sunny. Scattered showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Scattered showers and thunderstorms in the evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 100 early in the evening. .TUESDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Humid with highs around 90. West winds around 5 mph. Chance of rain 40 percent. Heat index values up to 101. .TUESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows around 70. Chance of rain 40 percent. .WEDNESDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid 60s. Highs in the lower 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. $$ MOZ041-047-048-180100- Boone MO-Moniteau MO-Cole MO- Including the cities of Columbia and Jefferson City 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with scattered showers and thunderstorms. Hot. Near steady temperature in the mid 90s. Northeast winds around 5 mph. Chance of rain 40 percent. Heat index values up to 104. .TONIGHT...Mostly cloudy with scattered showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 40 percent. Heat index values up to 101 early in the evening. .MONDAY...Sunny. Isolated showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Isolated showers and thunderstorms in the evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening. .TUESDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Humid with highs in the lower 90s. West winds around 5 mph. Chance of rain 40 percent. Heat index values up to 102. .TUESDAY NIGHT...Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT...Mostly clear. Lows in the mid 60s. .THURSDAY...Mostly sunny. Highs in the mid 80s. .THURSDAY NIGHT...Clear. Lows in the mid 60s. .FRIDAY THROUGH SATURDAY...Mostly clear. Highs in the upper 80s. Lows in the mid 60s. $$ ILZ095>097-MOZ018-019-026-027-034>036-180100- Adams IL-Brown IL-Pike IL-Knox MO-Lewis MO-Shelby MO-Marion MO- Monroe MO-Ralls MO-Pike MO- Including the cities of Quincy, Mount Sterling, Pittsfield, Hannibal, and Bowling Green 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Sunny, hot. Near steady temperature in the lower 90s. South winds around 5 mph. Heat index values up to 104. .TONIGHT...Partly cloudy. Isolated showers and thunderstorms in the evening. Humid with lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 103 early in the evening. .MONDAY...Mostly sunny. Humid with highs in the lower 90s. South winds 5 to 10 mph. Heat index values up to 105. .MONDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms after midnight. Humid with lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening. .TUESDAY...Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Humid with highs around 90. West winds around 5 mph. Chance of rain 40 percent. Heat index values up to 102. .TUESDAY NIGHT...Partly cloudy with a slight chance of showers. A chance of thunderstorms, mainly in the evening. Lows around 70. Chance of rain 40 percent. .WEDNESDAY...Partly sunny. Highs in the lower 80s. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid 60s. Highs in the lower 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. $$ ILZ069-070-074-180100- Clinton IL-Marion IL-Washington IL- Including the cities of Centralia and Salem 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with isolated showers and thunderstorms. Highs in the mid 90s. East winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent. Heat index values up to 104. .TONIGHT...Partly cloudy. Isolated showers and thunderstorms in the evening. Patchy fog after midnight. Humid with lows in the mid 70s. East winds around 5 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening. .MONDAY...Mostly sunny. Patchy fog in the morning. Isolated showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 107. .MONDAY NIGHT...Mostly clear. Humid with lows in the mid 70s. Southeast winds around 5 mph. Heat index values up to 104 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 90s. Southwest winds around 5 mph, becoming west around 5 mph in the afternoon. Chance of rain 30 percent. Heat index values up to 105. .TUESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. .WEDNESDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the upper 60s. Highs in the mid 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the upper 60s. Highs in the upper 80s. $$ MOZ074-084-085-099-180100- Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the city of Farmington 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with scattered showers and thunderstorms. Hot. Near steady temperature in the mid 90s. East winds around 5 mph. Chance of rain 40 percent. Heat index values up to 105. .TONIGHT...Mostly cloudy with scattered showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 50 percent. .MONDAY...Mostly sunny. Patchy fog in the morning. Scattered showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Southeast winds around 5 mph. Chance of rain 30 percent. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Scattered showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 30 percent. Heat index values up to 101 early in the evening. .TUESDAY...Sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. West winds around 5 mph. Chance of rain 40 percent. Heat index values up to 104. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy. A chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 40 percent. .WEDNESDAY NIGHT...Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Chance of rain 20 percent. .THURSDAY...Mostly sunny. Highs in the mid 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the upper 80s. $$ MOZ051-052-060-180100- Montgomery MO-Lincoln MO-Warren MO- 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with scattered showers and thunderstorms. Near steady temperature in the lower 90s. East winds around 5 mph. Chance of rain 30 percent. Heat index values up to 105. .TONIGHT...Mostly cloudy with isolated showers and thunderstorms in the evening, then partly cloudy after midnight. Humid with lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .MONDAY...Mostly sunny. Scattered showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 106. .MONDAY NIGHT...Partly cloudy. Scattered showers and thunderstorms in the evening. Humid with lows in the lower 70s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 103 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 90s. West winds around 5 mph. Chance of rain 40 percent. Heat index values up to 103. .TUESDAY NIGHT...Partly cloudy. A chance of showers and thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows around 70. Chance of rain 40 percent. Heat index values up to 100 early in the evening. .WEDNESDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid 60s. Highs in the lower 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. $$ ILZ058-059-098-099-180100- Greene IL-Macoupin IL-Calhoun IL-Jersey IL- 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny. Highs in the lower 90s. Southeast winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 101. .TONIGHT...Mostly cloudy with isolated showers and thunderstorms in the evening, then partly cloudy after midnight. Humid with lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .MONDAY...Mostly sunny. Humid with highs in the lower 90s. Southeast winds 5 to 10 mph. Heat index values up to 102. .MONDAY NIGHT...Partly cloudy. Isolated showers and thunderstorms after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 100 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. West winds around 5 mph. Chance of rain 30 percent. Heat index values up to 100. .TUESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 30 percent. .WEDNESDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid 60s. Highs in the lower 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the mid 80s. $$ ILZ060-064-065-180100- Montgomery IL-Bond IL-Fayette IL- Including the cities of Litchfield and Vandalia 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny. Highs in the lower 90s. Southeast winds 5 to 10 mph with gusts up to 25 mph. Heat index values up to 102. .TONIGHT...Partly cloudy. Patchy fog after midnight. Humid with lows in the mid 70s. Southeast winds around 5 mph. Heat index values up to 102 early in the evening. .MONDAY...Patchy fog in the morning. Mostly sunny. Humid with highs in the lower 90s. Southeast winds around 5 mph. Heat index values up to 105. .MONDAY NIGHT...Mostly clear. Humid with lows in the lower 70s. Southeast winds around 5 mph. Heat index values up to 102 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 90s. Southwest winds around 5 mph. Chance of rain 30 percent. Heat index values up to 103. .TUESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 30 percent. Heat index values up to 100 early in the evening. .WEDNESDAY...Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid 60s. Highs in the mid 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the upper 80s. $$ ILZ079-MOZ075-180100- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with scattered showers and thunderstorms. Hot. Near steady temperature in the mid 90s. East winds around 5 mph. Chance of rain 40 percent. Heat index values up to 107. .TONIGHT...Partly cloudy. Isolated showers and thunderstorms in the evening. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 101 early in the evening. .MONDAY...Mostly sunny. Patchy fog in the morning. Scattered showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Southeast winds around 5 mph. Chance of rain 30 percent. Heat index values up to 108. .MONDAY NIGHT...Mostly clear. Scattered showers and thunderstorms in the evening. Humid with lows in the mid 70s. Southeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 30 percent. Heat index values up to 105 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Southwest winds around 5 mph, becoming west around 5 mph in the afternoon. Chance of rain 40 percent. Heat index values up to 106. .TUESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. .WEDNESDAY...Partly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the upper 60s. Highs in the mid 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the upper 60s. Highs around 90. $$ MOZ059-062-072-073-180100- Gasconade MO-Franklin MO-Crawford MO-Washington MO- Including the cities of Washington, Union, and Sullivan 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with scattered showers and thunderstorms. Hot with highs in the mid 90s. Temperature falling into the lower 90s. East winds around 5 mph. Chance of rain 40 percent. Heat index values up to 104. .TONIGHT...Mostly cloudy with scattered showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 50 percent. .MONDAY...Mostly sunny. Scattered showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 106. .MONDAY NIGHT...Partly cloudy. Scattered showers and thunderstorms in the evening. Lows in the lower 70s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 102 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. Southwest winds around 5 mph, becoming northwest in the afternoon. Chance of rain 50 percent. Heat index values up to 103. .TUESDAY NIGHT...Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 50 percent. .WEDNESDAY...Partly sunny with a slight chance of thunderstorms. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the mid 60s. Highs in the mid 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs in the upper 80s. $$ ILZ102-MOZ065-180100- Monroe IL-Jefferson MO- 1254 PM CDT Sun Aug 17 2025 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM CDT MONDAY... .THIS AFTERNOON...Mostly sunny with scattered showers and thunderstorms. Hot. Near steady temperature in the lower 90s. East winds around 5 mph. Chance of rain 40 percent. Heat index values up to 104. .TONIGHT...Mostly cloudy with isolated showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 101 early in the evening. .MONDAY...Mostly sunny. Scattered showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Southeast winds around 5 mph. Chance of rain 30 percent. Heat index values up to 107. .MONDAY NIGHT...Partly cloudy. Scattered showers and thunderstorms in the evening. Humid with lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 30 percent. Heat index values up to 104 early in the evening. .TUESDAY...Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. West winds around 5 mph. Chance of rain 40 percent. Heat index values up to 107. .TUESDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 105 early in the evening. .WEDNESDAY...Partly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. .WEDNESDAY NIGHT AND THURSDAY...Partly cloudy. Lows in the upper 60s. Highs in the mid 80s. .THURSDAY NIGHT THROUGH SATURDAY...Mostly clear. Lows in the mid 60s. Highs around 90. $$