Madison County, Illinois Weather and Climate Synopsis

Regional Hourly Observations Nowcast: 0-6 Hour Forecast Forecast: 7 Day Forecast Medium & Long Range Outlook Almanac Historical Facts

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A joint service of the UK Ag Weather Center and the National Weather Service.

Current Surface Map, [TWC], Yesterday's Highs , Lows
Map of 24 Hr Rainfall (7AM - 7AM EST), 7 Day Rainfall Animation

SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          MOSUNNY   84  59  42 VRB5      29.87S HX  84  TC  29   
CAHOKIA*       SUNNY     86  62  44 SE6       29.85S HX  86  TC  30   
SPARTA*        SUNNY     82  60  46 CALM      29.88S HX  82  TC  28   

Current Temperatures, Dewpoint Map, RH, Wind, Regional Obs, Surface 4-Panel
Meteograms : Springfield , Peoria , Quad City , Chicago (O'Hare) , Rockford

.TONIGHT...Mostly clear. Patchy fog after midnight. Lows in the
lower 60s. South winds around 5 mph. 
.SUNDAY...Patchy fog in the morning. Sunny. Highs in the upper
80s. South winds 5 to 10 mph. 
.SUNDAY NIGHT...Mostly clear in the evening, then becoming partly
cloudy. Lows in the mid 60s. South winds 5 to 10 mph. 
.MONDAY...Mostly sunny. A slight chance of showers and
thunderstorms in the afternoon. Highs in the upper 80s. South
winds 5 to 10 mph with gusts up to 20 mph. Chance of rain
20 percent. 
.MONDAY NIGHT...Partly cloudy with a slight chance of showers and
thunderstorms. Lows in the upper 60s. South winds 5 to 10 mph.
Chance of rain 20 percent. 
.TUESDAY...Sunny. A slight chance of showers and thunderstorms in
the afternoon. Highs in the lower 90s. Chance of rain 20 percent.
.TUESDAY NIGHT...Showers with thunderstorms likely in the
evening, then showers likely with a chance of thunderstorms after
midnight. Lows in the mid 60s. Chance of rain 80 percent. 
.WEDNESDAY AND WEDNESDAY NIGHT...Partly cloudy. A chance of
showers and thunderstorms. Highs in the upper 70s. Lows in the
upper 50s. Chance of rain 50 percent. 
.THURSDAY...Sunny. A slight chance of showers and thunderstorms
in the afternoon. Highs in the lower 80s. Chance of rain
20 percent. 
.THURSDAY NIGHT...Partly cloudy in the evening, then becoming
mostly cloudy. A chance of thunderstorms. A chance of showers.
Lows in the lower 60s. Chance of rain 50 percent. 
.FRIDAY...Partly sunny with a chance of showers and
thunderstorms. Highs in the lower 80s. Chance of rain 50 percent.
.FRIDAY NIGHT...Partly cloudy with a chance of showers. A chance
of thunderstorms, mainly in the evening. Lows in the lower 60s.
Chance of rain 50 percent. 
.SATURDAY...Mostly 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 lower 80s. Chance of rain
40 percent. 

12-48 Hr Surface, 12-48 Hr ETA 500mb/Sfc, TWC Forecast, Fire Danger, Day 1 Precip, Day 2
NGM 60 Hr Forecast Meteograms : Springfield , Peoria , Quad City , Chicago (O'Hare) , Rockford ,

                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY     120 DAY    180 DAY
                                           NOV05   NOV05-JAN06 DEC05-FEB06 FEB06-APR06
                 -----------  -----------  --------  ---------  ---------  ---------
   Temperature:      Below        Below      Above     Normal     Normal     Normal
 Precipitation:      Below        Below     Normal     Normal     Normal     Normal

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy

Saturday May 18, 2024 the 139th Day of Year

---------------------------------------------------
SUN
Declination 19.880000
Distance 0.999717 AU
Rise 06:41 EDT Set 21:11 EDT
Transit Meridian 13:55 EDT
Civil Twilight Begins 06:11 EDT Ends 21:41 EDT

Calculations made for central point in the state.
Time in ET -- and will vary due to location and
elevation -- Priddy

////////////////////////////
MAY 18TH...HISTORIC WEATHER EVENTS
...1825...
A tornado (said to have crossed all of the state of Ohio) smashed into the
log cabin settlement of Burlington, northeast of Columbus. (David Ludlum)
...1960...
Salt Lake City UT received an inch of snow. It marked their latest
measurable snowfall of record. (The Weather Channel)
...1980...
Mount Saint Helens (in Washington State) erupted spewing ash and smoke
sixty-three thousand feet into the air. Heavy ash covered the ground to the
immediate northwest, and small particles were carried to the Atlantic
coast. (David Ludlum)