Johnson 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

SOUTH-CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     MOSUNNY   84  64  50 NE3       29.86S HX  85  TC  29   
CAIRO*         MOSUNNY   84  64  50 NE5       29.86S HX  85  TC  29   
EFFINGHAM*     SUNNY     80  62  53 CALM      29.89S HX  81  TC  27   
MARION         PTSUNNY   81  66  61 N5        29.87R HX  83  TC  27   
MT. VERNON     SUNNY     83  60  45 VRB3      29.87S HX  83  TC  28   
CENTRALIA*     SUNNY     81  63  53 CALM      29.87S HX  82  TC  27   
SALEM*         SUNNY     84  61  45 CALM      29.87S HX  84  TC  29   
METROPOLIS*    SUNNY     83  60  45 N7        29.86S HX  83  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. Northeast winds around 5 mph this evening, becoming
light and variable. 
.SUNDAY...Patchy fog in the morning. Sunny. Highs in the upper
80s. North winds around 5 mph, becoming east in the afternoon. 
.SUNDAY NIGHT...Mostly clear. Lows in the lower 60s. Southeast
winds around 5 mph in the evening, becoming light and variable. 
.MONDAY...Mostly sunny. Highs in the mid 80s. South winds 5 to
10 mph. 
.MONDAY NIGHT...Mostly clear. Lows in the upper 60s. South winds
around 5 mph. 
.TUESDAY...Sunny. Highs in the upper 80s. 
.TUESDAY NIGHT...Partly cloudy in the evening, then mostly cloudy
with showers likely with a chance of thunderstorms after
midnight. Lows in the upper 60s. Chance of rain 70 percent. 
.WEDNESDAY...A chance of showers and thunderstorms in the
morning, then showers and thunderstorms likely in the afternoon.
Highs in the mid 80s. Chance of rain 70 percent. 
.WEDNESDAY NIGHT...Showers and thunderstorms likely, mainly in
the evening. Lows in the lower 60s. Chance of rain 60 percent. 
.THURSDAY...Mostly sunny with a chance of showers. A chance of
thunderstorms in the afternoon. Highs in the upper 70s. Chance of
rain 50 percent. 
.THURSDAY NIGHT AND FRIDAY...Mostly cloudy. A chance of showers
and thunderstorms. Lows in the lower 60s. Highs in the upper 70s.
Chance of rain 50 percent. 
.FRIDAY NIGHT...Partly cloudy with a chance of showers. Lows in
the lower 60s. Chance of rain 50 percent. 
.SATURDAY...Mostly sunny with a chance of showers. 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)