Boone 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

(Click image to zoom) or Click Here Satellite images from NOAA Also see NWS Watch/Warning Maps Weathernet's NWS NEXRADS Regional Degree Day Maps Learning About Weather Crop Moisture Index (JAWF) PDSI (NOAA)

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

NORTH CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ROCKFORD       MOSUNNY   86  57  37 S15G24    29.81F HX  85  TC  30   
FREEPORT*      MOSUNNY   86  56  35 SW15G22   29.82S HX  84  TC  30   
ROCHELLE*      PTSUNNY   85  54  34 SW18      29.82F HX  83  TC  29   
DE KALB*       PTSUNNY   82  55  38 S14G26    29.84S HX  82  TC  28   
PERU*          SUNNY     87  57  36 SW14      29.83F HX  85  TC  30   

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

.TONIGHT...Partly cloudy in the evening, then becoming mostly
cloudy late in the evening, then becoming mostly clear late in
the night. A slight chance of showers and thunderstorms in the
evening. Unseasonably mild. Lows around 60. Southwest winds 5 to
10 mph in the evening, becoming northwest after midnight. Chance
of precipitation 20 percent. 
.SUNDAY...Mostly sunny. Continued warm with highs in the lower
80s. Northeast winds 5 to 10 mph. 
.SUNDAY NIGHT...Mostly cloudy. A slight chance of showers and
thunderstorms after midnight. Lows in the upper 50s. Southeast
winds 5 to 10 mph. Chance of precipitation 20 percent. 
.MONDAY...Mostly cloudy. A chance of showers and thunderstorms in
the morning, then showers and thunderstorms likely in the
afternoon. More humid with highs in the mid 80s. South winds
10 to 15 mph with gusts up to 25 mph. Chance of precipitation
60 percent. 
.MONDAY NIGHT...Showers and thunderstorms likely in the evening,
then showers likely with a chance of thunderstorms after
midnight. Lows in the lower 60s. South winds 5 to 10 mph. Chance
of precipitation 60 percent. 
.TUESDAY...Mostly cloudy with a chance of showers and
thunderstorms. Highs in the mid 80s. Chance of precipitation
50 percent. 
.TUESDAY NIGHT...Mostly cloudy. Showers with thunderstorms likely
in the evening, then a chance of showers and thunderstorms after
midnight. Lows in the upper 50s. Chance of precipitation
80 percent. 
.WEDNESDAY...Partly cloudy with a 20 percent chance of showers.
Highs in the lower 70s. 
.WEDNESDAY NIGHT...Mostly clear. Lows in the lower 50s. 
.THURSDAY...Mostly sunny. Highs in the mid 70s. 
.THURSDAY NIGHT...Partly cloudy. Lows in the lower 50s. 
.FRIDAY...Partly cloudy. A chance of showers in the afternoon.
Highs in the mid 70s. Chance of precipitation 30 percent. 
.FRIDAY NIGHT...Partly cloudy. A chance of showers and
thunderstorms in the evening, then a chance of showers after
midnight. Lows in the lower 50s. Chance of precipitation
40 percent. 
.SATURDAY...Partly cloudy in the morning, then becoming mostly
cloudy. A 30 percent chance of showers. Highs in the mid 70s. 

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)