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Johnson County, IL Weather and Climate Synopsis

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

Weather Summary For Central And Southeast Illinois
National Weather Service Lincoln IL
440 AM CST Sun Dec 17 2017

High clouds overspread central and southeast Illinois overnight.
Early morning temperatures were mild for the season, in the 30s.

A weak weather system will track northeast across the area today,
producing some scattered light rain showers. Patchy drizzle or
sprinkles will linger into Monday, as a weak front shifts through
the state. After this system exits to the east, dry and mild
conditions will prevail over the Midwest, through mid-week.

High temperatures today will range from the mid 30s in northern
Illinois, to near 50 degrees in central Missouri. Lows tonight
will range from the mid 20s in northern Iowa, to the lower 40s in
southern Illinois.

National Ag. Weather Outlook, International Ag. Weather Summary
Current Surface Map, [2nd Source TWC]

Click here for UKAWC Point Agricultural, Lawn & Garden Forecast/Outlook in case of corrupt tables.
Regional Hourly Observations For JOHNSON County
Issued at 500 AM CST SUN DEC 17 2017

SOUTH-CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     CLOUDY    44  33  65 S8        30.13S                  
CAIRO*         DRIZZLE   42  37  80 SW7       30.17R                  
EFFINGHAM*     MOCLDY    41  32  72 S5        30.12R                  
MARION         CLOUDY    44  32  63 S6        30.14S                  
MT. VERNON     CLOUDY    41  33  73 S6        30.12S                  
CENTRALIA*     CLOUDY    43  34  69 S6        30.10S                  
SALEM*         CLOUDY    44  32  63 S8        30.11S                  
METROPOLIS*    RAIN      41  34  75 CALM      30.18R                  

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


Current Agricultural Weather Conditions in Illinois
Based on observations at 500am CST, Sunday December 17, 2017

Across Illinois...temperatures are near 33 degrees north, near 41 degrees central, and near 41 degrees south. Current sky conditions are cloudy north, cloudy central, and cloudy south. In the north, relative humidity is near 92%, and the dew point is near 31 degrees. In the central part of the state, relative humidity is near 65%, and the dew point is near 30 degrees. In the south, relative humidity is near 73%, and the dew point is near 33 degrees. There is patchy fog north. Winds are from the northeast at 7 mph north, where conditions are favorable for spraying. The wind chill is near 27 degrees north. Winds are from the southwest at 10 mph central, where conditions are favorable for spraying. Winds are from the south at 6 mph south, where conditions are favorable for spraying. The livestock cold stress index is in the no stress category north, no stress category central, and no stress category south. Based on current available observations, the highest temperature is 45 degrees at Pittsfield. The lowest temperature is 27 degrees at Lansing.


Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this county will these
forecasts be issued. Currently, there is no short term forecast in effect.

US Radar, All NWS Radars (In near-real time),Livestock Heat Stress Index (LSI), Wind Chill Map
Hazardous Weather Outlook For JOHNSON County,IL

418 AM CST Sun Dec 17 2017

 DAY ONE  Today and Tonight

No hazardous weather is expected at this time.

 DAYS TWO THROUGH SEVEN  Monday through Saturday

There is a chance for a light wintry mix late Friday night 
following the passage of a cold front Friday afternoon.

 SPOTTER INFORMATION STATEMENT  

Spotter activation will not be needed.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For JOHNSON County, IL
403 AM CST Sun Dec 17 2017

TODAY
Cloudy. Light rain in the morning, then a slight chance of light rain in the afternoon. Highs in the mid 40s. South winds around 5 mph. Chance of precipitation 80 percent.

TONIGHT
Cloudy. Areas of fog. Areas of drizzle. Lows in the lower 40s. Southwest winds around 5 mph.

MONDAY
Mostly cloudy. Areas of fog in the morning. Areas of drizzle in the morning. Highs in the lower 50s. Southwest winds around 5 mph.

MONDAY NIGHT
Mostly cloudy. Lows in the mid 40s. Southwest winds 5 to 10 mph.

TUESDAY
Mostly cloudy. Highs in the upper 50s. West winds 5 to 10 mph.

TUESDAY NIGHT
Partly cloudy. A 20 percent chance of light rain after midnight. Lows in the upper 30s.

WEDNESDAY
Mostly sunny. Highs around 50.

WEDNESDAY NIGHT
Mostly clear. Lows in the lower 30s.

THURSDAY
Mostly sunny. Highs in the mid 50s.

THURSDAY NIGHT
Mostly cloudy. A 40 percent chance of rain showers after midnight. Lows around 40.

FRIDAY
Mostly cloudy. A chance of rain showers in the morning, then rain showers likely in the afternoon. Highs around 50. Chance of precipitation 70 percent.

FRIDAY NIGHT
Partly cloudy. A chance of rain showers in the evening, then a slight chance of snow showers after midnight. Lows in the upper 20s. Chance of precipitation 50 percent.

SATURDAY
Partly sunny. Highs in the lower 40s.

12-48 Hr Surface, 12-48 Hr ETA 500mb/Sfc, TWC Forecast, Fire Danger, Day 1 Precip, Day 2 Precip, Days 1-5 Precip
NGM 60 Hr Forecast Meteograms : Springfield , Peoria , Quad City , Chicago (O'Hare) , Rockford , Severe Weather Pot.-Day 1, Day 2


Medium & Long Range Outlook For Illinois
                             ILLINOIS                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   DEC 22-26    DEC 24-30    DEC       DEC-FEB                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below     Normal     Normal                      
 Precipitation:     Normal       Normal     Normal      Above                      

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
MRF 10-Day Forecast Meteograms : Springfield , Peoria , Quad City , Chicago (O'Hare) , Rockford

Almanac Information

Sunday December 17, 2017 the 351th Day of Year

---------------------------------------------------
SUN
Declination -23.380000
Distance 0.999725 AU
Rise 08:15 EST Set 17:36 EST
Transit Meridian 12:55 EST
Civil Twilight Begins 07:45 EST Ends 18:06 EST

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


Historical Weather And Climate Facts For Today

DECEMBER 17TH
HISTORIC WEATHER EVENTS
...1884...
A three week blockade of snow began at Portland OR. A record December total
of 34 inches was received. (David Ludlum)
...1924...
A severe icestorm struck central Illinois. It coated the ground with nearly
two inches of glaze at Springfield. The storm caused 21 million dollars
damage along with much hardship. Ice was on the trees until the 4th of
January, and electricity was not restored until January 10th. (David
Ludlum)
...1929...
An icestorm in western New York State resulted in much damage and hardship.
A Buffalo report stated, "one was kept awake by the breaking limbs, which
snapped off with a report much louder than a rifle shot." (17th-18th) (The
Weather Channel)
...1987...
A storm in the southwestern U.S. brought heavy rain and heavy snow to parts
of California, Nevada, Arizona, Utah and New Mexico. Charleston NV was
blanketed with 12 inches of snow. Lake Havasu City AZ was drenched with
2.26 inches of rain. (Storm Data) (The National Weather Summary)
...1988...
Squalls brought locally heavy snow to the southeastern shores of Lake
Michigan. Totals in Michigan ranged up to 14 inches at Harvey. Totals in
Ohio ranged up to 16 inches at Chardon. (The National Weather Summary)
(Storm Data)
...1989...
Twenty-one cities from Kentucky to Pennsylvania reported record low
temperatures for the date, including Columbus OH with a reading of 12
degrees below zero. Heavy snow continued in the Colorado Rockies. Vail
received 65 inches of snow between the 14th and the 18th of December.
Steamboat Springs was buried under 74 inches, and reported a total of 108
inches of snow between the 10th and the 18th of the month. (The National
Weather Summary) (Storm Data)

Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky