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Grundy 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
318 PM CST Sun Dec 17 2017
Cloudy skies were seen across central and southeast Illinois,  
through the afternoon hours. A few light showers were seen, mainly
west of I 55, through the afternoon, as well. Temperatures across
the area at 3 p.m., ranged from 44 degrees at Olney, to 50 degrees
at Springfield.

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

Overnight low temperatures, will range from the 20s across
portions of Iowa and Wisconsin, to the middle 40s across the
Missouri bootheel.

High temperatures on Monday, will range from the 30s across
Wisconsin, to near 60 degrees across southwest Missouri.

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 GRUNDY County
Issued at 700 PM CST SUN DEC 17 2017

NORTHEAST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  CLOUDY    41  30  65 SW6       29.99R                  
CHICAGO-MIDWAY CLOUDY    43  33  68 W3        30.00R                  
AURORA         CLOUDY    40  31  70 SW6       30.00S                  
LANSING*       CLOUDY    42  38  84 SW8       30.01S                  
JOLIET*        CLOUDY    46  37  71 CALM      30.01S                  
WAUKEGAN       CLOUDY    33  31  92 CALM      29.99R FOG              
DUPAGE AIRPORT CLOUDY    39  32  76 SW5       29.99R                  
KANKAKEE*      LGT RAIN  43  37  78 S7        30.04R                  
WHEELING       CLOUDY    38  35  89 CALM      30.01R                  
MORRIS*        CLOUDY    43  35  72 W5        30.00S                  
ROMEOVILLE*    CLOUDY    40  32  70 CALM      30.01S                  
NORTHERLY ISL    N/A     38  33  82 CALM        N/A                   

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 700pm CST, Sunday December 17, 2017

Across Illinois...temperatures are near 35 degrees north, near 45 degrees central, and near 44 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 33 degrees. In the central part of the state, relative humidity is near 79%, and the dew point is near 39 degrees. In the south, relative humidity is near 93%, and the dew point is near 42 degrees. There is patchy fog north and south. Winds are from the southeast at 3 mph north, where conditions are favorable for spraying. Winds are from the south at 13 mph central, where conditions are not favorable for spraying due to strong winds. 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 48 degrees at Belleville and Alton. The lowest temperature is 33 degrees at Waukegan.


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 GRUNDY County,IL

157 PM CST Sun Dec 17 2017 /257 PM EST Sun Dec 17 2017/

 DAY ONE  This Afternoon and Tonight.

WEATHER HAZARDS EXPECTED:

  Elevated Fog Risk tonight.

DISCUSSION:

Areas of fog or drizzle are expected tonight. There could be some
patchy dense fog also. 

 DAYS TWO THROUGH SEVEN  Monday through Saturday.

Monday  
  Elevated Fog Risk in the morning.

 SPOTTER INFORMATION STATEMENT  

Spotter activation will not be necessary through tonight.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For GRUNDY County, IL
234 PM CST Sun Dec 17 2017

TONIGHT
Cloudy with a 30 percent chance of light rain. Areas of fog. Temperatures nearly steady in the upper 30s. Southwest winds 5 to 10 mph.

MONDAY
Cloudy in the morning then becoming partly sunny. Areas of fog in the morning. Highs in the mid 40s. Southwest winds 10 to 15 mph.

MONDAY NIGHT
Partly cloudy. Lows in the upper 30s. Southwest winds 10 to 15 mph.

TUESDAY
Partly cloudy. Highs around 50. West winds 10 to 15 mph.

TUESDAY NIGHT
Mostly clear. Lows in the mid 20s. Northwest winds 5 to 10 mph.

WEDNESDAY
Partly cloudy. Highs around 40.

WEDNESDAY NIGHT
Partly cloudy. Lows in the upper 20s.

THURSDAY
Mostly cloudy. Highs in the mid 40s.

THURSDAY NIGHT
Mostly cloudy. Lows in the mid 30s.

FRIDAY
Mostly cloudy with a 40 percent chance of rain. Highs in the mid 40s.

FRIDAY NIGHT
Mostly cloudy. Chance of rain and snow in the evening. Lows in the lower 20s. Chance of precipitation 30 percent.

SATURDAY
Partly cloudy. Highs in the lower 30s.

SATURDAY NIGHT AND SUNDAY
Mostly cloudy. Lows 16 to 20. Highs in the lower 30s.

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 23-27 DEC 25-DEC 31    DEC       DEC-FEB                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below     Normal     Normal                      
 Precipitation:     Normal        Below     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