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Cook 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
433 AM CST Sat Dec 16 2017

Clear skies and seasonably mild temperatures prevailed over
central and southeast Illinois overnight. Early morning readings
were in the lower to middle 30s.

Southwest winds will blow today, ahead of low pressure over the
Plains. This will bring a substantial warming trend to the region,
with highs reaching 10 to 15 degrees above normal. As the weather
system to the southwest approaches on Sunday, scattered rain
showers will overspread the area. Drier weather will move in from
the west on Monday, and temperatures will remain above normal.

High temperatures today will range from the mid 40s in northern
Illinois, to the mid 60s in central Missouri. Lows tonight will
range from the mid 20s in northern Illinois, to the lower 40s in
central 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 COOK County
Issued at 400 AM CST SAT DEC 16 2017

NORTHEAST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  CLOUDY    37  23  56 SW15      29.82F WCI  28          
CHICAGO-MIDWAY CLOUDY    38  24  57 SW13      29.84F WCI  30          
AURORA         CLOUDY    35  24  64 S10       29.83F WCI  27          
LANSING*       CLOUDY    35  26  69 SW16      29.87F WCI  25          
JOLIET*        CLOUDY    37  26  62 S9        29.86F WCI  31          
WAUKEGAN       CLOUDY    35  25  66 SW9       29.80F WCI  28          
DUPAGE AIRPORT CLOUDY    35  24  64 S12       29.82F WCI  27          
KANKAKEE*      CLOUDY    34  24  65 SW15      29.89F WCI  24          
WHEELING       CLOUDY    38  24  57 SW12G20   29.83F WCI  30          
MORRIS*        CLOUDY    36  24  64 SW12      29.85F WCI  27          
ROMEOVILLE*    CLOUDY    36  25  64 SW14      29.84F WCI  27          
NORTHERLY ISL    N/A     37  22  54 S10         N/A  WCI  30          

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 400am CST, Saturday December 16, 2017

Across Illinois...temperatures are near 35 degrees north, near 32 degrees central, and near 26 degrees south. Current sky conditions are cloudy north, clear central, and partly cloudy south. In the north, relative humidity is near 61%, and the dew point is near 23 degrees. In the central part of the state, relative humidity is near 72%, and the dew point is near 24 degrees. In the south, relative humidity is near 96%, and the dew point is near 25 degrees. Winds are from the southwest at 12 mph north, where conditions are favorable for spraying. The wind chill is near 27 degrees north. Winds are from the southwest at 16 mph central, where conditions are not favorable for spraying due to strong winds. The wind chill is near 21 degrees central. Winds are from the southwest at 10 mph south, where conditions are favorable for spraying. The wind chill is near 16 degrees south. 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 38 degrees at Wheeling and Midway Airport. The lowest temperature is 26 degrees at Mount Vernon.


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 COOK County,IL

356 AM CST Sat Dec 16 2017 /456 AM EST Sat Dec 16 2017/

 DAY ONE  Today and Tonight.

  No hazardous weather is expected at this time.

 DAYS TWO THROUGH SEVEN  Sunday through Friday.

Sunday and Monday  
  Limited Fog Risk.

 SPOTTER INFORMATION STATEMENT  

Spotter activation will not be necessary through tonight.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For COOK County, IL
327 AM CST Sat Dec 16 2017

TODAY
Partly sunny early in the morning then clearing. Highs in the mid 40s. Southwest winds 10 to 15 mph.

TONIGHT
Partly cloudy. Lows in the upper 20s in the suburbs
but in the lower 30s downtown. Southeast winds 5 to 10 mph.

SUNDAY
Cloudy. A 30 percent chance of light rain in the afternoon. Highs around 40. South winds 5 to 10 mph.

SUNDAY NIGHT
Cloudy. Patchy fog after midnight. Slight chance of drizzle after midnight. Lows in the mid 30s. Southwest winds 5 to 10 mph.

MONDAY
Mostly cloudy. Patchy fog in the morning. Slight chance of drizzle in the morning. Highs in the lower 40s. Southwest winds 10 to 15 mph.

MONDAY NIGHT
Partly cloudy. Lows in the mid 30s.

TUESDAY
Partly cloudy in the morning then clearing. Highs in the mid 40s.

TUESDAY NIGHT
Clear. Lows in the mid 20s.

WEDNESDAY AND WEDNESDAY NIGHT
Partly cloudy. Highs in the upper 30s. Lows in the upper 20s.

THURSDAY
Mostly cloudy. Chance of rain and snow in the morning, then a chance of rain in the afternoon. Highs around 40. Chance of precipitation 40 percent.

THURSDAY NIGHT
Snow and rain likely in the evening, then snow after midnight. Lows in the mid 20s. Chance of precipitation 80 percent.

FRIDAY
Mostly cloudy with a 50 percent chance of snow. 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 21-25    DEC 23-29    DEC       DEC-FEB                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below     Normal     Normal                      
 Precipitation:      Above        Above     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

Saturday December 16, 2017 the 350th Day of Year

---------------------------------------------------
SUN
Declination -23.350000
Distance 0.999725 AU
Rise 08:14 EST Set 17:36 EST
Transit Meridian 12:55 EST
Civil Twilight Begins 07:45 EST Ends 18:05 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 16TH
HISTORIC WEATHER EVENTS
...1835...
New England experienced one of their coldest days of record. At noon on
that bitterly cold Wednesday the mercury stood at four degrees below at
Boston, 15 degrees below at Norfolk CT, and 17 degrees below at Hanover NH.
The temperature at Boston was 12 degrees below zero by sunset. Gale force
winds accompanied the severe cold, and that night a great New York City
fire destroyed much of the financial district. (David Ludlum)
...1869...
A bill was introduced in the House of Representatives, 41st Congress, 
calling for the taking [of] meteorological observations at the military 
stations in the interior of the continent, and for giving notice on the 
northern lakes and Atlantic seaboard of the approach and force of storms. 
This would be signed in to law February 9, 1870, by President Grant, 
establishing what would come to be called the National Weather Service. You 
can see the actual bill on-line at: 
 here.
...1917...
An ice jam closed the Ohio River between Warsaw KY and Rising Sun IN. The
thirty foot high ice jam held for 58 days, and backed up the river a
distance of 100 miles. (David Ludlum)
...1987...
A Pacific storm battered the coast of California with rain and high winds,
and dumped heavy snow on the mountains of California. Winds along the coast
gusted to 70 mph at Point Arguello, and winds in the Tehachapi Mountains of
southern California gusted to 100 mph at Wheeler Ridge. Snowfall totals
ranged up to 24 inches at Mammoth Mountain. Snow fell for two minutes at
Malibu Beach, and Disneyland was closed due to the weather for only the
second time in twenty-four years. A winter storm which began in the
Southern Rockies four days earlier finished its course producing snow and
high winds in New England. Snowfall totals ranged up to 19 inches at
Blanchard ME. (The National Weather Summary) (Storm Data)
...1988...
Fairbanks AK reported freezing rain and record warm temperatures. The
afternoon high of 41 degrees was 43 degrees above normal. Snow and high
winds continued to plague the mountains of southern California. Mount
Wilson CA reported two inches of rain in six hours during the early
morning, and a storm total of more than 3.50 inches of rain. (The National
Weather Summary)
...1989...
Fifty-seven cities from the Southern and Central Plains to the Appalachians
reported record low temperatures for the date, including North Platte NE
with a reading of 17 degrees below zero. Squalls in the Great Lakes Region
produced 18 inches of snow at Syracuse NY, and 30 inches at Carlisle IND.
Low pressure brought heavy snow to northern New England, with 18 inches
reported at Derby VT and Saint Johnsbury VT. (The National Weather Summary)
(Storm Data)

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