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Cook County, IL Weather and Climate Synopsis

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Weather Summary Hourly Observations Nowcast Agricultural Weather Outlook
7 Day Forecast Medium & Long Range Outlook Almanac Historical Facts

US Weekly Rainfall Departure

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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
450 AM CDT Wed Mar 21 2018

Mostly cloudy skies and gusty northwest winds were seen across
central and southeast Illinois early this morning. Temperatures
around the area at 4 AM, ranged from 27 degrees at Bloomington, to
34 degrees at Flora.

A storm system over West Virginia, with accumulating snow in 
parts of Indiana and Kentucky this morning will slide east today.
Farther west, high pressure will bring cool and dry weather to 
much of the Midwest. Skies will clear and winds will weaken
through the day across Illinois. A fast moving upper level 
disturbance, will bring a chance for rain showers to much of the 
area tomorrow.

Highs today, will range from the middle 30s in southeast Indiana,
to the middle 50s across southwest Missouri. Lows tonight, will 
range from the lower 20s in eastern Indiana, to the middle 30s 
across western portions of Missouri and Iowa.

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

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Regional Hourly Observations For COOK County
Issued at 800 AM CDT WED MAR 21 2018

CHICAGO-OHARE  PTSUNNY   29  21  72 N10       30.02R WCI  20          
CHICAGO-MIDWAY NOT AVBL                                               
AURORA         NOT AVBL                                               
WAUKEGAN       NOT AVBL                                               
DUPAGE AIRPORT NOT AVBL                                               
WHEELING       NOT AVBL                                               
NORTHERLY ISL    N/A     31  22  69 N15         N/A  WCI  20          

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 700am CDT, Wednesday March 21, 2018

Across Illinois...temperatures are near 25 degrees north, near 28 degrees central, and near 33 degrees south. Current sky conditions are cloudy north, fair central, and fair south. In the north, relative humidity is near 74%, and the dew point is near 18 degrees. In the central part of the state, relative humidity is near 78%, and the dew point is near 22 degrees. In the south, relative humidity is near 63%, and the dew point is near 22 degrees. Winds are from the north at 12 mph north, where conditions are favorable for spraying. The wind chill is near 14 degrees north. Winds are from the north at 17 mph with gusts at 24 mph central, where conditions are not favorable for spraying due to strong winds. The wind chill is near 16 degrees central. Winds are variable at 5 mph south, where conditions are favorable for spraying. The wind chill is near 29 degrees south. Based on current available observations, the highest temperature is 35 degrees at Metropolis. The lowest temperature is 23 degrees at Macomb.

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

402 AM CDT Wed Mar 21 2018 /502 AM EDT Wed Mar 21 2018/

 DAY ONE  Today and Tonight.

Flooding is expected along portions of the Kankakee River.

 DAYS TWO THROUGH SEVEN  Thursday through Tuesday.

Friday Night and Saturday  
  Elevated Snow and/or Sleet Risk.
  Limited Ice Accumulation Risk.


There is the likelihood of some wintry precipitation, possibly
accumulating, for part of the area Friday night into Saturday. 
This is most favored south of a Rockford to Joliet to 
Rensselaer line.

Portions of the Kankakee River will remain in flood.


Spotter activation will not be necessary through tonight.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For COOK County, IL
348 AM CDT Wed Mar 21 2018

Cloudy until early afternoon then becoming partly sunny. Highs in the upper 30s near the lake to around 40 inland. Northeast winds 10 to 20 mph with gusts to 25 mph.

Clear. Lows in the mid 20s. North winds 5 to 10 mph in the evening becoming northwest after midnight.

Mostly sunny. Highs in the upper 40s inland
but only in the lower 40s near the lake. North winds 5 to 10 mph.

Mostly clear. Lows in the upper 20s. Northeast winds 5 to 10 mph.

Mostly sunny in the morning then becoming partly cloudy. Highs in the mid 40s inland
but only around 40 near the lake. Northeast winds 5 to 10 mph.

Mostly cloudy. A 50 percent chance of light snow after midnight. Lows in the lower 30s.

Mostly cloudy. Light snow likely and a chance of light rain in the morning, then light rain likely in the afternoon. Highs in the upper 30s. Chance of precipitation 60 percent.

Partly cloudy. Lows in the upper 20s.

Partly cloudy. Highs in the lower 40s inland
but only in the upper 30s near the lake.

Partly cloudy. Lows in the mid 30s.

Partly sunny. Highs around 50.

Mostly cloudy with a 50 percent chance of rain. Lows in the upper 30s.

Rain likely. Highs in the lower 50s inland
but only in the mid 40s near the lake. Chance of precipitation 60 percent.

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
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   MAR 26-30 MAR 28-APR 3    MAR       MAR-MAY                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Below      Below     Normal                      
 Precipitation:      Above        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

Wednesday March 21, 2018 the 80th Day of Year

Declination 0.630000
Distance 0.999721 AU
Rise 07:00 EDT Set 19:13 EDT
Transit Meridian 13:05 EDT
Civil Twilight Begins 06:34 EDT Ends 19:39 EDT

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

A tornado swarm occurred in the Deep South. Between late afternoon and
early the next morning severe thunderstorms spawned 31 tornadoes in
Alabama, Mississippi, Georgia and Tennessee. The tornadoes killed 334
persons and injured 1784 others. Northern Alabama was hardest hit.
Tornadoes in Alabama killed 286 persons and caused five million dollars
damage. (David Ludlum)
Severe thunderstorms spawned thirty-one tornadoes across Arkansas,
Tennessee, Missouri, Mississippi, Alabama and Kentucky. The tornadoes
killed 343 persons and caused 15 million dollars damage. Arkansas and
Tennessee each reported thirteen tornadoes. The towns of Judsonia AR and
Henderson TN were nearly wiped off the map in what proved to be the worst
tornado outbreak of record for Arkansas. A tornado, one and a half miles
wide at times, left a church the only undamaged building at Judsonia.
(David Ludlum) (The Weather Channel)

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