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Grundy 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

US Weekly Temperature 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
214 PM CDT Thu Mar 22 2018

High pressure stretched across the Mississippi River Valley on
Thursday, bringing mostly sunny skies and slightly warmer air to 
central and southeast Illinois. Early afternoon temperatures were 
in the upper 40s to lower 50s.

A late season winter storm will develop across the Midwest on
Friday, and persist into Saturday. This system will spread rain
across the region from the southwest, beginning Friday afternoon.
The rain will change to snow Friday night, from northeast Iowa, 
southeast into northern Illinois, and central Indiana. Several
inches of accumulation is possible in these areas, by Saturday
afternoon. Farther south where warmer temperatures will be found,
locally heavy rain of 1 to 1.5 inches is expected, for much of 
central and southern Illinois.

Low temperatures tonight will range from the mid 20s in northern
Illinois, to near 50 degrees in southern Missouri. Highs on Friday
will range from the mid 40s in northern Indiana, to the mid 60s in
southern 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 400 PM CDT THU MAR 22 2018

CHICAGO-OHARE  FAIR      46  17  31 E12       30.27F                  
CHICAGO-MIDWAY FAIR      44  16  32 E12       30.29F                  
AURORA         FAIR      49  18  29 VRB7      30.28F                  
LANSING*       FAIR      44  22  41 NE7       30.30F                  
JOLIET*        FAIR      49  18  29 N3        30.29S                  
WAUKEGAN       FAIR      39  24  55 E9        30.29S WCI  33          
DUPAGE AIRPORT FAIR      48  14  25 SW7       30.27F                  
KANKAKEE*      FAIR      48  15  26 MISG      30.30F                  
WHEELING       FAIR      45  19  35 SE7       30.30F                  
MORRIS*        FAIR      49  21  32 N3        30.28F                  
ROMEOVILLE*    FAIR      47  17  29 NW5       30.29S                  
NORTHERLY ISL    N/A     38  25  60 E8          N/A  WCI  32          

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 400pm CDT, Thursday March 22, 2018

Across Illinois...temperatures are near 49 degrees north, near 53 degrees central, and near 52 degrees south. Current sky conditions are fair north, partly sunny central, and cloudy south. In the north, relative humidity is near 28%, and the dew point is near 17 degrees. In the central part of the state, relative humidity is near 29%, and the dew point is near 22 degrees. In the south, relative humidity is near 41%, and the dew point is near 29 degrees. Winds are from the north at 6 mph north, where conditions are favorable for spraying. Winds are from the northwest at 6 mph central, where conditions are favorable for spraying. Winds are from the west at 6 mph south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 56 degrees at Metropolis. The lowest temperature is 38 degrees at Northerly Island.

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

333 PM CDT Thu Mar 22 2018 /433 PM EDT Thu Mar 22 2018/

 DAY ONE  Tonight.

Flooding is expected to continue along portions of the Kankakee 

 DAYS TWO THROUGH SEVEN  Friday through Wednesday.

  Elevated Ice Accumulation Risk Friday night.
  Elevated Snow Risk Friday night.
  Limited Non Thunderstorm Wind Risk.
  Elevated Ice Accumulation Risk.
  Elevated Snow Risk.


A late season winter storm is expected to produce a prolonged
period of wet snowfall from Friday night through Saturday
afternoon. The largest snow accumulations presently are expected
along a corridor from Lee and Ogle counties in Illinois southeast
across La Salle County toward Benton County in Indiana.
Additionally, some areas well south of Interstate 80 may see 
minor ice accumulation.

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 GRUNDY County, IL
314 PM CDT Thu Mar 22 2018


Partly cloudy early in the evening then clearing. Lows in the upper 20s. North winds around 5 mph in the evening shifting to the east after midnight.

Mostly sunny in the morning then becoming partly sunny. Highs in the upper 40s. East winds 10 to 15 mph.

Cloudy. Chance of light snow and light rain in the evening, then snow after midnight. Snow accumulation of 2 to 4 inches. Lows in the lower 30s. East winds 10 to 20 mph. Gusts up to 30 mph after midnight. Chance of precipitation 80 percent.

Snow. Snow may be heavy at times in the morning. Significant snow accumulations possible. Blustery. Highs in the mid 30s. East winds 15 to 25 mph with gusts up to 30 mph. Chance of precipitation 100 percent.

Partly cloudy. Lows in the mid 20s. East winds 10 to 15 mph.

Mostly sunny. Highs in the lower 40s.

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 20s.

Mostly cloudy. A 30 percent chance of rain in the afternoon. Highs in the upper 40s.

Rain. Lows in the lower 40s. Chance of precipitation 90 percent.

Rain. Highs in the upper 50s. Chance of precipitation 90 percent.

Cloudy. Rain likely in the evening, then a chance of rain after midnight. Lows in the lower 40s. Chance of precipitation 60 percent.

Mostly cloudy. Highs in the mid 50s.

Partly cloudy. Lows in the mid 30s. Highs in the mid 50s.

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 28-APR 1 MAR 30-APR 5    MAR       MAR-MAY                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below      Below     Normal                      
 Precipitation:      Above       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

Thursday March 22, 2018 the 81th Day of Year

Declination 1.020000
Distance 0.999721 AU
Rise 06:58 EDT Set 19:14 EDT
Transit Meridian 13:05 EDT
Civil Twilight Begins 06:32 EDT Ends 19:40 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 spectactular display of the Northern Lights was visible as far south as
Bradenton FL, El Paso TX, and Fresno CA. At Detroit MI, the display was
described "so brilliant as to blot out all stars below first magnitude".
(22nd-23rd) (The Weather Channel)
A great flood crested on rivers from Ohio to Maine. The flood claimed 107
lives and caused 270 million dollars property damage. (David Ludlum)
Six to ten inch rains caused the Chicago River to overflow its banks. (The
Weather Channel)

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