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Mason County, IL Weather and Climate Synopsis

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36 Hr. Forecast Map
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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
705 PM CST Tue Dec 18 2018

A high pressure ridge stretching along the Ohio Valley, brought
sunny skies and seasonably mild temperatures to central and
southeast Illinois on Tuesday. Highs reached the middle to upper 

The area of high pressure, will continue providing pleasant 
weather across the region on Wednesday. Chances for light rain 
arrive later Wednesday night and will linger until early Friday 
morning, as a cold front crosses the Midwest. It is possible that 
some areas will see a brief changeover to light snow overnight 
Thursday into Friday morning. However, little to no accumulation 
is expected.

Low temperatures tonight will range from the lower 30s in central
Iowa, to the mid 40s along the Ohio Valley. Highs on Wednesday
will range from near 40 degrees in northern Illinois, to near 50
degrees 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 MASON County
Issued at 1200 AM CST WED DEC 19 2018

PONTIAC        FAIR      32  31  95 S7        30.01F WCI  26          
BLOOMINGTON    FAIR      32  28  85 S16       30.00F WCI  21          
DECATUR        FAIR     N/A N/A N/A S10       30.03F                  
PEORIA         FAIR      33  28  81 S9        29.99F WCI  25          
6HR MIN TEMP:  32; 6HR MAX TEMP:  39;                                

LACON*         FAIR      34  26  75 S6        29.98F WCI  28          
LINCOLN*       FAIR      36  30  80 S8        30.01F WCI  29          
SPRINGFIELD    FAIR      37  30  75 S14       30.01F WCI  28          
6HR MIN TEMP:  34; 6HR MAX TEMP:  38;                                

TAYLORVILLE    FAIR      35  29  79 SE9       30.03F WCI  27          
6HR MIN TEMP:  33; 6HR MAX TEMP:  38;                                

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 1200am CST, Wednesday December 19, 2018

Across Illinois...temperatures are near 32 degrees north, near N/A degrees central, and near 28 degrees south. Current sky conditions are fair north, fair central, and fair south. In the north, relative humidity is near 85%, and the dew point is near 28 degrees. In the central part of the state, relative humidity is near N/A%, and the dew point is near N/A degrees. In the south, relative humidity is near 100%, and the dew point is near 28 degrees. Winds are from the south at 9 mph north, where conditions are favorable for spraying. The wind chill is near 24 degrees north. Winds are from the south at 10 mph central, where conditions are favorable for spraying. Winds are calm 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 210/ degrees at Northerly Island. The lowest temperature is 27 degrees at Robinson.

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 MASON County,IL

405 PM CST Tue Dec 18 2018


No hazardous weather is expected at this time.


No hazardous weather is expected at this time. 


Spotter activation will not be required.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For MASON County, IL
333 PM CST Tue Dec 18 2018

Mostly clear in the evening then becoming mostly cloudy. Lows in the lower 30s. South winds 5 to 10 mph.

Mostly cloudy. Highs around 50. South winds 10 to 15 mph.

Cloudy with a 30 percent chance of rain. Lows around 40. Southwest winds 5 to 10 mph.

Cloudy with a 50 percent chance of rain. Highs in the mid 40s. Northwest winds 5 to 15 mph. Gusts up to 25 mph in the afternoon.

Mostly cloudy. Lows in the upper 20s. North winds 10 to 15 mph with gusts to around 25 mph.

Partly cloudy. Highs in the upper 30s. Lows in the mid 20s.

Partly sunny. Highs in the lower 40s.

Partly cloudy. Lows in the upper 20s. Highs around 40.

Partly sunny. Highs in the lower 40s.

Mostly cloudy with a 30 percent chance of snow. Lows in the lower 30s.

Partly sunny with a 30 percent chance of rain and snow. Highs in the mid 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
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   DEC 24-28 DEC 26-JAN 1    DEC   DEC18-FEB19                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above     Normal      Above                      
 Precipitation:      Above        Above      Below      Below                      

....  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 December 19, 2018 the 353th Day of Year

Declination -23.420000
Distance 0.999725 AU
Rise 08:16 EST Set 17:37 EST
Transit Meridian 12:56 EST
Civil Twilight Begins 07:46 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

The Continental Army moved into encampment at Valley Forge amidst stormy
winds and piercing cold. A relatively moderate winter followed. (David
Temperatures rose to record warm readings of 67 at Louisville and 68 at 
Lexington. (NWS Louisville)
The Riverside Ranger Station in Yellowstone Park WY reported a low of 59
degrees below zero, a December record for the U.S. (David Ludlum) (The
Weather Channel)
A tornado, 200 yards in width, killed two persons along its 15-mile path
from near Waldo to near Bueana Vista in southwestern Arkansas. People from
one house were carried 250 yards, and cars were said to have been carried
600 yards. (The Weather Channel)
A record 83 inches of snow covered the ground at Flagstaff AZ. The heavy
snows inflicted great hardships on reservations. (David Ludlum)
Thunderstorms produced large hail and damaging winds in eastern Texas and
the Lower Mississippi Valley. Thunderstorms produced wind gusts to 90 mph
at Venus TX and Providence LA. Rain prevailed from the Southern Plains to
the Middle Mississippi Valley. Small stream flooding was reported around
Columbia MO. (The National Weather Summary) (Storm Data)
Low pressure and a trailing cold front in the central U.S. brought snow and
high winds to parts of the Rocky Mountain Region. Winds in Colorado gusted
to 67 mph at La Junta. Thunderstorms along the same cold front produced
wind gusts to 65 mph at Kansas City MO. (The National Weather Summary)
(Storm Data)
High winds and heavy snow plagued the northern and central Rockies.
Snowfall totals in Montana ranged up to 12 inches at Lincoln, and wind
gusts in Colorado reached 97 mph at Squaw Mountain. Twelve cities in the
north central U.S. reported record low temperatures for the date, including
Dickinson ND with a reading of 26 degrees below zero. Bismarck ND was the
cold spot in the nation with a morning low of 35 degrees below zero. (The
National Weather Summary) (Storm Data)
The World record high sea level pressure of 32.03" of Hg was set in Tosontsengel, 
Mongolia. (NWS)

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