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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 CDT Tue Mar 20 2018

Partly to mostly cloudy skies, and cool temperatures prevailed
over central and southeast Illinois on Tuesday. Light snow
affected far eastern Illinois, by the early evening hours. High
temperatures were several degrees below normal, only reaching the
lower 40s, on the first day of astronomical spring.

A storm system strengthening over the eastern U.S., will spread
accumulating snow as far west Indiana and Kentucky, for tonight
and into early Wednesday. Farther west, high pressure will bring 
cool and dry weather to much of the Midwest. A fast moving upper 
level disturbance, will bring a chance for rain showers to much of
the area, on Thursday.

Low temperatures tonight will drop into the mid 20s to mid 30s
across the Midwest. Highs on Wednesday will range from the upper
30s in northwest Indiana, to the lower 50s 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 MASON County
Issued at 300 AM CDT WED MAR 21 2018

PONTIAC        MOCLDY    29  25  83 N12       29.94S WCI  20          
BLOOMINGTON    CLOUDY    28  22  78 N15       29.93S WCI  16          
DECATUR        CLOUDY    30  21  69 N15       29.92S WCI  19          
PEORIA         CLOUDY    31  20  63 N9        29.97R WCI  23          
LACON*         FAIR      29  20  69 N8        29.97R WCI  21          
LINCOLN*       CLOUDY    32  23  70 N9        29.95S WCI  24          
SPRINGFIELD    CLOUDY    33  22  63 N7        29.96R WCI  27          
TAYLORVILLE    CLOUDY    32  24  72 N14       29.94S WCI  22          

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 300am CDT, Wednesday March 21, 2018

Across Illinois...temperatures are near 25 degrees north, near 30 degrees central, and near 34 degrees south. Current sky conditions are mostly cloudy north, cloudy 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 69%, and the dew point is near 21 degrees. In the south, relative humidity is near 75%, and the dew point is near 27 degrees. Winds are from the north at 10 mph north, where conditions are favorable for spraying. The wind chill is near 15 degrees north. Winds are from the north at 15 mph central, where conditions are not favorable for spraying due to strong winds. The wind chill is near 19 degrees central. Winds are calm south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 36 degrees at Metropolis. The lowest temperature is 25 degrees at Rockford and Freeport.

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

306 PM CDT Tue Mar 20 2018


Minor flooding will persist along the Illinois River from Havana 
to Beardstown into the weekend. Otherwise, no hazardous weather 
is expected at this time. 


No hazardous weather is expected at this time.


Spotter activation is not anticipated through tonight.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For MASON County, IL
339 AM CDT Wed Mar 21 2018

Mostly cloudy early in the morning then clearing. Highs in the mid 40s. North winds 5 to 10 mph.

Mostly clear. Lows in the upper 20s. Northwest winds up to 5 mph.

Sunny in the morning, then mostly cloudy with a 20 percent chance of rain in the afternoon. Highs in the lower 50s. Southwest winds up to 5 mph.

Mostly cloudy. Lows in the mid 30s. South winds up to 5 mph shifting to the east after midnight.

Mostly cloudy. A 50 percent chance of rain in the afternoon. Highs in the lower 50s. East winds 5 to 15 mph.

Rain. Lows in the upper 30s. Highs in the lower 40s. Chance of rain 90 percent.

Mostly cloudy with a 40 percent chance of rain. Lows in the upper 20s.

Mostly sunny. Highs in the upper 40s.

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

Rain likely. Lows in the lower 40s. Highs in the upper 50s. Chance of rain 70 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