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St Clair 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
834 PM CDT Wed Oct 18 2017

Clear skies and light south winds were seen across central and 
southeast Illinois this evening. Temperatures around the area at 8
PM, ranged from 51 degrees at Paris, to 64 degrees at 
Springfield.

Southerly flow will dominate the Midwest for the next several
days. This will produce temperatures much above normal, through 
the end of the work week. Dry weather is expected through Friday.
A storm system moves in Saturday, spreading rain across the region
into Sunday.

Low temperatures overnight, will drop into the mid 40s to lower 
50s across the Midwest, while highs on Thursday, will reach the
70s.

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 ST CLAIR County
Issued at 400 AM CDT THU OCT 19 2017

SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          CLEAR     52  49  88 CALM      30.13F                  
BELLEVILLE     CLEAR     49  45  87 S5        30.17S                  
CAHOKIA*       CLEAR     52  47  83 S3        30.14S                  
SPARTA*        CLEAR     55  47  74 S6        30.17F                  

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 CDT, Thursday October 19, 2017

Across Illinois...temperatures are near 52 degrees north, near 54 degrees central, and near 45 degrees south. Current sky conditions are partly cloudy north, clear central, and clear south. In the north, relative humidity is near 74%, and the dew point is near 44 degrees. In the central part of the state, relative humidity is near 80%, and the dew point is near 48 degrees. In the south, relative humidity is near 100%, and the dew point is near 45 degrees. There is patchy fog south. Winds are from the west at 5 mph north, where conditions are favorable for spraying. Winds are from the southwest at 10 mph central, where conditions are favorable for spraying. Winds are calm south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 58 degrees at Northerly Island. The lowest temperature is 44 degrees at Rochelle.


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 ST CLAIR County,IL

351 PM CDT Wed Oct 18 2017

 DAY ONE  Tonight

No hazardous weather is expected at this time.

 DAYS TWO THROUGH SEVEN  Thursday through Tuesday

No hazardous weather is expected at this time.

 SPOTTER INFORMATION STATEMENT  

Spotter activation is not anticipated through tonight.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For ST CLAIR County, IL
336 AM CDT Thu Oct 19 2017

THROUGH SUNRISE
Clear. Temperature falling to around 50. Light wind.

TODAY
Sunny. High around 80. Light wind.

TONIGHT
Clear. Low in the upper 40s to mid 50s. Light wind.

FRIDAY
Mostly sunny. High around 80. Light wind in the morning becoming south around 10 mph in the afternoon.

FRIDAY NIGHT
Partly cloudy. Low in the mid 50s. Southeast wind around 10 mph in the evening becoming light after midnight.

SATURDAY
Mostly cloudy early in the morning then becoming partly sunny. High around 80. South wind 10 to 15 mph with gusts to around 25 mph.

SATURDAY NIGHT
Partly cloudy in the evening, then cloudy with showers with thunderstorms likely after midnight. Low around 60. Chance of rain 80 percent.

SUNDAY
Cooler. Showers and chance of thunderstorms in the morning, then showers likely in the afternoon. High in the upper 60s. Temperature steady or slowly falling in the afternoon. Chance of rain 90 percent.

SUNDAY NIGHT
Cooler. Partly cloudy with a 30 percent chance of showers. Low around 50.

MONDAY
Partly cloudy with a 20 percent chance of showers. High in the upper 60s.

MONDAY NIGHT AND TUESDAY
Mostly clear. Low around 50. High in the mid 60s.

TUESDAY NIGHT AND WEDNESDAY
Partly cloudy. Low in the mid 40s. High in the upper 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
                             ILLINOIS                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   OCT 24-28 OCT 26-NOV 1    OCT       OCT-DEC                      
                 -----------  -----------  --------  ---------
   Temperature:      Below       Normal     Normal      Above                      
 Precipitation:      Below        Below      Below     Normal                      

....  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 October 19, 2017 the 292th Day of Year

---------------------------------------------------
SUN
Declination -10.410000
Distance 0.999721 AU
Rise 08:14 EDT Set 19:13 EDT
Transit Meridian 13:43 EDT
Civil Twilight Begins 07:48 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

///////////////////////////
OCTOBER 19TH
HISTORIC WEATHER EVENTS
...1844...
The famous "Lower Great Lakes Storm" occurred. Southwesterly winds were at
hurricane force for five hours, driving lake waters into downtown Buffalo
NY. The storm drowned 200 persons. (David Ludlum)
...1961...
Rain changed to a record early season, heavy wet snow over the southern
mountains of West Virginia. Leaves were still on trees, resulting in the
worst forest disaster since the fires of 1952 and 953. One to two feet of
snow fell near Summersville and Richwood. (19th-20th) (The Weather Channel)
...1984...
Thunderstorms deluged the town of Odem TX (located 15 miles northwest of
Corpus Christi) with 25 inches of rain in just three and a half hours. Most
businesses in Odem were flooded, as were 1000 homes in nearby Sinton. (The
Weather Channel)
...1987...
A cold front brought rainshowers to parts of the central U.S., and ushered
cool Canadian air into the Great Plains Region. Daytime highs were only in
the 30s in North Dakota and eastern Montana. (The National Weather Summary)
...1988...
Thunderstorms produced high winds in eastern Colorado, with gusts to 63 mph
reported at La Junta. (Storm Data) (The National Weather Summary)
...1989...
Record breaking snows fell across northern and central Indiana. Totals
ranged up to 10.5 inches at Kokomo, and 9.3 inches was reported at
Indianapolis. The 8.8 inch total at South Bend was a record for the month
as a whole. Up to seven inches of snow fell in extreme southern Lower
Michigan, and up to six inches fell in southwestern Ohio. The heavy wet
snow downed many trees and power lines. Half the city of Cincinnati OH was
without electricity during the morning hours. Temperatures dipped below
freezing across much of the Great Plains Region. Twenty cities, including
fourteen in Texas, reported record low temperatures for the date. North
Platte NE reported a record low of 11 degrees. In Florida, four cities
reported record high temperatures for the date. The record high of 92
degrees at Miami also marked a record fourteen days of 90 degree weather in
October, and 116 such days for the year. (The National Weather Summary)


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