Click on button above to view IL Watches/Warnings/Special Wx Statements.


Lasalle County, IL Weather and Climate Synopsis

To access other UK Agricultural Weather Center Pages use the pull-down menu below.

(Click image to zoom) or Click Here

36 Hr. Forecast Map
All Radar images NOAA/UKAWC
Satellite images from NOAA

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
Also see:




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
1126 AM CDT Wed Aug 15 2018

Cloudy skies were seen across central and southeast Illinois,
through the late morning hours. Showers and isolated thunderstorms
were reported across many locations across the area, as well. 
Temperatures across the area at 11 a.m., ranged from 71 degrees 
at Danville, to 81 degrees at Lawrenceville. 

As low pressure continues to progress into the region today and 
through the end of the week, low and mid level clouds will be seen.
Showers and isolated thunderstorms will also be possible across a
large portion of the region today and linger through Friday. 

High temperatures today, will range from near 80 across Wisconsin,
to near 90 degrees across the Missouri bootheel.

Overnight low temperatures, will range from the middle 50s across
northern Wisconsin, to the middle 70s across the Missouri
bootheel.

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 LASALLE County
Issued at 1100 AM CDT WED AUG 15 2018

NORTHEAST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  PTSUNNY   80  68  66 SE6       29.95S HX  83           
CHICAGO-MIDWAY CLOUDY    82  68  62 SE9       29.95S HX  85           
AURORA         PTSUNNY   80  71  74 SE7       29.96R HX  84           
LANSING*       FAIR      79  68  69 SE7       29.97R HX  81           
JOLIET*        PTSUNNY   83  71  68 SE9       29.96S HX  87           
WAUKEGAN       FAIR      81  71  71 VRB6      29.95S HX  85           
DUPAGE AIRPORT FAIR      79  71  76 S8        29.95S HX  82           
KANKAKEE*      PTSUNNY   80  69  69 S6        29.97S HX  83           
WHEELING       FAIR      83  67  58 S9        29.96S HX  85           
MORRIS*        PTSUNNY   81  71  73 S8        29.95S HX  85           
ROMEOVILLE*    PTSUNNY   80  70  70 S9        29.96S HX  83           
NORTHERLY ISL    N/A     79  69  71 E3          N/A  HX  81           

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 1100am CDT, Wednesday August 15, 2018

Across Illinois...temperatures are near 79 degrees north, near 73 degrees central, and near 71 degrees south. Current sky conditions are partly sunny north, cloudy central, and light rain south. In the north, relative humidity is near 74%, and the dew point is near 70 degrees. The heat index is near 82 degrees north. In the central part of the state, relative humidity is near 96%, and the dew point is near 72 degrees. In the south, relative humidity is near 96%, and the dew point is near 70 degrees. The livestock heat stress category is no stress north, no stress central, and no stress south. Winds are calm north, where conditions are favorable for spraying. Winds are from the south at 9 mph central, where conditions are favorable for spraying. Winds are from the south at 10 mph with gusts at 17 mph south, where conditions are not favorable for spraying due to strong winds and light rain. Based on current available observations, the highest temperature is 100/ degrees at Northerly Island. The lowest temperature is 70 degrees at Marion and Effingham.


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 LASALLE County,IL

1030 AM CDT Wed Aug 15 2018 /1130 AM EDT Wed Aug 15 2018/

 DAY ONE  Today and Tonight.

Weather hazards expected  

  Limited Thunderstorm Risk.
  Limited Flooding Risk.

DISCUSSION  

Scattered showers and thunderstorms are likely this afternoon
into mid-evening. Some of these will have heavy downpours. 
While rainfall amounts will not be uniform across the area, 
the slow movement of the system and slow individual shower and 
thunderstorm movement may produce quick local rainfall amounts 
of one to two inches, with isolated higher amounts possible. 
Showers and storms will decrease in coverage later this evening.

 DAYS TWO THROUGH SEVEN  Thursday through Tuesday.

Thursday and Friday  
  Limited Thunderstorm Risk.
Sunday  
  Limited Thunderstorm Risk.
Monday  
  Elevated Thunderstorm Risk.
Tuesday  
  Limited Thunderstorm Risk.

 SPOTTER INFORMATION STATEMENT  

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 10 to 15 mph.

NWS Severe Weather Map , Convective Outlook


7-Day Forecast For LASALLE County, IL
928 AM CDT Wed Aug 15 2018

REST OF TODAY
Cloudy. Scattered showers and a slight chance of thunderstorms in the morning, then periods of showers and a chance of thunderstorms in the afternoon. Highs in the upper 70s. Southeast winds 5 to 10 mph. Chance of precipitation 30 percent.

TONIGHT
Cloudy. Chance of showers and a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the upper 60s. Southeast winds 5 to 10 mph in the evening shifting to the north after midnight. Chance of precipitation 30 percent.

THURSDAY
Mostly cloudy with a 40 percent chance of showers and thunderstorms. Highs in the lower 80s. Northwest winds 5 to 10 mph.

THURSDAY NIGHT
Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the mid 60s. Northwest winds 5 to 10 mph.

FRIDAY
Mostly cloudy. Slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. North winds around 5 mph. Chance of precipitation 40 percent.

FRIDAY NIGHT
Partly cloudy with a 20 percent chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 60s.

SATURDAY
Mostly sunny. Highs in the lower 80s.

SATURDAY NIGHT
Mostly clear. Lows in the lower 60s.

SUNDAY
Mostly sunny. Highs in the mid 80s.

SUNDAY NIGHT
Partly cloudy. Lows in the mid 60s.

MONDAY
Mostly cloudy with a 50 percent chance of showers and thunderstorms. Highs in the upper 70s.

MONDAY NIGHT
Mostly cloudy. Showers and thunderstorms likely in the evening. Lows in the lower 60s. Chance of precipitation 60 percent.

TUESDAY
Partly cloudy. Highs in the upper 70s.

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 
                   AUG 20-24    AUG 22-28    AUG       AUG-OCT                      
                 -----------  -----------  --------  ---------
   Temperature:      Below        Below      Above      Above                      
 Precipitation:      Above        Above     Normal      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 August 15, 2018 the 227th Day of Year

---------------------------------------------------
SUN
Declination 13.740000
Distance 0.999717 AU
Rise 07:11 EDT Set 20:55 EDT
Transit Meridian 14:03 EDT
Civil Twilight Begins 06:44 EDT Ends 21:22 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

///////////////////////////
AUGUST 15TH...HISTORIC WEATHER EVENTS
...1787...
Tornadoes were reported in Connecticut, Rhode Island, Massachusetts, and
New Hampshire. Wethersfield CT was hard hit by the tornado outbreak. (David
Ludlum)
...1946...
Saint Louis MO was deluged with a record 8.78 inches of rain in 24 hours.
(The Weather Channel)
...1967...
The "sundance fire" in northern Idaho was started by lightning. Winds of 50
mph carried firebrands as much as ten miles in advance to ignite new fires,
and as a result, the forest fire spread twenty miles across the Selkirk
Mountains in just twelve hours, burning 56,000 acres. The heat of the fire
produced whirlwinds of flame with winds up to 300 mph which flung giant
trees about like matchsticks. (David Ludlum)
...1987...
Thunderstorms developing ahead of a sharp cold front produced severe
weather in the Upper Midwest during the afternoon and evening hours, with
Minnesota and eastern South Dakota hardest hit. A thunderstorm in west
central Minnesota spawned a tornado at Eagle Lake which killed one person
and injured eight others. A thunder- storm in eastern South Dakota produced
softball size hail at Warner. (The National Weather Summary) (Storm Data)
...1988...
Thirty five cities in twenty states in the north central and northeastern
U.S. reported record high temperatures for the date, including Lamoni IA
and Baltimore MD, where the mercury hit 105 degrees. Temperatures 100
degrees or above were reported in twenty-two states. Pierre SD was the hot
spot in the nation with a high of 114 degrees. Bluefield WV reported eight
straight days of record heat. (The National Weather Summary)
...1989...
Evening thunderstorms in eastern New Mexico produced wind gusts to 66 mph
at Clovis. Evening thunderstorms in West Texas produced baseball size hail
around Hereford, Dimmitt, Ware and Dalhart. (The National Weather Summary)
(Storm Data)


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