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McHenry 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



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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
858 PM CDT Wed Jul 31 2019

Cirrus clouds moved across western Illinois this evening, as a
band of rainfall slid through eastern Missouri. Temperatures late
evening were beginning to fall into the 60s.

The dry and seasonable weather pattern will continue through the
remainder of this week and into the weekend. As High pressure
slides toward the East Coast this weekend, temperatures will climb
back into the upper 80s to near 90 by Sunday.

Lows tonight will drop into the mid 50s to mid 60s. Highs Thursday
will peak in the upper 70s across northeast Indiana, increasing
southwest to the mid 80s in 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 MCHENRY County
Issued at 600 PM CDT WED APR 24 2024

NORTHEAST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  MOSUNNY   44  17  33 NE13      30.28R TC   7           
CHICAGO-MIDWAY MOSUNNY   44  25  47 NE12      30.29R TC   7           
AURORA         SUNNY     52  30  43 E8        30.25R TC  11           
JOLIET*        SUNNY     50  29  43 NE6       30.28R TC  10           
WAUKEGAN       SUNNY     42  22  44 NE12      30.28S TC   6           
DUPAGE AIRPORT SUNNY     47  30  51 NE10      30.26R TC   8           
KANKAKEE*      SUNNY     45  31  58 NE9       30.29R TC   7           
WHEELING       SUNNY     43  16  33 NE12G18   30.30R TC   6           
MORRIS*        SUNNY     51  28  40 E9        30.26R TC  11           
ROMEOVILLE*    SUNNY     46  25  42 NE8       30.29R TC   8           
LANSING*       SUNNY     40  32  73 NE9G17    30.29S TC   4           
NORTHERLY ISL*   N/A     40  30  68 NE9         N/A  TC   4

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 600pm CDT, Wednesday April 24, 2024

Across Illinois...temperatures are near 56 degrees north, near 53 degrees central, and near 60 degrees south. Current sky conditions are sunny north, mostly sunny central, and sunny south. In the north, relative humidity is near 32%, and the dew point is near 27 degrees. In the central part of the state, relative humidity is near 66%, and the dew point is near 42 degrees. In the south, relative humidity is near 57%, and the dew point is near 45 degrees. Winds are calm north, where conditions are favorable for spraying. Winds are from the northeast at 8 mph central, where conditions are favorable for spraying. Winds are variable at 6 mph south, where conditions are favorable for spraying. Based on current available observations, the highest temperature is 360/ degrees at Northerly Island. The lowest temperature is 40 degrees at Waukegan and Lansing.

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 MCHENRY County,IL 

255 PM CDT Wed Apr 24 2024 /355 PM EDT Wed Apr 24 2024/

 DAY ONE  Tonight.

Weather hazards expected  

  Significant Frost and freeze Risk.

DISCUSSION  

Areas of frost and sub-freezing temperatures are expected late
tonight into early Thursday morning outside Chicago.

 DAYS TWO THROUGH SEVEN  Thursday through Tuesday.

Friday afternoon and night  
  Limited Severe Thunderstorm Risk.
  Limited Flooding Risk.
Saturday  
  Limited Thunderstorm Risk.
Saturday night through Sunday night  
  Limited Severe Thunderstorm Risk.
  Limited Flooding Risk.

 SPOTTER INFORMATION STATEMENT  

  Spotter activation will not be necessary through tonight.

NWS Severe Weather Map , Convective Outlook

7-Day Forecast For MCHENRY County, IL
305 PM CDT Wed Apr 24 2024


FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT THURSDAY

TONIGHT
Clear in the evening, then becoming partly cloudy. Widespread frost. Cold. Lows in the upper 20s. East winds 5 to 10 mph.

THURSDAY
Widespread frost in the morning. Mostly sunny. Highs around 60. Southeast winds 5 to 10 mph.

THURSDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows around 40. Southeast winds 10 to 15 mph. Gusts up to 20 mph after midnight.

FRIDAY
Mostly cloudy. A chance of showers in the morning, then showers in the afternoon. Highs in the lower 60s. Southeast winds 10 to 20 mph with gusts up to 35 mph. Chance of precipitation 90 percent.

FRIDAY NIGHT
Periods of showers and thunderstorms. Breezy and not as cool with lows in the mid 50s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of precipitation near 100 percent.

SATURDAY
Mostly cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Breezy with highs in the mid 70s. Chance of precipitation 50 percent.

SATURDAY NIGHT
Showers and thunderstorms likely. Breezy with lows in the lower 60s. Chance of precipitation 70 percent.

SUNDAY
Showers and thunderstorms. Breezy with highs in the mid 70s. Chance of precipitation 80 percent.

SUNDAY NIGHT
Showers and thunderstorms likely. Lows around 60. Chance of precipitation 70 percent.

MONDAY
Mostly cloudy with a 50 percent chance of showers. Highs in the upper 60s.

MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 40s.

TUESDAY
Partly cloudy in the morning, then clearing. Highs in the upper 60s.

TUESDAY NIGHT
Mostly clear. Lows in the lower 50s.

WEDNESDAY
Mostly sunny in the morning, then becoming partly cloudy. Highs in the mid 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 
                APR 30-MAY 4  MAY 2-MAY 8    JUN       JUN-AUG                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above                                            
 Precipitation:     Normal       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 

Wednesday April 24, 2024 the 115th Day of Year

---------------------------------------------------
SUN
Declination 13.370000
Distance 0.999718 AU
Rise 07:07 EDT Set 20:48 EDT
Transit Meridian 13:56 EDT
Civil Twilight Begins 06:39 EDT Ends 21:15 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

APRIL 24TH
HISTORIC WEATHER EVENTS
...1899...
Two women and one son lived to tell the story of being picked up by a
tornado and carried more than a fourth of a mile, flying far above the
church steeples, before being gently set down again. The young boy and one
of the ladies said they had the pleasure of flying alongside a horse. The
horse "kicked and struggled" as it flew high above, and was set down
unharmed about a mile away. (The Weather Channel)
...1908...
Severe thunderstorms spawned eighteen tornadoes over across the Central
Gulf Coast States claiming the lives of 310 persons. The state of
Mississippi was hardest hit. A tornado near Hattiesburg MS killed 143
persons and caused more than half a million dollars damage. Four violent
tornadoes accounted for 279 of the 310 deaths. The deadliest of the four
tornadoes swelled to a width of 2.5 miles as it passed near Amite LA. The
tornado also leveled most of Purvis MS. (David Ludlum) (The Weather
Channel)
...1925...
Louisville's and Bowling Green's warmest April temperature: 91 and 96 
degrees, respectively. Also, Lexington's earliest 90 degree temperature (90 
degrees). (NWS Louisville)
...1980...
Three of eight helicopters were damaged in a sandstorm during a 
failed-attempt to rescue 52 American hostages held in Iran. The hostages 
were later released on January 20, 1981.
...2005...
The latest measurable snowfall on record occurred across parts of Kentucky 
last year. The snow was the result of cold air and moisture wrapping around 
an area of low pressure located over the northeast United States. 
Accumulating snow was mainly confined to the ridgetops and higher 
elevations of extreme east Kentucky but at least a few flakes were reported 
just about everywhere. Some amounts reported from across eastern and 
central Kentucky  include...0.6 inches in Booneville...1.0 inch at 
Jeremiah...1.2 inches at the Jackson Weather Office...1.5 inches at 
Cumberland...4.0 inches at Lynch...and 5.0 inches at Closplint. (NWS Jackson)

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