Harrisburg, Illinois Weather Conditions

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Current Conditions

  • 73°
  • Scattered Clouds
  • Wind: NNW 10 mph
  • Humidity: 65%
  • Visibility: 10.0 miles
  • Dew Point: 61°
  • Pressure: 30.09 in. -

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Next 12 Hours

1  pm
4  pm
7  pm
10  pm
1  am
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Clear
Clear
75°
77°
72°
61°
57°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 54 °
  • Chance of T-Storms
  • Tuesday
  • Clear
  • High: 81 °
  • Low: 52 °
  • Clear
  • Wednesday
  • Clear
  • High: 84 °
  • Low: 63 °
  • Clear
  • Thursday
  • Clear
  • High: 88 °
  • Low: 73 °
  • Clear
  • Friday
  • Clear
  • High: 93 °
  • Low: 70 °
  • Clear

Forecast for Harrisburg, Illinois

Updated: 10:00 AM CDT on May 21, 2012

  • Monday

    Overcast with a chance of a thunderstorm and a chance of rain in the morning, then mostly cloudy. High of 77F. Winds from the NW at 10 to 15 mph. Chance of rain 20%.

  • Monday Night

    Partly cloudy in the evening, then clear. Low of 54F. Winds from the NW at 5 to 10 mph.

  • Tuesday

    Clear. High of 81F. Winds from the North at 10 to 15 mph.

  • Tuesday Night

    Clear. Low of 52F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 84F. Winds from the SSE at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 63F. Winds from the SSE at 5 to 10 mph.

  • Thursday

    Clear. High of 88F. Winds from the South at 10 to 15 mph.

  • Thursday Night

    Partly cloudy in the evening, then clear. Low of 73F. Winds from the SSW at 5 to 15 mph.

  • Friday

    Clear. High of 93F. Winds from the SSW at 10 to 15 mph.

  • Friday Night

    Partly cloudy. Low of 70F. Winds from the SW at 5 to 10 mph.

  • Saturday

    Clear. High of 90F. Winds less than 5 mph.

  • Saturday Night

    Partly cloudy. Low of 73F. Winds from the ESE at 5 to 10 mph.

  • Sunday

    Clear. High of 95F. Winds from the ESE at 5 to 10 mph.

  • Sunday Night

    Partly cloudy with a chance of a thunderstorm. Low of 73F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.

  • Monday

    Partly cloudy with a chance of a thunderstorm. High of 95F with a heat index of 104F. Winds from the South at 5 to 15 mph. Chance of rain 50%.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm. Low of 73F. Winds from the South at 5 to 10 mph. Chance of rain 40%.

  • Tuesday

    Partly cloudy with a chance of a thunderstorm. High of 99F. Winds from the WSW at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm. Low of 72F. Winds less than 5 mph. Chance of rain 40%.

  • Wednesday

    Partly cloudy with a chance of a thunderstorm. High of 91F with a heat index of 126F. Winds less than 5 mph. Chance of rain 40%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm. Low of 68F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday

    Partly cloudy with a chance of a thunderstorm. High of 91F with a heat index of 122F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Clear. Low of 68F. Winds less than 5 mph. Chance of rain 30%.

Severe Weather Alert Descriptions

 Local Storm Report 



05/20/2012 0655 PM

Muddy, Saline County.

Thunderstorm wind damage, reported by law enforcement.


            Trees down, some on houses and power lines. Traffic
            stopped. Damage from wind and hail.





05/20/2012 0645 PM

Harrisburg, Saline County.

Thunderstorm wind damage, reported by 911 call center.


            Trees and power lines down.





05/20/2012 0636 PM

Harrisburg, Saline County.

Hail e1.00 inch, reported by trained spotter.


            Quarter hail in Harrisburg. Increased in size from pea
            size about 10 min ago.




Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: APRSWXNET Harrisburg IL US, Raleigh, IL

Updated: 11:58 AM CDT

Temperature: 73 °F Dew Point: 65 °F Humidity: 75% Wind: NNW at 3 mph Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: RAWS DIXON SPRINGS IL US, Simpson, IL

Updated: 11:08 AM CDT

Temperature: 74 °F Dew Point: 62 °F Humidity: 66% Wind: NNW at 6 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: WB0VTM - HAM RADIO, Marion, IL

Updated: 12:03 PM CDT

Temperature: 73.4 °F Dew Point: 58 °F Humidity: 59% Wind: West at 3.1 mph Pressure: 30.04 in Hourly Precipitation: - Heat Index: 77 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Paducah Kentucky 
620 am CDT Monday may 21 2012 


Update... 
issued at 620 am CDT Monday may 21 2012 


Update to the aviation section. 


&& 


Short term...(today through tuesday) 
issued at 256 am CDT Monday may 21 2012 


Difficult to determine exactly where the cold front is due to 
convective outflows from previous convection but more than likely 
runs from mvn to pof. Things are essentially dry across the County Warning Area right 
now...but with plenty of moisture still around will keep 
isolated/scattered wording until the drier air moves in. Have seen 
isolated convection behind the boundary so followed the deep layer 
1000-500 relative humidity averages from the models to determine the ending of 
precipitation. 


By tonight high pressure should be well in control. Very dry air 
behind this front with dew points in the 30s and 40s in the 
Central Plains. With this in mind...plus forecast soundings...have 
lowered dew points through the period starting tonight. Afternoon 
relative humidity values will be in the 30 percent range (at least) Tuesday and 
Wednesday so what little rain most of US got yesterday will 
quickly evaporate out of the soil. 


Long term...(thursday through sunday) 
issued at 256 am CDT Monday may 21 2012 


Models maintain building an upper level high over the region through 
the period...which will result in dry and unseasonably warm weather. 
The GFS hints at isolated convection by Sunday into Monday whereas 
the European model (ecmwf) holds out a little longer. These conditions will only 
serve to maintain or increase short term drought conditions across 
the area. We went lower than guidance on afternoon dew points given 
model sounding depictions. 


&& 


Aviation...(for the 12z tafs through 12z Tuesday morning) 
issued at 620 am CDT Monday may 21 2012 


Spotty MVFR visibilities should jump back to p6sm once north-northwest winds kick up 
this morning behind a cold front that will move across the region. 
Middle and high clouds will persist for a good part of the morning 
and early afternoon...with scattered VFR clouds below. Not enough of a 
chance of precipitation to include in the tafs at this time. Winds 
will let up tonight. 


&& 


Pah watches/warnings/advisories... 
Illinois...none. 
MO...none. 
In...none. 
Kentucky...none. 
&& 


$$ 


Short term...plus 
long term....cn 
aviation...cn 












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