Harrisburg, Illinois Weather Conditions
Severe Weather Alerts
Next 12 Hours
5 Day Forecast
- Monday
-
- High: 77 °
- Low: 54 °
- Chance of T-Storms
- Tuesday
-
- High: 81 °
- Low: 52 °
- Clear
- Wednesday
-
- High: 84 °
- Low: 63 °
- Clear
- Thursday
-
- High: 88 °
- Low: 73 °
- Clear
- Friday
-
- 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%.

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

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

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

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

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

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

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

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

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

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

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

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

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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%.

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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%.

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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%.

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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%.

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

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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%.

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

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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%.

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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!]
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Location: APRSWXNET Harrisburg IL US, Raleigh, IL Updated: 11:58 AM CDT |
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| 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 |
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Location: RAWS DIXON SPRINGS IL US, Simpson, IL Updated: 11:08 AM CDT |
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| 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 |
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Location: WB0VTM - HAM RADIO, Marion, IL Updated: 12:03 PM CDT |
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| 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 |
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MSN Maps of: |
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| 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


