Chicago, IL

7:17 PM CDT on May 03, 2013 (GMT -0500)
Elev: 581 ft
Lon: 87.6° W
Lat: 41.9° N
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Active Advisory: Special Statement (US Severe Weather)
News
Winter Storm Achilles: 10 Amazing Facts
May 3, 2013
Records and amazing facts from this historic May snowstorm.
Tornado, Hail Hammer Northern Italy
May 3, 2013
Video, photos and weather imagery of a tornadic supercell in northern Italy Friday.
Why Is Our Solar System Such a Cosmic Weirdo?
May 3, 2013
The solar system that humans call home may be a strange oddity when compared with the incredible diversity of planetary systems researchers are discovering in the Milky Way, astronomers say.
Alaska Volcano's Earthquakes Explain Puzzling Eruption
May 3, 2013
Researchers track clues that led to a volcanic eruption in Alaska.
Solar-Powered Plane to Begin Historic Cross-Country Flight
May 3, 2013
It's almost time for a solar plane to embark on a historic coast-to-coast fliight.
Surprising! 10 Things You Don't Know About National Parks
May 2, 2013
Dive into the hidden secrets of our National Parks and National Historic Places.
10 Wettest Cities in America
May 2, 2013
The wettest cities in America stretch across a wide area geographically.
Wildfire Burns 15-Mile Path to the Ocean
May 3, 2013
High winds are helping push a massive wildfire that's cutting a clear path of destruction in Southern California.
Solar Plane to Make Stop in St. Louis
May 1, 2013
A solar-powered plane making its initial cross-country voyage sometime in May will be stopping in St. Louis.
Can Solar Panels Scorch Your Eyes?
May 1, 2013
According to Robert Phipps, a homeowner in England, his neighbors sunlight-harnessing, power-saving solar panels are so bright, theyre literally blinding.
Winter Storm Achilles (PHOTOS)
May 2, 2013
Here are photos and social media posts from residents who got a chilly, white greeting this first morning of May from Winter Storm Achilles.
Russia Charging NASA $70 Million Per Rocket Seat
May 1, 2013
Ticket prices for sending astronauts to space are rising again.
Eww! Early Earth Smelled Like Rotten Eggs
May 1, 2013
Microbial digestion lent earth Earth a nasty odor.
May Snowstorms: Are They Rare?
May 1, 2013
As we begin tracking the next snowstorm of the season we take a look at other May snowstorms, through the years.
Winter Storm Achilles: Historic May Snow
May 3, 2013
This record-breaking snowstorm will slowly wind down on Friday.
Spectacular Photos of Terrifying Storms
May 1, 2013
Photographer Mitch Dobrowner runs toward storms instead of away from them. He shares his spectacular black-and-white images of some major systems.
May's 10 Worst Tornado Outbreaks
May 1, 2013
May is typically the peak of tornado season. We count down America's 10 worst tornado outbreaks in this turbulent month.
Thousands Apply to Live On Mars - Forever
May 1, 2013
Thousands are already singing up for the Mars One Project.
Heavy Rains Swamp Florida
May 1, 2013
Slow-moving thunderstorms drenched parts of South Florida Tuesday.
Monster Hurricane on Saturn's North Pole
April 30, 2013
Hurricane watch on Saturn! NASA has captured stunning views of a monster storm on the planet.
More News Articles
Weather Summary
Kari Kiefer
Weather Underground midday recap for Friday, May 03, 2013.

A cold front stalled over the Mississippi River Valley on Friday, which brought more active weather to the region. Cooler temperatures along the back side of this system allowed for snow showers persist. But as warmer air moved in from the south, these snow showers turned to freezing rain and rain showers. Ahead of this frontal boundary, heavy rains with showers and thunderstorms developed from the Mid- to Lower Mississippi River Valley. This allowed for flooding concerns to return to the Midwest and most of the Mississippi River Valley and the Lower Ohio River Valley. Mid-day rainfall totals reached over 2 inches in some areas from northern Arkansas through Illinois. Severe thunderstorms with hail and damaging wind gusts have not yet developed with this system on Friday.

Meanwhile, to the southeast, an area of low pressure lingering over Florida continued kicking up heavy rainfall and strong thunderstorms, as abundant moisture from the Gulf of Mexico fed energy into the system. Rainfall totals in these areas reached over 3 inches in many areas. Severe storms have not yet developed in Florida.

Out West, high pressure over the West Coast maintained dangerous fire weather conditions for California and the Desert Southwest. Red Flag warnings have been issued in these areas due to low humidity with hot temperatures and gusty winds.
Weather Underground midday recap for Friday, May 03, 2013.

A cold front stalled over the Mississippi River Valley on Friday, which brought more active weather to the region. Cooler temperatures along the back side of this system allowed for snow showers persist. But as warmer air moved in from the south, these snow showers turned to freezing rain and rain showers. Ahead of this frontal boundary, heavy rains with showers and thunderstorms developed from the Mid- to Lower Mississippi River Valley. This allowed for flooding concerns to return to the Midwest and most of the Mississippi River Valley and the Lower Ohio River Valley. Mid-day rainfall totals reached over 2 inches in some areas from northern Arkansas through Illinois. Severe thunderstorms with hail and damaging wind gusts have not yet developed with this system on Friday.

Meanwhile, to the southeast, an area of low pressure lingering over Florida continued kicking up heavy rainfall and strong thunderstorms, as abundant moisture from the Gulf of Mexico fed energy into the system. Rainfall totals in these areas reached over 3 inches in many areas. Severe storms have not yet developed in Florida.

Out West, high pressure over the West Coast maintained dangerous fire weather conditions for California and the Desert Southwest. Red Flag warnings have been issued in these areas due to low humidity with hot temperatures and gusty winds.
More News Articles

Chicago Weather at a Glance

Updated 7:17 PM CDT
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Now
Overcast
Overcast
Temperature
44.4 °F
Feels Like 42 °F
Wind(mph)
5.0
Sunrise / Set
5:43 AM
7:51 PM
Moon
Waning Crescent
Tonight
Chance of Rain 43 °F
Chance of Rain
40% chance of precipitation
Tomorrow
Chance of Rain 63 °F
Chance of Rain
20% chance of precipitation
Tomorrow Night
Partly Cloudy 48 °F
Partly Cloudy
Sunday
Partly Cloudy 61 | 45 °F
Partly Cloudy
Monday
Mostly Cloudy 61 | 48 °F
Mostly Cloudy
Tuesday
Clear 61 | 50 °F
Clear
Tomorrow is forecast to be Warmer than today.

Forecast

View Calendar 10-Day Forecast for station KILCHICA86

Friday, 3
Chance of a Thunderstorm
59 | 43 °F
Chance of T-storms
Chance of
Precipitation
70%
Saturday, 4
Chance of Rain
63 | 48 °F
Chance of Rain
Chance of
Precipitation
20%
Sunday, 5
Partly Cloudy
61 | 45 °F
Partly Cloudy
Chance of
Precipitation
10%
Monday, 6
Mostly Cloudy
61 | 48 °F
Mostly Cloudy
Chance of
Precipitation
0%
Tuesday, 7
Clear
61 | 50 °F
Clear
Chance of
Precipitation
0%
Wednesday, 8
Mostly Cloudy
81 | 59 °F
Mostly Cloudy
Chance of
Precipitation
0%
Thursday, 9
Mostly Cloudy
66 | 55 °F
Mostly Cloudy
Chance of
Precipitation
0%
Friday, 10
Partly Cloudy
73 | 64 °F
Partly Cloudy
Chance of
Precipitation
0%
Saturday, 11
Chance of a Thunderstorm
73 | 50 °F
Chance of T-storms
Chance of
Precipitation
40%
Sunday, 12
Chance of a Thunderstorm
68 | 48 °F
Chance of T-storms
Chance of
Precipitation
50%
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Friday Night
nt_chancerain Overcast with a chance of rain. Low of 43F. Winds from the NNE at 5 to 15 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 41 | 38 53 | 38 53 | 41 45 | 43
Wind 14 mph North 12 mph NNE 10 mph NE 7 mph ENE
Humidity 89% 60% 67% 92%
Chance of Precip. 50% 70% 70% 50%
Cloud Cover 100% 100% 98% 93%
Conditions Rain Showers Rain Showers Chance of a Thunderstorm Chance of Rain
Sunrise & Sunset
5:43 AM
7:51 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.23], Average RMSE [1.54]
The National Weather Service forecast quality is good. MaxT RMSE [2.17], Average RMSE [2.20] : Use NWS
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Saturday
partlycloudy Partly cloudy with a chance of rain. High of 63F. Winds from the SE at 5 to 15 mph. Chance of rain 20%.
Saturday Night
nt_partlycloudy Partly cloudy. Low of 48F. Winds from the ENE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 52 | 46 59 | 47 59 | 45 52 | 45
Wind 7 mph West 10 mph East 10 mph West 5 mph ENE
Humidity 80% 65% 59% 74%
Chance of Precip. 40% 20% 20% 10%
Cloud Cover 80% 70% 68% 64%
Conditions Chance of Rain Chance of Rain Chance of Rain Mostly Cloudy
Sunrise & Sunset
5:42 AM
7:52 PM
The quality of the forecasted high temperature for this day is good. MaxT RMSE [2.21], Average RMSE [2.41]
The National Weather Service forecast quality is good. MaxT RMSE [2.17], Average RMSE [2.09] : Use NWS
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Sunday
partlycloudy Partly cloudy. High of 61F. Winds from the NE at 5 to 15 mph.
Sunday Night
nt_mostlycloudy Overcast. Low of 45F. Winds from the NE at 5 to 15 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 45 58 | 46 56 | 45 49 | 43
Wind 7 mph NE 10 mph NE 10 mph NNE 7 mph NE
Humidity 82% 63% 68% 80%
Chance of Precip. 10% 10% 10% 0%
Cloud Cover 59% 54% 53% 95%
Conditions Partly Cloudy Partly Cloudy Partly Cloudy Overcast
Sunrise & Sunset
5:41 AM
7:53 PM
The quality of the forecasted high temperature for this day is fair. MaxT RMSE [2.59], Average RMSE [3.81]
The National Weather Service forecast quality is fair. MaxT RMSE [2.79], Average RMSE [2.87] : Use NWS
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Monday
mostlycloudy Overcast. High of 61F. Winds from the NNE at 5 to 15 mph.
Monday Night
nt_partlycloudy Partly cloudy. Low of 48F. Winds from the NNE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 48 | 41 60 | 46 58 | 44 49 | 38
Wind 7 mph NE 9 mph NE 10 mph NNE 7 mph NE
Humidity 77% 58% 61% 61%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 96% 84% 89% 63%
Conditions Overcast Mostly Cloudy Overcast Partly Cloudy
Sunrise & Sunset
5:40 AM
7:54 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [3.58], Average RMSE [4.42]
The National Weather Service forecast quality is fair. MaxT RMSE [3.38], Average RMSE [3.45] : Use NWS
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Tuesday
clear Clear. High of 61F. Winds from the NNE at 5 to 10 mph.
Tuesday Night
nt_partlycloudy Partly cloudy. Low of 50F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 38 60 | 44 60 | 44 53 | 37
Wind 8 mph North 8 mph NNE 6 mph NNE 4 mph NE
Humidity 63% 57% 55% 54%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 0% 0% 7% 12%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
5:38 AM
7:55 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.32], Average RMSE [3.91]
The National Weather Service forecast quality is poor. MaxT RMSE [3.74], Average RMSE [3.21] : Use NWS
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Wednesday
mostlycloudy Mostly cloudy. High of 81F. Winds less than 5 mph.
Wednesday Night
nt_mostlycloudy Overcast. Low of 59F. Winds from the SSE at 5 to 10 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 40 66 | 46 71 | 47 63 | 45
Wind 2 mph NE 1 mph SE 5 mph ENE 5 mph SE
Humidity 50% 48% 43% 51%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 100% 79% 79% 96%
Conditions Overcast Mostly Cloudy Mostly Cloudy Overcast
Sunrise & Sunset
5:37 AM
7:56 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.50], Average RMSE [4.62]
The National Weather Service forecast quality is poor. MaxT RMSE [4.93], Average RMSE [4.40] : Use NWS
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Thursday
mostlycloudy Overcast. High of 66F. Winds less than 5 mph.
Thursday Night
nt_chancerain Overcast with a chance of rain. Low of 55F. Winds less than 5 mph. Chance of rain 50%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 60 | 46 64 | 51 65 | 52 63 | 50
Wind 4 mph SW 2 mph SSW 4 mph ESE 5 mph ESE
Humidity 59% 62% 61% 61%
Chance of Precip. 0% 0% 10% 20%
Cloud Cover 96% 96% 95% 99%
Conditions Overcast Overcast Overcast Chance of Rain
Sunrise & Sunset
5:36 AM
7:58 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.57], Average RMSE [4.53]
The National Weather Service forecast quality is poor. MaxT RMSE [4.87], Average RMSE [5.26] : Use NWS
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Friday
partlycloudy Partly cloudy. High of 73F. Winds from the East at 5 to 10 mph.
Friday Night
nt_partlycloudy Partly cloudy. Low of 64F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 58 | 49 62 | 53 71 | 53 66 | 54
Wind 4 mph SE 4 mph ESE 8 mph ENE 2 mph ESE
Humidity 73% 69% 52% 63%
Chance of Precip. 20% 10% 10% 0%
Cloud Cover 100% 26% 45% 52%
Conditions Chance of Rain Partly Cloudy Partly Cloudy Partly Cloudy
Sunrise & Sunset
5:35 AM
7:59 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [4.52], Average RMSE [5.52]
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Saturday
chancetstorms Partly cloudy with a chance of a thunderstorm. Fog early. High of 73F. Winds less than 5 mph. Chance of rain 40%.
Saturday Night
nt_chancetstorms Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 50F. Winds less than 5 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 64 | 55 62 | 57 64 | 60 53 | 53
Wind 2 mph SE 2 mph East 4 mph ENE 4 mph NE
Humidity 71% 87% 86% 100%
Chance of Precip. 0% 10% 10% 10%
Cloud Cover 55% 55% 51% 54%
Conditions Partly Cloudy Partly Cloudy Fog Fog
Sunrise & Sunset
5:34 AM
8:00 PM
The quality of the forecasted high temperature for this day is poor. MaxT RMSE [5.44], Average RMSE [4.99]
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Sunday
chancetstorms Mostly cloudy with a chance of a thunderstorm. Fog early. High of 68F. Winds less than 5 mph. Chance of rain 50%.
Sunday Night
nt_chancetstorms Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 48F. Winds from the NE at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 50 | 50 57 | 57 60 | 60 49 | 49
Wind 5 mph NE 4 mph NE 6 mph NE 5 mph NE
Humidity 100% 100% 100% 100%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 64% 73% 81% 85%
Conditions Fog Fog Fog Fog
Sunrise & Sunset
5:33 AM
8:01 PM
Source: BestForecast at 8:40 AM CDT on May 03, 2013
Descriptive Forecast
Monday
chancetstorms Mostly cloudy with a chance of a thunderstorm. Fog early. High of 68F. Winds less than 5 mph. Chance of rain 50%.
Monday Night
nt_fog Clear. Fog overnight. Low of 48F. Winds less than 5 mph.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 48 | 48 57 | 57 56 | 56 53 | 53
Wind 3 mph NE 3 mph ENE 4 mph East 4 mph SE
Humidity 100% 100% 100% 100%
Chance of Precip. 10% 10% 10% 10%
Cloud Cover 85% 84% 82% %
Conditions Fog Fog Fog Fog
Sunrise & Sunset
Sun does not rise
Scientific Forecaster Discussion — MOS Weather Graph
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Special Statement
Mobile & Email Alerts Statement as of 7:00 PM CDT on May 03, 2013

... Special Weather Statement...

At 700 PM CDT... National Weather Service Doppler radar indicated a
strong thunderstorm near Orland Park... moving northwest at 35 mph.

One half inch diameter hail... winds to 50 mph... occasional cloud to
ground lightning... brief moderate downpours... are possible with this
storm.

Cities and towns affected...
Orland Park... Mokena... Tinley Park...
Homer Glen... Lockport... Lemont...
Darien... Romeoville... Woodridge...

Other locations affected...
Argonne National laboratory... benedictine University... College of
dupage... DuPage County Fairgrounds... Lewis University... Morton
Arboretum...

Precautionary/preparedness actions...

Gusty winds may cause small branches to be blown down... and loose
objects to blow around. Stay away from high objects outdoors such as
trees. Heavy rainfall could lead to standing water on roadways and
poor visibility. Seek shelter in a sturdy structure until this storm
has passed.


Lat... Lon 4165 8825 4192 8812 4157 8776 4148 8788
time... Mot... loc 0000z 138deg 30kt 4160 8791


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