OUTLOOKS: NWS Hazardous Weather Outlook Lake County SKYWARN Severe Weather Outlook
FORMAT: Decoded Original

NWS Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville Illinois
434 PM CST Monday January 28 2013

Winnebago-Boone-McHenry-Lake Illinois-Ogle-Lee-De Kalb-Kane-
dupage-Cook-La Salle-Kendall-Grundy-Will-Kankakee-Livingston-
Iroquois-Ford-434 PM CST Monday January 28 2013 /534 PM est Monday January 28 2013/

This Hazardous Weather Outlook is for north central Illinois,
northeast Illinois and northwest Indiana.  


weather hazards expected:

locally dense fog.  

scattered thunderstorms, some May produce:
heavy downpours.  
cloud to ground lightning.  
and small hail.  

areas affected and timing:

areas of dense fog have spread north through central Illinois
and Indiana to just north of the Illinois and Kankakee river
valleys.  It is possible that the dense fog May spread north to
the Interstate 80 corridor, especially over more rural areas.  
there is a chance that the fog May spread farther north of i-80
later tonight.  

scattered thunderstorms will likely develop late this evening
and continue into the overnight hours, with the greatest
coverage of thunderstorms is likely to be north of Interstate


a weak front will stall out over central Illinois and Indiana
with dense fog along and north of the front through tonight as
winds diminish.  Fog should tend to dissipate overnight as warm
air surges north into the region as the front lifts north

also as the front lifts back north tonight, scattered
thunderstorms are forecast to develop.  While severe weather
appears unlikely overnight tonight due to weak
instability, cold air aloft could allow for some small hail
along with heavy rain with the stronger storms.  


thunderstorms are possible Tuesday morning and early afternoon
but will become more likely by late Tuesday afternoon and
evening.  Very strong winds aloft and increasing moisture near
the surface will create an environment favorable for severe
thunderstorms should sufficient instability develop.  The
greatest severe threat will be for strong damaging winds, but
an isolated tornado cannot be ruled out.  

while there is a risk of severe thunderstorms, the greater
threat to the region will be from heavy rainfall and flooding.  
widespread rainfall totals of one to two inches appear likely
with localized amounts in excess of three inches possible by
Wednesday morning.  Rainfall of this magnitude will likely result
in flooding, potentially significant flooding.  

there is a chance of accumulating snow on Wednesday.  


Spotter activation will not be necessary through tonight.  

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