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Illinois, De Kalb

Special Statement

Statement as of 3:42 PM CDT on May 23, 2013

Expires 10:30 PM EDT on May 23, 2013


... Patchy frost possible tonight...

An unseasonably strong area of surface high pressure is expected
to dominate the weather across the mid and upper Mississippi
Valley tonight. The combination of clear skies and light winds
under this high will allow temperatures to drop into the middle
to upper 30s across northern Illinois tonight. Temperatures this
cold could result in the development of some patchy frost across
the area later tonight... especially in low lying areas. Although
widespread frost is not expected... any frost that does form could
result in damage to sensitive vegetation if left unprotected.
Temperatures should quickly warm after sunrise on Friday... ending
the threat.


Kjb

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334 PM CDT Thu may 23 2013

... Patchy fog possible tonight...

An unseasonably strong area of surface high pressure is expected
to dominate the weather across the mid and upper Mississippi
Valley tonight. The combination of clear skies and light winds
under this high will allow temperatures to drop into the middle
to upper 30s across northern Illinois tonight. Temperatures this
cold could result in the development of some patchy frost across
the area later tonight... especially in low lying areas. Although
widespread frost is not expected... any frost that does form could
result in damage to sensitive vegetation if left unprotected.
Temperatures should quickly warm after sunrise on Friday... ending
the threat.


Kjb

Visit US at http://weather.Gov/Chicago (all lowercase)

Follow US on facebook... twitter... and youtube at:
www.Facebook.Com/US.Nationalweatherservice.Chicago.Gov
www.Twitter.Com/nwschicago
www.Youtube.Com/nwschicago

Public Information Statement

Statement as of 1:29 PM CDT on May 23, 2013


... Severe weather stats to date..

The severe weather season became much more active in the past ten
days including in parts of the Midwest. Significant tornado
events in Moore Oklahoma on may 20th and in Texas on may 15th
highlighted this active period.

Despite numerous periods of thunderstorms across the NWS Chicago
County Warning Area /cwa/ on may 19th-21st... the number of
reports thus far remains below normal. Across the Chicago
cwa... there have been 25 preliminary reports of severe weather.
This criteria includes hail of diameter one inch or larger... wind
damage... or wind gusts of 58 mph or stronger. Here is a look at
the number of reports vs normal:


All data through may 23rd...
                         2013* 20-year median 5-year median
severe weather reports 25 42 38
tornado reports 0 2 2

* preliminary

In the past decade... only 2010 had started with fewer severe reports
through this time. However... to show how that cannot be taken as a
strong predictor for the rest of the season... June 2010 would see a
considerable increase in severe weather including numerous tornadoes
on June 5th.


For warnings issued by the NWS Chicago office:

All data through may 23rd...
                         2013 20-year median 5-year median*
svr T-storm warnings 20 46 28
tornado warnings 0 5 3

* this period entails storm-based warnings instead of County-based
warnings used prior.


While there are chances of thunderstorms this Holiday weekend into
next week... the overall weather pattern is not as conducive for severe
storms at this past week. But the severe weather season is still
near its peak going into June and tails off slowly through Summer. The
recent severe and tornadic weather across the nation should serve as a
reminder of the importance of preparedness and having a plan of action.


Weather Severe Map
Alabama - Fire Weather Watch
Alaska - Areal Flood Watch , Special Weather Statement
Arizona - Wind Advisory , Fire Weather Warning
Arkansas - Flood Warning , Flood Advisory , Public Information Statement
California - Wind Advisory , Record Report , Public Information Statement
Colorado - Wind Advisory , Fire Weather Watch , Fire Weather Watch, Fire Weather Warning , Fire Weather Warning, Fire Weather Watch , Fire Weather Warning , Special Statement
Connecticut - Flash Flood Warning , Areal Flood Advisory , Flash Flood Watch , Record Report , Public Information Statement
Florida - Fire Weather Watch , Special Statement
Georgia - Flood Warning , Public Information Statement
Hawaii - Wind Advisory
Idaho - Frost Advisory , Winter Weather Advisory , Record Report
Illinois - Flood Warning , Flood Advisory , Special Statement , Public Information Statement
Indiana - Beach Hazard Statement , Public Information Statement
Iowa - Flood Warning , Public Information Statement
Kansas - Special Statement , Public Information Statement
Louisiana - Flood Warning , Areal Flood Warning , Public Information Statement
Maine - Areal Flood Advisory , Public Information Statement
Massachusetts - Areal Flood Advisory, Flash Flood Watch , Areal Flood Advisory , Record Report , Public Information Statement
Michigan - Flood Warning , Flood Advisory , Frost Advisory , Beach Hazard Statement , Public Information Statement
Minnesota - Flood Warning , Frost Advisory , Public Information Statement
Mississippi - Flood Warning , Flood Advisory
Missouri - Flood Warning , Public Information Statement
Montana - High Wind Warning , Lake Wind Advisory , Winter Weather Advisory , Winter Storm Warning , Record Report , Public Information Statement
Nebraska - Wind Advisory , Public Information Statement
Nevada - Wind Advisory
New Hampshire - Areal Flood Advisory , Public Information Statement
New Jersey - Flash Flood Warning , Areal Flood Warning , Areal Flood Advisory
New Mexico - Severe Thunderstorm Watch , Severe Thunderstorm Warning , Fire Weather Warning , Special Statement
New York - Flash Flood Warning , Areal Flood Advisory , Flash Flood Watch , Special Statement , Special Weather Statement , Record Report , Public Information Statement
North Carolina - Flood Watch / Flood Statement , Areal Flood Advisory , Special Statement , Special Weather Statement , Record Report , Public Information Statement
North Dakota - Areal Flood Warning , Areal Flood Warning , Flood Warning , Flood Watch , Flash Flood Watch , Wind Advisory , Public Information Statement
Ohio - Record Report
Oklahoma - Tornado Watch , Flood Warning , Areal Flood Advisory , Special Weather Statement , Public Information Statement
Oregon - Special Statement , Record Report , Public Information Statement
Pennsylvania - Severe Thunderstorm Warning , Areal Flood Advisory , Special Statement , Record Report
Puerto Rico - Areal Flood Advisory
Rhode Island - Coastal Flood Advisory
South Carolina - Severe Thunderstorm Warning , Flood Warning , Special Statement , Public Information Statement
South Dakota - Wind Advisory , High Wind Warning , High Wind Warning, Wind Advisory , Public Information Statement
Tennessee - Flood Warning , Flood Advisory , Public Information Statement
Texas - Severe Thunderstorm Watch , Tornado Warning , Tornado Watch , Severe Thunderstorm Warning , Areal Flood Advisory , Special Statement , Record Report , Public Information Statement
Utah - Wind Advisory
Vermont - Areal Flood Advisory, Flash Flood Watch , Flash Flood Watch , Special Weather Statement , Special Statement , Record Report , Public Information Statement
Virginia - Severe Thunderstorm Warning , Flash Flood Warning , Special Statement , Special Weather Statement , Record Report , Public Information Statement
Washington - Flood Watch , Special Statement , Record Report , Public Information Statement
West Virginia - Flash Flood Warning , Flash Flood Watch , Record Report , Public Information Statement
Wisconsin - Flood Warning , Frost Advisory , Freeze Warning
Wyoming - High Wind Warning , Special Statement , Air Quality Alert
- Small Craft Advisory
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