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MAY 26, 2008

PNEUMONIA FRONT

NORTHERN ILLINOIS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
927 PM CDT MON MAY 26 2008
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-
KENDALL-WILL-LAKE IN-PORTER-
INCLUDING THE CITIES OF...ROCKFORD...WOODSTOCK...WAUKEGAN...
OREGON...DIXON...DEKALB...AURORA...CHICAGO...OSWEGO...JOLIET...
GARY...VALPARAISO
927 PM CDT MON MAY 26 2008

...PNEUMONIA FRONT MOVING DOWN WESTERN LAKE MICHIGAN...

A PNEUMONIA FRONT CURRENTLY IN FAR SOUTHEAST WISCONSIN WILL
CONTINUE TO RAPIDLY DROP SOUTHWARD INTO NORTHERN ILLINOIS AND
INDIANA TONIGHT. THIS FRONT HAS BEEN MARKED BY A DRASTIC CHANGE IN
TEMPERATURES AND A STRONG WIND SHIFT. TEMPERATURES ALONG THE
LAKE FRONT HAVE DROPPED FROM THE LOW TO MID 70S TO THE MID TO
UPPER 40S AS THE FRONT PASSES. WINDS HAVE SHIFTED FROM BEING LIGHT
AND OUT OF THE WEST TO OUT OF THE NORTHEAST AND GUSTING UP TO 40
MPH AT TIMES ALONG THE LAKE. THIS FRONT WILL BE INTO LAKE AND
MCHENRY COUNTIES BY 10PM...COOK...DUPAGE..KANE...DEKALB...AND
BOONE COUNTIES BY 1045PM...AND THE REST OF NORTHWEST INDIANA AND
NORTH CENTRAL ILLINOIS BY MIDNIGHT CDT.

A PNEUMONIA FRONT IS A RARE...METEOROLOGICAL PHENOMENA THAT IS
TYPICALLY OBSERVED ALONG THE WESTERN LAKE MICHIGAN SHORELINE
DURING THE WARM SEASON. THESE FRONTS ARE DEFINED AS LAKE MODIFIED
SYNOPTIC SCALE COLD FRONTS THAT RESULT IN ONE HOUR TEMPERATURE
DROPS OF 16 DEGREES FAHRENHEIT OR GREATER.

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SPC storm reports for the day : http://www.spc.noaa.gov/climo/reports/080526_rpts.html