Temperature change images (courtesy of NOAA’s Midwestern Regional Climate Center) -- click to enlarge:

Temperature at noon January 29
Temperatures at noon
Tuesday

Temperature fall between noon and 6 pm
Change from noon to 6 pm
Tuesday

Change from noon Tuesday to 7 am Wednesday
Change from noon
Tuesday to 7 am Wed.

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
943 AM CST WED JAN 30 2008

...LARGE TEMPERATURE RANGES ON TUESDAY APPROACH RECORDS...

THE PASSAGE OF A STRONG COLD FRONT YESTERDAY BROUGHT A WIDE VARIATION
IN TEMPERATURES TO CENTRAL AND SOUTHEAST ILLINOIS. LOCATIONS THAT
WERE WELL INTO THE 60S EARLY TUESDAY AFTERNOON HAD FALLEN TO NEAR
ZERO BY THIS MORNING. TEMPERATURE DROPS OF 20 TO 40 DEGREES IN JUST
A COUPLE HOURS WERE COMMON IMMEDIATELY FOLLOWING THE FRONTAL
PASSAGE. THE HUGE TEMPERATURE RANGE APPROACHED RECORDS IN SOME AREAS.

THE FOLLOWING ARE CALENDAR DAY OBSERVATIONS:

AT SPRINGFIELD...THE SPAN BETWEEN HIGH AND LOW TEMPERATURE YESTERDAY
WAS 54 DEGREES (HIGH OF 64 AND A LOW OF 9). THIS IS THE THIRD
GREATEST TEMPERATURE RANGE ON RECORD. THE RECORD IS 57 DEGREES...
FIRST SET ON NOVEMBER 11 1911 (HIGH 76 AND LOW 19)...AND TIED JANUARY
18 1996 (HIGH 60 AND LOW 3).

AT PEORIA...THE OBSERVED TEMPERATURE SPAN WAS ALSO 54 DEGREES (HIGH
58 AND LOW 4). THIS TIED FOR THE 3RD GREATEST RANGE ON RECORD. THE
RECORD IS A 60 DEGREE SPAN...SET ON NOVEMBER 11 1911 (HIGH 77 AND LOW
17).

AT LINCOLN...THE SPAN BETWEEN HIGH (62) AND LOW (6) WAS 56 DEGREES...
THE THIRD LARGEST RANGE ON RECORD. THE RECORD WAS A 61 DEGREE SPAN ON
JANUARY 18 1996 (HIGH 59 AND LOW -2).


AMONG THE COOPERATIVE WEATHER OBSERVER NETWORK...THE LARGEST
TEMPERATURE RANGES REPORTED FROM YESTERDAY AFTERNOON TO THIS
MORNING (24-HOUR PERIOD ENDING AROUND 7 AM):

LOCATION            HIGH      LOW     DIFFERENCE
========            ====      ===     ==========
ATHENS               65        5      60 DEGREES
JACKSONVILLE         66        5      61 DEGREES
MASON CITY           61        2      59 DEGREES
WINCHESTER           67        6      61 DEGREES

WHEN TAKING THIS TIME PERIOD INTO ACCOUNT...THE TEMPERATURE DROP AT
SPRINGFIELD WAS 57 DEGREES...PEORIA 56 DEGREES...AND LINCOLN 58
DEGREES.


$$


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