Regional Weather Roundup
Issued by NWS

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744
ASUS43 KLOT 181056
RWRIL

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
600 AM CDT TUE AUG 18 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
  REPORT WEATHER SUCH AS PRECIPITATION OR FOG.

ILZ001-002-007-009-015-016-024-181200-
NORTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
MOLINE         MOCLDY    66  63  90 CALM      30.02F TC  19
$$

ILZ003-004-008-010-011-017-018-181200-
NORTH CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ROCKFORD       NOT AVBL
$$

ILZ005-006-012>014-019>023-181200-
NORTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  PTCLDY    66  62  87 SW6       30.01S TC  19
CHICAGO-MIDWAY NOT AVBL
AURORA         PTCLDY    61  61 100 SW3       30.03S TC  16
WAUKEGAN       PTCLDY    64  61  90 W5        30.00R TC  18
DUPAGE AIRPORT PTCLDY    63  62  97 CALM      30.02S TC  17
WHEELING       PTCLDY    63  61  93 CALM      30.02F TC  17
ROMEOVILLE*    CLEAR     66  66 100 SW5       30.04S TC  19
NORTHERLY ISL*   N/A     68  61  78 W5          N/A  TC  20
$$

LMZ740>746-181200-
SOUTHERN LAKE MICHIGAN

STATION/POSITION SKY/WX   TEMP    WIND        PRES    VSBY  WAVE
                          AIR SEA DIR/SP/G                  HT/PER
                          (F)     (DEG/KT/KT) (MB)    (MI)  (FT/S)
WINTHROP HARBOR            68 74  260/ 10/ 14 1015.2S         1
WAUKEGAN HARBOR            69 74  260/ 10/ 12 1016.2S         1
WILMETTE BUOY              71     260/ 12/ 16 1018.7F         1/ 2
CHICAGO BUOY               71 73              1015.2S         1
HARRISON CRIB              73     240/ 11/ 13   N/A
NORTHERLY ISL              69     260/  4/  9   N/A
CALUMET HARBOR                    240/  3/  5 1016.9
MICHIGAN CITY              68     220/  9/ 10 1015.4R
MICH CITY BUOY             72 74  240/ 12/ 16   N/A           2/ 3
ST. JOSEPH BUOY            73 74  250/ 12/ 16 1017.2R         2/ 3
$$

ILZ025>027-034>036-040-047-049-050-058-095>099-181200-
WEST-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
$$

ILZ028>032-037-038-041>044-048-051>054-059>061-181200-
CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PEORIA         NOT AVBL
SPRINGFIELD    PTCLDY    63  62  97 CALM      30.06S TC  17
TAYLORVILLE    NOT AVBL
$$

ILZ033-039-045-046-055>057-062-063-181200-
EAST-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
$$

ILZ079-100>102-181200-
SOUTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CAHOKIA*       CLEAR     64  64 100 CALM      30.06S TC  18
$$

ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181200-
SOUTH-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     NOT AVBL
$$

ILZ067-068-072-073-078-083-087-091-181200-
SOUTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
$$

ABBREVIATIONS USED IN REMARKS
   TC - TEMPERATURE IN CELSIUS
  WCI - WIND CHILL INDEX
   HX - HEAT INDEX
  VSB - VISIBILITY
$$