Regional Weather Roundup
Issued by NWS

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811
ASUS43 KLOT 210156
RWRIL

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
900 PM CDT MON JUL 20 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.

ILZ001-002-007-009-015-016-024-210300-
NORTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
MOLINE         MOCLDY    75  72  90 SW8       29.75S TC  24
$$

ILZ003-004-008-010-011-017-018-210300-
NORTH CENTRAL ILLINOIS

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

ILZ005-006-012>014-019>023-210300-
NORTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  CLOUDY    78  68  71 SW12G24   29.70F HAZE    HX  80
CHICAGO-MIDWAY NOT AVBL
AURORA         CLOUDY   N/A N/A N/A SW7       29.72F SMOKE
WAUKEGAN       PTCLDY    75  69  81 SW12      29.68F TC  24
DUPAGE AIRPORT CLOUDY    74  70  87 SW10      29.71F TC  23
WHEELING       MOCLDY    78  69  73 SW9       29.72F HX  80  TC  26
NORTHERLY ISL*   N/A     78  66  66 S9          N/A  HX  80  TC  26
$$

LMZ740>746-210300-
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            78 75              1006.6R         2/ 4
WAUKEGAN HARBOR            78 74              1007.3F         2/ 4
WILMETTE BUOY              79     210/ 16/ 21 1009.1F         2/ 4
CHICAGO BUOY               79 75  220/ 12/ 17 1005.4F         1/ 3
HARRISON CRIB              80     220/ 16/ 20   N/A
NORTHERLY ISL              79     220/  8/ 18   N/A
CALUMET HARBOR                    200/ 12/ 18 1006.9
BURNS HARBOR                                  1007.8F
MICHIGAN CITY              78     190/  9/ 12 1005.6S
MICH CITY BUOY             77 76  210/ 14/ 17   N/A           1/ 3
ST. JOSEPH BUOY            76 74  190/ 12/ 14 1008.1F         2/ 3
$$

ILZ025>027-034>036-040-047-049-050-058-095>099-210300-
WEST-CENTRAL ILLINOIS

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

ILZ028>032-037-038-041>044-048-051>054-059>061-210300-
CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PEORIA         NOT AVBL
SPRINGFIELD    CLOUDY    79  75  87 CALM      29.87R HX  83  TC  26
TAYLORVILLE    NOT AVBL
$$

ILZ033-039-045-046-055>057-062-063-210300-
EAST-CENTRAL ILLINOIS

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

ILZ079-100>102-210300-
SOUTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          CLEAR     82  75  78 S6        29.84R HX  89  TC  28
$$

ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-210300-
SOUTH-CENTRAL ILLINOIS

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

ILZ067-068-072-073-078-083-087-091-210300-
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
$$