Regional Weather Roundup
Issued by NWS

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709
ASUS43 KLOT 211458
RWRIL

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1000 AM CDT MON SEP 21 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.

ILZ001-002-007-009-015-016-024-211600-
NORTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
MOLINE         CLOUDY    60  57  89 NE15      30.11R TC  16
$$

ILZ003-004-008-010-011-017-018-211600-
NORTH CENTRAL ILLINOIS

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

ILZ005-006-012>014-019>023-211600-
NORTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  CLOUDY    61  54  77 E13G23    30.15R TC  16
CHICAGO-MIDWAY NOT AVBL
AURORA         CLOUDY    61  56  83 NE13      30.13S TC  16
WAUKEGAN       CLOUDY    61  54  77 NE16G30   30.18R TC  16
DUPAGE AIRPORT CLOUDY    61  55  81 E13       30.15R TC  16
WHEELING       CLOUDY    61  55  81 E9G21     30.18R TC  16
NORTHERLY ISL*   N/A     60  54  80 NE18        N/A  TC  16
$$

LMZ740>746-211600-
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            62 64   60/ 19/ 27 1016.7R         6/ 6
WAUKEGAN HARBOR            63 64   30/ 19/ 27 1020.8R         6/ 6
WILMETTE BUOY              62     100/ 19/ 29 1022.6R         6/ 6
CHICAGO BUOY               62 65              1019.7R         5/ 7
NORTHERLY ISL              59      60/ 17/ 20   N/A
CALUMET HARBOR             60      40/ 13/ 18 1020.6
MICH CITY BUOY             57 57   50/ 14/ 17   N/A           4/ 6
ST. JOSEPH BUOY            57 53   50/ 10/ 14 1021.6R         3/ 5
$$

ILZ025>027-034>036-040-047-049-050-058-095>099-211600-
WEST-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
QUINCY         CLOUDY    63  63 100 E9        30.07R FOG     TC  17
$$

ILZ028>032-037-038-041>044-048-051>054-059>061-211600-
CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PEORIA         NOT AVBL
SPRINGFIELD    CLOUDY    63  60  90 E10       30.06R TC  17
TAYLORVILLE    NOT AVBL
$$

ILZ033-039-045-046-055>057-062-063-211600-
EAST-CENTRAL ILLINOIS

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

ILZ079-100>102-211600-
SOUTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          CLOUDY    68  66  94 NE7       30.03R TC  20
$$

ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-211600-
SOUTH-CENTRAL ILLINOIS

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

ILZ067-068-072-073-078-083-087-091-211600-
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
$$