Regional Weather Roundup
Issued by NWS

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136
ASUS43 KLOT 211258
RWRIL

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
800 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.

ILZ001-002-007-009-015-016-024-211400-
NORTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
MOLINE         CLOUDY    59  57  93 E14       30.09R FOG     TC  15
STERLING*      CLOUDY    59  57  94 E13       30.12S TC  15
$$

ILZ003-004-008-010-011-017-018-211400-
NORTH CENTRAL ILLINOIS

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

ILZ005-006-012>014-019>023-211400-
NORTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  CLOUDY    60  54  80 E12G22    30.13R TC  16
CHICAGO-MIDWAY NOT AVBL
AURORA         CLOUDY    60  56  86 NE12G21   30.12R TC  16
WAUKEGAN       CLOUDY    61  54  77 E17G25    30.15R TC  16
DUPAGE AIRPORT CLOUDY    60  55  83 E12       30.13R TC  16
WHEELING       CLOUDY    61  54  77 E9        30.15R TC  16
NORTHERLY ISL*   N/A     60  55  83 NE17        N/A  TC  16
$$

LMZ740>746-211400-
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            63 64   60/ 19/ 27 1015.7S         6/ 6
WAUKEGAN HARBOR            63 64   30/ 19/ 27 1020.3R         5/ 6
WILMETTE BUOY              62     110/ 19/ 27 1021.8R         6/ 5
CHICAGO BUOY               62 65              1018.8R         6/ 7
NORTHERLY ISL              60      70/ 15/ 20   N/A
CALUMET HARBOR             60      40/ 13/ 19 1019.8
MICH CITY BUOY             57 57   50/ 10/ 16   N/A           5/ 7
ST. JOSEPH BUOY            57 53   70/ 10/ 12 1020.9R         4/ 6
$$

ILZ025>027-034>036-040-047-049-050-058-095>099-211400-
WEST-CENTRAL ILLINOIS

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

ILZ028>032-037-038-041>044-048-051>054-059>061-211400-
CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PEORIA         NOT AVBL
SPRINGFIELD    CLOUDY    62  59  90 NE10      30.03R TC  17
TAYLORVILLE    NOT AVBL
$$

ILZ033-039-045-046-055>057-062-063-211400-
EAST-CENTRAL ILLINOIS

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

ILZ079-100>102-211400-
SOUTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          CLOUDY    66  66 100 N6        30.00R FOG     TC  19
$$

ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-211400-
SOUTH-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     NOT AVBL
MARION         PTSUNNY   72  66  83 N6        29.98R TC  22
$$

ILZ067-068-072-073-078-083-087-091-211400-
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
$$