399
ASUS43 KLOT 181556
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1100 AM CDT MON MAY 18 2026
NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR S TO VISIBILITY.
* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
REPORT WEATHER SUCH AS PRECIPITATION OR FOG.
ILZ001-002-007-009-015-016-024-181700-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLOUDY 70 63 78 VRB3 29.76R TC 21
ILZ003-004-008-010-011-017-018-181700-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 69 65 86 SE10 29.79F TC 21
ILZ005-006-012>014-019>023-181700-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE CLOUDY 76 65 68 SW15 29.83F THUNDER TC 24
CHICAGO-MIDWAY NOT AVBL
AURORA TSTM 67 66 97 CALM 29.82F FOG TC 19
WAUKEGAN CLOUDY 75 66 73 SW16 29.82S TC 24
DUPAGE AIRPORT TSTM 69 68 96 SW17G31 29.86R VSB 1 TC 21
WHEELING LGT RAIN 75 66 73 SW12 29.83F TC 24
MORRIS* TSTM 68 64 88 NW12G22 29.86R TC 20
ROMEOVILLE* TSTM 72 70 94 SW17G35 29.88R FOG TC 22
NORTHERLY ISL* N/A 77 64 64 S3 N/A TC 25
LMZ740>746-181700-
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 49 1018.5F 2/ 4
WAUKEGAN HARBOR 64 51 200/ 10/ 16 1011.0R 2/ 3
WILMETTE BUOY 67 200/ 14/ 19 1012.2F 1/ 3
CHICAGO BUOY 64 54 200/ 6/ 14 1009.8F 1/ 3
HARRISON CRIB 78 200/ 22/ 23 N/A
NORTHERLY ISL 76 190/ 11/ 19 N/A
CALUMET HARBOR 190/ 7/ 10 1010.9
BURNS HARBOR 80 200/ 13/ 17 1011.9F
MICHIGAN CITY 81 180/ 16/ 19 1009.9F
ST. JOSEPH BUOY 65 190/ 10/ 14 1012.7F 2/ 2
ILZ025>027-034>036-040-047-049-050-058-095>099-181700-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ILZ028>032-037-038-041>044-048-051>054-059>061-181700-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
DECATUR PTSUNNY 65 64 97 W6 29.99S THUNDER FOG
PEORIA NOT AVBL
SPRINGFIELD LGT RAIN 67 64 90 SE7 29.95R TC 19
TAYLORVILLE CLOUDY 64 64 100 NW7 29.99R TC 18
ILZ033-039-045-046-055>057-062-063-181700-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN TSTM 66 64 94 W20G28 30.00R TC 19
MATTOON CLOUDY 75 69 81 S12 29.97R TC 24
ILZ079-100>102-181700-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON TSTM 66 64 94 NE6 30.00R TC 19
BELLEVILLE LGT RAIN 70 66 88 CALM 29.96R TC 21
CAHOKIA* LGT RAIN 67 66 97 N9 29.97 TC 19
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181700-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE PTSUNNY 80 70 71 S15G30 29.99S HX 83 TC 27
MARION PTSUNNY 81 72 74 S16G26 30.00S HX 84 TC 27
ILZ067-068-072-073-078-083-087-091-181700-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE MOSUNNY 85 69 58 S24G33 29.99S HX 89 TC 29
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page