Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended. Note: Click for Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 434
NWS Storm Prediction Center Norman OK
1200 PM CDT Wed Jun 18 2025
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Northeast Illinois
Northern and Central Indiana
Southwest Lower Michigan
Lake Michigan
* Effective this Wednesday afternoon and evening from NOON until
700 PM CDT.
* Primary threats include...
A few tornadoes likely with a couple intense tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...Intense thunderstorms currently developing over central
Illinois will spread northeastward through the afternoon. High
instability and favorable wind fields will promote a risk of
damaging winds and tornadoes.
The tornado watch area is approximately along and 85 statute miles
east and west of a line from 25 miles north northwest of South Bend
IN to 35 miles south of Bloomington IN. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 432...WW 433...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24035.
...Hart
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 434 TORNADO IL IN MI LM 181700Z - 190000Z
AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
25NNW SBN/SOUTH BEND IN/ - 35S BMG/BLOOMINGTON IN/
..AVIATION COORDS.. 75NM E/W /18NNW GIJ - 59SSE TTH/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24035.
LAT...LON 42028485 38638505 38638819 42028816
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 434 Status Report Messages:
STATUS REPORT #4 ON WW 434
VALID 182115Z - 182240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SSW BMG
TO 5 ESE IND TO 35 W FWA TO 25 ENE SBN TO 25 WSW BEH.
..LYONS..06/18/25
ATTN...WFO...LOT...IWX...IND...
&&
STATUS REPORT FOR WT 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
INC001-003-005-009-013-031-033-035-053-057-059-065-069-071-075-
079-081-087-093-095-097-113-135-139-145-151-159-169-179-183-
182240-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS ALLEN BARTHOLOMEW
BLACKFORD BROWN DECATUR
DE KALB DELAWARE GRANT
HAMILTON HANCOCK HENRY
HUNTINGTON JACKSON JAY
JENNINGS JOHNSON LAGRANGE
LAWRENCE MADISON MARION
NOBLE RANDOLPH RUSH
SHELBY STEUBEN TIPTON
WABASH WELLS WHITLEY
$$
MIC023-149-182240-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BRANCH ST. JOSEPH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 434
VALID 182015Z - 182140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1349 AND 1351.
..GRAMS..06/18/25
ATTN...WFO...LOT...IWX...IND...
&&
STATUS REPORT FOR WT 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC053-063-075-091-105-197-182140-
IL
. ILLINOIS COUNTIES INCLUDED ARE
FORD GRUNDY IROQUOIS
KANKAKEE LIVINGSTON WILL
$$
INC001-003-005-007-009-011-013-015-017-021-023-027-031-033-035-
039-045-049-053-055-057-059-063-065-067-069-071-073-075-079-081-
083-085-087-089-091-093-095-097-099-101-103-105-107-109-111-113-
119-121-127-131-133-135-139-141-145-149-151-153-157-159-165-167-
169-171-179-181-183-182140-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS ALLEN BARTHOLOMEW
BENTON BLACKFORD BOONE
BROWN CARROLL CASS
CLAY CLINTON DAVIESS
DECATUR DE KALB DELAWARE
ELKHART FOUNTAIN FULTON
GRANT GREENE HAMILTON
HANCOCK HENDRICKS HENRY
HOWARD HUNTINGTON JACKSON
JASPER JAY JENNINGS
JOHNSON KNOX KOSCIUSKO
LAGRANGE LAKE LA PORTE
LAWRENCE MADISON MARION
MARSHALL MARTIN MIAMI
MONROE MONTGOMERY MORGAN
NEWTON NOBLE OWEN
PARKE PORTER PULASKI
PUTNAM RANDOLPH RUSH
ST. JOSEPH SHELBY STARKE
STEUBEN SULLIVAN TIPPECANOE
TIPTON VERMILLION VIGO
WABASH WARREN WELLS
WHITE WHITLEY
$$
MIC021-023-027-149-182140-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BERRIEN BRANCH CASS
ST. JOSEPH
$$
LMZ043-046-080-743-744-745-779-182140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NEW BUFFALO MI TO ST JOSEPH MI
MICHIGAN CITY IN TO NEW BUFFALO MI
LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO
MID-LINE OF LAKE.
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 434
VALID 181925Z - 182040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GRAMS..06/18/25
ATTN...WFO...LOT...IWX...IND...
&&
STATUS REPORT FOR WT 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC053-063-075-091-105-197-182040-
IL
. ILLINOIS COUNTIES INCLUDED ARE
FORD GRUNDY IROQUOIS
KANKAKEE LIVINGSTON WILL
$$
INC001-003-005-007-009-011-013-015-017-021-023-027-031-033-035-
039-045-049-053-055-057-059-063-065-067-069-071-073-075-079-081-
083-085-087-089-091-093-095-097-099-101-103-105-107-109-111-113-
119-121-127-131-133-135-139-141-145-149-151-153-157-159-165-167-
169-171-179-181-183-182040-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS ALLEN BARTHOLOMEW
BENTON BLACKFORD BOONE
BROWN CARROLL CASS
CLAY CLINTON DAVIESS
DECATUR DE KALB DELAWARE
ELKHART FOUNTAIN FULTON
GRANT GREENE HAMILTON
HANCOCK HENDRICKS HENRY
HOWARD HUNTINGTON JACKSON
JASPER JAY JENNINGS
JOHNSON KNOX KOSCIUSKO
LAGRANGE LAKE LA PORTE
LAWRENCE MADISON MARION
MARSHALL MARTIN MIAMI
MONROE MONTGOMERY MORGAN
NEWTON NOBLE OWEN
PARKE PORTER PULASKI
PUTNAM RANDOLPH RUSH
ST. JOSEPH SHELBY STARKE
STEUBEN SULLIVAN TIPPECANOE
TIPTON VERMILLION VIGO
WABASH WARREN WELLS
WHITE WHITLEY
$$
MIC021-023-027-149-182040-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BERRIEN BRANCH CASS
ST. JOSEPH
$$
LMZ043-046-080-743-744-745-779-182040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NEW BUFFALO MI TO ST JOSEPH MI
MICHIGAN CITY IN TO NEW BUFFALO MI
LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO
MID-LINE OF LAKE.
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 434
VALID 181830Z - 181940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1346.
..GRAMS..06/18/25
ATTN...WFO...LOT...IWX...IND...
&&
STATUS REPORT FOR WT 434
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ILC053-063-075-091-105-197-181940-
IL
. ILLINOIS COUNTIES INCLUDED ARE
FORD GRUNDY IROQUOIS
KANKAKEE LIVINGSTON WILL
$$
INC001-003-005-007-009-011-013-015-017-021-023-027-031-033-035-
039-045-049-053-055-057-059-063-065-067-069-071-073-075-079-081-
083-085-087-089-091-093-095-097-099-101-103-105-107-109-111-113-
119-121-127-131-133-135-139-141-145-149-151-153-157-159-165-167-
169-171-179-181-183-181940-
IN
. INDIANA COUNTIES INCLUDED ARE
ADAMS ALLEN BARTHOLOMEW
BENTON BLACKFORD BOONE
BROWN CARROLL CASS
CLAY CLINTON DAVIESS
DECATUR DE KALB DELAWARE
ELKHART FOUNTAIN FULTON
GRANT GREENE HAMILTON
HANCOCK HENDRICKS HENRY
HOWARD HUNTINGTON JACKSON
JASPER JAY JENNINGS
JOHNSON KNOX KOSCIUSKO
LAGRANGE LAKE LA PORTE
LAWRENCE MADISON MARION
MARSHALL MARTIN MIAMI
MONROE MONTGOMERY MORGAN
NEWTON NOBLE OWEN
PARKE PORTER PULASKI
PUTNAM RANDOLPH RUSH
ST. JOSEPH SHELBY STARKE
STEUBEN SULLIVAN TIPPECANOE
TIPTON VERMILLION VIGO
WABASH WARREN WELLS
WHITE WHITLEY
$$
MIC021-023-027-149-181940-
MI
. MICHIGAN COUNTIES INCLUDED ARE
BERRIEN BRANCH CASS
ST. JOSEPH
$$
LMZ043-046-080-743-744-745-779-181940-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NEW BUFFALO MI TO ST JOSEPH MI
MICHIGAN CITY IN TO NEW BUFFALO MI
LAKE MICHIGAN MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO
MID-LINE OF LAKE.
CALUMET HARBOR IL TO GARY IN
GARY TO BURNS HARBOR IN
BURNS HARBOR TO MICHIGAN CITY IN
LAKE MICHIGAN FROM WILMETTE HARBOR TO MICHIGAN CITY IN 5NM
OFFSHORE TO MID LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Probability of 1 or more strong (EF2-EF5) tornadoes
Mod (30%)
Wind
Probability of 10 or more severe wind events
High (70%)
Probability of 1 or more wind events > 65 knots
Mod (30%)
Hail
Probability of 10 or more severe hail events
Mod (40%)
Probability of 1 or more hailstones > 2 inches
Low (20%)
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
High (90%)
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The “Low” category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
“Moderate” from 30% to 60%, and “High” from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
