553 
WUUS53 KIWX 181713
SVRIWX
INC099-141-181800-
/O.NEW.KIWX.SV.W.0136.260518T1713Z-260518T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
113 PM EDT Mon May 18 2026

The National Weather Service in Northern Indiana has issued a

* Severe Thunderstorm Warning for...
  St. Joseph County in north central Indiana...
  Marshall County in north central Indiana...

* Until 200 PM EDT.

* At 112 PM EDT, a severe thunderstorm was located over Koontz Lake,
  or 10 miles northeast of Knox, moving east at 65 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  South Bend, Mishawaka, Plymouth, Bremen, Gulivoire Park, Granger,
  Osceola, Walkerton, North Liberty, New Carlisle, Bourbon,
  Lakeville, Roseland, Koontz Lake, La Paz, Indian Village,
  Teegarden, Chain-o-lakes, Crumstown, and Tyner.

This includes Interstate 80 in Indiana between mile markers 62 and
87.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4152 8650 4156 8650 4157 8649 4165 8649
      4165 8653 4176 8652 4176 8606 4127 8606
      4123 8647 4143 8647 4143 8652 4151 8653
TIME...MOT...LOC 1712Z 248DEG 56KT 4142 8650 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brown

111 
WWUS53 KIWX 181738
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
138 PM EDT Mon May 18 2026

INC099-141-181800-
/O.CON.KIWX.SV.W.0136.000000T0000Z-260518T1800Z/
St. Joseph IN-Marshall IN-
138 PM EDT Mon May 18 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT
FOR ST. JOSEPH AND NORTHERN MARSHALL COUNTIES...

At 138 PM EDT, a severe thunderstorm was located over Wakarusa, or
near Dunlap, moving east at 65 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
South Bend, Mishawaka, Plymouth, Bremen, Gulivoire Park, Granger,
Osceola, North Liberty, New Carlisle, Bourbon, Lakeville, Roseland,
La Paz, Indian Village, Teegarden, Chain-o-lakes, Crumstown, Tyner,
Woodland, and Lydick.

This includes Interstate 80 in Indiana between mile markers 65 and
87.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of natures leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4155 8643 4176 8648 4176 8606 4127 8606
      4124 8636 4145 8642
TIME...MOT...LOC 1738Z 248DEG 56KT 4157 8600 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Brown

541 
WWUS53 KIWX 181753
SVSIWX

Severe Weather Statement
National Weather Service Northern Indiana
153 PM EDT Mon May 18 2026

INC099-141-181803-
/O.EXP.KIWX.SV.W.0136.000000T0000Z-260518T1800Z/
St. Joseph IN-Marshall IN-
153 PM EDT Mon May 18 2026

...THE SEVERE THUNDERSTORM WARNING FOR ST. JOSEPH AND MARSHALL
COUNTIES WILL EXPIRE AT 200 PM EDT...

The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However, heavy
rain is still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
north central Indiana...and southwestern Michigan.

&&

LAT...LON 4155 8643 4176 8648 4176 8606 4127 8606
      4124 8636 4145 8642
TIME...MOT...LOC 1753Z 248DEG 56KT 4165 8572 

$$

DN