Alert archive / Indiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 79, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Aug 11, 2021, 11:15 AM CDT for 4 counties in Indiana. It was in force for 45 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 11, 2021, 11:15 AM CDT (16:15 UTC)
- Expired
- Aug 11, 2021, 12:00 PM CDT
- In force
- 45 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 102 km from the middle of the area, began a volume at 16:19 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 11, 11:16 AM CDT | TSTM WND DMG | 4 S Wheatfield, IN | 4 INCH DIAMETER TREE BRANCHES DOWNED. |
| Aug 11, 11:56 AM CDT | TSTM WND GST 55 | 4 Ese Valparaiso, IN | ASOS STATION KVPZ VALPARAISO AIRPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 11, 8:52 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 4.3 hours before the alert went out and 159 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1930 J/kg
- Mixed-layer CIN
- -174 J/kg
- Mixed-layer LCL
- 1253 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 228 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.4
The text
As transmitted.
507
WUUS53 KLOT 111615
SVRLOT
INC073-089-111-127-111700-
/O.NEW.KLOT.SV.W.0079.210811T1615Z-210811T1700Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Chicago/Romeoville
1115 AM CDT Wed Aug 11 2021
The National Weather Service in Chicago has issued a
* Severe Thunderstorm Warning for...
Newton County in northwestern Indiana...
Southern Porter County in northwestern Indiana...
Southern Lake County in northwestern Indiana...
Jasper County in northwestern Indiana...
* Until noon CDT.
* At 1114 AM CDT, severe thunderstorms were located along a line
extending from Crown Point to near Roselawn, moving east at 15
mph. Some of the strongest winds may be apart from the rain.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Merrillville, Valparaiso, Crown Point, Cedar Lake, Lowell,
Rensselaer, DeMotte, Hebron, Morocco, Wheatfield, Lake Village,
Lakes of the Four Seasons, Winfield, Roselawn, Kouts, Lake
Dalecarlia, Brook, Shelby, Hanging Grove and Collegeville.
Including the following interstate...
Indiana I-65 between mile markers 207 and 249.
This includes... Valparaiso University, Lake County Fairgrounds,
Porter County Fairgrounds, and US 41 Dragway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4091 8699 4084 8699 4083 8753 4138 8752
4150 8693 4091 8693
TIME...MOT...LOC 1614Z 269DEG 14KT 4145 8735 4109 8728
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
FRIEDLEIN4 follow-up statements
648
WWUS53 KLOT 111626
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1126 AM CDT Wed Aug 11 2021
INC073-089-111-127-111700-
/O.CON.KLOT.SV.W.0079.000000T0000Z-210811T1700Z/
Newton IN-Porter IN-Lake IN-Jasper IN-
1126 AM CDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR
NEWTON...SOUTHERN PORTER...SOUTHERN LAKE AND JASPER COUNTIES...
At 1125 AM CDT, severe thunderstorms were located along a line
extending from Lakes of the Four Seasons to near DeMotte, moving
east at 40 mph. Some of the strongest winds may be apart from the
rain. Valparaiso Airport gusted to 55 mph with these storms.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Merrillville, Valparaiso, Crown Point, Cedar Lake, Lowell,
Rensselaer, DeMotte, Hebron, Morocco, Wheatfield, Lake Village, Lakes
of the Four Seasons, Winfield, Roselawn, Kouts, Lake Dalecarlia,
Brook, Shelby, Hanging Grove and Collegeville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4091 8699 4084 8699 4083 8753 4138 8752
4150 8693 4091 8693
TIME...MOT...LOC 1625Z 258DEG 36KT 4139 8723 4111 8718
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
FRIEDLEIN122
WWUS53 KLOT 111635
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1135 AM CDT Wed Aug 11 2021
INC073-089-111-127-111700-
/O.CON.KLOT.SV.W.0079.000000T0000Z-210811T1700Z/
Newton IN-Porter IN-Lake IN-Jasper IN-
1135 AM CDT Wed Aug 11 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR
NORTHEASTERN NEWTON...SOUTHERN PORTER...SOUTHERN LAKE AND JASPER
COUNTIES...
At 1134 AM CDT, severe thunderstorms were located along a line
extending from near Hebron to near Medaryville, moving east at 35
mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Merrillville, Valparaiso, Crown Point, Cedar Lake, Lowell,
Rensselaer, DeMotte, Hebron, Wheatfield, Lake Village, Lakes of the
Four Seasons, Winfield, Roselawn, Kouts, Lake Dalecarlia, Shelby,
Hanging Grove, Schneider, Thayer and Stoutsburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4086 8699 4103 8738 4138 8752 4150 8693
4091 8693 4091 8699
TIME...MOT...LOC 1634Z 263DEG 32KT 4134 8728 4109 8700
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
FRIEDLEIN659 WWUS53 KLOT 111646 SVSLOT Severe Weather Statement National Weather Service Chicago/Romeoville 1146 AM CDT Wed Aug 11 2021 INC111-111656- /O.CAN.KLOT.SV.W.0079.000000T0000Z-210811T1700Z/ Newton IN- 1146 AM CDT Wed Aug 11 2021 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEWTON COUNTY IS CANCELLED... The storms which prompted the warning have moved out of the warned area. Therefore, the warning has been cancelled. A Severe Thunderstorm Watch remains in effect until 100 PM CDT for northwestern Indiana. LAT...LON 4150 8693 4091 8693 4105 8717 4141 8739 TIME...MOT...LOC 1646Z 269DEG 14KT 4134 8723 4109 8695 $$ INC073-089-127-111700- /O.CON.KLOT.SV.W.0079.000000T0000Z-210811T1700Z/ Porter IN-Lake IN-Jasper IN- 1146 AM CDT Wed Aug 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR SOUTHERN PORTER...SOUTHEASTERN LAKE AND NORTHERN JASPER COUNTIES... At 1146 AM CDT, severe thunderstorms were located along a line extending from Hebron to near Medaryville, moving east at 15 mph. Some of the strongest winds are apart from the storms. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Merrillville, Valparaiso, Crown Point, DeMotte, Hebron, Wheatfield, Lakes of the Four Seasons, Winfield, Kouts, Boone Grove, Baileys Corner, Stoutsburg, Dunns Bridge and Malden. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Prepare immediately for large hail and deadly cloud to ground lightning. Seek shelter inside a well-built structure. Stay away from windows. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4150 8693 4091 8693 4105 8717 4141 8739 TIME...MOT...LOC 1646Z 269DEG 14KT 4134 8723 4109 8695 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ FRIEDLEIN
864
WWUS53 KLOT 111656
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
1156 AM CDT Wed Aug 11 2021
INC073-089-127-111705-
/O.EXP.KLOT.SV.W.0079.000000T0000Z-210811T1700Z/
Porter IN-Lake IN-Jasper IN-
1156 AM CDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN PORTER...SOUTHEASTERN
LAKE AND NORTHERN JASPER COUNTIES WILL EXPIRE AT NOON CDT...
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 100 PM CDT for
northwestern Indiana.
LAT...LON 4150 8693 4091 8693 4105 8717 4141 8739
TIME...MOT...LOC 1655Z 269DEG 14KT 4134 8719 4109 8691
$$
FRIEDLEINThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 7:54 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 81 min |
| Aug 10, 8:20 PM CDT | Severe Thunderstorm Warning | LOT | Porter | 55 min |
| Aug 10, 9:22 PM CDT | Special Weather Statement | LOT | Newton | 53 min |
| Aug 10, 9:37 PM CDT | Severe Thunderstorm Warning | LOT | Jasper, Lake, Newton, Porter | 68 min |
| Aug 11, 1:59 AM CDT | Special Weather Statement | LOT | Newton | 46 min |
| Aug 11, 2:43 AM CDT | Special Weather Statement | LOT | Jasper | 62 min |
| Aug 11, 3:45 AM CDT | Special Weather Statement | LOT | Lake | 45 min |
| Aug 11, 4:06 AM CDT | Special Weather Statement | LOT | Porter | 39 min |
| Aug 11, 4:08 AM CDT | Severe Thunderstorm Warning | LOT | Porter | 36 min |
| Aug 11, 10:12 AM CDT | Severe Thunderstorm Warning | LOT | Lake, Porter | 63 min |
| Aug 11, 10:24 AM CDT | Special Weather Statement | LOT | Jasper, Newton | 66 min |
Nearby
Severe Thunderstorm Warnings in Indiana, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.