Alert archive / Indiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 69, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Aug 11, 2021, 4:08 AM CDT for Porter County, Indiana. It was in force for 36 min. 1 report 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, 4:08 AM CDT (09:08 UTC)
- Expired
- Aug 11, 2021, 4:44 AM CDT
- In force
- 36 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Porter County, IN
The radar
The Chicago radar (KLOT), 85 km from the middle of the area, began a volume at 09:10 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, 4:31 AM CDT | TSTM WND GST 52 | 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 nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 9.1 hours before the alert went out and 188 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
- 2608 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1127 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
633 WUUS53 KLOT 110908 SVRLOT INC127-111000- /O.NEW.KLOT.SV.W.0069.210811T0908Z-210811T1000Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Chicago/Romeoville 408 AM CDT Wed Aug 11 2021 The National Weather Service in Chicago has issued a * Severe Thunderstorm Warning for... Central Porter County in northwestern Indiana... * Until 500 AM CDT. * At 408 AM CDT, a severe thunderstorm was located near Lakes of the Four Seasons, or near Hebron, moving northeast at 25 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Valparaiso, Hebron, Lakes of the Four Seasons, Malden and Boone Grove. Including the following interstate... Indiana I-90 between mile markers 33 and 37. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4130 8722 4145 8722 4163 8693 4135 8693 TIME...MOT...LOC 0908Z 231DEG 22KT 4138 8713 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Kluber
3 follow-up statements
708 WWUS53 KLOT 110922 SVSLOT Severe Weather Statement National Weather Service Chicago/Romeoville 422 AM CDT Wed Aug 11 2021 INC127-111000- /O.CON.KLOT.SV.W.0069.000000T0000Z-210811T1000Z/ Porter IN- 422 AM CDT Wed Aug 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR CENTRAL PORTER COUNTY... At 421 AM CDT, a severe thunderstorm was located 5 miles southwest of Valparaiso, moving east-northeast at 35 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Valparaiso, Hebron, Malden and Boone Grove. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4130 8722 4145 8722 4163 8693 4135 8693 TIME...MOT...LOC 0921Z 251DEG 29KT 4145 8704 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Kluber
297 WWUS53 KLOT 110933 SVSLOT Severe Weather Statement National Weather Service Chicago/Romeoville 433 AM CDT Wed Aug 11 2021 INC127-111000- /O.CON.KLOT.SV.W.0069.000000T0000Z-210811T1000Z/ Porter IN- 433 AM CDT Wed Aug 11 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR SOUTHEASTERN PORTER COUNTY... At 432 AM CDT, a severe thunderstorm was located near Wanatah, or near Valparaiso, moving east at 30 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Malden. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4132 8708 4154 8707 4163 8693 4135 8693 TIME...MOT...LOC 0932Z 256DEG 24KT 4147 8696 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Kluber
394
WWUS53 KLOT 110944
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
444 AM CDT Wed Aug 11 2021
INC127-110954-
/O.CAN.KLOT.SV.W.0069.000000T0000Z-210811T1000Z/
Porter IN-
444 AM CDT Wed Aug 11 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN PORTER COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
LAT...LON 4132 8708 4154 8707 4163 8693 4135 8693
TIME...MOT...LOC 0942Z 231DEG 22KT 4152 8688
$$
KluberThe 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, 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 |
| Aug 11, 11:15 AM CDT | Severe Thunderstorm Warning | LOT | Jasper, Lake, Newton, Porter | 45 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.