Alert archive / Illinois / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 73, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jun 30, 2019, 1:13 PM CDT for 8 counties in Illinois. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 30, 2019, 1:13 PM CDT (18:13 UTC)
- Expired
- Jun 30, 2019, 2:00 PM CDT
- In force
- 47 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Boone County, IL, DeKalb County, IL, Kane County, IL, Kendall County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL
The radar
The Chicago radar (KLOT), 78 km from the middle of the area, began a volume at 18:12 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 30, 11:43 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 6.2 hours before the alert went out and 145 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
- 1910 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1304 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 9:50 PM CDT | Special Weather Statement | LOT | Iroquois | 25 min |
| Jun 30, 12:07 PM CDT | Special Marine Warning | LOT | 3 hr | |
| Jun 30, 12:21 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Lake, McHenry | 54 min |
| Jun 30, 12:29 PM CDT | Special Weather Statement | LOT | Winnebago | 61 min |
| Jun 30, 1:02 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Lake, McHenry | 73 min |
| Jun 30, 1:46 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Will | 44 min |
| Jun 30, 2:02 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Grundy, Kane, Kendall, LaSalle, Lee and 1 more | 43 min |
| Jun 30, 2:13 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kankakee, Will | 77 min |
| Jun 30, 2:18 PM CDT | Areal Flood Advisory | LOT | Kendall | 4 hr |
| Jun 30, 2:25 PM CDT | Special Marine Warning | LOT | 2 hr | |
| Jun 30, 2:28 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, LaSalle, Livingston | 51 min |
| Jun 30, 2:31 PM CDT | Areal Flood Advisory | LOT | Grundy, Will | 4 hr |
| Jun 30, 2:43 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Livingston | 62 min |
| Jun 30, 2:54 PM CDT | Areal Flood Advisory | LOT | Kankakee, Will | 3 hr |
| Jun 30, 3:01 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Kankakee | 44 min |
| Jun 30, 3:21 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 54 min |
| Jun 30, 3:43 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 32 min |
| Jun 30, 4:24 PM CDT | Areal Flood Advisory | LOT | Ford, Iroquois | 3 hr |
| Jun 30, 3:04 PM CDT | Severe Thunderstorm Warning | LOT | Jasper, Lake, Newton | 71 min |
| Jun 30, 3:49 PM CDT | Severe Thunderstorm Warning | LOT | Benton | 56 min |
| Jun 30, 4:12 PM CDT | Severe Thunderstorm Warning | LOT | Jasper, Newton | 33 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2019Every severe thunderstorm warning in 2019
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.