Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 29, NWS Chicago, IL
NWS Chicago, IL issued this tornado warning at Aug 9, 2021, 5:15 PM CDT for DeKalb County, Kane County, Illinois. It was in force for 60 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 9, 2021, 5:15 PM CDT (22:15 UTC)
- Expired
- Aug 9, 2021, 6:15 PM CDT
- In force
- 60 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties DeKalb County, IL, Kane County, IL
The radar
The Chicago radar (KLOT), 68 km from the middle of the area, began a volume at 22:17 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 9, 5:26 PM CDT | TSTM WND DMG | 2 Wsw Burlington, IL | KANE COUNTY SHERIFFS OFFICE REPORTS DAMAGE TO A STRUCTURE ALONG PLANK ROAD NEAR EAGLE ROAD. POSSIBLE TORNADO. TIME ESTIMATED BY RADAR. |
| Aug 9, 5:26 PM CDT | TORNADO | 2 Wsw Burlington, IL | CORRECTS AND UPDATES PREVIOUS TSTM WND DMG REPORT FROM 2 WSW BURLINGTON. KANE COUNTY SHERIFFS OFFICE REPORTS DAMAGE TO A STRUCTURE ALONG PLANK ROAD NEAR EAGLE ROAD. CONFIRMED TORNADO WITH THIS DAMAGE GIVEN TORNADO DEBRIS SIGNATURE ON KLOT FROM ABOUT 5:24 PM UN |
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 9, 2:43 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.3 hours before the alert went out and 161 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
- 1676 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 705 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.7
The text
As transmitted.
044
WFUS53 KLOT 092215
TORLOT
ILC037-089-092315-
/O.NEW.KLOT.TO.W.0029.210809T2215Z-210809T2315Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Chicago/Romeoville
515 PM CDT Mon Aug 9 2021
The National Weather Service in Chicago has issued a
* Tornado Warning for...
Northeastern De Kalb County in north central Illinois...
Northwestern Kane County in northeastern Illinois...
* Until 615 PM CDT.
* At 515 PM CDT, a severe thunderstorm capable of producing a
tornado was located over Kingston, or near Genoa, moving east at
20 mph. Another storm capable of producing a tornado was 3 miles
south of Genoa. These storms have a history of producing tornadoes.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Sycamore and Genoa around 530 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Hampshire, Lily Lake and Pingree Grove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4204 8878 4213 8877 4212 8844 4193 8846
TIME...MOT...LOC 2215Z 273DEG 16KT 4207 8878
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Carlaw2 follow-up statements
397
WWUS53 KLOT 092228
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
528 PM CDT Mon Aug 9 2021
ILC037-089-092315-
/O.CON.KLOT.TO.W.0029.000000T0000Z-210809T2315Z/
De Kalb IL-Kane IL-
528 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
NORTHEASTERN DE KALB AND NORTHWESTERN KANE COUNTIES...
At 528 PM CDT, a confirmed tornado was located near Hampshire, or 7
miles southeast of Genoa or due west of Burlington, moving east at
20 mph. An additional storm capable of producing a tornado was
located 3 miles south of Genoa.
HAZARD...Damaging tornado.
SOURCE...Radar confirmed tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Lily Lake and Pingree Grove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4204 8878 4213 8877 4212 8844 4193 8846
TIME...MOT...LOC 2228Z 276DEG 17KT 4205 8857
TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN
$$
Carlaw293
WWUS53 KLOT 092251
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
551 PM CDT Mon Aug 9 2021
ILC037-089-092315-
/O.CON.KLOT.TO.W.0029.000000T0000Z-210809T2315Z/
De Kalb IL-Kane IL-
551 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CDT FOR
NORTHEASTERN DE KALB AND NORTHWESTERN KANE COUNTIES...
At 550 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Lily Lake, or 7 miles northwest of Campton Hills,
moving southeast at 15 mph. An additional storm capable of producing
a tornado is located near Genoa.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Sycamore, Genoa, Pingree Grove, Hampshire, Kingston, Lily Lake,
Burlington and Virgil.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4204 8878 4213 8877 4212 8844 4193 8846
TIME...MOT...LOC 2250Z 294DEG 15KT 4201 8855
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
CarlawThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:52 AM CDT | Special Weather Statement | LOT | Winnebago | 23 min |
| Aug 9, 11:49 AM CDT | Areal Flood Advisory | LOT | Boone, DeKalb, Kane, McHenry, Ogle, Winnebago | 3 hr |
| Aug 9, 2:46 PM CDT | Heat Advisory | LOT | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 28 hr |
| Aug 9, 3:14 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Ogle, Winnebago | 61 min |
| Aug 9, 3:25 PM CDT | Areal Flood Advisory | LOT | Boone, Winnebago | 3 hr |
| Aug 9, 3:46 PM CDT | Tornado Warning | LOT | Boone, Winnebago | 26 min |
| Aug 9, 4:12 PM CDT | Areal Flood Advisory | LOT | Boone, McHenry | 3 hr |
| Aug 9, 4:34 PM CDT | Tornado Warning | LOT | DeKalb | 41 min |
| Aug 9, 4:39 PM CDT | Tornado Warning | LOT | DeKalb, Ogle | 51 min |
| Aug 9, 5:11 PM CDT | Tornado Warning | LOT | Lee | 49 min |
| Aug 9, 5:32 PM CDT | Tornado Warning | LOT | DeKalb, Ogle | 43 min |
| Aug 9, 5:42 PM CDT | Tornado Warning | LOT | Kane | 48 min |
| Aug 9, 6:00 PM CDT | Tornado Warning | LOT | DeKalb, Lee | 26 min |
| Aug 9, 6:09 PM CDT | Tornado Warning | LOT | DeKalb, Kane | 51 min |
| Aug 9, 6:24 PM CDT | Tornado Warning | LOT | DuPage, Kane | 66 min |
| Aug 9, 6:45 PM CDT | Special Marine Warning | LOT | 90 min | |
| Aug 9, 6:50 PM CDT | Tornado Warning | LOT | Kane | 40 min |
Nearby
Tornado Warnings in Illinois, 2021Every tornado warning in 2021Tornadoes 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.