Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 32, NWS Chicago, IL
NWS Chicago, IL issued this tornado warning at Aug 9, 2021, 6:00 PM CDT for DeKalb County, Lee County, Illinois. It was in force for 26 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 9, 2021, 6:00 PM CDT (23:00 UTC)
- Expired
- Aug 9, 2021, 6:26 PM CDT
- In force
- 26 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties DeKalb County, IL, Lee County, IL
The radar
The Chicago radar (KLOT), 68 km from the middle of the area, began a volume at 22:59 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, 6:02 PM CDT | TORNADO | 1 Nw Paw Paw, IL | MULTIPLE REPORTS OF BRIEF TORNADO TOUCHDOWN. |
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, 11.0 hours before the alert went out and 133 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.
805
WFUS53 KLOT 092300
TORLOT
ILC037-103-092345-
/O.NEW.KLOT.TO.W.0032.210809T2300Z-210809T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Chicago/Romeoville
600 PM CDT Mon Aug 9 2021
The National Weather Service in Chicago has issued a
* Tornado Warning for...
East central Lee County in north central Illinois...
Southwestern De Kalb County in north central Illinois...
* Until 645 PM CDT.
* At 558 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Paw Paw, or 8 miles southwest of Shabbona, moving
east at 25 mph.
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 tornadic thunderstorm will remain over mainly rural areas of
east central Lee and southwestern De Kalb Counties including the
Rollo area.
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 4175 8900 4174 8874 4163 8874 4163 8901
TIME...MOT...LOC 2258Z 275DEG 20KT 4168 8900
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
LENNING3 follow-up statements
047
WWUS53 KLOT 092305
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
605 PM CDT Mon Aug 9 2021
ILC037-103-092345-
/O.CON.KLOT.TO.W.0032.000000T0000Z-210809T2345Z/
Lee IL-De Kalb IL-
605 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR EAST
CENTRAL LEE AND SOUTHWESTERN DE KALB COUNTIES...
At 604 PM CDT, a confirmed tornado was located over Paw Paw, or 7
miles southwest of Shabbona, moving east at 25 mph.
HAZARD...Damaging tornado.
SOURCE...Weather spotters and an off duty NWS forecaster confirmed a
tornado.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Paw Paw.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4175 8900 4174 8874 4163 8874 4163 8901
TIME...MOT...LOC 2304Z 275DEG 20KT 4168 8895
TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN
$$
LENNING683
WWUS53 KLOT 092320
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
620 PM CDT Mon Aug 9 2021
ILC103-092329-
/O.CAN.KLOT.TO.W.0032.000000T0000Z-210809T2345Z/
Lee IL-
620 PM CDT Mon Aug 9 2021
...THE TORNADO WARNING FOR EAST CENTRAL LEE COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1000 PM CDT for north central
Illinois.
LAT...LON 4171 8888 4170 8874 4163 8874 4163 8889
TIME...MOT...LOC 2319Z 275DEG 20KT 4167 8884
$$
ILC037-092345-
/O.CON.KLOT.TO.W.0032.000000T0000Z-210809T2345Z/
De Kalb IL-
620 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR SOUTH
CENTRAL DE KALB COUNTY...
At 619 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Leland, or near Shabbona, moving east at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
south central De Kalb County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4171 8888 4170 8874 4163 8874 4163 8889
TIME...MOT...LOC 2319Z 275DEG 20KT 4167 8884
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
LENNING259
WWUS53 KLOT 092326
SVSLOT
Severe Weather Statement
National Weather Service Chicago/Romeoville
626 PM CDT Mon Aug 9 2021
ILC037-092335-
/O.CAN.KLOT.TO.W.0032.000000T0000Z-210809T2345Z/
De Kalb IL-
626 PM CDT Mon Aug 9 2021
...THE TORNADO WARNING FOR SOUTH CENTRAL DE KALB COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled. Another warning remains in effect farther north in
DeKalb County until 630 PM CDT.
A Tornado Watch remains in effect until 1000 PM CDT for north central
Illinois.
LAT...LON 4171 8888 4170 8874 4163 8874 4163 8889
TIME...MOT...LOC 2323Z 275DEG 20KT 4167 8879
$$
LENNINGThe 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, 5:15 PM CDT | Tornado Warning | LOT | DeKalb, Kane | 60 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, 6:09 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.