Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 19, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Aug 9, 2021, 5:55 PM CDT for Bureau County, Illinois. It was in force for 50 min. 3 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, 5:55 PM CDT (22:55 UTC)
- Expired
- Aug 9, 2021, 6:45 PM CDT
- In force
- 50 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Bureau County, IL
The radar
The Chicago radar (KLOT), 103 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, 6:03 PM CDT | FUNNEL CLOUD | 2 E Ohio, IL | DEFINITE ROTATION. |
| Aug 9, 6:06 PM CDT | TORNADO | 3 W Van Orin, IL | BRIEF TOUCHDOWN THEN CAME RIGHT BACK UP. |
| Aug 9, 6:13 PM CDT | TORNADO | 1 Sse Van Orin, IL | BRIEF TOUCHDOWN IN A FIELD WITH NO VISIBLE DAMAGE. |
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, 10.9 hours before the alert went out and 99 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.
101
WFUS53 KDVN 092255
TORDVN
ILC011-092345-
/O.NEW.KDVN.TO.W.0019.210809T2255Z-210809T2345Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
555 PM CDT Mon Aug 9 2021
The National Weather Service in the Quad Cities has issued a
* Tornado Warning for...
Northeastern Bureau County in north central Illinois...
* Until 645 PM CDT.
* At 555 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles east of Walnut, or 11 miles south of Walton,
moving east at 30 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 dangerous storm will be near...
La Moille around 615 PM CDT.
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 4145 8917 4153 8953 4158 8953 4159 8917
TIME...MOT...LOC 2255Z 279DEG 25KT 4155 8944
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Gibbs6 follow-up statements
424
WWUS53 KDVN 092301
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
601 PM CDT Mon Aug 9 2021
ILC011-092345-
/O.CON.KDVN.TO.W.0019.000000T0000Z-210809T2345Z/
Bureau IL-
601 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
At 601 PM CDT, a severe thunderstorm capable of producing a tornado
was located near La Moille, or 11 miles south of Walton, moving east
at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
La Moille.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4145 8917 4152 8947 4158 8947 4159 8917
TIME...MOT...LOC 2301Z 279DEG 20KT 4155 8941
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Gibbs039
WWUS53 KDVN 092307
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
607 PM CDT Mon Aug 9 2021
ILC011-092345-
/O.CON.KDVN.TO.W.0019.000000T0000Z-210809T2345Z/
Bureau IL-
607 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
At 606 PM CDT, a severe thunderstorm capable of producing a tornado
was located near La Moille, or 12 miles northeast of Princeton,
moving east at 25 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud.
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...
La Moille around 620 PM CDT.
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 4145 8917 4152 8947 4158 8947 4159 8917
TIME...MOT...LOC 2306Z 279DEG 20KT 4154 8937
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Gibbs344
WWUS53 KDVN 092310
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
610 PM CDT Mon Aug 9 2021
ILC011-092345-
/O.CON.KDVN.TO.W.0019.000000T0000Z-210809T2345Z/
Bureau IL-
610 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
At 609 PM CDT, a confirmed tornado was located near La Moille, or 12
miles west of Mendota, moving east at 25 mph.
HAZARD...Damaging tornado.
SOURCE...Weather spotters confirmed tornado. A brief tornado
touchdown was reported east of Ohio at 606 PM cdt.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornado will be near...
La Moille around 620 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.
&&
LAT...LON 4145 8917 4152 8947 4158 8947 4159 8917
TIME...MOT...LOC 2309Z 279DEG 20KT 4154 8936
TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN
$$
Gibbs052
WWUS53 KDVN 092318
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
618 PM CDT Mon Aug 9 2021
ILC011-092345-
/O.CON.KDVN.TO.W.0019.000000T0000Z-210809T2345Z/
Bureau IL-
618 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
At 617 PM CDT, a severe thunderstorm capable of producing a tornado
was located over La Moille, or 10 miles west of Mendota, moving east
at 20 mph. A second tornadic circulation was located just over Ohio.
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...
La Moille around 625 PM CDT.
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.
This storm has a history of producing tornadoes. Seek shelter now!
&&
LAT...LON 4145 8917 4152 8947 4158 8947 4159 8917
TIME...MOT...LOC 2317Z 276DEG 18KT 4154 8931
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Gibbs325
WWUS53 KDVN 092331
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
631 PM CDT Mon Aug 9 2021
ILC011-092345-
/O.CON.KDVN.TO.W.0019.000000T0000Z-210809T2345Z/
Bureau IL-
631 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
At 631 PM CDT, a severe thunderstorm capable of producing a tornado
was located near La Moille, or near Mendota, moving east at 20 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
northeastern Bureau County, including the following locations...
Ohio, Arlington and Van Orin.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This storm has a history of producing tornadoes. Seek shelter now!
&&
LAT...LON 4145 8917 4152 8947 4158 8947 4159 8917
TIME...MOT...LOC 2331Z 276DEG 18KT 4153 8922
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Gibbs518
WWUS53 KDVN 092342
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
642 PM CDT Mon Aug 9 2021
ILC011-092352-
/O.EXP.KDVN.TO.W.0019.000000T0000Z-210809T2345Z/
Bureau IL-
642 PM CDT Mon Aug 9 2021
...THE TORNADO WARNING FOR NORTHEASTERN BUREAU COUNTY WILL EXPIRE AT
645 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
A Tornado Watch remains in effect until 1000 PM CDT for north central
Illinois.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
the Quad Cities.
LAT...LON 4145 8917 4152 8947 4158 8947 4159 8917
TIME...MOT...LOC 2342Z 279DEG 25KT 4152 8913
$$
GibbsThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 4:59 AM CDT | Special Weather Statement | DVN | Stephenson | 31 min |
| Aug 9, 7:08 AM CDT | Special Weather Statement | DVN | Stephenson | 22 min |
| Aug 9, 7:38 AM CDT | Special Weather Statement | DVN | Stephenson | 22 min |
| Aug 9, 6:50 PM CDT | Tornado Warning | DVN | Bureau | 25 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.