Alert archive / Illinois / Tornado Warnings in 2021
Tornado Warning 20, NWS Quad Cities, IA
NWS Quad Cities, IA issued this tornado warning at Aug 9, 2021, 6:50 PM CDT for Bureau County, Illinois. It was in force for 25 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, 6:50 PM CDT (23:50 UTC)
- Expired
- Aug 9, 2021, 7:15 PM CDT
- In force
- 25 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
County Bureau County, IL
The radar
The Chicago radar (KLOT), 103 km from the middle of the area, began a volume at 23:52 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, 6:57 PM CDT | TORNADO | 1 Ne Zearing, IL | EF1 TORNADO BEGAN IN A CORN FIELD CAUSING DAMAGE TO CROPS. AS IT MOVED TO THE EAST THE TORNADO CAUSED DAMAGE TO FOUR FARMSTEADS. EF1 DAMAGE WAS FOUND AT THE FIRST AND SECOND FARMSTEAD WHERE TREES WERE SNAPPED AND THREE SHEDS WERE COMPLETELY DESTROYED. ANOTHER |
| Aug 9, 7:09 PM CDT | TORNADO | 1 W Arlington, IL | RAIN WRAPPED TORNADO. |
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, 11.8 hours before the alert went out and 101 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.
661
WFUS53 KDVN 092350
TORDVN
ILC011-100015-
/O.NEW.KDVN.TO.W.0020.210809T2350Z-210810T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
650 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 715 PM CDT.
* At 650 PM CDT, a severe thunderstorm capable of producing a tornado
was located near La Moille, or 10 miles northeast of Princeton,
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 tornadic thunderstorm will remain over mainly rural areas of
northeastern Bureau County, including the following locations...
Cherry, Zearing and Arlington.
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.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 4145 8940 4153 8939 4154 8917 4139 8917
TIME...MOT...LOC 2350Z 279DEG 25KT 4148 8931
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
Gibbs1 follow-up statement
904
WWUS53 KDVN 100001
SVSDVN
Severe Weather Statement
National Weather Service Quad Cities IA/IL
701 PM CDT Mon Aug 9 2021
ILC011-100015-
/O.CON.KDVN.TO.W.0020.000000T0000Z-210810T0015Z/
Bureau IL-
701 PM CDT Mon Aug 9 2021
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
At 701 PM CDT, a severe thunderstorm capable of producing a tornado
was located near La Moille, or 9 miles southwest of Mendota, moving
east at 15 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Arlington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
&&
LAT...LON 4147 8935 4150 8935 4152 8917 4143 8917
TIME...MOT...LOC 0001Z 275DEG 13KT 4148 8928
TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN
$$
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, 5:55 PM CDT | Tornado Warning | DVN | Bureau | 50 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.