Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 21, NWS Quad Cities, IA

August 9, 2021Bureau County, Illinois

NWS Quad Cities, IA issued this tornado warning at Aug 9, 2021, 7:12 PM CDT for Bureau County, Illinois. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 9, 2021, 7:12 PM CDT (00:12 UTC)
Expired: Aug 9, 2021, 8:00 PM CDT
In force: 48 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Observed
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 00:13 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
Aug 9, 2:43 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.2 hours before the alert went out and 102 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2409 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

009 
WFUS53 KDVN 100012
TORDVN
ILC011-100100-
/O.NEW.KDVN.TO.W.0021.210810T0012Z-210810T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
712 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 800 PM CDT.

* At 711 PM CDT, a confirmed tornado was located near La Moille, or 8
  miles northeast of Princeton, moving east at 25 mph.

  HAZARD...Damaging tornado.

  SOURCE...Weather spotters 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.

* The tornado will be near...
  Ladd around 730 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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4143 8939 4150 8939 4151 8917 4137 8917
TIME...MOT...LOC 0011Z 284DEG 21KT 4146 8933 

TORNADO...OBSERVED
MAX HAIL SIZE...0.00 IN

$$

Gibbs

3 follow-up statements

153 
WWUS53 KDVN 100017
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
717 PM CDT Mon Aug 9 2021

ILC011-100100-
/O.CON.KDVN.TO.W.0021.000000T0000Z-210810T0100Z/
Bureau IL-
717 PM CDT Mon Aug 9 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
    
At 717 PM CDT, a severe thunderstorm capable of producing a tornado
was located near La Moille, or 10 miles northeast of Princeton,
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 dangerous storm will be near...
  Ladd around 730 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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4143 8939 4150 8939 4151 8917 4137 8917
TIME...MOT...LOC 0017Z 284DEG 21KT 4145 8928 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Gibbs

500 
WWUS53 KDVN 100024
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
724 PM CDT Mon Aug 9 2021

ILC011-100100-
/O.CON.KDVN.TO.W.0021.000000T0000Z-210810T0100Z/
Bureau IL-
724 PM CDT Mon Aug 9 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR
NORTHEASTERN BUREAU COUNTY...
    
At 724 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Ladd, or 9 miles northwest of Peru, 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 dangerous storm will be near...
  Ladd around 735 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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 4142 8935 4150 8934 4151 8917 4137 8917
TIME...MOT...LOC 0024Z 289DEG 17KT 4144 8926 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Gibbs

629 
WWUS53 KDVN 100037
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
737 PM CDT Mon Aug 9 2021

ILC011-100100-
/O.CON.KDVN.TO.W.0021.000000T0000Z-210810T0100Z/
Bureau IL-
737 PM CDT Mon Aug 9 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR EASTERN
BUREAU COUNTY...
        
At 737 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Ladd, or near Peru, moving east at 25 mph.

HAZARD...Tornado.

SOURCE...Weather spotters reported a funnel cloud east of Zearing at 
         723 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 tornadic thunderstorm will remain over mainly rural areas of
eastern Bureau County, including the following locations... Cherry
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 4141 8931 4146 8929 4149 8917 4137 8917
TIME...MOT...LOC 0037Z 284DEG 21KT 4142 8916 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

Gibbs

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 7:30 PM CDT	Tornado Warning Tornado observed	DVN	Bureau	45 min
Aug 9, 8:02 PM CDT	Flash Flood Warning	DVN	Bureau	2 hr
Aug 9, 8:16 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	29 min
Aug 9, 9:39 PM CDT	Special Weather Statement	DVN	Henry	36 min
Aug 9, 9:54 PM CDT	Special Weather Statement	DVN	Henry	51 min
Aug 9, 10:44 PM CDT	Special Weather Statement	DVN	Mercer	31 min
Aug 10, 2:28 PM CDT	Heat Advisory	DVN	Bureau, Carroll, Hancock, Henderson, Henry, Jo Daviess and 7 more	29 hr
Aug 10, 4:04 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	56 min
Aug 10, 5:00 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Jo Daviess, Whiteside	45 min
Aug 10, 5:24 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Jo Daviess, Stephenson, Whiteside	51 min
Aug 10, 5:47 PM CDT	Special Weather Statement	DVN	Bureau	13 min
Aug 10, 5:47 PM CDT	Special Weather Statement	DVN	Bureau	13 min
Aug 10, 5:49 PM CDT	Severe Thunderstorm Warning	DVN	Stephenson	41 min
Aug 10, 6:16 PM CDT	Severe Thunderstorm Warning	DVN	Stephenson	13 min
Aug 10, 6:50 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	25 min
Aug 10, 6:53 PM CDT	Special Weather Statement	DVN	Mercer, Warren	37 min

Nearby

Tornado Warnings in Illinois, 2021 Every tornado warning in 2021 Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.