Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 28, NWS Quad Cities, IA

October 11, 2021Bureau County, Putnam County, Illinois

NWS Quad Cities, IA issued this tornado warning at Oct 11, 2021, 5:58 PM CDT for Bureau County, Putnam County, Illinois. It was in force for 47 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: Oct 11, 2021, 5:58 PM CDT (22:58 UTC)
Expired: Oct 11, 2021, 6:45 PM CDT
In force: 47 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Bureau County, IL, Putnam County, IL

The radar

The Chicago radar (KLOT), 105 km from the middle of the area, began a volume at 22:58 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
Oct 11, 3:10 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.0 hours before the alert went out and 109 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 798 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

553 
WFUS53 KDVN 112258
TORDVN
ILC011-155-112345-
/O.NEW.KDVN.TO.W.0028.211011T2258Z-211011T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
558 PM CDT Mon Oct 11 2021

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Central Putnam County in north central Illinois...
  Eastern Bureau County in north central Illinois...

* Until 645 PM CDT.
    
* At 558 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Hennepin, moving northeast at 35 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...
  DePue around 610 PM CDT.
  Spring Valley and Dalzell around 615 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Ladd.

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 4114 8930 4120 8942 4151 8929 4148 8916
      4124 8916
TIME...MOT...LOC 2258Z 205DEG 31KT 4124 8932 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Gibbs

2 follow-up statements

405 
WWUS53 KDVN 112313
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
613 PM CDT Mon Oct 11 2021

ILC011-155-112345-
/O.CON.KDVN.TO.W.0028.000000T0000Z-211011T2345Z/
Putnam IL-Bureau IL-
613 PM CDT Mon Oct 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN PUTNAM AND NORTHEASTERN BUREAU COUNTIES...
    
At 613 PM CDT, a severe thunderstorm capable of producing a tornado
was located over DePue, or near Hennepin, moving northeast at 35 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...
  Dalzell and Ladd.

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 4121 8926 4126 8939 4151 8929 4148 8916
      4131 8916
TIME...MOT...LOC 2313Z 203DEG 30KT 4131 8928 

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

$$

Gibbs

507 
WWUS53 KDVN 112332
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
632 PM CDT Mon Oct 11 2021

ILC011-155-112345-
/O.CON.KDVN.TO.W.0028.000000T0000Z-211011T2345Z/
Putnam IL-Bureau IL-
632 PM CDT Mon Oct 11 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
NORTHEASTERN PUTNAM AND NORTHEASTERN BUREAU COUNTIES...
    
At 632 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Ladd, or near Peru, moving northeast at 35 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 Putnam and northeastern Bureau Counties, including the
following locations... Seatonville, Ottville, Spring Valley Airport,
Cherry, Hollowayville 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 4129 8918 4135 8935 4151 8929 4148 8916
      4131 8916
TIME...MOT...LOC 2332Z 203DEG 30KT 4143 8913 

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
Oct 11, 6:38 AM CDT	Special Weather Statement	DVN	McDonough	37 min
Oct 11, 10:55 AM CDT	Special Weather Statement	DVN	Hancock	50 min
Oct 11, 11:26 AM CDT	Special Weather Statement	DVN	Hancock	49 min
Oct 11, 12:55 PM CDT	Special Weather Statement	DVN	Hancock	50 min
Oct 11, 3:01 PM CDT	Special Weather Statement	DVN	Mercer, Warren	44 min
Oct 11, 5:12 PM CDT	Tornado Warning	DVN	Putnam	48 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.