Alert archive / Illinois / Tornado Warnings in 2018

Tornado Warning 24, NWS Quad Cities, IA

August 28, 2018Carroll County, Illinois

NWS Quad Cities, IA issued this tornado warning at Aug 28, 2018, 7:53 PM CDT for Carroll County, Illinois. It was in force for 22 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 28, 2018, 7:53 PM CDT (00:53 UTC)
Expired: Aug 28, 2018, 8:15 PM CDT
In force: 22 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Carroll County, IL

The radar

The Quad Cities radar (KDVN), 68 km from the middle of the area, began a volume at 00:56 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 28, 5:06 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.9 hours before the alert went out and 63 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: 1340 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1112 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 172 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 10.4

Open this sounding in Storm Lab

The text

As transmitted.

750 
WFUS53 KDVN 290053
TORDVN
ILC015-290115-
/O.NEW.KDVN.TO.W.0024.180829T0053Z-180829T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
753 PM CDT TUE AUG 28 2018

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Southeastern Carroll County in northwestern Illinois...

* Until 815 PM CDT.
    
* At 753 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Fairhaven, or 9 miles north of Morrison, moving
  east at 45 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...
  Milledgeville around 805 PM CDT.

Other locations impacted by this tornadic thunderstorm include Ideal,
Carroll County Fairgrounds and Hitt.

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 4193 9005 4198 9007 4208 8969 4193 8969
TIME...MOT...LOC 0053Z 263DEG 41KT 4195 8998 

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

$$

McClure

2 follow-up statements

995 
WWUS53 KDVN 290100
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
800 PM CDT TUE AUG 28 2018

ILC015-290115-
/O.CON.KDVN.TO.W.0024.000000T0000Z-180829T0115Z/
Carroll IL-
800 PM CDT TUE AUG 28 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHEASTERN CARROLL COUNTY...
    
At 759 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Fairhaven, or 10 miles southeast of Mount Carroll,
moving east at 45 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...
  Milledgeville around 810 PM CDT.

Other locations impacted by this tornadic thunderstorm include Ideal,
Carroll County Fairgrounds and Hitt.

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!

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 4193 9005 4198 9007 4208 8969 4193 8969
TIME...MOT...LOC 0059Z 263DEG 38KT 4196 8990 

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

$$

McClure

988 
WWUS53 KDVN 290115
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
815 PM CDT TUE AUG 28 2018

ILC015-290125-
/O.EXP.KDVN.TO.W.0024.000000T0000Z-180829T0115Z/
Carroll IL-
815 PM CDT TUE AUG 28 2018

...THE TORNADO WARNING FOR SOUTHEASTERN CARROLL COUNTY HAS EXPIRED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.  However
gusty winds and heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
northwestern 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 4193 9005 4198 9007 4208 8969 4193 8969
TIME...MOT...LOC 0115Z 263DEG 41KT 4198 8967 

$$

Gibbs

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 7:00 PM CDT	Severe Thunderstorm Warning	DVN	Carroll, Jo Daviess, Whiteside	60 min
Aug 28, 7:38 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Carroll, Henry, Whiteside	52 min
Aug 28, 8:50 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	40 min
Aug 28, 9:10 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Mercer	65 min
Aug 29, 1:26 AM CDT	Special Weather Statement	DVN	McDonough	49 min
Aug 29, 2:21 AM CDT	Special Weather Statement	DVN	Hancock	39 min

Nearby

Tornado Warnings in Illinois, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.