Alert archive / Illinois / Tornado Warnings in 2018

Tornado Warning 48, NWS Quad Cities, IA

December 1, 2018McDonough County, Illinois

NWS Quad Cities, IA issued this tornado warning at Dec 1, 2018, 3:42 PM CST for McDonough County, Illinois. It was in force for 33 min. 1 report 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: Dec 1, 2018, 3:42 PM CST (21:42 UTC)
Expired: Dec 1, 2018, 4:15 PM CST
In force: 33 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County McDonough County, IL

The radar

The Lincoln radar (KILX), 112 km from the middle of the area, began a volume at 21:43 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
Dec 1, 3:42 PM CST	TORNADO	2 Sw Bardolph, IL	MEDIA RELAYED A SPOTTER REPORT OF A BRIEF TORNADO TOUCH DOWN. TIME AND LOCATION OF THE EVENT WAS ESTIMATED USING RADAR.

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
Dec 1, 2:16 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.7 hours before the alert went out and 124 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: 809 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 269 m²/s²
0-3 km storm-relative helicity: 328 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

670 
WFUS53 KDVN 012142
TORDVN
ILC109-012215-
/O.NEW.KDVN.TO.W.0048.181201T2142Z-181201T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
342 PM CST SAT DEC 1 2018

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northeastern McDonough County in west central Illinois...

* Until 415 PM CST.
    
* At 341 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Bardolph, or near Macomb, moving northeast at 20
  mph.

  HAZARD...Tornado and quarter size hail.

  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...
  Bardolph around 350 PM CST.
  Bushnell around 405 PM CST.

Other locations impacted by this tornadic thunderstorm include
Scottsburg.

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 4045 9069 4059 9059 4056 9047 4056 9045
      4042 9056
TIME...MOT...LOC 2141Z 223DEG 19KT 4048 9060 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

McClure

2 follow-up statements

621 
WWUS53 KDVN 012151
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
351 PM CST SAT DEC 1 2018

ILC109-012215-
/O.CON.KDVN.TO.W.0048.000000T0000Z-181201T2215Z/
McDonough IL-
351 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CST FOR
NORTHEASTERN MCDONOUGH COUNTY...
    
At 349 PM CST, a severe thunderstorm capable of producing a tornado
was located over Bardolph, or near Macomb, moving northeast at 20
mph. At 342 PM CST, media relayed a report of a brief tornado touch 
down just south of Bardoph. 

HAZARD...Tornado and quarter size hail.

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...
  Bushnell around 405 PM CST.

Other locations impacted by this tornadic thunderstorm include
Scottsburg.

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 4045 9069 4059 9059 4056 9047 4056 9045
      4042 9056
TIME...MOT...LOC 2149Z 223DEG 19KT 4051 9056 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

McClure

270 
WWUS53 KDVN 012204
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
404 PM CST SAT DEC 1 2018

ILC109-012215-
/O.CON.KDVN.TO.W.0048.000000T0000Z-181201T2215Z/
McDonough IL-
404 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CST FOR
NORTHEASTERN MCDONOUGH COUNTY...
    
At 404 PM CST, a severe thunderstorm capable of producing a tornado
was located over Bardolph, or 7 miles northeast of Macomb, moving
northeast at 20 mph.

HAZARD...Tornado and quarter size hail.

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...
  Bushnell around 415 PM CST.

Other locations impacted by this tornadic thunderstorm include
Scottsburg.

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 4050 9065 4059 9059 4056 9047 4056 9045
      4046 9053
TIME...MOT...LOC 2204Z 206DEG 17KT 4051 9056 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

McClure

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 1, 7:28 AM CST	Wind Advisory	DVN	Carroll, Henry, Jo Daviess, Mercer, Rock Island, Stephenson and 1 more	7 hr
Dec 1, 12:36 PM CST	Dense Fog Advisory	DVN	Bureau, Hancock, Henderson, Henry, McDonough, Mercer and 4 more	20 hr
Dec 1, 3:03 PM CST	Special Weather Statement	DVN	Henderson	27 min
Dec 1, 3:05 PM CST	Tornado Warning	DVN	McDonough	25 min
Dec 1, 3:24 PM CST	Special Weather Statement	DVN	Henderson	36 min
Dec 1, 3:40 PM CST	Severe Thunderstorm Warning	DVN	McDonough	35 min
Dec 1, 4:00 PM CST	Tornado Warning	DVN	McDonough, Warren	30 min
Dec 1, 4:40 PM CST	Special Weather Statement	DVN	Henry	35 min
Dec 1, 5:12 PM CST	Special Weather Statement	DVN	Henry	33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.