Alert archive / Illinois / Tornado Warnings in 2018

Tornado Warning 49, NWS Quad Cities, IA

December 1, 2018McDonough County, Warren County, Illinois

NWS Quad Cities, IA issued this tornado warning at Dec 1, 2018, 4:00 PM CST for McDonough County, Warren County, Illinois. It was in force for 30 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: Dec 1, 2018, 4:00 PM CST (22:00 UTC)
Expired: Dec 1, 2018, 4:30 PM CST
In force: 30 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties McDonough County, IL, Warren County, IL

The radar

The Lincoln radar (KILX), 110 km from the middle of the area, began a volume at 21:59 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
Dec 1, 2:16 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.0 hours before the alert went out and 113 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.

801 
WFUS53 KDVN 012200
TORDVN
ILC109-187-012230-
/O.NEW.KDVN.TO.W.0049.181201T2200Z-181201T2230Z/

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

The National Weather Service in the Quad Cities has issued a

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

* Until 430 PM CST.
    
* At 359 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Bushnell, or 10 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...
  Prairie City around 415 PM CST.
  Avon around 425 PM CST.

Other locations impacted by this tornadic thunderstorm include
Prairie City Airport.

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.

This storm has a history of producing tornadoes.  For your safety,
seek shelter now!

&&

LAT...LON 4053 9047 4057 9058 4073 9049 4072 9044
      4056 9045
TIME...MOT...LOC 2159Z 219DEG 19KT 4056 9053 

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

$$

McClure

4 follow-up statements

351 
WWUS53 KDVN 012208
SVSDVN

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

ILC109-187-012230-
/O.CON.KDVN.TO.W.0049.000000T0000Z-181201T2230Z/
Warren IL-McDonough IL-
408 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CST FOR
SOUTHEASTERN WARREN AND NORTHEASTERN MCDONOUGH COUNTIES...
    
At 407 PM CST, a severe thunderstorm capable of producing a tornado
was located over Prairie City, or 13 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...
  Avon around 420 PM CST.

Other locations impacted by this tornadic thunderstorm include
Prairie City Airport.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4053 9047 4057 9058 4073 9049 4072 9044
      4056 9045
TIME...MOT...LOC 2207Z 219DEG 19KT 4060 9049 

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

$$

McClure

225 
WWUS53 KDVN 012217 CCA
SVSDVN

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

ILC109-187-012230-
/O.COR.KDVN.TO.W.0049.000000T0000Z-181201T2230Z/
Warren IL-McDonough IL-
417 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CST FOR
SOUTHEASTERN WARREN AND NORTHEASTERN MCDONOUGH COUNTIES...
    
At 415 PM CST, a severe thunderstorm capable of producing a tornado
was located over Prairie City, or 15 miles northeast of Macomb, 
moving northeast at 20 mph. A secondary area of rotation, which 
could produce a tornado, was located north of Bushnell. 

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...
  Avon around 425 PM CST.

Other locations impacted by this tornadic thunderstorm include
Prairie City Airport.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4053 9047 4057 9058 4073 9049 4072 9044
      4056 9045
TIME...MOT...LOC 2208Z 216DEG 18KT 4060 9049 

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

$$

McClure

824 
WWUS53 KDVN 012223
SVSDVN

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

ILC109-187-012230-
/O.CON.KDVN.TO.W.0049.000000T0000Z-181201T2230Z/
Warren IL-McDonough IL-
423 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 430 PM CST FOR
SOUTHEASTERN WARREN AND NORTHEASTERN MCDONOUGH COUNTIES...
    
At 423 PM CST, a severe thunderstorm capable of producing a tornado
was located over Avon, or 17 miles northeast of Macomb, moving north
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 tornadic thunderstorm will remain over mainly rural areas of
southeastern Warren and northeastern McDonough Counties, including
the following locations... Prairie City Airport.

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.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 4053 9047 4057 9058 4073 9049 4072 9044
      4056 9045
TIME...MOT...LOC 2223Z 201DEG 15KT 4068 9048 

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

$$

McClure

121 
WWUS53 KDVN 012226
SVSDVN

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

ILC109-187-012236-
/O.EXP.KDVN.TO.W.0049.000000T0000Z-181201T2230Z/
Warren IL-McDonough IL-
426 PM CST SAT DEC 1 2018

...THE TORNADO WARNING FOR SOUTHEASTERN WARREN AND NORTHEASTERN
MCDONOUGH COUNTIES WILL EXPIRE AT 430 PM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

A Tornado Watch remains in effect until 700 PM CST for west central
Illinois.

LAT...LON 4053 9047 4057 9058 4073 9049 4072 9044
      4056 9045
TIME...MOT...LOC 2226Z 216DEG 18KT 4069 9047 

$$

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, 3:42 PM CST	Tornado Warning	DVN	McDonough	33 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.