Alert archive / Illinois / Tornado Warnings in 2020

Tornado Warning 21, NWS Lincoln, IL

November 10, 2020Marshall County, Illinois

NWS Lincoln, IL issued this tornado warning at Nov 10, 2020, 3:45 PM CST for Marshall County, Illinois. It was in force for 15 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: Nov 10, 2020, 3:45 PM CST (21:45 UTC)
Expired: Nov 10, 2020, 4:00 PM CST
In force: 15 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Marshall County, IL

The radar

The Lincoln radar (KILX), 106 km from the middle of the area, began a volume at 21:49 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
Nov 10, 11:22 AM CST	Severe Thunderstorm Watch	SPC	7 hr
Nov 10, 2:05 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.8 hours before the alert went out and 110 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: 97 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 614 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 173 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

612 
WFUS53 KILX 102145
TORILX
ILC123-102200-
/O.NEW.KILX.TO.W.0021.201110T2145Z-201110T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lincoln IL
345 PM CST Tue Nov 10 2020

The National Weather Service in Lincoln has issued a

* Tornado Warning for...
  Northwestern Marshall County in central Illinois...

* Until 400 PM CST.

* At 344 PM CST, severe thunderstorms capable of producing both
  tornadoes and extensive straight line wind damage were located near
  Sparland, or near Lacon, moving northeast at 55 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
  northwestern Marshall County, including the following locations...
  Marshall-Putnam County Fairgrounds.

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 cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.

&&

LAT...LON 4112 8933 4110 8935 4110 8924 4102 8945
      4108 8952 4115 8945 4115 8933
TIME...MOT...LOC 2144Z 229DEG 48KT 4108 8942 

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

$$

37

1 follow-up statement

517 
WWUS53 KILX 102155
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
355 PM CST Tue Nov 10 2020

ILC123-102204-
/O.EXP.KILX.TO.W.0021.000000T0000Z-201110T2200Z/
Marshall-
355 PM CST Tue Nov 10 2020

...THE TORNADO WARNING FOR NORTHWESTERN MARSHALL COUNTY WILL EXPIRE
AT 400 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 800 PM CST for central
Illinois.

LAT...LON 4112 8933 4110 8935 4110 8924 4102 8945
      4108 8952 4115 8945 4115 8933
TIME...MOT...LOC 2154Z 229DEG 48KT 4116 8930 

$$

37

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 10, 2:46 AM CST	Wind Advisory	ILX	Cass, Champaign, Christian, DeWitt, Fulton, Knox and 16 more	17 hr
Nov 10, 2:01 PM CST	Severe Thunderstorm Warning	ILX	Fulton, Knox	44 min
Nov 10, 2:14 PM CST	Special Weather Statement	ILX	Cass, Schuyler, Scott	46 min
Nov 10, 2:41 PM CST	Severe Thunderstorm Warning	ILX	Fulton, Knox, Mason, Peoria, Stark, Tazewell	49 min
Nov 10, 2:51 PM CST	Tornado Warning	ILX	Fulton, Knox, Peoria	24 min
Nov 10, 2:57 PM CST	Special Weather Statement	ILX	Cass, Morgan, Scott	48 min
Nov 10, 3:25 PM CST	Severe Thunderstorm Warning	ILX	Fulton, Knox, Marshall, Mason, Peoria, Stark and 2 more	50 min
Nov 10, 4:08 PM CST	Severe Thunderstorm Warning	ILX	McLean, Marshall, Tazewell, Woodford	52 min
Nov 10, 4:50 PM CST	Special Weather Statement	ILX	Macon	25 min
Nov 10, 4:59 PM CST	Severe Thunderstorm Warning	ILX	McLean	24 min
Nov 10, 5:33 PM CST	Special Weather Statement	ILX	Macon, Piatt	27 min
Nov 10, 5:58 PM CST	Special Weather Statement	ILX	Champaign, Moultrie, Piatt, Shelby	32 min

Nearby

Tornado Warnings in Illinois, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.