Alert archive / Illinois / Tornado Warnings in 2020

Tornado Warning 2, NWS Lincoln, IL

March 28, 2020Knox County, Illinois

NWS Lincoln, IL issued this tornado warning at Mar 28, 2020, 7:21 PM CDT for Knox County, Illinois. It was in force for 24 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: Mar 28, 2020, 7:21 PM CDT (00:21 UTC)
Expired: Mar 28, 2020, 7:45 PM CDT
In force: 24 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Knox County, IL

The radar

The Quad Cities radar (KDVN), 58 km from the middle of the area, began a volume at 00:23 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
Mar 28, 2:45 PM CDT	Tornado Watch PDS	SPC	6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.4 hours before the alert went out and 57 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: 504 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 963 m above ground
0-6 km bulk shear: 88 kt
0-1 km storm-relative helicity: 480 m²/s²
0-3 km storm-relative helicity: 520 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 9.3

Open this sounding in Storm Lab

The text

As transmitted.

447 
WFUS53 KILX 290021
TORILX
ILC095-290045-
/O.NEW.KILX.TO.W.0002.200329T0021Z-200329T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lincoln IL
721 PM CDT Sat Mar 28 2020

The National Weather Service in Lincoln has issued a

* Tornado Warning for...
  Northwestern Knox County in west central Illinois...

* Until 745 PM CDT.
    
* At 721 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Rio, or 11 miles north of Galesburg, moving
  northeast at 40 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 Knox County.

This includes Interstate 74 between mile markers 34 and 36.
 
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 4115 9025 4106 9043 4107 9044 4115 9044
TIME...MOT...LOC 0021Z 232DEG 34KT 4111 9043 

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

$$

25

2 follow-up statements

725 
WWUS53 KILX 290033
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
733 PM CDT Sat Mar 28 2020

ILC095-290045-
/O.CON.KILX.TO.W.0002.000000T0000Z-200329T0045Z/
Knox-
733 PM CDT Sat Mar 28 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
NORTHWESTERN KNOX COUNTY...
    
At 733 PM CDT, a severe thunderstorm capable of producing a tornado
was located over North Henderson, or 9 miles northwest of Galesburg,
moving northeast 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.

Locations impacted include...
Rio.

This includes Interstate 74 between mile markers 34 and 36.
 
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 4115 9025 4106 9043 4107 9044 4115 9044
TIME...MOT...LOC 0033Z 229DEG 40KT 4107 9046 

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

$$

25

648 
WWUS53 KILX 290044
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
744 PM CDT Sat Mar 28 2020

ILC095-290054-
/O.EXP.KILX.TO.W.0002.000000T0000Z-200329T0045Z/
Knox-
744 PM CDT Sat Mar 28 2020

...THE TORNADO WARNING FOR NORTHWESTERN KNOX COUNTY WILL EXPIRE AT
745 PM CDT...
        
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 900 PM CDT for west central
Illinois.

LAT...LON 4115 9025 4106 9043 4107 9044 4115 9044
TIME...MOT...LOC 0044Z 232DEG 34KT 4113 9036 

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 28, 7:56 PM CDT	Tornado Warning	ILX	Fulton	34 min
Mar 28, 8:56 PM CDT	Tornado Warning	ILX	Peoria, Tazewell, Woodford	28 min
Mar 28, 9:39 PM CDT	Severe Thunderstorm Warning	ILX	Woodford	15 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.