Alert archive / Illinois / Tornado Warnings in 2021

Tornado Warning 2, NWS St. Louis, MO

March 23, 2021Pike County, Illinois; Pike County, Missouri

NWS St. Louis, MO issued this tornado warning at Mar 23, 2021, 7:04 PM CDT for Pike County, Illinois; Pike County, Missouri. It was in force for 41 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: Mar 23, 2021, 7:04 PM CDT (00:04 UTC)
Expired: Mar 23, 2021, 7:45 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Pike County, IL, Pike County, MO

The radar

The St Louis radar (KLSX), 95 km from the middle of the area, began a volume at 00:04 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
Mar 23, 7:19 PM CDT	TORNADO	2 Wnw Rockport, IL	A STORM CHASER OBSERVED A TORNADO NORTHWEST OF ROCKPORT. THE FUNNEL WAS NOT FULLY CONDENSED BUT THERE WAS A DISTINCT DEBRIS CLOUD EVIDENT FOR SEVERAL MINUTES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.1 hours before the alert went out and 221 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: 281 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 642 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 241 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

118 
WFUS53 KLSX 240004
TORLSX
ILC149-MOC163-240045-
/O.NEW.KLSX.TO.W.0002.210324T0004Z-210324T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
704 PM CDT Tue Mar 23 2021

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Central Pike County in west central Illinois...
  North central Pike County in northeastern Missouri...

* Until 745 PM CDT.
    
* At 704 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Louisiana, moving northeast at 35 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...
  Pike around 710 PM CDT.
  Atlas around 720 PM CDT.
  Pittsfield around 745 PM CDT.

Other locations impacted by this tornadic thunderstorm include El
Dara, Rockport, New Hartford and Summer Hill.

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.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
St Louis.

&&

LAT...LON 3939 9116 3943 9120 3971 9096 3959 9075
TIME...MOT...LOC 0004Z 222DEG 31KT 3944 9113 

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

$$

TES

2 follow-up statements

153 
WWUS53 KLSX 240019
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
719 PM CDT Tue Mar 23 2021

MOC163-240029-
/O.CAN.KLSX.TO.W.0002.000000T0000Z-210324T0045Z/
Pike MO-
719 PM CDT Tue Mar 23 2021

...THE TORNADO WARNING FOR NORTH CENTRAL PIKE COUNTY IN NORTHEASTERN
MISSOURI IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3950 9107 3954 9110 3971 9096 3963 9082
TIME...MOT...LOC 0019Z 215DEG 30KT 3955 9105 

$$

ILC149-240045-
/O.CON.KLSX.TO.W.0002.000000T0000Z-210324T0045Z/
Pike IL-
719 PM CDT Tue Mar 23 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR CENTRAL
PIKE COUNTY IN WEST CENTRAL ILLINOIS...
    
At 719 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Atlas, moving northeast at 35 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
central Pike County in west central Illinois, including the following
locations... El Dara and Rockport.

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 3950 9107 3954 9110 3971 9096 3963 9082
TIME...MOT...LOC 0019Z 215DEG 30KT 3955 9105 

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

$$

TES

342 
WWUS53 KLSX 240041
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
741 PM CDT Tue Mar 23 2021

ILC149-240051-
/O.EXP.KLSX.TO.W.0002.000000T0000Z-210324T0045Z/
Pike IL-
741 PM CDT Tue Mar 23 2021

...THE TORNADO WARNING FOR CENTRAL PIKE COUNTY IN WEST CENTRAL
ILLINOIS WILL EXPIRE AT 745 PM CDT...
                
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 gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3950 9107 3954 9110 3971 9096 3963 9082
TIME...MOT...LOC 0041Z 222DEG 31KT 3968 9089 

$$

TES

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 23, 7:26 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Pike	34 min
Mar 23, 7:35 PM CDT	Tornado Warning	LSX	Calhoun, Pike	25 min
Mar 23, 11:02 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	43 min

Nearby

Tornado Warnings in Illinois, 2021 Tornado Warnings in Missouri, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.