Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 132, NWS St. Louis, MO

July 10, 2021Iron County, Madison County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 10, 2021, 2:29 AM CDT for Iron County, Madison County, Missouri. It was in force for 21 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: Jul 10, 2021, 2:29 AM CDT (07:29 UTC)
Expired: Jul 10, 2021, 2:50 AM CDT
In force: 21 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Iron County, MO, Madison County, MO

The radar

The St Louis radar (KLSX), 148 km from the middle of the area, began a volume at 07:30 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 nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 7.5 hours before the alert went out and 288 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: 1372 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1621 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

377 
WUUS53 KLSX 100729
SVRLSX
MOC093-123-100800-
/O.NEW.KLSX.SV.W.0132.210710T0729Z-210710T0800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
229 AM CDT Sat Jul 10 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Iron County in southeastern Missouri...
  Madison County in southeastern Missouri...

* Until 300 AM CDT.

* At 229 AM CDT, severe thunderstorms were located along a line
  extending from near Marquand to near Annapolis, moving southeast at
  35 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Marquand around 235 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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 3737 9075 3738 9077 3746 9077 3755 9014
      3731 9015 3732 9055 3727 9055 3727 9075
TIME...MOT...LOC 0729Z 315DEG 31KT 3749 9015 3735 9061 

HAIL...1.25IN
WIND...60MPH
 
$$

Gosselin

2 follow-up statements

551 
WWUS53 KLSX 100744
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
244 AM CDT Sat Jul 10 2021

MOC093-123-100800-
/O.CON.KLSX.SV.W.0132.000000T0000Z-210710T0800Z/
Iron MO-Madison MO-
244 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 AM CDT
FOR SOUTHEASTERN IRON AND SOUTHERN MADISON COUNTIES IN SOUTHEASTERN
MISSOURI...

At 244 AM CDT, severe thunderstorms were located along a line
extending from near Patton to Sam A. Baker State Park, moving
southeast at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

These severe thunderstorms will remain over mainly rural areas of
southeastern Iron and southern Madison Counties in southeastern
Missouri, including the following locations... Sabula, Des Arc,
Chloride and Vulcan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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 3737 9075 3738 9077 3746 9077 3753 9014
      3731 9015 3732 9055 3727 9055 3727 9075
TIME...MOT...LOC 0744Z 315DEG 31KT 3740 9004 3726 9050 

HAIL...1.00IN
WIND...60MPH
 
$$

Gosselin

649 
WWUS53 KLSX 100750
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
250 AM CDT Sat Jul 10 2021

MOC093-123-100759-
/O.CAN.KLSX.SV.W.0132.000000T0000Z-210710T0800Z/
Iron MO-Madison MO-
250 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN IRON AND SOUTHERN
MADISON COUNTIES IN SOUTHEASTERN MISSOURI IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3737 9075 3738 9077 3746 9077 3753 9014
      3731 9015 3732 9055 3727 9055 3727 9075
TIME...MOT...LOC 0749Z 315DEG 31KT 3737 9000 3723 9046 

$$

Gosselin

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:21 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion	39 min
Jul 9, 8:55 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Ralls	50 min
Jul 9, 8:58 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	62 min
Jul 9, 9:00 PM CDT	Severe Thunderstorm Warning	LSX	Knox	45 min
Jul 9, 9:08 PM CDT	Areal Flood Advisory	LSX	Lewis, Marion	32 min
Jul 9, 9:10 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis, Marion, Shelby	65 min
Jul 9, 9:14 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	48 min
Jul 9, 9:36 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Monroe, Pike, Ralls, Shelby	54 min
Jul 9, 9:40 PM CDT	Flash Flood Warning	LSX	Lewis, Marion	3 hr
Jul 9, 10:10 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Monroe, Pike, Ralls	50 min
Jul 9, 10:32 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Shelby	23 min
Jul 9, 10:45 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Lincoln, Montgomery, Pike, Warren	45 min
Jul 9, 11:08 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Osage, Warren	67 min
Jul 9, 11:10 PM CDT	River Flood Warning	LSX	Lewis	5 days
Jul 9, 11:10 PM CDT	River Flood Warning	LSX	Lewis	32 hr
Jul 9, 11:10 PM CDT	River Flood Warning	LSX	Marion	4 days
Jul 9, 11:24 PM CDT	Areal Flood Advisory	LSX	Audrain, Marion, Monroe, Pike, Ralls, Shelby	3 hr
Jul 9, 11:28 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	47 min
Jul 9, 11:57 PM CDT	Areal Flood Advisory	LSX	Lincoln, Pike	3 hr
Jul 9, 11:59 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more	61 min
Jul 10, 12:26 AM CDT	Areal Flood Advisory	LSX	Lincoln, Saint Charles	3 hr
Jul 10, 12:41 AM CDT	Areal Flood Advisory	LSX	Saint Louis, City of Saint Louis	3 hr
Jul 10, 12:42 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	63 min
Jul 10, 1:08 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	52 min
Jul 10, 1:49 AM CDT	River Flood Warning	LSX	Marion	18 hr
Jul 10, 1:50 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Sainte Genevieve, Saint Francois, Washington	40 min
Jul 10, 6:14 AM CDT	River Flood Warning	LSX	Monroe	4 days
Jul 10, 8:30 AM CDT	River Flood Warning	LSX	Lincoln	3 days
Jul 10, 2:15 PM CDT	Areal Flood Advisory	LSX	Saint Charles, Saint Louis	3 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2021 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.