Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 131, NWS St. Louis, MO

July 10, 20215 counties in Missouri; Randolph County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 10, 2021, 1:50 AM CDT for 5 counties in Missouri; Randolph County, Illinois. It was in force for 40 min. 4 reports 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: Jul 10, 2021, 1:50 AM CDT (06:50 UTC)
Expired: Jul 10, 2021, 2:30 AM CDT
In force: 40 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Randolph County, IL, Iron County, MO, Madison County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 110 km from the middle of the area, began a volume at 06:55 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
Jul 10, 2:06 AM CDT	HAIL 1.75	Ellis Grove, IL
Jul 10, 2:22 AM CDT	TSTM WND DMG	1 Se Fredericktown, MO	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 SE FREDERICKTOWN. TREES DOWN ACROSS THE SOUTHEAST PORTION OF TOWN. TIME ESTIMATED FROM RADAR.
Jul 10, 2:22 AM CDT	TSTM WND DMG	1 Se Fredericktown, MO	TREES DOWN ACROSS THE SOUTHEAST PORTION OF TOWN. TIME ESTIMATED FROM RADAR.
Jul 10, 2:32 AM CDT	TSTM WND DMG	1 Se Fredericktown, MO	CORRECTS PREVIOUS TSTM WND DMG REPORT FROM 1 SE FREDERICKTOWN. TREES DOWN ACROSS THE SOUTHEAST PORTION OF TOWN. TIME ESTIMATED FROM RADAR.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 9, 8:18 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.8 hours before the alert went out and 300 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: 1282 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

418 
WUUS53 KLSX 100650
SVRLSX
ILC157-MOC093-123-186-187-221-100730-
/O.NEW.KLSX.SV.W.0131.210710T0650Z-210710T0730Z/

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

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Randolph County in southwestern Illinois...
  Northeastern Iron County in southeastern Missouri...
  Ste. Genevieve County in southeastern Missouri...
  Northern Madison County in southeastern Missouri...
  Southeastern Washington County in east central Missouri...
  St. Francois County in southeastern Missouri...

* Until 230 AM CDT.

* At 150 AM CDT, severe thunderstorms were located along a line
  extending from near Red Bud to near Ste. Genevieve to near
  Farmington, moving southeast at 55 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.

* Severe thunderstorms will be near...
  Ste. Genevieve and Evansville around 155 AM CDT.
  Chester, Baldwin and St. Mary around 200 AM CDT.
  Fredericktown and Junction City around 205 AM CDT.
  Bremen and Womac around 210 AM CDT.

Other locations in the path of these severe thunderstorms include
Steeleville and Percy.

This includes Interstate 55 in Missouri between exits 141 and 154.
 
This also includes St. Joe State Park, Hawn State Park, Fort Davidson
Historic Site, Felix Valle House State Park, Elephant Rocks State
Park, and Missouri Mines Historic Site.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 200 AM CDT for southwestern
Illinois...and southeastern and east central Missouri.

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

&&

LAT...LON 3746 9066 3751 9077 3760 9077 3761 9083
      3773 9086 3785 9067 3799 9022 3822 8987
      3822 8959 3795 8960 3782 8968 3785 8979
      3791 8984 3785 8996 3764 9015 3744 9014
TIME...MOT...LOC 0650Z 293DEG 48KT 3814 9002 3791 9008 3775 9048 

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

Gosselin

2 follow-up statements

254 
WWUS53 KLSX 100706
SVSLSX

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

MOC221-100716-
/O.CAN.KLSX.SV.W.0131.000000T0000Z-210710T0730Z/
Washington MO-
206 AM CDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 3746 9066 3751 9077 3760 9077 3761 9083
      3773 9086 3774 9056 3822 8987 3822 8959
      3795 8960 3782 8968 3785 8979 3791 8984
      3785 8996 3764 9015 3744 9014
TIME...MOT...LOC 0706Z 293DEG 48KT 3807 8980 3784 8986 3768 9026 

$$

ILC157-MOC093-123-186-187-100730-
/O.CON.KLSX.SV.W.0131.000000T0000Z-210710T0730Z/
Randolph IL-Iron MO-Ste. Genevieve MO-Madison MO-St. Francois MO-
206 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR RANDOLPH COUNTY IN SOUTHWESTERN ILLINOIS...NORTHEASTERN IRON...
STE. GENEVIEVE...NORTHERN MADISON AND SOUTHERN ST. FRANCOIS COUNTIES
IN SOUTHEASTERN MISSOURI...

At 206 AM CDT, severe thunderstorms were located along a line
extending from 7 miles northwest of Bremen to near St. Mary to near
Womac, moving southeast at 55 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 storms will be near...
  Bremen around 210 AM CDT.

Other locations in the path of these severe thunderstorms include
Steeleville and Percy.

This also includes Hawn State Park, Fort Davidson Historic Site,
Felix Valle House State Park, and Elephant Rocks State Park.
 
This includes Interstate 55 in Missouri between exits 141 and 154.
 
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 3746 9066 3751 9077 3760 9077 3761 9083
      3773 9086 3774 9056 3822 8987 3822 8959
      3795 8960 3782 8968 3785 8979 3791 8984
      3785 8996 3764 9015 3744 9014
TIME...MOT...LOC 0706Z 293DEG 48KT 3807 8980 3784 8986 3768 9026 

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

Gosselin

185 
WWUS53 KLSX 100713
SVSLSX

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

ILC157-MOC093-123-186-187-100730-
/O.CON.KLSX.SV.W.0131.000000T0000Z-210710T0730Z/
Randolph IL-Iron MO-Ste. Genevieve MO-Madison MO-St. Francois MO-
213 AM CDT Sat Jul 10 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR RANDOLPH COUNTY IN SOUTHWESTERN ILLINOIS...NORTHEASTERN IRON...
SOUTHERN STE. GENEVIEVE...NORTHERN MADISON AND SOUTHERN ST. FRANCOIS
COUNTIES IN SOUTHEASTERN MISSOURI...

At 213 AM CDT, severe thunderstorms were located along a line
extending from near Bremen to 6 miles south of Chester to Womac,
moving southeast at 55 mph.

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

SOURCE...Trained weather spotters reported hail up to golf ball size 
         earlier near Ellis Grove.

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

These severe storms will be near...
  Steeleville and Percy around 220 AM CDT.

This also includes Hawn State Park, Fort Davidson Historic Site,
Felix Valle House State Park, and Elephant Rocks State Park.
 
This includes Interstate 55 in Missouri between exits 141 and 150.
 
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 3746 9066 3751 9077 3760 9077 3761 9083
      3773 9086 3773 9050 3822 8970 3822 8959
      3795 8960 3782 8968 3785 8979 3791 8984
      3785 8996 3764 9015 3744 9014
TIME...MOT...LOC 0713Z 293DEG 48KT 3805 8975 3782 8981 3766 9021 

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

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, 2:29 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	21 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
Jul 9, 8:07 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	38 min
Jul 9, 8:43 PM CDT	Severe Thunderstorm Warning	LSX	Brown	47 min
Jul 9, 9:17 PM CDT	Severe Thunderstorm Warning	LSX	Brown, Pike	43 min
Jul 9, 10:03 PM CDT	Areal Flood Advisory	LSX	Adams, Brown, Pike	3 hr
Jul 10, 1:36 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Marion, Saint Clair, Washington	54 min
Jul 10, 2:49 AM CDT	River Flood Warning	LSX	Calhoun, Greene, Jersey	10 days
Jul 10, 3:05 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Madison, Saint Clair	21 min
Jul 10, 3:11 PM CDT	Areal Flood Advisory	LSX	Macoupin, Madison	3 hr
Jul 10, 4:31 PM CDT	Severe Thunderstorm Warning	LSX	Clinton, Marion, Randolph, Washington	59 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2021 Severe Thunderstorm Warnings in Illinois, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.