Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 113, NWS Springfield, MO

July 31, 2021St. Clair County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Jul 31, 2021, 4:07 PM CDT for St. Clair County, Missouri. It was in force for 38 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 31, 2021, 4:07 PM CDT (21:07 UTC)
Expired: Jul 31, 2021, 4:45 PM CDT
In force: 38 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County St. Clair County, MO

The radar

The Springfield radar (KSGF), 92 km from the middle of the area, began a volume at 21:08 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

Springfield, MO (KSGF), launched 12:00Z, 9.1 hours before the alert went out and 125 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: 1314 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 1358 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

457 
WUUS53 KSGF 312107
SVRSGF
MOC185-312145-
/O.NEW.KSGF.SV.W.0113.210731T2107Z-210731T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
407 PM CDT Sat Jul 31 2021

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  St. Clair County in west central Missouri...

* Until 445 PM CDT.

* At 407 PM CDT, severe thunderstorms were located along a line
  extending from 6 miles southeast of Appleton City to Osceola,
  moving south at 15 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...
  Osceola around 410 PM CDT.

Other locations impacted by these severe thunderstorms include Truman
Lake, Roscoe, Vista, Gerster, Tiffin, Johnson City, Taberville and
Monegaw Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Truman Lake, get away from the water and move indoors 
or inside a vehicle. Remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 3813 9362 3795 9351 3792 9351 3791 9357
      3795 9406 3819 9405
TIME...MOT...LOC 2107Z 340DEG 15KT 3810 9398 3805 9369 

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

Schaumann

2 follow-up statements

733 
WWUS53 KSGF 312125
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
425 PM CDT Sat Jul 31 2021

MOC185-312145-
/O.CON.KSGF.SV.W.0113.000000T0000Z-210731T2145Z/
St. Clair MO-
425 PM CDT Sat Jul 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR CENTRAL ST. CLAIR COUNTY...

At 424 PM CDT, severe thunderstorms were located along a line
extending from 7 miles south of Appleton City to near Osceola, moving
southeast at 10 mph.

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

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Osceola around 430 PM CDT.

Other locations impacted by these severe thunderstorms include Truman
Lake, Roscoe, Vista, Gerster, Tiffin, Johnson City, Taberville and
Monegaw Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near Truman Lake, get away from the water and move indoors 
or inside a vehicle. Remember, lightning can strike out to 15 miles 
from the parent thunderstorm. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now!  Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 3795 9351 3792 9351 3791 9357 3795 9406
      3816 9405 3810 9360
TIME...MOT...LOC 2124Z 336DEG 10KT 3809 9401 3802 9363 

HAIL...0.88IN
WIND...60MPH
 
$$

Schaumann

312 
WWUS53 KSGF 312142
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
442 PM CDT Sat Jul 31 2021

MOC185-312151-
/O.EXP.KSGF.SV.W.0113.000000T0000Z-210731T2145Z/
St. Clair MO-
442 PM CDT Sat Jul 31 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ST. CLAIR COUNTY WILL
EXPIRE AT 445 PM CDT...
            
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 will be allowed to expire.  However gusty
winds and heavy rain are still possible with these thunderstorms.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Springfield.

LAT...LON 3795 9351 3792 9351 3791 9357 3795 9406
      3816 9405 3810 9360
TIME...MOT...LOC 2141Z 340DEG 15KT 3803 9398 3796 9360 

$$

Schaumann

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 7:40 PM CDT	Special Weather Statement	SGF	Morgan	35 min
Jul 31, 4:12 PM CDT	Severe Thunderstorm Warning	SGF	Camden	33 min
Jul 31, 4:39 PM CDT	Severe Thunderstorm Warning	SGF	Dent, Phelps	51 min
Jul 31, 4:48 PM CDT	Special Weather Statement	SGF	Pulaski	27 min
Jul 31, 4:53 PM CDT	Special Weather Statement	SGF	Dent	22 min
Jul 31, 6:24 PM CDT	Severe Thunderstorm Warning	SGF	Barton, Dade	18 min
Jul 31, 6:38 PM CDT	Special Weather Statement	SGF	Jasper	22 min

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.