Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 21, NWS Springfield, MO

April 7, 2021Webster County, Wright County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Apr 7, 2021, 3:27 PM CDT for Webster County, Wright County, Missouri. It was in force for 48 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: Apr 7, 2021, 3:27 PM CDT (20:27 UTC)
Expired: Apr 7, 2021, 4:15 PM CDT
In force: 48 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 49 km from the middle of the area, began a volume at 20:30 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 7, 12:02 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.5 hours before the alert went out and 95 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: 790 J/kg
Mixed-layer CIN: -275 J/kg
Mixed-layer LCL: 767 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

365 
WUUS53 KSGF 072027
SVRSGF
MOC225-229-072115-
/O.NEW.KSGF.SV.W.0021.210407T2027Z-210407T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
327 PM CDT Wed Apr 7 2021

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  Central Webster County in southwestern Missouri...
  Northwestern Wright County in southwestern Missouri...

* Until 415 PM CDT.

* At 327 PM CDT, a severe thunderstorm was located over Diggins, or
  10 miles south of Marshfield, moving northeast at 45 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.

* Locations impacted include...
  Marshfield...                     Fordland...
  Niangua...                        Duncan...
  Diggins...                        Rader...
  Grovespring...                    Northview...

This includes Interstate 44 between mile markers 96 and 108.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3723 9305 3748 9285 3747 9240 3707 9289
TIME...MOT...LOC 2027Z 219DEG 38KT 3718 9289 

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

Raberding

3 follow-up statements

059 
WWUS53 KSGF 072038
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
338 PM CDT Wed Apr 7 2021

MOC225-229-072115-
/O.CON.KSGF.SV.W.0021.000000T0000Z-210407T2115Z/
Webster MO-Wright MO-
338 PM CDT Wed Apr 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR NORTHEASTERN WEBSTER AND NORTHWESTERN WRIGHT COUNTIES...

At 338 PM CDT, a severe thunderstorm was located near Niangua, or
near Marshfield, moving northeast at 40 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.

Locations impacted include...
Marshfield...                     Niangua...
Duncan...                         Diggins...
Grovespring...                    Rader...

This includes Interstate 44 between mile markers 96 and 108.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3748 9285 3747 9240 3716 9283 3730 9299
TIME...MOT...LOC 2038Z 230DEG 26KT 3732 9280 

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

Raberding

141 
WWUS53 KSGF 072049
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
349 PM CDT Wed Apr 7 2021

MOC225-229-072115-
/O.CON.KSGF.SV.W.0021.000000T0000Z-210407T2115Z/
Webster MO-Wright MO-
349 PM CDT Wed Apr 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR NORTHEASTERN WEBSTER AND NORTHWESTERN WRIGHT COUNTIES...

At 349 PM CDT, a severe thunderstorm was located 7 miles east of
Niangua, or 12 miles east of Marshfield, moving northeast at 40 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.

Locations impacted include...
Niangua...                        Duncan...
Grovespring...                    Rader...

This includes Interstate 44 near mile marker 105.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3748 9285 3747 9240 3726 9269 3742 9288
TIME...MOT...LOC 2049Z 230DEG 29KT 3739 9269 

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

Raberding

833 
WWUS53 KSGF 072107
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
407 PM CDT Wed Apr 7 2021

MOC225-229-072117-
/O.EXP.KSGF.SV.W.0021.000000T0000Z-210407T2115Z/
Webster MO-Wright MO-
407 PM CDT Wed Apr 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WEBSTER AND
NORTHWESTERN WRIGHT COUNTIES WILL EXPIRE AT 415 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
southwestern Missouri.

LAT...LON 3748 9285 3747 9240 3726 9269 3742 9288
TIME...MOT...LOC 2107Z 219DEG 38KT 3751 9256 

$$

Raberding

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 7:16 AM CDT	Special Weather Statement	SGF	Christian	29 min
Apr 7, 12:39 PM CDT	Special Weather Statement	SGF	Dade	36 min
Apr 7, 1:04 PM CDT	Special Weather Statement	SGF	St. Clair	26 min
Apr 7, 2:07 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Greene, Stone	38 min
Apr 7, 2:38 PM CDT	Severe Thunderstorm Warning	SGF	Benton, Camden, Morgan	52 min
Apr 7, 2:46 PM CDT	Tornado Warning	SGF	Benton, Morgan	29 min
Apr 7, 3:56 PM CDT	Severe Thunderstorm Warning	SGF	Miller	34 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.