Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 29, NWS Springfield, MO

April 9, 2021Howell County, Oregon County, Shannon County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Apr 9, 2021, 4:24 PM CDT for Howell County, Oregon County, Shannon County, Missouri. It was in force for 30 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: Apr 9, 2021, 4:24 PM CDT (21:24 UTC)
Expired: Apr 9, 2021, 4:54 PM CDT
In force: 30 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Howell County, MO, Oregon County, MO, Shannon County, MO

The radar

The Springfield radar (KSGF), 186 km from the middle of the area, began a volume at 21:28 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
Apr 9, 4:24 PM CDT	TSTM WND DMG	Brandsville, MO	ELECTRIC COMPANY REPORTED HUNDREDS OF OUTAGES DUE TO HIGH WINDS ACROSS THE HOWELL-OREGON COUNTY ELECTRIC AREA. SEVERAL PUBLIC WEATHER STATIONS REPORTED MEASURED WIND GUSTS OF 45 TO 55 MPH FROM 4PM TO 430PM.

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
Apr 9, 3:13 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.4 hours before the alert went out and 219 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: 107 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1650 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 415 m²/s²
0-3 km storm-relative helicity: 429 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

308 
WUUS53 KSGF 092124
SVRSGF
MOC091-149-203-092215-
/O.NEW.KSGF.SV.W.0029.210409T2124Z-210409T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
424 PM CDT Fri Apr 9 2021

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  Southern Shannon County in south central Missouri...
  Northeastern Howell County in south central Missouri...
  Oregon County in south central Missouri...

* Until 515 PM CDT.

* At 424 PM CDT, severe thunderstorms were located along a line
  extending from 8 miles east of West Plains to near Alton to 12
  miles west of Gatewood, moving north at 30 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...
  Mountain View...                  Winona...
  Alton...                          Birch Tree...
  Eminence...                       Summersville...
  Brandsville...                    Montier...
  Thomasville...                    Peace Valley...
  Teresita...                       Wilderness...
  Couch...                          Rover...
  Alley Spring...                   West Eminence...
  Greer...                          

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3708 9109 3708 9122 3683 9123 3682 9111
      3671 9112 3656 9121 3660 9148 3667 9181
      3705 9171 3705 9166 3720 9165 3709 9107
TIME...MOT...LOC 2124Z 199DEG 28KT 3671 9171 3666 9146 3663 9128 

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

Terry

2 follow-up statements

933 
WWUS53 KSGF 092138
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
438 PM CDT Fri Apr 9 2021

MOC091-203-092147-
/O.CAN.KSGF.SV.W.0029.000000T0000Z-210409T2215Z/
Shannon MO-Howell MO-
438 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SHANNON AND
NORTHEASTERN HOWELL COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central Missouri.

LAT...LON 3659 9119 3661 9136 3683 9121 3682 9111
      3671 9112
TIME...MOT...LOC 2137Z 217DEG 34KT 3672 9117 

$$

MOC149-092215-
/O.CON.KSGF.SV.W.0029.000000T0000Z-210409T2215Z/
Oregon MO-
438 PM CDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR EAST CENTRAL OREGON COUNTY...

At 437 PM CDT, a severe thunderstorm was located 7 miles southwest of
Handy, or 20 miles west of Doniphan, 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...
Wilderness...                     

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3659 9119 3661 9136 3683 9121 3682 9111
      3671 9112
TIME...MOT...LOC 2137Z 217DEG 34KT 3672 9117 

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

Terry

369 
WWUS53 KSGF 092154
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
454 PM CDT Fri Apr 9 2021

MOC149-092204-
/O.CAN.KSGF.SV.W.0029.000000T0000Z-210409T2215Z/
Oregon MO-
454 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL OREGON COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central Missouri.

LAT...LON 3659 9119 3661 9136 3683 9121 3682 9111
      3671 9112
TIME...MOT...LOC 2153Z 199DEG 28KT 3685 9112 

$$

Terry

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 2:34 PM CDT	Special Weather Statement	SGF	McDonald	26 min
Apr 9, 2:54 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Stone, Taney	51 min
Apr 9, 2:58 PM CDT	Special Weather Statement	SGF	Newton	32 min
Apr 9, 3:19 PM CDT	Special Weather Statement	SGF	Ozark	26 min
Apr 9, 3:24 PM CDT	Special Weather Statement	SGF	Newton	36 min
Apr 9, 3:29 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Lawrence, Stone	46 min
Apr 9, 3:41 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Oregon, Ozark	49 min
Apr 9, 3:48 PM CDT	Special Weather Statement	SGF	Jasper	27 min
Apr 9, 3:52 PM CDT	Severe Thunderstorm Warning	SGF	Jasper, Newton	38 min
Apr 9, 3:54 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Lawrence	39 min
Apr 9, 4:03 PM CDT	Special Weather Statement	SGF	Christian	27 min
Apr 9, 4:18 PM CDT	Severe Thunderstorm Warning	SGF	Jasper	42 min
Apr 9, 4:32 PM CDT	Special Weather Statement	SGF	Greene, Jasper, Lawrence	28 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.