Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 39, NWS Springfield, MO

April 28, 2021Oregon County, Shannon County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Apr 28, 2021, 12:30 PM CDT for Oregon County, Shannon County, Missouri. It was in force for 30 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 28, 2021, 12:30 PM CDT (17:30 UTC)
Expired
Apr 28, 2021, 1:00 PM CDT
In force
30 min
Issued by
NWS Springfield, MO
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

Counties Oregon County, MO, Shannon County, MO

The radar

The Springfield radar (KSGF), 191 km from the middle of the area, began a volume at 17:30 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.

IssuedProductOfficeLasted
Apr 28, 9:33 AM CDTTornado WatchSPC4 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 5.5 hours before the alert went out and 226 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2021-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 34 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2021-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
34 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1441 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
127 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

766 
WUUS53 KSGF 281730
SVRSGF
MOC149-203-281800-
/O.NEW.KSGF.SV.W.0039.210428T1730Z-210428T1800Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
1230 PM CDT Wed Apr 28 2021

The National Weather Service in Springfield has issued a

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

* Until 100 PM CDT.

* At 1229 PM CDT, severe thunderstorms were located along a line
  extending from near Birch Tree to near Alton to near Thayer, moving
  northeast at 45 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Ozark National Scenic Riverways...
  Grand Gulf State Park...
  Thayer...                         Winona...
  Alton...                          Birch Tree...
  Eminence...                       Koshkonong...
  Montier...                        Thomasville...
  Myrtle...                         Wilderness...
  Couch...                          Rover...
  Alley Spring...                   West Eminence...
  Greer...                          

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 300 PM CDT for south central
Missouri.

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

&&

LAT...LON 3708 9122 3683 9123 3682 9111 3650 9113
      3650 9167 3675 9167 3687 9161 3706 9162
      3720 9148 3728 9116 3725 9115 3725 9112
      3720 9112 3720 9109 3718 9109 3714 9102
      3709 9102
TIME...MOT...LOC 1729Z 243DEG 40KT 3705 9142 3681 9140 3669 9146 3652
9158

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

Perez
2 follow-up statements
442 
WWUS53 KSGF 281750
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
1250 PM CDT Wed Apr 28 2021

MOC149-203-281800-
/O.CON.KSGF.SV.W.0039.000000T0000Z-210428T1800Z/
Shannon MO-Oregon MO-
1250 PM CDT Wed Apr 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR SOUTHEASTERN SHANNON AND OREGON COUNTIES...

At 1249 PM CDT, severe thunderstorms were located along a line
extending from 10 miles east of Eminence to near Fremont to 6 miles
west of Handy to 6 miles southeast of Alton, moving northeast at 45
mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Ozark National Scenic Riverways...
Winona...
Alton...                          Birch Tree...
Eminence...                       Alley Spring...
Myrtle...                         Wilderness...
West Eminence...                  Couch...
Greer...                          

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 300 PM CDT for south central
Missouri.

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

&&

LAT...LON 3708 9122 3683 9123 3682 9111 3650 9113
      3650 9149 3689 9149 3720 9148 3728 9116
      3725 9115 3725 9112 3720 9112 3720 9109
      3718 9109 3714 9102 3709 9102
TIME...MOT...LOC 1749Z 243DEG 40KT 3715 9117 3691 9115 3679 9122 3662
9134

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

Perez
101 
WWUS53 KSGF 281759
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
1259 PM CDT Wed Apr 28 2021

MOC149-203-281808-
/O.EXP.KSGF.SV.W.0039.000000T0000Z-210428T1800Z/
Shannon MO-Oregon MO-
1259 PM CDT Wed Apr 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SHANNON AND
OREGON COUNTIES WILL EXPIRE AT 100 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.  However heavy rain is still possible with
these thunderstorms.

A Tornado Watch remains in effect until 300 PM CDT for south central
Missouri.

LAT...LON 3708 9122 3683 9123 3682 9111 3650 9113
      3650 9149 3689 9149 3720 9148 3728 9116
      3725 9115 3725 9112 3720 9112 3720 9109
      3718 9109 3714 9102 3709 9102
TIME...MOT...LOC 1758Z 243DEG 40KT 3720 9106 3696 9104 3684 9111 3667
9123

$$

Perez

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 4:48 AM CDTSpecial Weather StatementSGFDade, Greene, Lawrence27 min
Apr 28, 8:01 AM CDTSevere Thunderstorm WarningSGFBarry44 min
Apr 28, 8:25 AM CDTFlash Flood WarningSGFBarry, McDonald6 hr
Apr 28, 8:27 AM CDTSevere Thunderstorm WarningSGFBarry33 min
Apr 28, 8:46 AM CDTFlash Flood WarningSGFBarry, Stone6 hr
Apr 28, 8:51 AM CDTSevere Thunderstorm WarningSGFStone39 min
Apr 28, 9:03 AM CDTTornado WarningSGFStone27 min
Apr 28, 9:14 AM CDTTornado WarningSGFTaney31 min
Apr 28, 9:18 AM CDTSevere Thunderstorm WarningSGFStone, Taney42 min
Apr 28, 9:33 AM CDTFlash Flood WarningSGFChristian, Taney6 hr
Apr 28, 9:37 AM CDTSevere Thunderstorm WarningSGFChristian, Douglas, Ozark, Taney68 min
Apr 28, 9:43 AM CDTTornado WarningSGFChristian, Taney32 min
Apr 28, 9:55 AM CDTRiver Flood WarningSGFShannon44 hr
Apr 28, 9:55 AM CDTRiver Flood WarningSGFPulaski11 hr
Apr 28, 9:55 AM CDTRiver Flood WarningSGFStone10 hr
Apr 28, 9:55 AM CDTRiver Flood WarningSGFMcDonald23 hr
Apr 28, 9:55 AM CDTRiver Flood WarningSGFShannon51 hr
Apr 28, 10:14 AM CDTTornado WarningSGFChristian, Douglas, Webster31 min
Apr 28, 10:15 AM CDTFlash Flood WarningSGFDouglas, Ozark, Taney, Webster, Wright6 hr
Apr 28, 10:21 AM CDTSevere Thunderstorm WarningSGFDouglas, Howell, Ozark, Taney, Webster, Wright39 min
Apr 28, 10:24 AM CDTTornado WarningSGFOzark36 min
Apr 28, 10:44 AM CDTFlash Flood WarningSGFDouglas, Ozark6 hr
Apr 28, 10:58 AM CDTTornado WarningSGFDouglas, Ozark32 min
Apr 28, 11:12 AM CDTFlash Flood WarningSGFHowell, Texas6 hr
Apr 28, 11:27 AM CDTSevere Thunderstorm WarningSGFWright33 min
Apr 28, 11:29 AM CDTSevere Thunderstorm WarningSGFDouglas, Howell22 min
Apr 28, 11:49 AM CDTSevere Thunderstorm WarningSGFHowell, Oregon, Shannon41 min
Apr 28, 12:01 PM CDTFlash Flood WarningSGFDent, Laclede, Phelps, Pulaski, Texas, Wright6 hr
Apr 28, 12:02 PM CDTTornado WarningSGFHowell, Oregon, Shannon28 min
Apr 28, 12:07 PM CDTFlash Flood WarningSGFOregon, Shannon6 hr
Apr 28, 1:48 PM CDTFlash Flood WarningSGFMcDonald6 hr
Apr 28, 2:09 PM CDTFlash Flood WarningSGFMcDonald6 hr
Apr 28, 2:29 PM CDTAreal Flood WarningSGFBarry, Christian, Douglas, McDonald, Ozark, Stone and 2 more29 hr
Apr 28, 2:39 PM CDTAreal Flood WarningSGFDouglas, Ozark, Webster, Wright24 hr
Apr 28, 3:45 PM CDTAreal Flood WarningSGFDent, Howell, Oregon, Phelps, Pulaski, Shannon and 1 more24 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2021Every 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.