Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 41, NWS Springfield, MO
NWS Springfield, MO issued this severe thunderstorm warning at May 4, 2021, 1:19 AM CDT for Howell County, Oregon County, Shannon County, Missouri. It was in force for 41 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
- May 4, 2021, 1:19 AM CDT (06:19 UTC)
- Expired
- May 4, 2021, 2:00 AM CDT
- In force
- 41 min
- Issued by
- NWS Springfield, MO
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Howell County, MO, Oregon County, MO, Shannon County, MO
The radar
The Springfield radar (KSGF), 178 km from the middle of the area, began a volume at 06:22 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 |
|---|---|---|---|
| May 4, 1:21 AM CDT | TSTM WND DMG | 7 S West Plains, MO | FOUR LARGE TREES KNOCKED DOWN ON A PROPERTY SEVERAL MILES SOUTH OF WEST PLAINS. REPORT OBTAINED FROM A NEWSPAPER ARTICLE. DELAYED REPORT. 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 |
|---|---|---|---|
| May 3, 9:10 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 6.3 hours before the alert went out and 206 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.
- Mixed-layer CAPE
- 1558 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 972 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.1
The text
As transmitted.
561
WUUS53 KSGF 040619
SVRSGF
MOC091-149-203-040700-
/O.NEW.KSGF.SV.W.0041.210504T0619Z-210504T0700Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
119 AM CDT Tue May 4 2021
The National Weather Service in Springfield has issued a
* Severe Thunderstorm Warning for...
Southwestern Shannon County in south central Missouri...
Southeastern Howell County in south central Missouri...
Oregon County in south central Missouri...
* Until 200 AM CDT.
* At 119 AM CDT, a severe thunderstorm was located 9 miles southeast
of West Plains, 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...
West Plains... Grand Gulf State Park...
Thayer... Winona...
Alton... South Fork...
Koshkonong... Brandsville...
Thomasville... Peace Valley...
Lanton... Myrtle...
Wilderness... Couch...
Rover... White Church...
Greer...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3664 9198 3689 9185 3700 9137 3697 9122
3685 9122 3683 9123 3682 9112 3650 9113
3650 9180
TIME...MOT...LOC 0619Z 240DEG 40KT 3667 9172
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
Burchfield3 follow-up statements
220
WWUS53 KSGF 040632
SVSSGF
Severe Weather Statement
National Weather Service Springfield MO
132 AM CDT Tue May 4 2021
MOC091-040642-
/O.CAN.KSGF.SV.W.0041.000000T0000Z-210504T0700Z/
Howell MO-
132 AM CDT Tue May 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HOWELL COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central Missouri.
LAT...LON 3667 9168 3693 9166 3700 9137 3697 9122
3683 9123 3682 9112 3650 9113 3650 9161
TIME...MOT...LOC 0632Z 240DEG 40KT 3674 9156
$$
MOC149-203-040700-
/O.CON.KSGF.SV.W.0041.000000T0000Z-210504T0700Z/
Shannon MO-Oregon MO-
132 AM CDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT
FOR SOUTHWESTERN SHANNON AND OREGON COUNTIES...
At 132 AM CDT, a severe thunderstorm was located 9 miles west of
Alton, or 15 miles north of 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...
Thayer... Winona...
Alton... Koshkonong...
Thomasville... Rover...
Myrtle... Wilderness...
Couch... Greer...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3667 9168 3693 9166 3700 9137 3697 9122
3683 9123 3682 9112 3650 9113 3650 9161
TIME...MOT...LOC 0632Z 240DEG 40KT 3674 9156
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
Burchfield556
WWUS53 KSGF 040651
SVSSGF
Severe Weather Statement
National Weather Service Springfield MO
151 AM CDT Tue May 4 2021
MOC149-203-040700-
/O.CON.KSGF.SV.W.0041.000000T0000Z-210504T0700Z/
Shannon MO-Oregon MO-
151 AM CDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 AM CDT
FOR SOUTHWESTERN SHANNON AND OREGON COUNTIES...
At 151 AM CDT, a severe thunderstorm was located 10 miles south of
Winona, or 20 miles southwest of Van Buren, moving northeast at 45
mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Winona... Alton...
Thomasville... Myrtle...
Wilderness... Couch...
Greer...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3684 9163 3693 9165 3700 9137 3697 9122
3683 9123 3682 9112 3650 9113 3650 9138
3669 9144
TIME...MOT...LOC 0651Z 240DEG 40KT 3685 9133
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$
Burchfield371
WWUS53 KSGF 040700
SVSSGF
Severe Weather Statement
National Weather Service Springfield MO
200 AM CDT Tue May 4 2021
MOC149-203-040710-
/O.EXP.KSGF.SV.W.0041.000000T0000Z-210504T0700Z/
Shannon MO-Oregon MO-
200 AM CDT Tue May 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SHANNON AND
OREGON COUNTIES HAS EXPIRED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
south central Missouri.
LAT...LON 3684 9163 3693 9165 3700 9137 3697 9122
3683 9123 3682 9112 3650 9113 3650 9138
3669 9144
TIME...MOT...LOC 0700Z 240DEG 40KT 3690 9123
$$
BurchfieldThe office that day
Everything else NWS Springfield, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 12:14 AM CDT | Flash Flood Warning | SGF | Ozark | 6 hr |
| May 4, 12:27 AM CDT | Special Weather Statement | SGF | Ozark | 33 min |
| May 4, 1:02 AM CDT | Special Weather Statement | SGF | Howell | 28 min |
| May 4, 2:43 AM CDT | Areal Flood Warning | SGF | Howell, Oregon, Ozark | 11 hr |
| May 4, 8:27 AM CDT | Areal Flood Advisory | SGF | Barry, Lawrence, McDonald, Newton, Stone | 10 hr |
| May 4, 1:48 PM CDT | Areal Flood Advisory | SGF | Howell, Oregon, Ozark | 4 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.