Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 50, NWS Springfield, MO

May 9, 20214 counties in Missouri

NWS Springfield, MO issued this severe thunderstorm warning at May 9, 2021, 4:09 AM CDT for 4 counties in Missouri. It was in force for 51 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 9, 2021, 4:09 AM CDT (09:09 UTC)
Expired: May 9, 2021, 5:00 AM CDT
In force: 51 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Dallas County, MO, Greene County, MO, Polk County, MO, Webster County, MO

The radar

The Springfield radar (KSGF), 26 km from the middle of the area, began a volume at 09:08 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.

What was reported inside it

Time	Report	Where	Remark
May 9, 4:22 AM CDT	HAIL 1	3 Sse Morrisville, MO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 9.2 hours before the alert went out and 77 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: 2 J/kg
Mixed-layer CIN: -429 J/kg
Mixed-layer LCL: 2095 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 370 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

525 
WUUS53 KSGF 090909
SVRSGF
MOC059-077-167-225-091000-
/O.NEW.KSGF.SV.W.0050.210509T0909Z-210509T1000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
409 AM CDT Sun May 9 2021

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  Northern Webster County in southwestern Missouri...
  Southern Dallas County in southwestern Missouri...
  Southern Polk County in southwestern Missouri...
  Greene County in southwestern Missouri...

* Until 500 AM CDT.

* At 408 AM CDT, a severe thunderstorm was located near Walnut Grove,
  or 16 miles south of Bolivar, moving east at 50 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Northern Springfield...           Marshfield...
  Willard...                        Strafford...
  Ash Grove...                      Fair Grove...
  Walnut Grove...                   Pleasant Hope...
  Niangua...                        Duncan...
  Elkland...                        Sacville...
  Glidewell...                      Ebenezer...
  Bassville...                      Brighton...
  Bois D'arc...                     Northview...
  Olive...                          Cave Springs...

This includes Interstate 44 between mile markers 72 and 109.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3746 9361 3749 9285 3748 9274 3724 9268
      3721 9360
TIME...MOT...LOC 0908Z 263DEG 41KT 3738 9349 

HAIL...1.25IN
WIND...60MPH
 
$$

Lindenberg

1 follow-up statement

393 
WWUS53 KSGF 090954
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
454 AM CDT Sun May 9 2021

MOC059-077-167-225-091004-
/O.EXP.KSGF.SV.W.0050.000000T0000Z-210509T1000Z/
Webster MO-Dallas MO-Polk MO-Greene MO-
454 AM CDT Sun May 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WEBSTER...SOUTHERN
DALLAS...SOUTHERN POLK AND GREENE COUNTIES WILL EXPIRE AT 500 AM
CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses 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 this thunderstorm.

LAT...LON 3746 9361 3749 9285 3748 9274 3724 9268
      3721 9360
TIME...MOT...LOC 0954Z 263DEG 41KT 3744 9285 

$$

Lindenberg

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 8:02 PM CDT	River Flood Warning	SGF	Vernon	3 days
May 9, 1:58 AM CDT	Special Weather Statement	SGF	Morgan	32 min
May 9, 2:10 AM CDT	Special Weather Statement	SGF	Newton	50 min
May 9, 2:23 AM CDT	Severe Thunderstorm Warning	SGF	McDonald	39 min
May 9, 2:28 AM CDT	Special Weather Statement	SGF	Morgan	47 min
May 9, 2:44 AM CDT	Severe Thunderstorm Warning	SGF	Barry, McDonald	46 min
May 9, 2:47 AM CDT	Special Weather Statement	SGF	Lawrence, Newton	43 min
May 9, 3:14 AM CDT	Special Weather Statement	SGF	Christian, Greene, Webster	46 min
May 9, 3:17 AM CDT	Severe Thunderstorm Warning	SGF	Barry, Stone	43 min
May 9, 3:22 AM CDT	Severe Thunderstorm Warning	SGF	Greene, Webster	38 min
May 9, 3:23 AM CDT	Severe Thunderstorm Warning	SGF	Barry, Christian, Greene, Lawrence, Stone	52 min
May 9, 3:37 AM CDT	Severe Thunderstorm Warning	SGF	Dade, Greene, Lawrence, Polk	38 min
May 9, 3:39 AM CDT	Severe Thunderstorm Warning	SGF	Christian, Douglas, Stone, Taney	51 min
May 9, 3:46 AM CDT	Areal Flood Advisory	SGF	Cedar, St. Clair, Vernon	6 hr
May 9, 4:04 AM CDT	Special Weather Statement	SGF	Christian, Greene, Webster	41 min
May 9, 4:11 AM CDT	Severe Thunderstorm Warning	SGF	Christian, Douglas, Ozark, Taney	49 min
May 9, 4:23 AM CDT	Areal Flood Advisory	SGF	Cedar, Dade, Greene, Polk, St. Clair, Vernon	6 hr
May 9, 4:44 AM CDT	Special Weather Statement	SGF	Wright	46 min
May 9, 4:56 AM CDT	Special Weather Statement	SGF	Douglas, Howell	49 min
May 9, 5:08 AM CDT	Areal Flood Advisory	SGF	Christian, Dallas, Greene, Laclede, Polk, Webster and 1 more	6 hr
May 9, 5:26 AM CDT	Areal Flood Advisory	SGF	Christian, Douglas, Ozark, Taney, Webster, Wright	6 hr
May 9, 5:32 AM CDT	Special Weather Statement	SGF	Ozark	43 min
May 9, 6:12 AM CDT	Areal Flood Advisory	SGF	Barton, Cedar, Dade, Greene, Jasper, Lawrence and 1 more	6 hr
May 9, 6:53 AM CDT	Areal Flood Advisory	SGF	Barry, Christian, Greene, Jasper, Lawrence, Newton and 3 more	6 hr
May 9, 7:14 AM CDT	Special Weather Statement	SGF	Cedar	46 min
May 9, 7:38 AM CDT	Special Weather Statement	SGF	Dade	52 min
May 9, 7:48 AM CDT	River Flood Warning	SGF	Bates, Vernon	23 hr
May 9, 8:59 AM CDT	Severe Thunderstorm Warning	SGF	Barry, Stone	31 min
May 9, 9:51 AM CDT	Areal Flood Advisory	SGF	Barton, Cedar, Dade, Dallas, Polk, Vernon	6 hr
May 9, 9:56 AM CDT	Severe Thunderstorm Warning	SGF	Stone, Taney	34 min
May 9, 10:35 AM CDT	Special Weather Statement	SGF	Ozark	25 min
May 9, 10:57 AM CDT	Areal Flood Advisory	SGF	Barry, Christian, Douglas, Greene, Lawrence, Stone and 3 more	10 hr
May 9, 11:21 AM CDT	Areal Flood Advisory	SGF	Howell, Ozark	14 hr
May 9, 2:59 PM CDT	Areal Flood Warning	SGF	Barry, Stone	4 hr
May 9, 3:18 PM CDT	Areal Flood Warning	SGF	Christian, Greene	10 hr

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.