Alert archive / Missouri / Tornado Warnings in 2021

Tornado Warning 12, NWS Springfield, MO

March 17, 2021Stone County, Missouri

NWS Springfield, MO issued this tornado warning at Mar 17, 2021, 6:37 PM CDT for Stone County, Missouri. It was in force for 23 min. 2 reports 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: Mar 17, 2021, 6:37 PM CDT (23:37 UTC)
Expired: Mar 17, 2021, 7:00 PM CDT
In force: 23 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Stone County, MO

The radar

The Springfield radar (KSGF), 34 km from the middle of the area, began a volume at 23:35 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
Mar 17, 6:42 PM CDT	TSTM WND DMG	5 S Boaz, MO	SEVERAL LARGE TREES WERE REPORTED DOWN BLOCKING HIGHWAY U NEAR LAKE BRANCH ROAD.
Mar 17, 6:53 PM CDT	TSTM WND GST 70	5 Sse Boaz, MO	WINDS WERE ESTIMATED AT 65-70MPH ALONG WITH NICKLE SIZED HAIL.

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
Mar 17, 2:00 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.6 hours before the alert went out and 32 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: 102 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 956 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

934 
WFUS53 KSGF 172337
TORSGF
MOC209-180000-
/O.NEW.KSGF.TO.W.0012.210317T2337Z-210318T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Springfield MO
637 PM CDT Wed Mar 17 2021

The National Weather Service in Springfield has issued a

* Tornado Warning for...
  Northeastern Stone County in southwestern Missouri...

* Until 700 PM CDT.
    
* At 637 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Crane, or 11 miles west of Highlandville, moving
  northeast at 20 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Hurley...                         

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3691 9355 3699 9349 3699 9334 3692 9334
      3688 9337
TIME...MOT...LOC 2337Z 233DEG 18KT 3689 9349 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Wise

1 follow-up statement

433 
WWUS53 KSGF 172355
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
655 PM CDT Wed Mar 17 2021

MOC209-180004-
/O.EXP.KSGF.TO.W.0012.000000T0000Z-210318T0000Z/
Stone MO-
655 PM CDT Wed Mar 17 2021

...THE TORNADO WARNING FOR NORTHEASTERN STONE COUNTY WILL EXPIRE AT
700 PM CDT...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

A Tornado Watch remains in effect until 800 PM CDT for southwestern
Missouri.

LAT...LON 3691 9355 3699 9349 3699 9334 3692 9334
      3688 9337
TIME...MOT...LOC 2354Z 233DEG 18KT 3694 9341 

$$

Wise

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 2:19 AM CDT	Flash Flood Watch	SGF	Barton, Benton, Camden, Cedar, Christian, Dade and 23 more	19 hr
Mar 17, 2:20 AM CDT	Special Weather Statement	SGF	Laclede	25 min
Mar 17, 4:22 AM CDT	Special Weather Statement	SGF	Benton	23 min
Mar 17, 5:16 AM CDT	Severe Thunderstorm Warning	SGF	Barton, Cedar, Vernon	29 min
Mar 17, 5:33 AM CDT	Severe Thunderstorm Warning	SGF	Barton, Jasper, Newton	57 min
Mar 17, 7:43 AM CDT	Special Weather Statement	SGF	Dallas	32 min
Mar 17, 10:02 AM CDT	Areal Flood Advisory	SGF	Greene, Webster	4 hr
Mar 17, 3:27 PM CDT	Special Weather Statement	SGF	McDonald	33 min
Mar 17, 3:35 PM CDT	Severe Thunderstorm Warning	SGF	McDonald, Newton	40 min
Mar 17, 4:10 PM CDT	Severe Thunderstorm Warning	SGF	Barry, McDonald, Newton	50 min
Mar 17, 4:30 PM CDT	Special Weather Statement	SGF	McDonald	30 min
Mar 17, 4:40 PM CDT	Severe Thunderstorm Warning	SGF	McDonald, Newton	50 min
Mar 17, 4:53 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Jasper, Lawrence, Newton	52 min
Mar 17, 4:55 PM CDT	Severe Thunderstorm Warning	SGF	Barry	50 min
Mar 17, 5:10 PM CDT	Flash Flood Warning	SGF	McDonald, Newton	4 hr
Mar 17, 5:10 PM CDT	Severe Thunderstorm Warning	SGF	Barry, McDonald, Newton	35 min
Mar 17, 5:12 PM CDT	Tornado Warning	SGF	Barry	33 min
Mar 17, 5:32 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Lawrence	43 min
Mar 17, 5:33 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Stone	57 min
Mar 17, 5:33 PM CDT	Tornado Warning	SGF	Barry, Lawrence	27 min
Mar 17, 5:38 PM CDT	Tornado Warning	SGF	Barry	37 min
Mar 17, 5:55 PM CDT	Flash Flood Warning	SGF	Barry, Lawrence, Newton	4 hr
Mar 17, 6:01 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Dade, Greene, Lawrence	44 min
Mar 17, 6:13 PM CDT	Tornado Warning	SGF	Barry, Stone	17 min
Mar 17, 6:20 PM CDT	Tornado Warning Tornado observed	SGF	Barry, Stone	25 min
Mar 17, 6:25 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Stone	50 min
Mar 17, 6:39 PM CDT	Special Weather Statement	SGF	Greene	51 min
Mar 17, 6:48 PM CDT	Severe Thunderstorm Warning	SGF	Christian	57 min
Mar 17, 6:50 PM CDT	Flash Flood Warning	SGF	Barry, Jasper, Lawrence, Stone	4 hr

Nearby

Tornado Warnings in Missouri, 2021 Every tornado warning in 2021 Tornadoes 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.