Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 110, NWS Springfield, MO

July 17, 2021Greene County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Jul 17, 2021, 6:16 PM CDT for Greene 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: Jul 17, 2021, 6:16 PM CDT (23:16 UTC)
Expired: Jul 17, 2021, 6:46 PM CDT
In force: 30 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Greene County, MO

The radar

The Springfield radar (KSGF), 10 km from the middle of the area, began a volume at 23:17 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
Jul 17, 6:25 PM CDT	TSTM WND DMG	4 W Bois D'Arc, MO	LARGE TREE DOWN AT HIGHWAY F AND FARM ROAD 25. TIME ESTIMATED FROM RADAR.

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 12:00Z, 11.3 hours before the alert went out and 43 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: 1277 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 784 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: -1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

438 
WUUS53 KSGF 172316
SVRSGF
MOC077-180000-
/O.NEW.KSGF.SV.W.0110.210717T2316Z-210718T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
616 PM CDT Sat Jul 17 2021

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  Southwestern Greene County in southwestern Missouri...

* Until 700 PM CDT.

* At 616 PM CDT, a severe thunderstorm was located 6 miles southeast 
  of Ash Grove, or 8 miles north of Republic, moving east at 15 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...
  Northwestern Springfield...       Republic...
  Willard...                        Brookline...
  Bois D'arc...                     

This includes Interstate 44 between mile markers 59 and 68, and
between mile markers 70 and 74.
 
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 3717 9361 3728 9360 3729 9333 3711 9339
TIME...MOT...LOC 2316Z 278DEG 11KT 3723 9353 

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

Cramer

1 follow-up statement

932 
WWUS53 KSGF 172346
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
646 PM CDT Sat Jul 17 2021

MOC077-172356-
/O.CAN.KSGF.SV.W.0110.000000T0000Z-210718T0000Z/
Greene MO-
646 PM CDT Sat Jul 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GREENE COUNTY IS
CANCELLED...
                
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 has been cancelled.  However heavy rain is
still possible with this thunderstorm.

LAT...LON 3717 9361 3728 9360 3729 9333 3711 9339
TIME...MOT...LOC 2343Z 278DEG 11KT 3722 9342 

$$

Cramer

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:21 PM CDT	Flash Flood Warning	SGF	Greene	110 min
Jul 17, 4:00 PM CDT	Areal Flood Advisory	SGF	Polk, St. Clair, Vernon	4 hr
Jul 17, 4:24 PM CDT	Flash Flood Warning	SGF	Douglas	7 hr
Jul 17, 4:41 PM CDT	Flash Flood Warning	SGF	Polk	7 hr
Jul 17, 4:50 PM CDT	Flash Flood Warning	SGF	St. Clair	7 hr
Jul 17, 5:21 PM CDT	Flash Flood Warning	SGF	Hickory, Polk	6 hr
Jul 17, 5:46 PM CDT	Flash Flood Warning	SGF	Dallas, Polk	6 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.