Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 252, NWS Springfield, MO

July 20, 2018Howell County, Shannon County, Texas County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Jul 20, 2018, 4:44 PM CDT for Howell County, Shannon County, Texas County, Missouri. It was in force for 33 min. 3 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: Jul 20, 2018, 4:44 PM CDT (21:44 UTC)
Expired: Jul 20, 2018, 5:17 PM CDT
In force: 33 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Howell County, MO, Shannon County, MO, Texas County, MO

The radar

The Springfield radar (KSGF), 159 km from the middle of the area, began a volume at 21:45 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 20, 4:52 PM CDT	HAIL 1	Birch Tree, MO	QUARTER SIZE HAIL AT LUCKY'S COUNTRY STORE.
Jul 20, 5:02 PM CDT	HAIL 0.88	1 S Winona, MO	DIME TO NICKLE SIZE HAIL AT CUBE EXPRESS.
Jul 20, 5:03 PM CDT	HAIL 1.75	3 Sw Winona, MO	OBSERVED QUARTER TO SOME GOLFBALL SIZE HAIL. DELAYED REPORT.

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
Jul 20, 3:58 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.7 hours before the alert went out and 193 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: 1151 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 1847 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

777 
WUUS53 KSGF 202144
SVRSGF
MOC091-203-215-202230-
/O.NEW.KSGF.SV.W.0252.180720T2144Z-180720T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
444 PM CDT FRI JUL 20 2018

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  Southwestern Shannon County in south central Missouri...
  Northeastern Howell County in south central Missouri...
  Southeastern Texas County in south central Missouri...

* Until 530 PM CDT.

* At 442 PM CDT, a severe thunderstorm was located 9 miles northeast
  of Willow Springs, moving southeast at 20 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...
  Mountain View...                  Winona...
  Birch Tree...                     Montier...
  Teresita...                       Clear Springs...
  Arroll...                         Pine Crest...

There is a second across southwestern Shannon County that is also 
capable of quarter size hail and 60 mph winds within this warning. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3689 9166 3709 9196 3717 9190 3704 9131
      3689 9131
TIME...MOT...LOC 2142Z 298DEG 17KT 3711 9187 

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

Wise

2 follow-up statements

401 
WWUS53 KSGF 202159
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
459 PM CDT FRI JUL 20 2018

MOC091-215-202208-
/O.CAN.KSGF.SV.W.0252.000000T0000Z-180720T2230Z/
Howell MO-Texas MO-
459 PM CDT FRI JUL 20 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HOWELL AND
SOUTHEASTERN TEXAS COUNTIES 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 1000 PM CDT for
south central Missouri.

LAT...LON 3689 9153 3706 9152 3704 9131 3689 9131
TIME...MOT...LOC 2158Z 281DEG 20KT 3699 9142 

$$

MOC203-202230-
/O.CON.KSGF.SV.W.0252.000000T0000Z-180720T2230Z/
Shannon MO-
459 PM CDT FRI JUL 20 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SOUTHWESTERN SHANNON COUNTY...

At 458 PM CDT, a severe thunderstorm was located near Birch Tree, or
15 miles east of Mountain View, moving east at 25 mph.

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

SOURCE...Public. Quarter size hail was reported in Birch Tree with 
         this storm. 

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

Locations impacted include...
Winona...                         Birch Tree...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3689 9153 3706 9152 3704 9131 3689 9131
TIME...MOT...LOC 2158Z 281DEG 20KT 3699 9142 

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

Wise

712 
WWUS53 KSGF 202217
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
517 PM CDT FRI JUL 20 2018

MOC203-202227-
/O.CAN.KSGF.SV.W.0252.000000T0000Z-180720T2230Z/
Shannon MO-
517 PM CDT FRI JUL 20 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SHANNON COUNTY IS
CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Missouri.

LAT...LON 3689 9153 3706 9152 3704 9131 3689 9131
TIME...MOT...LOC 2215Z 298DEG 17KT 3695 9132 

$$

Wise

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:10 PM CDT	Severe Thunderstorm Warning	SGF	Ozark	65 min
Jul 19, 7:31 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Howell, Texas, Wright	59 min
Jul 19, 8:14 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Ozark	36 min
Jul 20, 1:23 AM CDT	Special Weather Statement	SGF	Barton	52 min
Jul 20, 2:29 AM CDT	Special Weather Statement	SGF	Polk	31 min
Jul 20, 2:55 AM CDT	Severe Thunderstorm Warning	SGF	St. Clair, Vernon	50 min
Jul 20, 3:21 AM CDT	Special Weather Statement	SGF	Dallas, Hickory	54 min
Jul 20, 3:27 AM CDT	Severe Thunderstorm Warning	SGF	Camden, Dallas, Hickory	33 min
Jul 20, 3:48 AM CDT	Heat Advisory	SGF	Barry, Barton, Christian, Dade, Douglas, Greene and 13 more	16 hr
Jul 20, 4:25 AM CDT	Special Weather Statement	SGF	Camden	50 min
Jul 20, 6:22 AM CDT	Special Weather Statement	SGF	Polk	23 min
Jul 20, 7:03 AM CDT	Severe Thunderstorm Warning	SGF	Greene, Webster	42 min
Jul 20, 7:28 AM CDT	Special Weather Statement	SGF	Ozark	47 min
Jul 20, 7:41 AM CDT	Special Weather Statement	SGF	Douglas	34 min
Jul 20, 10:12 AM CDT	Excessive Heat Warning	SGF	Barry, Howell, Jasper, McDonald, Newton, Oregon and 3 more	10 hr
Jul 20, 4:49 PM CDT	Severe Thunderstorm Warning	SGF	Shannon	29 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2018 Every severe thunderstorm warning in 2018

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.