Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 306, NWS Springfield, MO

August 19, 2018Maries County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Aug 19, 2018, 9:57 PM CDT for Maries County, Missouri. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 19, 2018, 9:57 PM CDT (02:57 UTC)
Expired: Aug 19, 2018, 10:37 PM CDT
In force: 40 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Maries County, MO

The radar

The St Louis radar (KLSX), 130 km from the middle of the area, began a volume at 02:57 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.0 hours before the alert went out and 210 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: 851 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 753 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 211 m²/s²
0-3 km storm-relative helicity: 338 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

As transmitted.

835 
WUUS53 KSGF 200257
SVRSGF
MOC125-200400-
/O.NEW.KSGF.SV.W.0306.180820T0257Z-180820T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
957 PM CDT SUN AUG 19 2018

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  Maries County in central Missouri...

* Until 1100 PM CDT.

* At 957 PM CDT, a severe thunderstorm was located 8 miles southwest
  of Vienna, or 21 miles northwest of Rolla, moving northeast at 30
  mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Belle...                          Vienna...
  Brinktown...                      

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3805 9188 3803 9193 3804 9195 3801 9197
      3802 9218 3830 9218 3829 9169
TIME...MOT...LOC 0257Z 217DEG 27KT 3813 9209 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

Burchfield

3 follow-up statements

748 
WWUS53 KSGF 200316
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
1016 PM CDT SUN AUG 19 2018

MOC125-200400-
/O.CON.KSGF.SV.W.0306.000000T0000Z-180820T0400Z/
Maries MO-
1016 PM CDT SUN AUG 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR CENTRAL MARIES COUNTY...

At 1016 PM CDT, a severe thunderstorm was located near Vienna, or 17
miles southwest of Linn, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Belle...                          Vienna...
Brinktown...                      

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3805 9188 3803 9193 3804 9195 3808 9211
      3829 9216 3829 9169
TIME...MOT...LOC 0316Z 217DEG 27KT 3824 9198 

HAIL...<.75IN
WIND...60MPH
 
$$

Burchfield

544 
WWUS53 KSGF 200332
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
1032 PM CDT SUN AUG 19 2018

MOC125-200400-
/O.CON.KSGF.SV.W.0306.000000T0000Z-180820T0400Z/
Maries MO-
1032 PM CDT SUN AUG 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR NORTHEASTERN MARIES COUNTY...

At 1032 PM CDT, a severe thunderstorm was located over Freeburg, or
14 miles south of Linn, moving northeast at 15 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Belle...                          Vienna...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3818 9201 3829 9212 3829 9169 3818 9178
TIME...MOT...LOC 0332Z 215DEG 15KT 3829 9194 

HAIL...<.75IN
WIND...60MPH
 
$$

Burchfield

719 
WWUS53 KSGF 200337
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
1037 PM CDT SUN AUG 19 2018

MOC125-200347-
/O.CAN.KSGF.SV.W.0306.000000T0000Z-180820T0400Z/
Maries MO-
1037 PM CDT SUN AUG 19 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MARIES COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

LAT...LON 3818 9201 3829 9212 3829 9169 3818 9178
TIME...MOT...LOC 0335Z 217DEG 27KT 3832 9191 

$$

Burchfield

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Springfield, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 19, 6:21 PM CDT, 3 hours 36 minutes earlier.

Area forecast discussion, Aug 19, 6:21 PM CDT, 3 hours 36 minutes before

Area Forecast Discussion
National Weather Service Springfield MO
621 PM CDT Sun Aug 19 2018

...Updated for 00Z Aviation Discussion...

.SHORT TERM...(This evening through Monday)

A large shield of showers and thunderstorms extended deep into
extreme southeast Kansas and the Missouri Ozarks this afternoon.
This was in response to an unseasonably strong upper level low
pressure system, that was circulating over the central Plains.

This feature has a surface reflection centered over east central
Kansas, which helped to bring in an airmass rich in moisture, and
slightly more unstable.

Determining if organized thunderstorms will develop late this
afternoon and early evening was the primary forecast challenge
today. Some of the CAMS models showed deep convection, while
others have not.

Shear will be strong for the time of year, however, instability
levels are in question. A Special RAOB was performed at 2pm to
assess how unstable the Ozarks airmass really was. We are
especially focused on the lower distribution of cape, and how much
of it exists.

The HRRR shows organized line segments to developing within an
environment containing 0-3km shear vector magnitudes of around 35
knots. If sufficient low level cape is present, we could
experience pockets of damaging winds, and even a couple of spin up
tornadoes.

Showers and thunderstorms will linger at random late tonight and
into tomorrow. South central Missouri could have a marginal to
slight risk for additional thunderstorms tomorrow. Look for highs
in the low 80s on Monday.

.LONG TERM...(Tuesday through Sunday)

Fall like weather is expected through the rest of the work week as
rain chances end Monday evening. With northwest flow keeping a
cool continental airmass over the region, temperatures will warm
up into the low to mid 80s on an afternoon basis through Thursday.

An upper level speed max is signaled by the models to approach by
Friday, bringing a chance for showers and thunderstorms.

As mid level heights rise toward next weekend, models do suggest a
warming trend, with temperatures back in the 90s.

&&

.AVIATION...(For the 00Z TAFS through 00Z Monday evening)
Issued at 621 PM CDT Sun Aug 19 2018

A line of strong to severe thunderstorms are moving across
southwest Missouri. The line has cleared KJLN, but KSGF and KBBG
will see strong to severe thunderstorms in the next few hours. IFR
visibilities/ceilings along with strong winds likely with this
line, and the potential for tornadoes will also continue. This
line will move east of KBBG and KSGF by 03Z, but still some
remaining showers/storms are not out of the question the
remainder of the night. Mainly VFR conditions then expected behind
the line, although some local MVFR ceilings will be possible in
any remaining showers. Another chance for convection will occur
late in the TAF period.

&&

.SGF WATCHES/WARNINGS/ADVISORIES...
MO...NONE.
KS...NONE.
&&

SHORT TERM...Cramer
LONG TERM...Cramer
AVIATION...Raberding

Hazardous weather outlook, Aug 19, 5:25 PM CDT, 4 hours 32 minutes before

Hazardous Weather Outlook
National Weather Service Springfield MO
525 PM CDT Sun Aug 19 2018

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-202230-
Bourbon-Crawford-Cherokee-Benton-Morgan-Miller-Maries-Vernon-
St. Clair-Hickory-Camden-Pulaski-Phelps-Barton-Cedar-Polk-Dallas-
Laclede-Texas-Dent-Jasper-Dade-Greene-Webster-Wright-Newton-
Lawrence-Christian-Douglas-Howell-Shannon-McDonald-Barry-Stone-
Taney-Ozark-Oregon-
525 PM CDT Sun Aug 19 2018

This Hazardous Weather Outlook is for portions of the Missouri
Ozarks and extreme southeast Kansas.

.DAY ONE...Tonight.

Weather hazards expected...

  Elevated tornado risk.
  Elevated thunderstorm wind damage risk.
  Limited flooding risk.
  Significant lightning risk.

DISCUSSION...

  Severe thunderstorms are expected late this afternoon and
  through this evening. Damaging wind gusts and tornadoes will
  be likely with a few of the most intense thunderstorms.
  Locations along and south of a line from Carthage to Salem
  Missouri with receive the greatest risk for severe weather.

  There is also a limited risk for localized flooding this
  evening.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

  Strong to severe thunderstorms will again be possible Monday
  mainly across the eastern Ozarks.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will be needed across southern Missouri
  through the evening.

&&

More detailed information can be accessed at:
http://www.weather.gov/sgf/sitrep

This product in graphical format...along with other weather...
hydrological and climate information...at
http://www.weather.gov/sgf

Cramer

In the hours before

Local storm report, Aug 19, 7:35 PM CDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
735 PM CDT SUN AUG 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0721 PM     TSTM WND DMG     1 SSW REPUBLIC          37.10N 93.49W
08/19/2018                   GREENE             MO   TRAINED SPOTTER

            SPOTTER REPORTS DOWNED POWER LINES AT THE
            INTERSECTION OF SOUTH ILLINOIS AVE AND
            MELODY LANE SOUTHWEST OF REPUBLIC. SPOTTER
            ALSO SEES SEVERAL LARGE TREE BRANCHES, AND
            SMALL TREE BLOWN DOWN IN THAT SAME AREA.
            6-10" IN DIAMETER. TIME ESTIMATED FROM
            RADAR.

&&

KP

Local storm report, Aug 19, 7:38 PM CDT, 2 hours 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
738 PM CDT SUN AUG 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0723 PM     TSTM WND GST     1 WSW REPUBLIC          37.12N 93.50W
08/19/2018  E60 MPH          GREENE             MO   TRAINED SPOTTER

            SPOTTER REPORTED AN ESTIMATED 60MPH WIND
            GUST AND A LARGE TREE DOWN BLOCKING A
            ROADWAY. TIME ESTIMATED FROM RADAR.

&&

KP

Local storm report, Aug 19, 7:47 PM CDT, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
747 PM CDT SUN AUG 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0332 PM     TORNADO          1 S DIGGINS             37.15N 92.85W
08/19/2018                   WEBSTER            MO   NWS STORM SURVEY

            NWS STORM SURVEY FOUND LIMITED DAMAGE TO
            LIMBS AND ONE UPROOTED TREE WITHIN THE
            REGION WHERE SPOTTERS REPORTED DEBRIS AND
            ROTATION IN THE AIR. PATH FROM SPOTTERS
            EXTENDED FROM NN NORTHEASTWARD ACROSS
            HIGHWAY 60 NEAR BONNET RD WHERE DEBRIS WAS
            REPORTED TO HAVE BLOCKED THE HIGHWAY,
            CONTINUING TO NEAR THE FARM AUCTION BARN,
            AND ENDING APPROXIMATELY NEAR GENTRY ROAD
            AND THE JAMES RIVER. TIME ESTIMATED BY
            RADAR. ESTIMATED BY RADAR.

&&

SR

Local storm report, Aug 19, 7:56 PM CDT, 2 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
756 PM CDT SUN AUG 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0729 PM     TSTM WND DMG     4 S HALF WAY            37.56N 93.25W
08/19/2018                   POLK               MO   EMERGENCY MNGR

            REPORT OF BARN ROOF BLOWN OFF AT SOUTH 210TH
            AND HIGHWAY YY.

&&

KP

Local storm report, Aug 19, 9:13 PM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SPRINGFIELD MO
913 PM CDT SUN AUG 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0628 PM     TORNADO          1 NW MCDOWELL           36.84N 93.81W
08/19/2018                   BARRY              MO   TRAINED SPOTTER

            CORRECTS PREVIOUS TORNADO REPORT FROM 1 NW
            MCDOWELL. SPOTTER CONFIRMS TORNADO ON THE
            GROUND 3 MILES SOUTH OF AURORA, MO.

&&

KP

Local storm report, Aug 19, 9:45 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
945 PM CDT SUN AUG 19 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0703 PM     TSTM WND DMG     2 WSW REPUBLIC          37.11N 93.51W
08/19/2018                   GREENE             MO   PUBLIC

            MULTIPLE TREE LIMBS DOWN WITH MINOR DAMAGE
            TO OUTBUILDINGS. TIME ESTIMATED BY RADAR.

&&

JSS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 7:31 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Dallas, Greene, Polk, Stone, Webster	59 min
Aug 19, 8:00 PM CDT	Areal Flood Advisory	SGF	Greene	3 hr
Aug 19, 8:01 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Dallas, Laclede, Pulaski, Webster	59 min
Aug 19, 9:16 PM CDT	Severe Thunderstorm Warning	SGF	Dent, Laclede, Phelps, Pulaski, Texas	44 min
Aug 19, 11:26 PM CDT	Flash Flood Warning	SGF	Wright	5 hr
Aug 20, 12:47 PM CDT	Severe Thunderstorm Warning	SGF	Howell	43 min
Aug 20, 1:21 PM CDT	Flash Flood Warning	SGF	Howell	2 hr
Aug 20, 1:56 PM CDT	Severe Thunderstorm Warning	SGF	Oregon	64 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.