Severe Thunderstorm Warning 192, NWS Springfield, MO

Area Forecast Discussion
National Weather Service Springfield MO
1254 AM CDT Sun Jun 18 2023

...AVIATION UPDATE...

Key Messages:

1. Storm complex will move through the area tonight. Wind gusts up
to 65 mph, hail up to the size of quarters, and locally heavy
rainfall are the primary hazards.

2. Showers and thunderstorms linger into Father's Day; most
widespread east of the Hwy 65 corridor.

3. Warmer and mostly dry next work week.

.MESOSCALE DISCUSSION...
Issued at 821 PM CDT Sat Jun 17 2023

Severe convection has developed as expected from western Kansas
into the Texas Panhandle. This activity is quickly growing
upscale into a mesoscale convective system (MCS) given a high CAPE
environment favoring aggressive cold pool conglomeration.

Given the highly unstable environment ahead of this MCS (MUCAPEs of
3000-4000 J/kg), it will likely follow forward propagating
Corfidi vectors. Confidence is therefore high that this activity
will advance east across southern Kansas and northern Oklahoma
throughout the remainder of the evening with perhaps a slight turn
to the east-southeast into higher instability. This will include an
attendant threat for 60-75 mph winds.

As this MCS (squall line) begins to approach extreme southeastern
Kansas and the I-49 corridor around 1 AM, it is expected to begin
a gradual decaying phase. However, the initial decaying stages of
an MCS often feature a mesoscale rear inflow jet descending
towards the surface. Thus, we believe that wind gusts of 50-65 mph
are plausible generally southwest of a Stockton to Springfield to
Theodosia line as this squall line moves east across that region
through the 3 AM time frame. Potential wind speeds should then
drop off farther east across the Missouri Ozarks as the MCS
continues to decay during the predawn hours.

Other potential hazards with this MCS will be hail to the size of
quarters and locally heavy rainfall. As mentioned in the previous
AFD, the 12Z HREF localized probability matched-mean product
indicated isolated pockets of rainfall in the 3-4" range. The last
several runs of the HRRR have maintained local pockets of 2-3"
amounts. If the higher-end values do indeed indeed pan out, there
would be a localized flash flooding risk.

Given that the cold pool with this MCS will be outflow dominant
(owing to weak low-level shear), the threat for tornadoes looks
almost non-existent.

.SHORT TERM...(This evening through Sunday)
Issued at 107 PM CDT Sat Jun 17 2023

Water vapor imagery showed an upper-level trough axis centered
over Colorado early this afternoon. This wave will provide the
impulse for MCS development this afternoon and evening across the
Plains as it pushes eastward. Storms likely begin to enter far
southeastern Kansas and western Missouri shortly after midnight
tonight. Mid- level lapse rates of 8 C/km will produce moderate to
strong instability of 2000-3000 J/kg across our southwest CWA.
While the best shear looks to be west and south of our area closer
to the subtropical jet, 0-3 km bulk shear values of 20-30 kt
should aid in storm organization across our southwestern CWA.
These ingredients could allow for hail up to the size of quarters
and straight line wind gusts up to 60 mph. Storms look to outrun
the better instability as they push east through our area, so
expecting a weakening trend overnight.

The other hazard with this activity will be localized flash
flooding. High precipitable water values near the 90th percentile
relative to climatology are supportive of efficient rain rates.
The 12Z HREF Localized Probability Matched-Mean (which is
typically a good indicator of reasonable high-end rain totals)
shows pockets of 3-4 inches of rainfall into Sunday morning. One
mitigating factor is that storm motion looks to be fairly quick,
so the dwell time of a heavy downpour over any given location
should be short. However, will still have to monitor for localized
flash-flooding where rainfall rates are high.

Showers and thunderstorms look to linger into Sunday. The most
widespread coverage looks to be along and east of the Highway 65
corridor, with the activity being more scattered in nature to the
west. There is a low chance for a strong to severe storm or two
given marginal shear and instability; however, confidence is low
as it will likely be conditional on tonight's activity.
Temperatures Sunday will be a bit cooler, with highs in the upper
70s to low 80s.

.LONG TERM...(Sunday Night through Saturday)
Issued at 107 PM CDT Sat Jun 17 2023

Storms largely look to move out of the area Sunday evening. Kept low-
end rain chances across the eastern Ozarks and south-central
Missouri into Monday as the upper-level waves stalls out and cuts
off a low pressure center across the Tennessee Valley, but most
of the day and most of the area looks dry.

Ensemble guidance then shows a high amplitude ridge building
across the central US, which will bring warmer than normal and
mostly dry conditions to the area through the work week. NBM
temperature spreads suggest daily highs in the mid 80s to low 90s
each day, with overnight lows in the 60s. More uncertainty is
introduced into the forecast by next weekend as model guidance
begins to significantly diverge.

&&

.AVIATION...(For the 06Z TAFS through 06Z Sunday night)
Issued at 1246 AM CDT Sun Jun 18 2023

The complex of thunderstorms moving in from the west will push
through the area prior to sunrise, posing a damaging wind
threat. Additional showers and thunderstorms are then expected
this morning into this evening, but will be more scattered in
nature. Will need to monitor for fog potential Sunday night into
early Monday.

&&

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

SHORT TERM...Didio
LONG TERM...Didio
AVIATION...Titus

Hazardous Weather Outlook
National Weather Service Springfield MO
104 AM CDT Sun Jun 18 2023

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-190615-
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-
104 AM CDT Sun Jun 18 2023

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Limited hail risk.
  Limited thunderstorm wind damage risk.
  Significant lightning risk.
  Elevated excessive rainfall risk
  Limited non thunderstorm wind risk.

DISCUSSION...

  A thunderstorm complex is expected to move in from the west
  around late this evening and overnight. Some weakening may occur
  as it pushes into the area with the loss of daytime heating, but
  we will still have the potential of some severe weather with
  damaging wind gusts of 65 to 70 mph and hail to the size of
  quarters. The primary area of concern with these storms is over
  southeastern Kansas and far southwestern Missouri (southwest of
  a line from Nevada to Marshfield to West Plains).

  Locally heavy rainfall may lead to localized flooding
  overnight.

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

  A threat for damaging winds to 65 mph with a decaying
  thunderstorm complex will exist across southern Missouri Sunday
  morning. Some redevelopment of storms will be possible in the
  eastern Ozarks during the afternoon with some strong to severe
  storms again possible. Large hail to the size of quarters and
  damaging wind gusts up to 60 mph will be the main risks.

  Locally heavy rainfall may lead to localized flooding on
  Sunday.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation may be needed later today or tonight for
  southwest Missouri and extreme southeast Kansas.

&&

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

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

Lindenberg

Preliminary Local Storm Report
National Weather Service Springfield MO
213 AM CDT Sun Jun 18 2023

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

0150 AM     Tstm Wnd Dmg     3 ENE South West City   36.54N 94.56W
06/18/2023                   McDonald           MO   Emergency Mngr

            Several trees down in the Noel and Southwest
            city area. Time estimated via radar.

&&

MB

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