Alert archive / Missouri / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 336, NWS Springfield, MO

August 9, 2023Barry County, Stone County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Aug 9, 2023, 8:12 PM CDT for Barry County, Stone County, Missouri. It was in force for 18 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 9, 2023, 8:12 PM CDT (01:12 UTC)
Expired: Aug 9, 2023, 8:30 PM CDT
In force: 18 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Barry County, MO, Stone County, MO

The radar

The Springfield radar (KSGF), 60 km from the middle of the area, began a volume at 01:15 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 9, 4:04 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.2 hours before the alert went out and 24 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: 1135 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 602 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.7

Open this sounding in Storm Lab

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 9, 6:13 PM CDT, 1 hour 59 minutes earlier.

Area forecast discussion, Aug 9, 6:13 PM CDT, 1 hour 59 minutes before

Area Forecast Discussion
National Weather Service Springfield MO
613 PM CDT Wed Aug 9 2023

Key Messages:

1. Severe thunderstorms expected south of I-44 into this evening.
The most intense storms are expected closer to the Arkansas border
with strong tornadoes...very large hail...and damaging  winds
possible.

2. Flash flooding will all be a concern over southern Missouri
until midnight.

3. Warming trend into the weekend with rain chances (20-40%)
through the weekend.

.SHORT TERM...(This evening through Thursday)
Issued at 234 PM CDT Wed Aug 9 2023

The continuation of a large cluster of showers and thunderstorms
that developed overnight into this morning is exiting south
central MO. The combination of precipital water around 1.75 inches
and training led to 2-4 inches of rain and isolated flooding.

Attention then turns southwest as a warm front across northeast
Oklahoma into northwest Arkansas lifts northward as cloud debris
further thins leading to increasing instability on the order of
2500 joules close to I-44 and 3500 along the Arkansas border. Of
greater concern are the backed surface winds and strong veering
leading to 324 0-1KM shear as measured by the KSGF VWP at 19z.

Sig TOR parameters continue to highlight areas closer to the
Arkansas border for stronger tornado development...though could
still see rotating updrafts along and possibly even north of I-44.
Of concern is the very low LCLs under a 1000 ft which would
increase the tornado threat.

Rainfall/cloud debris north of I-44 will limit instability with a
19z special upper air release continue substantial CinH (CAP),
modeled at 80-100 joules by the 19z HRRR.

Severe storm threat will end northwest to southeast along and
south of Highway 60 this evening as a cold front approaches.

As for flooding...as storms form and then potentially train heavy
rainfall rates may lead to flooding over southern Missouri.

Thursday will then be dry with temperatures under northwest flow
aloft struggling to climb into the mid 80s.

.LONG TERM...(Thursday Night through Wednesday)
Issued at 234 PM CDT Wed Aug 9 2023

The prevailing weather feature this summer, the southwest upper
ridge will then build northward along the front range initially
and then into the Central Plains by this weekend. The main storm
track will remain along the Canadian border with vorticity lobes
along smaller scale waves rotating around  the upper high
expected to lead to diurnal thunderstorm chances Friday into this
weekend before a more substantial wave carves into the ridge
Monday causing height falls and cooling temperatures early next
week.

&&

.AVIATION...(For the 00Z TAFS through 00Z Thursday evening)
Issued at 608 PM CDT Wed Aug 9 2023

For the 00z TAFS, a frontal boundary and upper level trough will
push through the area this evening/tonight. Thunderstorms will
initially be possible at the onset, but should end quickly at
SGF/JLN and continue for a couple/few hours at BBG. Light surface
wind, clearing sky and quite a bit of rainfall today may lead to
some areas of dense fog overnight into Thursday morning. Clearing
should take place with VFR conditions after around 14z.

&&

.SGF WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch until midnight CDT tonight for MOZ082-088-090>098-
     101>106.

KS...NONE.
&&

SHORT TERM...Runnels
LONG TERM...Runnels
AVIATION...Lindenberg

Hazardous weather outlook, Aug 9, 8:03 PM CDT, 9 minutes before

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In the hours before

Local storm report, Aug 9, 7:33 PM CDT, 39 minutes before

Preliminary Local Storm Report
National Weather Service Springfield MO
733 PM CDT Wed Aug 9 2023

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

0720 PM     Tstm Wnd Dmg     Theodosia               36.59N 92.68W
08/09/2023                   Ozark              MO   Public

            Report from mPING: 1-inch tree limbs broken;
            Shingles blown off.

&&

TEO

Local storm report, Aug 9, 7:35 PM CDT, 37 minutes before

Preliminary Local Storm Report
National Weather Service Springfield MO
735 PM CDT Wed Aug 9 2023

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

0733 PM     Tstm Wnd Dmg     1 E Theodosia           36.58N 92.66W
08/09/2023                   Ozark              MO   Public

            Report from mPING: Trees uprooted or
            snapped; Roof blown off.

&&

TEO

Local storm report, Aug 9, 7:47 PM CDT, 25 minutes before

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Local storm report, Aug 9, 7:49 PM CDT, 23 minutes before

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Local storm report, Aug 9, 7:54 PM CDT, 18 minutes before

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Local storm report, Aug 9, 8:06 PM CDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 7:02 PM CDT	Special Weather Statement	SGF	McDonald	43 min
Aug 9, 7:09 PM CDT	Flash Flood Warning	SGF	Barry, Christian, Douglas, Stone, Taney	3 hr
Aug 9, 7:11 PM CDT	Severe Thunderstorm Warning	SGF	Ozark, Taney	49 min
Aug 9, 7:30 PM CDT	Severe Thunderstorm Warning	SGF	Barry, McDonald	45 min
Aug 9, 7:45 PM CDT	Flash Flood Warning	SGF	Ozark	2 hr
Aug 9, 7:58 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Ozark	36 min
Aug 9, 9:51 PM CDT	Areal Flood Advisory	SGF	Barry, Christian, Dade, Douglas, Greene, Howell and 7 more	12 hr
Aug 10, 12:47 AM CDT	Dense Fog Advisory	SGF	Barry, Barton, Benton, Camden, Cedar, Christian and 28 more	8 hr
Aug 10, 1:46 PM CDT	Heat Advisory	SGF	Barry, Barton, Benton, Cedar, Christian, Dade and 17 more	30 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2023 Every severe thunderstorm warning in 2023

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.