Alert archive / Missouri / Flash Flood Warnings in 2019

Flash Flood Warning 109, NWS Springfield, MO

August 30, 2019Benton County, Missouri

NWS Springfield, MO issued this flash flood warning at Aug 30, 2019, 5:38 AM CDT for Benton County, Missouri. It was in force for 3 hr. 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 30, 2019, 5:38 AM CDT (10:38 UTC)
Expired: Aug 30, 2019, 8:55 AM CDT
In force: 3 hr
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Flood severity: None

County Benton County, MO

The radar

The Pleasant Hill radar (KEAX), 102 km from the middle of the area, began a volume at 10:40 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 10.6 hours before the alert went out and 162 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: 2204 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1393 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Aug 30, 1:33 AM CDT, 4 hours 5 minutes earlier.

Area forecast discussion, Aug 30, 1:33 AM CDT, 4 hours 5 minutes before

Area Forecast Discussion
National Weather Service Springfield MO
133 AM CDT Fri Aug 30 2019

.SHORT TERM...(Today and tonight)
Issued at 103 AM CDT Fri Aug 30 2019

A rather expansive area of showers and storms was moving across
eastern Kansas as another areas of showers and storms was sliding
very slowly to the southwest across central Missouri. These two
system will continue to move south and will impact mainly areas
along and west of Highway 65 through this morning.

A frontal boundary was responsible for the convection over
Missouri while an upper level short wave and the nose of a low
level jet were allowing linear MCS to continue across eastern
Kansas.

The latest indications showed a weakening trend in the storms
however, rainfall rates continued to be 1-2 inches per hour
especially for central Missouri where storm movement is less than
5 mph. Precipitable water reading were from 1.9 to 2.1 across the
northern half of the Ozarks which was helping to fuel the heavy
rainfall. As a result of the expected rainfall and placement of
storms through this afternoon the ongoing Flash Flood Watch will
be expanded eastward.

Where the front and the MCS were meeting near Topeka, Kansas is
what looks like an MCV developing. This feature will move to the
southeast and across western Missouri and the Ozarks through
today.

All of this points to a wet and connectively active day for most
of the Ozarks. The potential for severe storms will be marginal
through a few severe cells will be possible as the MVC moves
towards and into the Southeastern Kansas and locations west of
Interstate 49. The primary concern for severe weather will be
focused on damaging wind gusts up to 70 mph.

The MCV will have drifted east of the region as the an upper level
trough drops into the Boot Heel region. The front will stall near
the Arkansas State line however and bring the potential for
additional rainfall overnight tonight

.LONG TERM...(Saturday through Thursday)
Issued at 103 AM CDT Fri Aug 30 2019

Scattered showers and storms will continue through the weekend as
the the front remains across the region, though it does begin to
wash out, and a few short waves move across plains and into the
Ozarks. A few showers may linger into Monday but most areas
should be dry.

Models have another quick moving front that may bring some light
rain to the area for the middle of the week, but consensus on
this occurring is not very good. In general, much of next week
will be seasonable and mainly dry.

&&

.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 1213 AM CDT Fri Aug 30 2019

High clouds will continue to filter in from both the north and
west tonight ahead of an approaching complex of thunderstorms.
Flight conditions will gradually deteriorate between 06-12z with
the onset of storms. Heavy rain and lower visibility will produce
MVFR to IFR conditions during this time, with the worst conditions
likely near the JLN terminal.

Surface winds, while generally south at 10 kts tonight, will
likely veer to the north or northwest sometime between 06-12z with
the arrival of a gust front. There could be some low- level wind
shear near the JLN terminal as a 20-30 kt low- level jet noses
into extreme southwest Missouri overnight.

Between 12-18z, lingering low clouds and rain showers will
produce pockets of MVFR ceilings. Surface winds during this time
will be light and variable as an MCV slowly moves from west to
east across the region.

Look for flight conditions to gradually improve across all
terminals from 18z- 06z as clouds begin to break behind a
departing mid-level shortwave. Some low-level cloudiness could
linger, however, into late Friday night.

&&

.SGF WATCHES/WARNINGS/ADVISORIES...
MO...Flash Flood Watch until 1 PM CDT this afternoon for MOZ066-077-
     088-093-101.

KS...Flash Flood Watch until 1 PM CDT this afternoon for KSZ073-097-
     101.

&&

SHORT TERM...Hatch
LONG TERM...Hatch
AVIATION...Albano

Hazardous weather outlook, Aug 30, 5:38 AM CDT, 0 minutes before

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In the hours before

Special weather statement, Aug 30, 3:38 AM CDT, 2 hours before

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Local storm report, Aug 30, 5:00 AM CDT, 38 minutes before

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Local storm report, Aug 30, 5:04 AM CDT, 34 minutes before

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Special weather statement, Aug 30, 5:15 AM CDT, 23 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 29, 7:21 PM CDT	Special Weather Statement	SGF	Morgan	39 min
Aug 29, 7:54 PM CDT	Special Weather Statement	SGF	Benton, Morgan	51 min
Aug 29, 8:44 PM CDT	Special Weather Statement	SGF	Greene	46 min
Aug 29, 8:59 PM CDT	River Flood Warning	SGF	Bates, Vernon	7 days
Aug 29, 11:20 PM CDT	Flash Flood Warning	SGF	Camden, Dallas	6 hr
Aug 30, 2:54 AM CDT	Flash Flood Warning	SGF	Benton, Cedar, St. Clair, Vernon	6 hr
Aug 30, 3:22 AM CDT	Severe Thunderstorm Warning	SGF	Vernon	38 min
Aug 30, 3:38 AM CDT	Special Weather Statement	SGF	Barton, Jasper, Newton	67 min
Aug 30, 5:15 AM CDT	Special Weather Statement	SGF	Benton	30 min
Aug 30, 5:57 AM CDT	Special Weather Statement	SGF	Morgan	48 min
Aug 30, 6:31 AM CDT	Special Weather Statement	SGF	Camden, Miller, Morgan	29 min
Aug 30, 9:02 AM CDT	Areal Flood Warning	SGF	Benton	9 hr
Aug 30, 6:25 PM CDT	Special Weather Statement	SGF	Dent	50 min
Aug 30, 2:43 AM CDT	Severe Thunderstorm Warning	SGF	Bourbon, Cherokee, Crawford	62 min

Nearby

Flash Flood Warnings in Missouri, 2019 Every flash flood warning in 2019

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.