Alert archive / Missouri / Flash Flood Watches in 2019

Flash Flood Watch 18, NWS Springfield, MO

August 21, 201917 counties in Missouri; Bourbon County, Cherokee County, Crawford County, Kansas

NWS Springfield, MO issued this flash flood watch at Aug 21, 2019, 2:55 PM CDT for 17 counties in Missouri; Bourbon County, Cherokee County, Crawford County, Kansas. It took effect at Aug 21, 2019, 7:00 PM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Aug 21, 2019, 2:55 PM CDT (19:55 UTC)
In effect from
Aug 21, 2019, 7:00 PM CDT
Expired
Aug 22, 2019, 10:00 AM CDT
In force
15 hr
Issued by
NWS Springfield, MO
Flood severity
None

Counties Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Maries County, MO, Miller County, MO, Morgan County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Springfield radar (KSGF), 63 km from the middle of the area, began a volume at 19:57 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.9 hours before the alert went out and 105 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2019-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1626 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2019-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1626 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
1382 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Aug 21, 12:26 PM CDT, 2 hours 29 minutes earlier.

Area forecast discussion, Aug 21, 12:26 PM CDT, 2 hours 29 minutes before
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Hazardous weather outlook, Aug 21, 2:54 PM CDT, 1 minute before
Hazardous Weather Outlook
National Weather Service Springfield MO
254 PM CDT Wed Aug 21 2019

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-222000-
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-
254 PM CDT Wed Aug 21 2019

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

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

  Limited hail risk.
  Limited thunderstorm wind damage risk.
  Limited flooding risk.
  Limited lightning risk.
  Elevated to locally Significant excessive heat risk.

DISCUSSION...

Heat index values of 95 to 105 degrees will continue into early
this evening outside of thunderstorms.

Scattered thunderstorms will develop through early evening across
southern Missouri. Additional thunderstorms will develop this
evening across southeast Kansas and central Missouri, with those
storms continuing overnight while gradually shifting south.

Hail to the size of half dollars and locally damaging wind gusts
will be possible with a few storms. Frequent lightning and heavy
rainfall can also be expected with these storms. The heaviest
rainfall will occur tonight from southeastern Kansas into central
Missouri where there is an elevated risk for flash flooding.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Multiple rounds of showers and thunderstorms will continue through
Friday night and possibly into Saturday. A limited risk for severe
storms will continue into Thursday. An elevated flash flooding
risk will persist into Thursday morning from southeastern Kansas
into central Missouri.

A slight chance for thunderstorms will then continue through the
remainder of the weekend with better chances for storms returning
next Monday and Tuesday.

.SPOTTER INFORMATION STATEMENT...

 Spotter activation will not be needed through tonight.

&&

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

Schaumann

In the hours before

Special weather statement, Aug 21, 2:40 PM CDT, 15 minutes before
Special Weather Statement
National Weather Service Springfield MO
240 PM CDT Wed Aug 21 2019

MOZ098-106-212030-
Oregon MO-Shannon MO-
240 PM CDT Wed Aug 21 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL SHANNON AND NORTH
CENTRAL OREGON COUNTIES UNTIL 330 PM CDT...

At 240 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Winona, or 19 miles southwest of Van Buren, moving
east at 5 mph.

Half inch hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Winona...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3681 9140 3694 9149 3702 9128 3687 9122
      3686 9122
TIME...MOT...LOC 1940Z 286DEG 5KT 3690 9134

Wise

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 7:01 PM CDTHeat AdvisorySGFBarry, Christian, Douglas, Howell, McDonald, Newton and 5 more25 hr
Aug 21, 2:40 PM CDTSpecial Weather StatementSGFOregon50 min
Aug 21, 4:08 PM CDTSpecial Weather StatementSGFStone37 min
Aug 21, 5:30 PM CDTAreal Flood AdvisorySGFOregon, Shannon4 hr
Aug 21, 5:37 PM CDTAreal Flood AdvisorySGFBarry, Stone4 hr
Aug 21, 6:05 PM CDTFlash Flood WarningSGFHowell, Oregon, Shannon6 hr
Aug 21, 6:45 PM CDTSpecial Weather StatementSGFDent45 min

Nearby

Flash Flood Watches in Missouri, 2019Flash Flood Watches in Kansas, 2019Every flash flood watch 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.