Alert archive / Missouri / Flash Flood Warnings in 2021

Flash Flood Warning 79, NWS Springfield, MO

July 17, 2021Barry County, Missouri

NWS Springfield, MO issued this flash flood warning at Jul 17, 2021, 9:08 PM CDT for Barry County, Missouri. It was in force for 7 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 17, 2021, 9:08 PM CDT (02:08 UTC)
Expired: Jul 18, 2021, 4:00 AM CDT
In force: 7 hr
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Flood severity: None

County Barry County, MO

The radar

The Springfield radar (KSGF), 77 km from the middle of the area, began a volume at 02:08 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.

What was reported inside it

Time	Report	Where	Remark
Jul 17, 10:00 PM CDT	FLASH FLOOD	1 Se Washburn, MO	EXCESSIVE RAINFALL CAUSED FLOODING OVER A SECTION OF HIGHWAY 37 NEAR WASHBURN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.1 hours before the alert went out and 28 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: 346 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -60 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

184 
WGUS53 KSGF 180208
FFWSGF
MOC009-180900-
/O.NEW.KSGF.FF.W.0079.210718T0208Z-210718T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
908 PM CDT Sat Jul 17 2021

The National Weather Service in Springfield has issued a

* Flash Flood Warning for...
  Western Barry County in southwestern Missouri...

* Until 400 AM CDT Sunday.

* At 908 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 2 inches of rain have 
  fallen across the upper headwaters of the Flat Creek and Dry 
  Hollow Creek basins. Additional rainfall amounts of 1 to 2 inches 
  are possible in the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Cassville, Seligman, Washburn, Wayne and Mcdowell.

Flash Flooding will also be possible at Roaring River State Park if 
heavy rain continues to fall in the Dry Hollow Creek Basin.

This includes the following low water crossings...
  Flat Creek at Highway U, Flat Creek at Highway C and Flat Creek at 
  Highway Y.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Many flood 
deaths occur in vehicles.

&&

LAT...LON 3650 9394 3653 9393 3661 9398 3665 9397
      3666 9392 3674 9386 3681 9382 3684 9379
      3682 9377 3675 9380 3672 9382 3666 9385
      3665 9382 3663 9380 3661 9381 3657 9376
      3655 9377 3650 9380

FLASH FLOOD...RADAR INDICATED

$$

DC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:15 PM CDT	Severe Thunderstorm Warning	SGF	Newton	45 min
Jul 17, 7:23 PM CDT	Severe Thunderstorm Warning	SGF	Newton	52 min
Jul 17, 7:46 PM CDT	Flash Flood Warning	SGF	Barry, Lawrence, Newton	7 hr
Jul 17, 8:22 PM CDT	Flash Flood Warning	SGF	Barry, McDonald	6 hr
Jul 18, 2:17 AM CDT	Areal Flood Warning	SGF	Barry, Lawrence, McDonald, Newton	10 hr
Jul 18, 9:51 AM CDT	River Flood Warning	SGF	Bates, Vernon	21 days

Nearby

Flash Flood Warnings in Missouri, 2021 Every flash flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.