Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 29, NWS Springfield, MO
NWS Springfield, MO issued this flash flood warning at May 17, 2021, 7:03 PM CDT for Greene County, Polk County, Missouri. It was in force for 6 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
- May 17, 2021, 7:03 PM CDT (00:03 UTC)
- Expired
- May 18, 2021, 1:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS Springfield, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Greene County, MO, Polk County, MO
The radar
The Springfield radar (KSGF), 30 km from the middle of the area, began a volume at 00:07 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 |
|---|---|---|---|
| May 17, 8:07 PM CDT | FLASH FLOOD | 1 Wsw Eudora, MO | EXCESSIVE RAIN CAUSED TURKEY CREEK TO FLOOD HIGHWAY W. OBSERVED BY MISSOURI HIGHWAY PATROL. |
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, 0.1 hours before the alert went out and 67 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.
- Mixed-layer CAPE
- 371 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 501 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 211 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
022
WGUS53 KSGF 180003
FFWSGF
MOC077-167-180600-
/O.NEW.KSGF.FF.W.0029.210518T0003Z-210518T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
703 PM CDT Mon May 17 2021
The National Weather Service in Springfield has issued a
* Flash Flood Warning for...
Northwestern Greene County in southwestern Missouri...
Southwestern Polk County in southwestern Missouri...
* Until 100 AM CDT.
* At 703 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. 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...
Ash Grove, Walnut Grove, Morrisville, Aldrich, Eudora, Sacville,
Cave Springs and Stockton Lake.
This includes the following low water crossings...
Route W at Turkey Creek just west of Eudora, Farm Road 68 at The
Sac River west of Ash Grove and Farm Road 22 at Asher Creek 6
miles east of Walnut Grove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3753 9362 3754 9362 3755 9362 3756 9362
3755 9341 3742 9337 3733 9348 3728 9362
3740 9362
FLASH FLOOD...RADAR INDICATED
$$
MB2 follow-up statements
257
WGUS73 KSGF 180240
FFSSGF
Flash Flood Statement
National Weather Service Springfield MO
940 PM CDT Mon May 17 2021
MOC077-167-180600-
/O.CON.KSGF.FF.W.0029.000000T0000Z-210518T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Greene MO-Polk MO-
940 PM CDT Mon May 17 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1 AM CDT TUESDAY FOR
NORTHWESTERN GREENE AND SOUTHWESTERN POLK COUNTIES...
At 940 PM CDT, Local law enforcement reported thunderstorms
producing heavy rain across the warned area with flash flooding
occurring along Turkey Creek. Between 2 and 4 inches of rain have
fallen. Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Ash Grove, Walnut Grove, Morrisville, Aldrich, Eudora, Sacville,
Cave Springs and Stockton Lake.
This includes the following low water crossings...
Route W at Turkey Creek just west of Eudora, Farm Road 68 at The
Sac River west of Ash Grove and Farm Road 22 at Asher Creek 6
miles east of Walnut Grove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3753 9362 3754 9362 3755 9362 3756 9362
3755 9341 3742 9337 3733 9348 3728 9362
3740 9362
FLASH FLOOD...OBSERVED
$$
MB501
WGUS73 KSGF 180556
FFSSGF
Flash Flood Statement
National Weather Service Springfield MO
1256 AM CDT Tue May 18 2021
MOC077-167-180606-
/O.EXP.KSGF.FF.W.0029.000000T0000Z-210518T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Greene MO-Polk MO-
1256 AM CDT Tue May 18 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 1 AM CDT EARLY THIS MORNING
FOR NORTHWESTERN GREENE AND SOUTHWESTERN POLK COUNTIES...
The heavy rain has ended. The Flash Flood Warning has been replaced
by a Flood Warning. Please continue to heed remaining road closures.
LAT...LON 3753 9362 3754 9362 3755 9362 3756 9362
3755 9341 3742 9337 3733 9348 3728 9362
3740 9362
$$
JTThe office that day
Everything else NWS Springfield, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 8:35 PM CDT | Flash Flood Warning | SGF | Barry, Christian, Lawrence, Stone | 6 hr |
| May 17, 9:00 PM CDT | Flash Flood Warning | SGF | Greene, Polk | 4 hr |
| May 17, 9:59 PM CDT | River Flood Warning | SGF | Cedar | 27 hr |
| May 17, 10:10 PM CDT | Flash Flood Warning | SGF | Lawrence | 6 hr |
| May 17, 10:58 PM CDT | Flash Flood Warning | SGF | Barry, Lawrence | 6 hr |
| May 18, 12:53 AM CDT | Areal Flood Warning | SGF | Greene, Polk | 12 hr |
| May 18, 2:21 AM CDT | Areal Flood Warning | SGF | Barry, Christian, Lawrence, Stone | 12 hr |
| May 18, 3:01 AM CDT | River Flood Warning | SGF | St. Clair | 5 days |
| May 18, 4:55 AM CDT | Areal Flood Warning | SGF | Dade | 8 hr |
| May 18, 7:34 AM CDT | River Flood Warning | SGF | Cedar | 7 hr |
| May 18, 5:16 PM CDT | River Flood Warning | SGF | Vernon | 40 hr |
Nearby
Flash Flood Warnings in Missouri, 2021Every 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.