Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 74, NWS Springfield, MO
NWS Springfield, MO issued this flash flood warning at Jul 17, 2021, 4:50 PM CDT for St. Clair County, Missouri. It was in force for 7 hr. 2 reports 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, 4:50 PM CDT (21:50 UTC)
- Expired
- Jul 17, 2021, 11:45 PM CDT
- In force
- 7 hr
- Issued by
- NWS Springfield, MO
- Area
- Storm-based polygon
- Flood severity
- None
County St. Clair County, MO
The radar
The Springfield radar (KSGF), 83 km from the middle of the area, began a volume at 21:51 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, 5:46 PM CDT | FLASH FLOOD | 4 S Vista, MO | CORRECTS PREVIOUS FLASH FLOOD REPORT FROM 4 S VISTA. VIA SOCIAL MEDIA. REPORT THAT WATER WAS 2 FEET OVER SE 601 RD COLLINS BY COON CREEK BUT THE BRIDGE WAS NOT UNDER. AT 653 PM WAS ADVISED THE BRIDGE WAS UNDER WATER AT THE SAME LOCATION. |
| Jul 17, 5:46 PM CDT | FLASH FLOOD | 4 S Vista, MO | VIA SOCIAL MEDIA. REPORT THAT WATER WAS 2 FEET OVER SE 601 RD COLLINS BY COON CREEK BUT THE BRIDGE WASN’T UNDER. AT 653 PM WAS ADVISED THE BRIDGE WAS UNDER WATER AT THE SAME LOCATION. |
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 12:00Z, 9.8 hours before the alert went out and 118 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
- 1277 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 784 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
492
WGUS53 KSGF 172150
FFWSGF
MOC185-180445-
/O.NEW.KSGF.FF.W.0074.210717T2150Z-210718T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
450 PM CDT Sat Jul 17 2021
The National Weather Service in Springfield has issued a
* Flash Flood Warning for...
Southeastern St. Clair County in west central Missouri...
* Until 1145 PM CDT Saturday.
* At 450 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 4 inches of rain
have fallen across the Coon Creek, Weaubleau Creek Salt Creek, and
Monegaw Creek basins. Additional rainfall amounts up to 1 inch 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...
Osceola, Collins, Roscoe, Vista, Gerster, Monegaw Springs and
Truman Lake.
This includes the following low water crossings...
Brush Creek at 1200 Road and Weaubleau Creek at 350 Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Many flood
deaths occur in vehicles.
&&
LAT...LON 3783 9357 3783 9371 3793 9387 3805 9392
3810 9384 3809 9372 3808 9362 3798 9356
3794 9352 3792 9354 3792 9356 3791 9357
FLASH FLOOD...RADAR INDICATED
$$
DC1 follow-up statement
210
WGUS73 KSGF 180234
FFSSGF
Flash Flood Statement
National Weather Service Springfield MO
934 PM CDT Sat Jul 17 2021
MOC185-180445-
/O.CON.KSGF.FF.W.0074.000000T0000Z-210718T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Clair MO-
934 PM CDT Sat Jul 17 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT THIS
EVENING FOR SOUTHEASTERN ST. CLAIR COUNTY...
At 934 PM CDT, Law enforcement reported flooding in areas across the
warned area. Between 1 and 4 inches of rain have fallen across the
Coon Creek, Weaubleau Creek, Brush Creek, and Monegaw Creek basins.
The rain has ended, however, residual flooding will continue.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Osceola, Collins, Roscoe, Vista, Gerster, Monegaw Springs and
Truman Lake.
This includes the following low water crossings...
Brush Creek at 1200 Road and Weaubleau Creek at 350 Road.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Many flood
deaths occur in vehicles.
&&
LAT...LON 3783 9357 3783 9371 3793 9387 3805 9392
3810 9384 3809 9372 3808 9362 3798 9356
3794 9352 3792 9354 3792 9356 3791 9357
FLASH FLOOD...RADAR INDICATED
$$
DCThe office that day
Everything else NWS Springfield, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 3:21 PM CDT | Flash Flood Warning | SGF | Greene | 110 min |
| Jul 17, 4:00 PM CDT | Areal Flood Advisory | SGF | Polk, St. Clair, Vernon | 4 hr |
| Jul 17, 4:24 PM CDT | Flash Flood Warning | SGF | Douglas | 7 hr |
| Jul 17, 4:41 PM CDT | Flash Flood Warning | SGF | Polk | 7 hr |
| Jul 17, 5:21 PM CDT | Flash Flood Warning | SGF | Hickory, Polk | 6 hr |
| Jul 17, 5:46 PM CDT | Flash Flood Warning | SGF | Dallas, Polk | 6 hr |
| Jul 17, 6:16 PM CDT | Severe Thunderstorm Warning | SGF | Greene | 30 min |
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.