Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 36, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Aug 10, 2021, 3:38 AM CDT for Reynolds 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 outline as issued.
The facts
- Issued
- Aug 10, 2021, 3:38 AM CDT (08:38 UTC)
- Expired
- Aug 10, 2021, 6:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
County Reynolds County, MO
The radar
The St Louis radar (KLSX), 175 km from the middle of the area, began a volume at 08:38 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, 8.6 hours before the alert went out and 259 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
- 3719 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1477 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
703
WGUS53 KLSX 100838
FFWLSX
MOC179-101130-
/O.NEW.KLSX.FF.W.0036.210810T0838Z-210810T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
338 AM CDT Tue Aug 10 2021
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Southeastern Reynolds County in southeastern Missouri...
* Until 630 AM CDT.
* At 338 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 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...
Garwood.
This includes the following State Parks...
Clearwater Lake Recreational Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3719 9103 3719 9074 3717 9074 3717 9076
3714 9076 3714 9078 3705 9078 3705 9096
3710 9096 3710 9101 3710 9102 3714 9102
3714 9104
FLASH FLOOD...RADAR INDICATED
$$
Carney1 follow-up statement
555
WGUS73 KLSX 101127
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
627 AM CDT Tue Aug 10 2021
MOC179-101137-
/O.EXP.KLSX.FF.W.0036.000000T0000Z-210810T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Reynolds MO-
627 AM CDT Tue Aug 10 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 630 AM CDT THIS MORNING FOR
SOUTHEASTERN REYNOLDS COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3719 9103 3719 9074 3717 9074 3717 9076
3714 9076 3714 9078 3705 9078 3705 9096
3710 9096 3710 9101 3710 9102 3714 9102
3714 9104
$$
CarneyThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:20 AM CDT | Excessive Heat Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 65 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.