Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 27, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 12, 2021, 2:14 PM CDT for Lincoln County, Montgomery County, Missouri. It was in force for 4 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 12, 2021, 2:14 PM CDT (19:14 UTC)
- Expired
- Jul 12, 2021, 6:15 PM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Lincoln County, MO, Montgomery County, MO
The radar
The St Louis radar (KLSX), 58 km from the middle of the area, began a volume at 19:14 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 12, 3:00 PM CDT | FLASH FLOOD | Olney, MO | WATER COVERING THE ROAD TO AN UNKNOWN DEPTH AT THE INTERSECTION OF HWY E AND O JUST NORTH OF OLNEY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 7.2 hours before the alert went out and 256 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
- 653 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 548 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
304
WGUS53 KLSX 121914
FFWLSX
MOC113-139-122315-
/O.NEW.KLSX.FF.W.0027.210712T1914Z-210712T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
214 PM CDT Mon Jul 12 2021
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
West Central Lincoln County in east central Missouri...
Northeastern Montgomery County in east central Missouri...
* Until 615 PM CDT.
* At 214 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 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...
Bellflower, Truxton, Cave and Olney.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3898 9126 3898 9135 3914 9134 3913 9109
3901 9098 3898 9113 3899 9119 3899 9126
FLASH FLOOD...RADAR INDICATED
$$
Carney2 follow-up statements
466
WGUS73 KLSX 122027
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
327 PM CDT Mon Jul 12 2021
MOC113-139-122315-
/O.CON.KLSX.FF.W.0027.000000T0000Z-210712T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln MO-Montgomery MO-
327 PM CDT Mon Jul 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM CDT THIS
EVENING FOR WEST CENTRAL LINCOLN AND NORTHEASTERN MONTGOMERY
COUNTIES IN EAST CENTRAL MISSOURI...
At 327 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 4 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, highways,
streets and underpasses as well as other poor drainage
and low-lying areas.
Some locations that will experience flash flooding include...
Bellflower, Truxton, Cave and Olney.
This includes the following streams and drainages...
Lead Creek, Big Lead Creek, Buck Creek, Camp Creek, Town Branch,
Little Lead Creek, Parsons Branch, Cuivre River, Wolf Creek,
Cottonwood Branch and West Fork Cuivre River.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 3898 9126 3898 9135 3914 9134 3913 9109
3901 9098 3898 9113 3899 9119 3899 9126
FLASH FLOOD...RADAR INDICATED
$$
Carney342
WGUS73 KLSX 122311
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
611 PM CDT Mon Jul 12 2021
MOC113-139-122321-
/O.EXP.KLSX.FF.W.0027.000000T0000Z-210712T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln MO-Montgomery MO-
611 PM CDT Mon Jul 12 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 615 PM CDT THIS EVENING FOR
WEST CENTRAL LINCOLN AND NORTHEASTERN MONTGOMERY COUNTIES IN EAST
CENTRAL MISSOURI...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3898 9126 3898 9135 3914 9134 3913 9109
3901 9098 3898 9113 3899 9119 3899 9126
$$
BrittThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 8:05 PM CDT | River Flood Warning | LSX | Lewis | 58 hr |
| Jul 12, 1:42 AM CDT | Areal Flood Advisory | LSX | Franklin | 5 hr |
| Jul 12, 3:46 AM CDT | Areal Flood Advisory | LSX | Warren | 40 min |
| Jul 12, 4:26 AM CDT | Flash Flood Warning | LSX | Warren | 4 hr |
| Jul 12, 5:09 AM CDT | Flash Flood Warning | LSX | Saint Charles | 4 hr |
| Jul 12, 5:56 AM CDT | Areal Flood Advisory | LSX | Callaway, Gasconade, Osage | 5 hr |
| Jul 12, 1:12 PM CDT | Areal Flood Advisory | LSX | Lincoln | 3 hr |
| Jul 12, 6:27 PM CDT | Areal Flood Advisory | LSX | Pike | 3 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.