Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 6, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 19, 2021, 8:42 PM CDT for Audrain County, Boone County, Monroe County, Missouri. It was in force for 6 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
- Jun 19, 2021, 8:42 PM CDT (01:42 UTC)
- Expired
- Jun 20, 2021, 2:13 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Audrain County, MO, Boone County, MO, Monroe County, MO
The radar
The St Louis radar (KLSX), 124 km from the middle of the area, began a volume at 01:44 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 |
|---|---|---|---|
| Jun 19, 10:05 PM CDT | FLASH FLOOD | Centralia, MO | SEVERAL ROADS IN CENTRALIA FLOODED. |
| Jun 19, 10:15 PM CDT | FLASH FLOOD | 4 Wnw Hallsville, MO | WATER OVER THE ROADWAY ALONG TUCKER SCHOOL ROAD ALONG HIGHWAY 124. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.7 hours before the alert went out and 292 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2652 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
329
WGUS53 KLSX 200142
FFWLSX
MOC007-019-137-200745-
/O.NEW.KLSX.FF.W.0006.210620T0142Z-210620T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
842 PM CDT Sat Jun 19 2021
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Northeastern Boone County in central Missouri...
Audrain County in central Missouri...
Southwestern Monroe County in northeastern Missouri...
* Until 245 AM CDT Sunday.
* At 841 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to three inches of rain have
already fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flooding include...
Mexico, Centralia, Hallsville, Sturgeon, Laddonia, Farber,
Martinsburg, Rush Hill, Benton City, Vandiver and Thompson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3925 9243 3925 9231 3944 9231 3934 9172
3932 9172 3932 9163 3931 9155 3915 9161
3915 9163 3906 9164 3906 9179 3916 9248
FLASH FLOOD...RADAR INDICATED
$$
KD2 follow-up statements
286
WGUS73 KLSX 200307
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
1007 PM CDT Sat Jun 19 2021
MOC007-019-137-200745-
/O.CON.KLSX.FF.W.0006.000000T0000Z-210620T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Audrain MO-Monroe MO-
1007 PM CDT Sat Jun 19 2021
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM CDT SUNDAY
FOR NORTHEASTERN BOONE...AUDRAIN AND SOUTHWESTERN MONROE COUNTIES...
At 1006 PM CDT, the public reported thunderstorms producing heavy
rain in Centralia. Three to four inches of rain have already fallen
and light to moderate rainfall continues.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Public.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Some locations that will experience flooding include...
Mexico, Centralia, Hallsville, Sturgeon, Laddonia, Farber,
Martinsburg, Rush Hill, Benton City, Vandiver and Thompson.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3925 9243 3925 9231 3944 9231 3934 9172
3932 9172 3932 9163 3931 9155 3915 9161
3915 9163 3906 9164 3906 9179 3916 9248
FLASH FLOOD...OBSERVED
$$
KD059
WGUS73 KLSX 200713
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
213 AM CDT Sun Jun 20 2021
MOC007-019-137-200723-
/O.CAN.KLSX.FF.W.0006.000000T0000Z-210620T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Audrain MO-Boone MO-Monroe MO-
213 AM CDT Sun Jun 20 2021
...FLASH FLOOD WARNING FOR AUDRAIN AND NORTHEASTERN BOONE COUNTIES
IN CENTRAL MISSOURI AND SOUTHWESTERN MONROE COUNTY IN NORTHEASTERN
MISSOURI HAS BEEN REPLACED WITH A FLOOD WARNING...
The heavy rain has ended. Please continue to heed remaining road
closures.
LAT...LON 3925 9243 3925 9231 3944 9231 3934 9172
3932 9172 3932 9163 3931 9155 3915 9161
3915 9163 3906 9164 3906 9179 3916 9248
$$
MRMThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:12 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 48 min |
| Jun 19, 7:31 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 44 min |
| Jun 19, 8:00 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Saint Charles, Saint Louis | 21 min |
| Jun 19, 9:33 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 42 min |
| Jun 19, 11:49 PM CDT | Areal Flood Warning | LSX | Marion, Pike, Ralls | 11 hr |
| Jun 20, 1:39 AM CDT | Flash Flood Warning | LSX | Boone | 5 hr |
| Jun 20, 2:13 AM CDT | Areal Flood Warning | LSX | Audrain, Boone, Monroe | 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.