Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Apr 29, 2021, 1:49 AM CDT for Crawford County, Jefferson County, Washington County, Missouri. It was in force for 4 hr. 8 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
- Apr 29, 2021, 1:49 AM CDT (06:49 UTC)
- Expired
- Apr 29, 2021, 6:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Crawford County, MO, Jefferson County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 67 km from the middle of the area, began a volume at 06:51 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 |
|---|---|---|---|
| Apr 29, 2:15 AM CDT | FLASH FLOOD | Cuba, MO | VIADUCT NEAR THE RAILROAD TRACKS IS FLOODED, PORTIONS OF HIGHWAY 19 AND ROUTE PP ARE FLOODED BUT DEPTH OF WATER IS UNKNOWN. |
| Apr 29, 2:28 AM CDT | FLASH FLOOD | 2 Se Bourbon, MO | FLOODING ON HIGHWAY N, IMPASSABLE. |
| Apr 29, 2:30 AM CDT | FLASH FLOOD | 1 Wsw Richwoods, MO | DELAYED REPORTS FROM SOCIAL MEDIA. MANY SMALL CREEKS FLOODING. LOW WATER CROSSINGS AND ROADS FLOODED UP TO SEVERAL FEET DEEP. |
| Apr 29, 2:30 AM CDT | FLASH FLOOD | Leasburg, MO | DELAYED REPORTS FROM SOCIAL MEDIA. LOW WATER CROSSINGS AND ROADS FLOODED UP TO SEVERAL FEET DEEP. |
| Apr 29, 2:45 AM CDT | FLASH FLOOD | Fletcher, MO | DELAYED REPORTS FROM SOCIAL MEDIA. CALICO CREEK FLOODING. LOW WATER CROSSINGS AND ROADS FLOODED UP TO SEVERAL FEET DEEP INCLUDING OLD HIGHWAY H, NICKELSON ROAD, AND CALICO CREEK ROAD. |
| Apr 29, 3:00 AM CDT | FLASH FLOOD | 2 Nne De Soto, MO | DELAYED REPORTS FROM SOCIAL MEDIA. SOME ROADS FLOODED UP TO SEVERAL FEET DEEP. |
| Apr 29, 4:11 AM CDT | HEAVY RAIN 2.54 | 2 W Cuba, MO | APRSWXNET/CWOP. |
| Apr 29, 4:19 AM CDT | HEAVY RAIN 2.34 | De Soto, MO | APRSWXNET/CWOP. |
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 00:00Z, 6.8 hours before the alert went out and 296 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
- 145 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1042 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 176 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
762
WGUS53 KLSX 290649
FFWLSX
MOC055-099-221-291100-
/O.NEW.KLSX.FF.W.0001.210429T0649Z-210429T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
149 AM CDT Thu Apr 29 2021
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Crawford County in east central Missouri...
Southwestern Jefferson County in east central Missouri...
Northern Washington County in east central Missouri...
* Until 600 AM CDT.
* At 149 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 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...
Sullivan, De Soto, Cuba, Steelville, Bourbon, Anthonies Mill,
Olympian Village, Leasburg, Richwoods, St. Cloud, Oak Hill,
Fletcher and Victoria.
This includes the following State Parks...
Washington State Park, Onondaga Cave State Park and Meramec State
Park.
This includes the following highways...
Interstate 44 in Missouri between exits 203 and 218.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3821 9050 3810 9045 3807 9061 3808 9064
3806 9064 3788 9153 3821 9153
FLASH FLOOD...RADAR INDICATED
$$
Glass2 follow-up statements
671
WGUS73 KLSX 290757
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
257 AM CDT Thu Apr 29 2021
MOC055-099-221-291100-
/O.CON.KLSX.FF.W.0001.000000T0000Z-210429T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Crawford MO-Jefferson MO-Washington MO-
257 AM CDT Thu Apr 29 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 AM CDT EARLY THIS
MORNING FOR CRAWFORD, SOUTHWESTERN JEFFERSON AND NORTHERN WASHINGTON
COUNTIES IN EAST CENTRAL MISSOURI...
At 257 AM CDT, local law enforcement reported flooding in Cuba
resulting from thunderstorms producing heavy rain across the warned
area. Between 2 and 3 inches of rain have fallen across northern
Crawford and northern Washington Counties. Flash flooding is already
occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Sullivan, De Soto, Cuba, Steelville, Bourbon, Anthonies Mill,
Olympian Village, Leasburg, Richwoods, St. Cloud, Oak Hill,
Fletcher and Victoria.
This includes the following State Parks...
Washington State Park, Onondaga Cave State Park and Meramec State
Park.
This includes the following highways...
Interstate 44 in Missouri between exits 203 and 218.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3821 9050 3810 9045 3807 9061 3808 9064
3806 9064 3788 9153 3821 9153
FLASH FLOOD...OBSERVED
$$
Glass887
WGUS73 KLSX 291054
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
554 AM CDT Thu Apr 29 2021
MOC055-099-221-291104-
/O.EXP.KLSX.FF.W.0001.000000T0000Z-210429T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Crawford MO-Jefferson MO-Washington MO-
554 AM CDT Thu Apr 29 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 6 AM CDT EARLY THIS MORNING
FOR CRAWFORD, SOUTHWESTERN JEFFERSON AND NORTHERN WASHINGTON
COUNTIES IN EAST CENTRAL MISSOURI...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3821 9050 3810 9045 3807 9061 3808 9064
3806 9064 3788 9153 3821 9153
$$
GlassThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 2:27 AM CDT | Flash Flood Warning | LSX | Jefferson | 4 hr |
| Apr 29, 2:53 AM CDT | River Flood Warning | LSX | Crawford, Washington | 42 hr |
| Apr 29, 9:35 AM CDT | River Flood Warning | LSX | Lincoln | 12 hr |
| Apr 29, 9:44 AM CDT | River Flood Warning | LSX | Jefferson | 30 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.