Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 42, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Oct 24, 2021, 4:58 AM CDT for Lewis County, Marion County, Missouri; Adams County, Illinois. It was in force for 2 hr. 6 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
- Oct 24, 2021, 4:58 AM CDT (09:58 UTC)
- Expired
- Oct 24, 2021, 7:27 AM CDT
- In force
- 2 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Adams County, IL, Lewis County, MO, Marion County, MO
The radar
The St Louis radar (KLSX), 158 km from the middle of the area, began a volume at 10:01 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 |
|---|---|---|---|
| Oct 24, 5:15 AM CDT | HEAVY RAIN 2.55 | 1 W Quincy, IL | MESONET STATION UINI2 1.4 W QUINCY. |
| Oct 24, 5:15 AM CDT | HEAVY RAIN 2.55 | 1 W Quincy, IL | MESONET STATION UINI2 1.4 W QUINCY. THE PERIOD OF THE HEAVY RAIN EVENT WAS 24 HOURS. |
| Oct 24, 5:28 AM CDT | HEAVY RAIN 2.86 | 1 Sse Quincy, IL | MESONET STATION FW3305 QUINCY. |
| Oct 24, 5:28 AM CDT | HEAVY RAIN 2.86 | 1 Sse Quincy, IL | MESONET STATION FW3305 QUINCY. THE PERIOD OF THE HEAVY RAIN EVENT WAS 24 HOURS. |
| Oct 24, 5:28 AM CDT | HEAVY RAIN 3.42 | 2 Ese Quincy, IL | MESONET STATION FW7893 QUINCY. |
| Oct 24, 5:28 AM CDT | HEAVY RAIN 3.42 | 2 Ese Quincy, IL | MESONET STATION FW7893 QUINCY. THE PERIOD OF THE HEAVY RAIN EVENT WAS 24 HOURS. |
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, 10.0 hours before the alert went out and 206 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
- 1765 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 258 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
672
WGUS53 KLSX 240958
FFWLSX
ILC001-MOC111-127-241245-
/O.NEW.KLSX.FF.W.0042.211024T0958Z-211024T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
458 AM CDT Sun Oct 24 2021
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Central Adams County in west central Illinois...
Southeastern Lewis County in northeastern Missouri...
Northwestern Marion County in northeastern Missouri...
* Until 745 AM CDT.
* At 458 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
2 and 3 inches of rain have fallen, with over 1 inch in the last
hour. The expected rainfall rate is 1 to 1.5 inches in 1 hour.
Additional rainfall amounts of 1.5 to 2.5 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
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...
Quincy, Quincy Regional Airport, La Grange, Ewing, Maywood,
Philadelphia, Adams, Burton, Ursa, Liberty, Taylor, Coatsburg,
Columbus, Fowler and Paloma.
This includes the following State Parks...
Wakonda State Park.
This includes the following highways...
Interstate 172 between exits 10 and 19.
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.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3995 9177 4000 9178 4010 9113 3987 9109
3983 9175
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 1 HOUR
$$
MRB2 follow-up statements
231
WGUS73 KLSX 241118
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
618 AM CDT Sun Oct 24 2021
ILC001-MOC111-127-241245-
/O.CON.KLSX.FF.W.0042.000000T0000Z-211024T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams IL-Lewis MO-Marion MO-
618 AM CDT Sun Oct 24 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM CDT THIS
MORNING FOR CENTRAL ADAMS COUNTY IN WEST CENTRAL ILLINOIS AND
SOUTHEASTERN LEWIS AND NORTHWESTERN MARION COUNTIES IN NORTHEASTERN
MISSOURI...
At 618 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between 3
and 4 inches of rain have fallen. The expected rainfall rate is 1 to
1.5 inches in 1 hour. Additional rainfall amounts of 1.5 to 2.5
inches are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
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...
Quincy, Quincy Regional Airport, La Grange, Ewing, Maywood,
Philadelphia, Adams, Burton, Ursa, Liberty, Taylor, Coatsburg,
Columbus, Fowler and Paloma.
This includes the following State Parks...
Wakonda State Park.
This includes the following highways...
Interstate 172 between exits 10 and 19.
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.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3995 9177 4000 9178 4010 9113 3987 9109
3983 9175
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...1-1.5 INCHES IN 1 HOUR
$$
MRB339
WGUS73 KLSX 241227
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
727 AM CDT Sun Oct 24 2021
ILC001-MOC111-127-241237-
/O.CAN.KLSX.FF.W.0042.000000T0000Z-211024T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams IL-Lewis MO-Marion MO-
727 AM CDT Sun Oct 24 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL ADAMS COUNTY IN WEST
CENTRAL ILLINOIS AND SOUTHEASTERN LEWIS AND NORTHWESTERN MARION
COUNTIES IN NORTHEASTERN MISSOURI...
The heaviest rain has ended. Light rain will continue through the
morning, but flooding is no longer expected to pose a threat. Please
continue to heed remaining road closures.
LAT...LON 3995 9177 4000 9178 4010 9113 3987 9109
3983 9175
$$
BSHThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 24, 4:17 AM CDT | Areal Flood Advisory | LSX | Knox, Lewis, Marion, Shelby | 6 hr |
| Oct 24, 9:49 AM CDT | River Flood Warning | LSX | Marion | 23 hr |
| Oct 24, 4:49 PM CDT | Severe Thunderstorm Warning | LSX | Pike, Ralls | 41 min |
| Oct 24, 5:03 PM CDT | River Flood Warning | LSX | Marion | 38 hr |
| Oct 24, 5:17 PM CDT | Tornado Warning | LSX | Pike | 43 min |
| Oct 24, 5:27 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Moniteau | 48 min |
| Oct 24, 6:36 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Montgomery, Ralls | 39 min |
| Oct 24, 6:37 PM CDT | Severe Thunderstorm Warning | LSX | Callaway | 38 min |
| Oct 24, 4:03 PM CDT | Flash Flood Warning | LSX | Adams, Brown | 4 hr |
| Oct 24, 5:14 PM CDT | Flash Flood Warning | LSX | Brown, Pike | 4 hr |
Nearby
Flash Flood Warnings in Missouri, 2021Flash Flood Warnings in Illinois, 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.