Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 21, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 30, 2021, 5:20 PM CDT for Marion County, Missouri; Adams County, Illinois. It was in force for 2 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
- Jun 30, 2021, 5:20 PM CDT (22:20 UTC)
- Expired
- Jun 30, 2021, 7:45 PM CDT
- In force
- 2 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Adams County, IL, Marion County, MO
The radar
The St Louis radar (KLSX), 139 km from the middle of the area, began a volume at 22:19 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 30, 5:30 PM CDT | FLASH FLOOD | 4 Ne Marblehead, IL | SEVERAL FACEBOOK POSTS IN A LOCAL COMMUNITY PAGE SHOW PICTURES OF MOVING WATER COVERING THE INTERSECTION OF HWY 96 AND ST. ANTHONY RD. FROM VIDEO, WATER IS MOVING RAPIDLY ACROSS ROADS AND INTO TWO CREEKS NEAR THE INTERSECTION. THE CREEKS DID NOT APPEAR TO BE O |
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 12:00Z, 10.3 hours before the alert went out and 203 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
- 377 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted.
681
WGUS53 KLSX 302220
FFWLSX
ILC001-MOC127-010045-
/O.NEW.KLSX.FF.W.0021.210630T2220Z-210701T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
520 PM CDT Wed Jun 30 2021
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Southern Adams County in west central Illinois...
East Central Marion County in northeastern Missouri...
* Until 745 PM CDT.
* At 520 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1.5 and 2.5 inches of rain have fallen. The expected rainfall rate
is 0.5 to 1 inch in 1 hour. Additional rainfall amounts of 1 to 2
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, Payson, Fall Creek, Beverly,
Adams, Kingston, Burton, Liberty, Richfield, Plainville, Columbus,
Marblehead and Kellerville.
This includes the following State Parks...
Siloam Springs State Park.
This includes the following highways...
Interstate 172 between exits 2 and 15.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3984 9143 3998 9130 3999 9108 3998 9092
3976 9092 3976 9153
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR
$$
MRB2 follow-up statements
217
WGUS73 KLSX 302328
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
628 PM CDT Wed Jun 30 2021
ILC001-MOC127-010045-
/O.CON.KLSX.FF.W.0021.000000T0000Z-210701T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams IL-Marion MO-
628 PM CDT Wed Jun 30 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT THIS
EVENING FOR SOUTHERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS AND EAST
CENTRAL MARION COUNTY IN NORTHEASTERN MISSOURI...
At 628 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1.5 and 2.5 inches of rain have fallen. The expected rainfall rate
is 0.5 to 1 inch in 1 hour. Additional rainfall amounts of 0.5 to 1
inch 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, Payson, Fall Creek, Beverly,
Adams, Kingston, Burton, Liberty, Richfield, Plainville, Columbus,
Marblehead and Kellerville.
This includes the following State Parks...
Siloam Springs State Park.
This includes the following highways...
Interstate 172 between exits 2 and 15.
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.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
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 3984 9143 3998 9130 3999 9108 3998 9092
3976 9092 3976 9153
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR
$$
MRB979
WGUS73 KLSX 010038
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
738 PM CDT Wed Jun 30 2021
ILC001-MOC127-010048-
/O.EXP.KLSX.FF.W.0021.000000T0000Z-210701T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams IL-Marion MO-
738 PM CDT Wed Jun 30 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM CDT THIS EVENING FOR
SOUTHERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS AND EAST CENTRAL
MARION COUNTY IN NORTHEASTERN MISSOURI...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3984 9143 3998 9130 3999 9108 3998 9092
3976 9092 3976 9153
$$
MRBThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:41 PM CDT | River Flood Warning | LSX | Lewis | 30 hr |
| Jun 30, 3:30 AM CDT | Flash Flood Watch | LSX | Audrain, Boone, Callaway, Cole, Crawford, Franklin and 8 more | 33 hr |
| Jun 30, 5:15 AM CDT | Areal Flood Advisory | LSX | Boone, Moniteau | 3 hr |
| Jun 30, 5:44 AM CDT | River Flood Warning | LSX | Lincoln | 49 hr |
| Jun 30, 5:59 AM CDT | Areal Flood Advisory | LSX | Boone, Callaway | 3 hr |
| Jun 30, 7:01 AM CDT | Areal Flood Advisory | LSX | Montgomery | 3 hr |
| Jun 30, 7:49 AM CDT | Areal Flood Advisory | LSX | Lincoln, Montgomery, Warren | 3 hr |
| Jun 30, 4:03 PM CDT | Areal Flood Advisory | LSX | Lewis, Marion | 3 hr |
| Jun 30, 4:34 PM CDT | Areal Flood Advisory | LSX | Marion | 46 min |
| Jun 30, 6:00 PM CDT | River Flood Warning | LSX | Marion | 22 hr |
| Jun 30, 6:00 PM CDT | River Flood Warning | LSX | Marion | 19 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.