Alert archive / Missouri / Flash Flood Warnings in 2021
Flash Flood Warning 13, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Aug 12, 2021, 10:32 AM CDT for Clark County, Scotland County, Missouri; Lee County, Van Buren County, Iowa. It was in force for 6 hr. 4 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
- Aug 12, 2021, 10:32 AM CDT (15:32 UTC)
- Expired
- Aug 12, 2021, 4:30 PM CDT
- In force
- 6 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Lee County, IA, Van Buren County, IA, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 147 km from the middle of the area, began a volume at 15:33 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 |
|---|---|---|---|
| Aug 12, 11:07 AM CDT | HEAVY RAIN 1.96 | 1 Ssw Keosauqua, IA | RAWS STATION. |
| Aug 12, 11:10 AM CDT | HEAVY RAIN 1 | 3 Ese Keosauqua, IA | RAINFALL SINCE 915 AM THIS MORNING. |
| Aug 12, 12:07 PM CDT | HEAVY RAIN 2.2 | 1 Ne Farmington, IA | RAIN TOTAL TODAY THROUGH NOON, IFC RAIN GAUGE. |
| Aug 12, 12:40 PM CDT | HEAVY RAIN 1.51 | Cantril, IA | RAIN FELL IN PAST 2 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 12:00Z, 3.5 hours before the alert went out and 152 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
- 2463 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
269
WGUS53 KDVN 121532
FFWDVN
IAC111-177-MOC045-199-122130-
/O.NEW.KDVN.FF.W.0013.210812T1532Z-210812T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Quad Cities IA IL
1032 AM CDT Thu Aug 12 2021
The National Weather Service in Quad Cities has issued a
* Flash Flood Warning for...
Southern Lee County in southeastern Iowa...
Southern Van Buren County in southeastern Iowa...
Northern Clark County in northeastern Missouri...
Northeastern Scotland County in northeastern Missouri...
* Until 430 PM CDT.
* At 1032 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 1 to 3 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin within the next hour.
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...
Fort Madison, Keokuk, Kahoka, Memphis, Nauvoo, Keosauqua,
Hamilton, Warsaw, Dallas City, Donnellson, Montrose, Wayland,
Milton, Bonaparte, Cantril, Alexandria, Franklin, Luray, Granger
and Croton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 4075 9218 4065 9116 4063 9130 4060 9136
4055 9141 4050 9136 4044 9138 4040 9137
4036 9145 4044 9194 4042 9218
FLASH FLOOD...RADAR INDICATED
$$
Gross3 follow-up statements
489
WGUS73 KDVN 121658
FFSDVN
Flash Flood Statement
National Weather Service Quad Cities IA IL
1158 AM CDT Thu Aug 12 2021
IAC111-177-MOC045-199-122130-
/O.CON.KDVN.FF.W.0013.000000T0000Z-210812T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lee IA-Van Buren IA-Clark MO-Scotland MO-
1158 AM CDT Thu Aug 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM CDT THIS
AFTERNOON FOR SOUTHERN LEE, SOUTHERN VAN BUREN, NORTHERN CLARK AND
NORTHEASTERN SCOTLAND COUNTIES...
At 1158 AM CDT, A trained weather spotter reported two inches in
northern Clark county in the past three hours. Flash flooding is
ongoing or expected to begin shortly. Additional 1 to 2 inches is
expected in the next 2 hours.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Trained spotters reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Fort Madison, Keokuk, Kahoka, Memphis, Nauvoo, Keosauqua,
Hamilton, Warsaw, Dallas City, Donnellson, Montrose, Wayland,
Milton, Bonaparte, Cantril, Alexandria, Franklin, Luray, Granger
and Croton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4075 9218 4065 9116 4063 9130 4060 9136
4055 9141 4050 9136 4044 9138 4040 9137
4036 9145 4044 9194 4042 9218
FLASH FLOOD...OBSERVED
$$
Gross957
WGUS73 KDVN 122107
FFSDVN
Flash Flood Statement
National Weather Service Quad Cities IA IL
407 PM CDT Thu Aug 12 2021
IAC111-177-122117-
/O.CAN.KDVN.FF.W.0013.000000T0000Z-210812T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lee IA-Van Buren IA-
407 PM CDT Thu Aug 12 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN LEE AND SOUTHERN
VAN BUREN COUNTIES...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
A Flash Flood Watch remains in effect until 700 AM CDT Friday for
portions of west central Illinois, southeast Iowa and northeast
Missouri.
LAT...LON 4042 9218 4060 9218 4061 9173 4058 9169
4056 9169 4054 9162 4051 9162 4047 9158
4046 9153 4044 9153 4043 9152 4041 9152
4040 9149 4038 9148 4039 9146 4038 9146
4039 9144 4038 9142 4036 9145 4044 9194
$$
MOC045-199-122130-
/O.CON.KDVN.FF.W.0013.000000T0000Z-210812T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark MO-Scotland MO-
407 PM CDT Thu Aug 12 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM CDT THIS
AFTERNOON FOR NORTHERN CLARK AND NORTHEASTERN SCOTLAND COUNTIES...
At 407 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 5 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Keokuk, Kahoka, Memphis, Wayland, Alexandria, Luray, Granger, St.
Francisville, Revere, Arbela, Chambersburg, Ashton, Heath Memorial
Conservation Area, Medill, Anson, Prospect Grove, Peaksville,
Azen, Clark County Fairgrounds and Battle of Athens Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 4042 9218 4060 9218 4061 9173 4058 9169
4056 9169 4054 9162 4051 9162 4047 9158
4046 9153 4044 9153 4043 9152 4041 9152
4040 9149 4038 9148 4039 9146 4038 9146
4039 9144 4038 9142 4036 9145 4044 9194
FLASH FLOOD...RADAR INDICATED
$$
Uttech311
WGUS73 KDVN 122126
FFSDVN
Flash Flood Statement
National Weather Service Quad Cities IA IL
426 PM CDT Thu Aug 12 2021
MOC045-199-122136-
/O.EXP.KDVN.FF.W.0013.000000T0000Z-210812T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clark MO-Scotland MO-
426 PM CDT Thu Aug 12 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 430 PM CDT THIS AFTERNOON FOR
NORTHERN CLARK AND NORTHEASTERN SCOTLAND COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 700 AM CDT Friday for
portions of west central Illinois, southeast Iowa and northeast
Missouri.
LAT...LON 4042 9218 4060 9218 4061 9173 4058 9169
4056 9169 4054 9162 4051 9162 4047 9158
4046 9153 4044 9153 4043 9152 4041 9152
4040 9149 4038 9148 4039 9146 4038 9146
4039 9144 4038 9142 4036 9145 4044 9194
$$
UttechThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 2:57 AM CDT | Heat Advisory | DVN | Clark, Scotland | 8 hr |
| Aug 12, 8:35 AM CDT | Special Weather Statement | DVN | Scotland | 25 min |
| Aug 12, 9:54 AM CDT | Special Weather Statement | DVN | Clark | 96 min |
| Aug 12, 11:29 AM CDT | Special Weather Statement | DVN | Clark, Scotland | 91 min |
| Aug 12, 12:44 PM CDT | Flash Flood Watch | DVN | Clark, Scotland | 8 hr |
| Aug 12, 12:55 PM CDT | Special Weather Statement | DVN | Clark, Scotland | 95 min |
| Aug 12, 2:29 PM CDT | Flash Flood Warning | DVN | Scotland | 4 hr |
| Aug 12, 2:09 AM CDT | Special Weather Statement | DVN | Lee | 21 min |
| Aug 12, 7:24 AM CDT | Special Weather Statement | DVN | Van Buren | 36 min |
| Aug 12, 7:26 AM CDT | Severe Thunderstorm Warning | DVN | Van Buren | 33 min |
| Aug 12, 9:10 AM CDT | Special Weather Statement | DVN | Van Buren | 50 min |
| Aug 12, 9:23 AM CDT | Flash Flood Warning | DVN | Van Buren | 4 hr |
Nearby
Flash Flood Warnings in Missouri, 2021Flash Flood Warnings in Iowa, 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.