Alert archive / Missouri / Flash Flood Warnings in 2023
Flash Flood Warning 21, NWS Kansas City, MO
NWS Kansas City, MO issued this flash flood warning at Aug 11, 2023, 11:10 PM CDT for Gentry County, Harrison County, Worth 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
- Aug 11, 2023, 11:10 PM CDT (04:10 UTC)
- Expired
- Aug 12, 2023, 4:50 AM CDT
- In force
- 6 hr
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Gentry County, MO, Harrison County, MO, Worth County, MO
The radar
The Des Moines radar (KDMX), 153 km from the middle of the area, began a volume at 04:12 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, 1:09 AM CDT | FLASH FLOOD | 6 N Martinsville, MO | Harrison County Sheriffs Office reports water over Highway M in northeastern Harrison County, west of Eagleville. |
| Aug 12, 1:40 AM CDT | FLASH FLOOD | 3 N Ridgeway, MO | Missouri State Highway Patrol reports water over roadway at Route DD and Highway T north of Ridgeway, MO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 4.2 hours before the alert went out and 200 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
- 3508 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1886 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 14.2
The text
As transmitted.
035
WGUS53 KEAX 120410
FFWEAX
MOC075-081-227-121015-
/O.NEW.KEAX.FF.W.0021.230812T0410Z-230812T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Kansas City/Pleasant Hill MO
1110 PM CDT Fri Aug 11 2023
The National Weather Service in Pleasant Hill MO has issued a
* Flash Flood Warning for...
Harrison County in north central Missouri...
Northeastern Gentry County in northwestern Missouri...
Worth County in northwestern Missouri...
* Until 515 AM CDT Saturday.
* At 1110 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 3 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 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...
Bethany, Albany, Grant City, Ridgeway, Gilman City, Eagleville,
New Hampton, Cainsville, Irena, Blythedale, Mount Moriah,
Allendale, Denver, Martinsville and Hatfield.
This includes the following highways...
Interstate 35 in Missouri between mile markers 84 and 114.
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 4057 9454 4058 9379 4014 9376 4015 9427
FLASH FLOOD...RADAR INDICATED
$$
731 follow-up statement
946 WGUS73 KEAX 120950 FFSEAX Flash Flood Statement National Weather Service Kansas City/Pleasant Hill MO 450 AM CDT Sat Aug 12 2023 MOC075-081-227-121000- /O.CAN.KEAX.FF.W.0021.000000T0000Z-230812T1015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Gentry MO-Harrison MO-Worth MO- 450 AM CDT Sat Aug 12 2023 ...FLASH FLOOD WARNING FOR HARRISON, NORTHEASTERN GENTRY AND WORTH COUNTIES HAS BEEN REPLACED WITH A FLOOD WARNING... LAT...LON 4057 9454 4058 9379 4014 9376 4015 9427 $$ 73
The office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 9:14 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, Grundy, Harrison, Mercer | 46 min |
| Aug 11, 9:24 PM CDT | Severe Thunderstorm Warning | EAX | Gentry, Harrison, Worth | 36 min |
| Aug 11, 9:48 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, DeKalb, Gentry, Harrison | 42 min |
| Aug 11, 9:51 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, Grundy, Harrison, Livingston | 39 min |
| Aug 11, 9:57 PM CDT | Special Weather Statement | EAX | Adair, Putnam, Sullivan | 48 min |
| Aug 11, 10:25 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, Grundy, Linn, Livingston | 50 min |
| Aug 11, 10:28 PM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Daviess, DeKalb, Grundy | 47 min |
| Aug 11, 10:34 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Putnam, Schuyler, Sullivan | 41 min |
| Aug 11, 10:36 PM CDT | Special Weather Statement | EAX | Harrison | 39 min |
| Aug 11, 10:42 PM CDT | Special Weather Statement | EAX | Linn | 48 min |
| Aug 11, 10:50 PM CDT | Severe Thunderstorm Warning | EAX | Daviess, Grundy, Harrison, Mercer | 25 min |
| Aug 11, 11:09 PM CDT | Special Weather Statement | EAX | Mercer | 51 min |
| Aug 11, 11:13 PM CDT | Severe Thunderstorm Warning | EAX | Chariton, Grundy, Linn, Livingston | 47 min |
| Aug 11, 11:15 PM CDT | Tornado Warning | EAX | Adair, Linn, Macon, Sullivan | 15 min |
| Aug 11, 11:19 PM CDT | Severe Thunderstorm Warning | EAX | Grundy, Harrison, Mercer | 41 min |
| Aug 11, 11:22 PM CDT | Special Weather Statement | EAX | Adair | 23 min |
| Aug 11, 11:28 PM CDT | Tornado Warning | EAX | Adair, Linn, Sullivan | 11 min |
| Aug 11, 11:56 PM CDT | Special Weather Statement | EAX | Linn | 49 min |
| Aug 11, 11:58 PM CDT | Special Weather Statement | EAX | Sullivan | 47 min |
| Aug 12, 12:07 AM CDT | Special Weather Statement | EAX | Harrison, Worth | 38 min |
| Aug 12, 12:08 AM CDT | Flash Flood Warning | EAX | Adair, Daviess, Grundy, Harrison, Linn, Livingston and 4 more | 6 hr |
| Aug 12, 12:10 AM CDT | Severe Thunderstorm Warning | EAX | Grundy, Linn, Sullivan | 35 min |
| Aug 12, 12:12 AM CDT | Special Weather Statement | EAX | Macon | 33 min |
| Aug 12, 12:30 AM CDT | Severe Thunderstorm Warning | EAX | Grundy, Linn, Livingston, Sullivan | 30 min |
| Aug 12, 12:37 AM CDT | Severe Thunderstorm Warning | EAX | Gentry, Harrison, Worth | 38 min |
| Aug 12, 12:54 AM CDT | Severe Thunderstorm Warning | EAX | Linn | 36 min |
| Aug 12, 1:11 AM CDT | Severe Thunderstorm Warning | EAX | Daviess, Gentry, Harrison, Worth | 34 min |
| Aug 12, 1:17 AM CDT | Severe Thunderstorm Warning | EAX | Chariton, Linn, Macon | 43 min |
| Aug 12, 1:51 AM CDT | Severe Thunderstorm Warning | EAX | Chariton, Linn, Macon, Randolph | 39 min |
| Aug 12, 2:25 AM CDT | Severe Thunderstorm Warning | EAX | Chariton, Howard, Randolph | 35 min |
| Aug 12, 3:07 AM CDT | Areal Flood Advisory | EAX | Chariton, Linn, Macon, Randolph | 6 hr |
| Aug 12, 4:50 AM CDT | Areal Flood Warning | EAX | Gentry, Harrison, Worth | 6 hr |
| Aug 12, 5:11 AM CDT | Special Weather Statement | EAX | Bates, Henry, Johnson | 49 min |
| Aug 12, 5:44 AM CDT | Areal Flood Warning | EAX | Adair, Daviess, Grundy, Harrison, Linn, Livingston and 4 more | 5 hr |
| Aug 12, 8:55 AM CDT | River Flood Warning | EAX | Daviess, Livingston | 19 hr |
Nearby
Flash Flood Warnings in Missouri, 2023Every flash flood warning in 2023
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.