Alert archive / Missouri / Flash Flood Warnings in 2026
Flash Flood Warning 3, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Apr 16, 2026, 4:50 PM CDT for 5 counties in Missouri. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 16, 2026, 4:50 PM CDT (21:50 UTC)
- Expired
- Apr 16, 2026, 7:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO, Osage County, MO
The radar
The St Louis radar (KLSX), 139 km from the middle of the area, began a volume at 21:52 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.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 222 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
- 79 J/kg
- Mixed-layer CIN
- -186 J/kg
- Mixed-layer LCL
- 1183 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 215 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
751
WGUS53 KLSX 162150
FFWLSX
MOC019-027-051-135-151-170045-
/O.NEW.KLSX.FF.W.0003.260416T2150Z-260417T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
450 PM CDT Thu Apr 16 2026
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Southern Boone County in central Missouri...
Southwestern Callaway County in central Missouri...
Cole County in central Missouri...
Southeastern Moniteau County in central Missouri...
Western Osage County in central Missouri...
* Until 745 PM CDT.
* At 450 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 inches of rain
have fallen. Additional rainfall amounts up 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 indicated.
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...
Jefferson City, Wardsville, St. Martins, Russellville, Brazito,
Hickory Hill, Lohman, Eugene, Elston and Enon.
This includes the following State Parks...
Jefferson Landing Historic Site.
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 3843 9250 3858 9245 3865 9227 3864 9221
3860 9220 3858 9217 3856 9212 3856 9205
3847 9215 3847 9217 3846 9216 3842 9221
3833 9224 3834 9229 3834 9241 3843 9240
FLASH FLOOD...RADAR INDICATED
$$
Gosselin1 follow-up statement
220
WGUS73 KLSX 170042
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
742 PM CDT Thu Apr 16 2026
MOC019-027-051-135-151-170052-
/O.EXP.KLSX.FF.W.0003.000000T0000Z-260417T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Boone MO-Callaway MO-Cole MO-Moniteau MO-Osage MO-
742 PM CDT Thu Apr 16 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM CDT THIS EVENING FOR
SOUTHERN BOONE, SOUTHWESTERN CALLAWAY, COLE, SOUTHEASTERN MONITEAU
AND WESTERN OSAGE COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 3843 9250 3858 9245 3865 9227 3864 9221
3860 9220 3858 9217 3856 9212 3856 9205
3847 9215 3847 9217 3846 9216 3842 9221
3833 9224 3834 9229 3834 9241 3843 9240
$$
GosselinThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 8:46 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade, Osage | 44 min |
| Apr 15, 9:02 PM CDT | Areal Flood Advisory | LSX | Crawford, Franklin, Gasconade | 6 hr |
| Apr 15, 9:03 PM CDT | Tornado Warning | LSX | Crawford, Franklin, Gasconade | 28 min |
| Apr 15, 9:40 PM CDT | Tornado Warning | LSX | Saint Louis, City of Saint Louis | 43 min |
| Apr 15, 10:15 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Saint Louis, City of Saint Louis | 21 min |
| Apr 15, 10:24 PM CDT | Areal Flood Advisory | LSX | Saint Louis, City of Saint Louis | 97 min |
| Apr 16, 12:37 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds | 53 min |
| Apr 16, 3:02 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 33 min |
| Apr 16, 4:22 PM CDT | Areal Flood Advisory | LSX | Cole | 28 min |
| Apr 16, 4:37 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 38 min |
| Apr 16, 5:09 PM CDT | Severe Thunderstorm Warning | LSX | Cole | 38 min |
Nearby
Flash Flood Warnings in Missouri, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.