Alert archive / Missouri / Flash Flood Warnings in 2020
Flash Flood Warning 46, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 30, 2020, 8:52 PM CDT for Cole County, Osage County, Missouri. It was in force for 4 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
- Jul 30, 2020, 8:52 PM CDT (01:52 UTC)
- Expired
- Jul 31, 2020, 12:45 AM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cole County, MO, Osage County, MO
The radar
The St Louis radar (KLSX), 143 km from the middle of the area, began a volume at 01:53 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 |
|---|---|---|---|
| Jul 30, 10:00 PM CDT | FLOOD | 3 W Brazito, MO | PUBLIC WORKS REPORTS WATER ON SEVERAL ROADS IN THE WEST PART OF BRAZITO. DEPTH OF WATER IS UNKNOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 1.9 hours before the alert went out and 213 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
- 1022 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted.
392
WGUS53 KLSX 310152
FFWLSX
MOC051-151-310545-
/O.NEW.KLSX.FF.W.0046.200731T0152Z-200731T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
852 PM CDT Thu Jul 30 2020
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Southern Cole County in central Missouri...
Southwestern Osage County in central Missouri...
* Until 1245 AM CDT.
* At 851 PM CDT, Doppler radar and automated gauges indicated
thunderstorms producing heavy rain across the warned area. An
automated rainfall gauge near Brazito indicated over 3 inches of
raiin has occurred since 700 pm. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flooding include...
Wardsville, Russellville, Westphalia, St. Thomas, Brazito, Hickory
Hill, Meta, Lohman, Eugene, Koeltztown and Osage Bend.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
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.
&&
LAT...LON 3858 9245 3845 9200 3829 9205 3829 9219
3834 9220 3834 9222 3833 9223 3832 9225
3834 9229 3834 9241 3842 9241 3843 9249
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
Glass2 follow-up statements
996
WGUS73 KLSX 310343
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
1043 PM CDT Thu Jul 30 2020
MOC051-151-310545-
/O.CON.KLSX.FF.W.0046.000000T0000Z-200731T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cole MO-Osage MO-
1043 PM CDT Thu Jul 30 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR
SOUTHERN COLE AND SOUTHWESTERN OSAGE COUNTIES...
At 1040 PM CDT, Doppler radar and automated gauges indicated that 2
to 4 inches of rain fell across portions of southern Cole into
southwest Osage County this evening. While the rainfall has ended,
runoff from the heavy rain could produce flooding across the warned
area.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Some locations that will experience flooding include...
Wardsville, Russellville, Westphalia, St. Thomas, Brazito, Hickory
Hill, Meta, Lohman, Eugene, Koeltztown and Osage Bend.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3858 9245 3845 9200 3829 9205 3829 9219
3834 9220 3834 9222 3833 9223 3832 9225
3834 9229 3834 9241 3842 9241 3843 9249
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
Glass260
WGUS73 KLSX 310545
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
1245 AM CDT Fri Jul 31 2020
MOC051-151-310554-
/O.EXP.KLSX.FF.W.0046.000000T0000Z-200731T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cole MO-Osage MO-
1245 AM CDT Fri Jul 31 2020
...THE FLASH FLOOD WARNING FOR SOUTHERN COLE AND SOUTHWESTERN OSAGE
COUNTIES WILL EXPIRE AT 1245 AM CDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 3858 9245 3845 9200 3829 9205 3829 9219
3834 9220 3834 9222 3833 9223 3832 9225
3834 9229 3834 9241 3842 9241 3843 9249
$$
MRMThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 3:25 AM CDT | Flash Flood Watch | LSX | Crawford, Franklin, Iron, Jefferson, Lincoln, Madison and 8 more | 21 hr |
| Jul 31, 7:28 AM CDT | Areal Flood Advisory | LSX | Boone, Callaway, Cole, Gasconade, Moniteau, Montgomery and 1 more | 3 hr |
| Jul 31, 8:33 AM CDT | Flash Flood Warning | LSX | Gasconade | 6 hr |
| Jul 31, 11:31 AM CDT | Areal Flood Advisory | LSX | Franklin, Gasconade, Montgomery, Warren | 3 hr |
| Jul 31, 12:10 PM CDT | Flash Flood Warning | LSX | Franklin, Gasconade, Montgomery, Warren | 6 hr |
| Jul 31, 1:19 PM CDT | Flash Flood Warning | LSX | Franklin, Gasconade, Warren | 6 hr |
| Jul 31, 4:18 PM CDT | Flash Flood Warning | LSX | Iron, Reynolds | 5 hr |
| Jul 31, 4:29 PM CDT | Areal Flood Advisory | LSX | Saint Charles | 3 hr |
Nearby
Flash Flood Warnings in Missouri, 2020Every flash flood warning in 2020
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.