Alert archive / Missouri / Flash Flood Warnings in 2020
Flash Flood Warning 43, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 27, 2020, 8:02 AM CDT for Lincoln County, Warren 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 27, 2020, 8:02 AM CDT (13:02 UTC)
- Expired
- Jul 27, 2020, 12:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Lincoln County, MO, Warren County, MO
The radar
The St Louis radar (KLSX), 33 km from the middle of the area, began a volume at 13:03 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 27, 8:50 AM CDT | FLASH FLOOD | 4 S Cave, MO | WATER OVER ROUTE 47 IN SPOTS WITH SOME LOCATIONS BARELY PASSABLE. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 1.0 hours before the alert went out and 244 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
- 277 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1099 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
101
WGUS53 KLSX 271302
FFWLSX
MOC113-219-271700-
/O.NEW.KLSX.FF.W.0043.200727T1302Z-200727T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
802 AM CDT Mon Jul 27 2020
The National Weather Service in St Louis has issued a
* Flash Flood Warning for...
Southwestern Lincoln County in east central Missouri...
Northeastern Warren County in east central Missouri...
* Until noon CDT.
* At 800 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Radar estimates that in excess
of 3 inches of rain has fallen since 500 am. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
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...
Troy, Warrenton, Wright City, Moscow Mills, Hawk Point, Fountain N'
Lakes, Flint Hill, Foristell, Truxton and Cave.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3901 9083 3888 9083 3888 9086 3889 9087
3888 9089 3889 9090 3889 9096 3883 9096
3884 9126 3902 9126
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
Glass2 follow-up statements
589
WGUS73 KLSX 271512
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
1012 AM CDT Mon Jul 27 2020
MOC113-219-271700-
/O.CON.KLSX.FF.W.0043.000000T0000Z-200727T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln MO-Warren MO-
1012 AM CDT Mon Jul 27 2020
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON CDT FOR
SOUTHWESTERN LINCOLN AND NORTHEASTERN WARREN COUNTIES...
At 1008 AM CDT, emergency management reported flooding on Highway 47
near Linns Mill Road, around 3 miles west of Troy. Radar estimates
as much as 4 inches of rain has fallen across parts of southwest
Lincoln County.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other drainage
and low lying areas.
Some locations that will experience flooding include...
Troy, Warrenton, Wright City, Moscow Mills, Hawk Point, Fountain N'
Lakes, Flint Hill, Foristell, Truxton and Cave.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3901 9083 3888 9083 3888 9086 3889 9087
3888 9089 3889 9090 3889 9096 3883 9096
3884 9126 3902 9126
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...LESS THAN A HALF INCH THROUGH NOON.
$$
Glass494
WGUS73 KLSX 271652
FFSLSX
Flash Flood Statement
National Weather Service St Louis MO
1152 AM CDT Mon Jul 27 2020
MOC113-219-271701-
/O.EXP.KLSX.FF.W.0043.000000T0000Z-200727T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lincoln MO-Warren MO-
1152 AM CDT Mon Jul 27 2020
...THE FLASH FLOOD WARNING FOR SOUTHWESTERN LINCOLN AND NORTHEASTERN
WARREN COUNTIES WILL EXPIRE AT NOON CDT...
The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed any
remaining road closures.
LAT...LON 3901 9083 3888 9083 3888 9086 3889 9087
3888 9089 3889 9090 3889 9096 3883 9096
3884 9126 3902 9126
$$
GlassThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 6:34 AM CDT | Areal Flood Advisory | LSX | Franklin, Gasconade, Lincoln, Montgomery, Osage, Saint Charles and 1 more | 4 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.