Alert archive / Missouri / Flash Flood Warnings in 2020

Flash Flood Warning 16, NWS St. Louis, MO

June 3, 20205 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 3, 2020, 9:28 PM CDT for 5 counties in Missouri. It was in force for 7 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
Jun 3, 2020, 9:28 PM CDT (02:28 UTC)
Expired
Jun 4, 2020, 4:30 AM CDT
In force
7 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Audrain County, MO, Marion County, MO, Monroe County, MO, Ralls County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 134 km from the middle of the area, began a volume at 02:29 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

TimeReportWhereRemark
Jun 3, 11:49 PM CDTFLASH FLOOD1 S Paris, MODISPATCH REPORTS WATER STILL OVER HIGHWAY 15 SOUTH OF PARIS.

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 00:00Z, 2.5 hours before the alert went out and 256 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.

Skew-T log-pSkew-T log-p diagram, Davenport, at 00:00Z on 2020-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1126 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2020-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1126 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1114 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

865 
WGUS53 KLSX 040228
FFWLSX
MOC007-127-137-173-205-040530-
/O.NEW.KLSX.FF.W.0016.200604T0228Z-200604T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
928 PM CDT Wed Jun 3 2020

The National Weather Service in St Louis has issued a

* Flash Flood Warning for...
  Ralls County in northeastern Missouri...
  Northwestern Audrain County in central Missouri...
  Southern Marion County in northeastern Missouri...
  Southern Shelby County in northeastern Missouri...
  Monroe County in northeastern Missouri...

* Until 1230 AM CDT.

* At 927 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. 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...
  Hannibal, Monroe City, Shelbina, Paris, Santa Fe, New London,
  Perry, Madison, Center, Rensselaer, Spaulding, Maud, Woodlawn,
  Granville, Hunnewell, Holliday, Stoutsville, The Landing, Florida
  and Duncans Bridge.

This also includes Union Covered Bridge Historic Site and Mark Twain
Lake Recreational Area.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3972 9230 3972 9137 3950 9137 3945 9146
      3932 9144 3934 9231

FLASH FLOOD...RADAR INDICATED

$$

CVKING
1 follow-up statement
722 
WGUS53 KLSX 040527
FFWLSX
MOC007-127-137-173-205-040930-
/O.EXT.KLSX.FF.W.0016.000000T0000Z-200604T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
1227 AM CDT Thu Jun 4 2020

The National Weather Service in St Louis has extended the

* Flash Flood Warning for...
  Ralls County in northeastern Missouri...
  Northwestern Audrain County in central Missouri...
  Southern Marion County in northeastern Missouri...
  Southern Shelby County in northeastern Missouri...
  Monroe County in northeastern Missouri...

* Until 430 AM CDT.

* At 1219 AM CDT, Flooding was occurring across portions of the 
  warned area due to heavy rainfall from thunderstorms on Wednesday 
  evening. Water was reported over several roads including Highway 
  15 south of Paris. Radar estimates that 3 to 5 inches of rain has 
  fallen across portions of northern Ralls County and southern 
  Monroe County.

  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...
  Hannibal, Monroe City, Shelbina, Paris, Santa Fe, New London,
  Perry, Madison, Center, Rensselaer, Spaulding, Maud, Woodlawn,
  Granville, Hunnewell, Holliday, Stoutsville, The Landing, Florida
  and Duncans Bridge.

This also includes Union Covered Bridge Historic Site and Mark Twain
Lake Recreational Area.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3972 9230 3972 9137 3950 9137 3945 9146
      3932 9144 3934 9231

FLASH FLOOD...RADAR INDICATED

$$

Glass

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 3, 7:23 PM CDTSevere Thunderstorm WarningLSXMarion, Monroe, Ralls52 min
Jun 3, 7:34 PM CDTSevere Thunderstorm WarningLSXAudrain, Callaway, Montgomery41 min
Jun 3, 7:44 PM CDTSevere Thunderstorm WarningLSXBoone, Callaway46 min
Jun 3, 7:48 PM CDTFlash Flood WarningLSXMarion3 hr
Jun 3, 8:06 PM CDTFlash Flood WarningLSXAudrain, Boone, Callaway3 hr
Jun 3, 8:13 PM CDTSevere Thunderstorm WarningLSXMarion, Ralls, Shelby30 min
Jun 3, 8:56 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Callaway49 min
Jun 3, 9:03 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone42 min
Jun 3, 9:49 PM CDTFlash Flood WarningLSXAudrain, Boone6 hr
Jun 3, 10:30 PM CDTFlash Flood WarningLSXMarion6 hr
Jun 3, 10:39 PM CDTSevere Thunderstorm WarningLSXAudrain, Boone, Callaway33 min
Jun 3, 10:45 PM CDTFlash Flood WarningLSXAudrain, Boone, Callaway5 hr
Jun 4, 12:27 AM CDTRiver Flood WarningLSXMarion11 hr
Jun 4, 3:44 AM CDTAreal Flood WarningLSXAudrain, Callaway6 hr
Jun 4, 7:26 AM CDTRiver Flood WarningLSXMonroe4 hr
Jun 4, 11:09 AM CDTRiver Flood WarningLSXCallaway, Osage8 days
Jun 4, 11:09 AM CDTRiver Flood WarningLSXGasconade, Montgomery8 days
Jun 4, 11:21 AM CDTRiver Flood WarningLSXLewis9 days
Jun 4, 11:21 AM CDTRiver Flood WarningLSXRalls24 hr
Jun 4, 2:14 PM CDTRiver Flood WarningLSXOsage7 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.