Alert archive / Missouri / Flash Flood Warnings in 2021

Flash Flood Warning 9, NWS St. Louis, MO

June 25, 2021Audrain County, Boone County, Callaway County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 25, 2021, 4:04 AM CDT for Audrain County, Boone County, Callaway County, Missouri. It was in force for 6 hr. 22 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: Jun 25, 2021, 4:04 AM CDT (09:04 UTC)
Expired: Jun 25, 2021, 10:00 AM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Audrain County, MO, Boone County, MO, Callaway County, MO

The radar

The St Louis radar (KLSX), 146 km from the middle of the area, began a volume at 09:02 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
Jun 25, 5:15 AM CDT	FLASH FLOOD	4 Nw Columbia, MO	SEVERAL FEET OF WATER OVER ROADWAY NEAR INTERSECTION OF ROEMER ROAD AND WEST OBERMILLER ROAD.
Jun 25, 6:03 AM CDT	FLASH FLOOD	3 Nnw Columbia, MO	FIRE RESPONDING TO VEHICLE IN FLOODED ROADWAY. CREASY SPRINGS AND BEAR CREEK.
Jun 25, 6:18 AM CDT	FLASH FLOOD	4 Ne Columbia, MO	FLASH FLOODING OF HINKSON CREEK. PARTIES TRAPPED IN HOUSE WITH FLOOD WATERS SURROUNDING THE RESIDENCE.
Jun 25, 6:24 AM CDT	FLASH FLOOD	4 Nnw Columbia, MO	WATER RESCUE: TWO VEHICLES TRAPPED IN FLASH FLOOD WATERS OVER THE ROAD NEAR INTERSECTION OF ROEMER AND BLACKFOOT.
Jun 25, 6:41 AM CDT	FLASH FLOOD	Midway, MO	MODOT HAS CLOSED US-40 DUE TO HIGH WATER AND FLASH FLOODING.
Jun 25, 6:56 AM CDT	FLASH FLOOD	3 Ese Midway, MO	ROAD CLOSED DUE TO FLOODING: STRAWN AT WORLEY.
Jun 25, 6:57 AM CDT	HEAVY RAIN 6	5 N Midway, MO	COCORAHS STATION MO-BN-20 HARRISBURG 5.9 SSE.
Jun 25, 7:00 AM CDT	HEAVY RAIN 2.65	2 Wnw Mexico, MO	CO-OP OBSERVER STATION MEXM7 1.7 W MEXICO.
Jun 25, 7:00 AM CDT	HEAVY RAIN 3	3 Ssw Mexico, MO	COCORAHS STATION MO-FSA-007 MEXICO 3.3 SSW.
Jun 25, 7:00 AM CDT	HEAVY RAIN 3.99	1 Ene Hallsville, MO	COCORAHS STATION MO-BN-74 HALLSVILLE 0.5 ENE.
Jun 25, 7:00 AM CDT	HEAVY RAIN 5.32	3 Wnw Columbia, MO	COCORAHS STATION MO-BN-1 COLUMBIA 3.4 WNW.
Jun 25, 7:02 AM CDT	FLASH FLOOD	6 Se Harrisburg, MO	ROAD WASHED OUT NEAR 525 BLOCK OF WEST DRIPPING SPRINGS ROAD DUE TO FLASH FLOODING OF SILVER FORK CREEK.
Jun 25, 7:30 AM CDT	FLASH FLOOD	2 Wnw Murry, MO	SPIVA CROSSING ROAD AND PHILLIPS ROAD CLOSED DUE TO FLASH FLOODING OF HINKSON CREEK.
Jun 25, 7:31 AM CDT	HEAVY RAIN 2.54	Mexico, MO	MESONET STATION DW9110 MEXICO.
Jun 25, 7:46 AM CDT	HEAVY RAIN 2.56	Mexico, MO	MESONET STATION DW9110 MEXICO.
Jun 25, 7:49 AM CDT	HEAVY RAIN 3.13	Auxvasse, MO	MESONET STATION AV640 AUXVASSE.
Jun 25, 7:58 AM CDT	FLASH FLOOD	3 Ene Midway, MO	MODOT HAS CLOSED ROUTE E DUE TO FLASH FLOODING ALONG PERCHE CREEK.
Jun 25, 7:59 AM CDT	FLASH FLOOD	3 Ese Midway, MO	MODOT HAS CLOSED ROUTE ZZ DUE TO FLASH FLOODING OF HARMONY CREEK.
Jun 25, 8:00 AM CDT	HEAVY RAIN 2.96	2 N Centralia, MO	COCORAHS STATION MO-BN-70 CENTRALIA 1.5 N.
Jun 25, 8:02 AM CDT	HEAVY RAIN 2.58	Mexico, MO	MESONET STATION DW9110 MEXICO.
Jun 25, 8:04 AM CDT	HEAVY RAIN 3.13	Auxvasse, MO	MESONET STATION AV640 AUXVASSE.
Jun 25, 8:20 AM CDT	HEAVY RAIN 3.17	Auxvasse, MO	MESONET STATION AV640 AUXVASSE.

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, 9.1 hours before the alert went out and 273 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2954 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1147 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 324 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

053 
WGUS53 KLSX 250904
FFWLSX
MOC007-019-027-251500-
/O.NEW.KLSX.FF.W.0009.210625T0904Z-210625T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service St Louis MO
404 AM CDT Fri Jun 25 2021

The National Weather Service in St Louis has issued a

* Flash Flood Warning for...
  Western Audrain County in central Missouri...
  Boone County in central Missouri...
  Northwestern Callaway County in central Missouri...

* Until 1000 AM CDT.

* At 404 AM CDT, emergency management reported thunderstorms 
  producing heavy rain across the warned area. Between 2 and 4 
  inches of rain have fallen. Additional rainfall amounts of 1 to 2 
  inches are possible in the warned area. Flash flooding is already 
  occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management reported.

  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...
  Columbia, Mexico, Centralia, Hallsville, Auxvasse, Sturgeon, 
  Rocheport, Murry, Midway, Harrisburg, Kingdom City, Vandiver, 
  Hatton and Thompson.

This includes the following State Parks...
	Finger Lakes State Park.

This includes the following highways...
	Interstate 70 in Missouri between exits 115 and 124...and
	between exits 131 and 144.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3892 9250 3898 9257 3899 9256 3925 9243
      3925 9231 3932 9231 3931 9180 3896 9181
      3893 9225 3899 9226 3899 9237 3893 9237

FLASH FLOOD...OBSERVED

$$

Walsh

1 follow-up statement

092 
WGUS73 KLSX 251134
FFSLSX

Flash Flood Statement
National Weather Service St Louis MO
634 AM CDT Fri Jun 25 2021

MOC007-019-027-251500-
/O.CON.KLSX.FF.W.0009.000000T0000Z-210625T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Audrain MO-Boone MO-Callaway MO-
634 AM CDT Fri Jun 25 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 10 AM CDT THIS 
MORNING FOR WESTERN AUDRAIN, BOONE AND NORTHWESTERN CALLAWAY 
COUNTIES...

At 634 AM CDT, Emergency management reported flash flooding across 
the warned area. Between 3 and 5 inches of rain have fallen. 
Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

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...
  Columbia, Mexico, Centralia, Hallsville, Auxvasse, Sturgeon, 
  Rocheport, Murry, Midway, Harrisburg, Kingdom City, Vandiver, 
  Hatton and Thompson.

This includes the following State Parks...
	Finger Lakes State Park.

This includes the following highways...
	Interstate 70 in Missouri between exits 115 and 124...and
	between exits 131 and 144.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3892 9250 3898 9257 3899 9256 3925 9243
      3925 9231 3932 9231 3931 9180 3896 9181
      3893 9225 3899 9226 3899 9237 3893 9237

FLASH FLOOD...OBSERVED

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 10:57 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Shelby	48 min
Jun 24, 11:03 PM CDT	Tornado Warning	LSX	Monroe, Shelby	42 min
Jun 24, 11:29 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lewis, Marion, Monroe, Pike, Ralls and 1 more	46 min
Jun 24, 11:32 PM CDT	Tornado Warning	LSX	Lewis	28 min
Jun 24, 11:35 PM CDT	Tornado Warning	LSX	Audrain, Monroe, Ralls	40 min
Jun 24, 11:40 PM CDT	Tornado Warning	LSX	Marion, Monroe, Ralls, Shelby	38 min
Jun 25, 12:09 AM CDT	Tornado Warning	LSX	Audrain, Pike, Ralls	51 min
Jun 25, 12:17 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	43 min
Jun 25, 12:57 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	48 min
Jun 25, 1:27 AM CDT	River Flood Warning	LSX	Boone	33 hr
Jun 25, 1:54 AM CDT	Areal Flood Advisory	LSX	Montgomery	3 hr
Jun 25, 2:21 AM CDT	Areal Flood Advisory	LSX	Audrain, Boone, Callaway	106 min
Jun 25, 3:07 AM CDT	Areal Flood Advisory	LSX	Boone, Callaway, Cole, Moniteau	82 min
Jun 25, 3:34 AM CDT	Flash Flood Warning	LSX	Boone	6 hr
Jun 25, 4:26 AM CDT	Flash Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	6 hr
Jun 25, 4:28 AM CDT	Flash Flood Warning	LSX	Callaway, Lincoln, Montgomery, Osage, Warren	6 hr
Jun 25, 7:48 AM CDT	River Flood Warning	LSX	Lincoln	62 hr
Jun 25, 8:25 AM CDT	Areal Flood Warning	LSX	Audrain, Boone, Callaway, Cole, Moniteau	9 hr
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Franklin, Warren	9 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	21 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	8 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Callaway, Osage	21 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	10 days
Jun 25, 4:59 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Osage	20 min
Jun 25, 5:01 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Moniteau	44 min
Jun 25, 5:05 PM CDT	River Flood Warning	LSX	Cole, Osage	9 days
Jun 25, 5:42 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	22 min
Jun 25, 6:07 PM CDT	River Flood Warning	LSX	Lincoln	3 days
Jun 25, 6:36 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	39 min
Jun 25, 6:43 PM CDT	Flash Flood Warning	LSX	Audrain, Boone, Callaway	6 hr
Jun 25, 6:48 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	42 min
Jun 25, 6:55 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	19 min

Nearby

Flash Flood Warnings in Missouri, 2021 Every flash flood warning in 2021

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.