Alert archive / Missouri / Flash Flood Warnings in 2020

Flash Flood Warning 49, NWS Springfield, MO

July 30, 2020Benton County, Morgan County, Missouri

NWS Springfield, MO issued this flash flood warning at Jul 30, 2020, 7:25 PM CDT for Benton County, Morgan County, Missouri. It was in force for 6 hr. 2 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: Jul 30, 2020, 7:25 PM CDT (00:25 UTC)
Expired: Jul 31, 2020, 1:07 AM CDT
In force: 6 hr
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Flood severity: None

Counties Benton County, MO, Morgan County, MO

The radar

The Pleasant Hill radar (KEAX), 129 km from the middle of the area, began a volume at 00:29 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

Time	Report	Where	Remark
Jul 30, 7:30 PM CDT	FLASH FLOOD	1 W Versailles, MO	SOME CITY STREETS WERE BECOMING FLOODED AND IMPASSABLE IN VERSAILLES OFF OF STATE HIGHWAY 52 NEAR NEWTON AND DEKALB STREETS. OBSERVED RAINFALL OF 1-2 INCHES PER HOUR HAVE ALSO BEEN REPORTED.
Jul 30, 8:28 PM CDT	HEAVY RAIN 3	6 N Barnett, MO	PUBLIC WEATHER STATION REPORT, 3 INCHES OF RAIN MEASURED IN 90 MINUTES. 1 INCH OF THAT RAIN FELL IN A 20 MIN PERIOD.

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, 0.4 hours before the alert went out and 188 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

195 
WGUS53 KSGF 310025
FFWSGF
MOC015-141-310630-
/O.NEW.KSGF.FF.W.0049.200731T0025Z-200731T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Springfield MO
725 PM CDT Thu Jul 30 2020

The National Weather Service in Springfield has issued a

* Flash Flood Warning for...
  Northeastern Benton County in central Missouri...
  Central Morgan County in central Missouri...

* Until 130 AM CDT Friday.

* At 725 PM CDT, law enforcement reported thunderstorms producing 
  heavy rain across the warned area. Up to two inches of rain have 
  already fallen with an additional one to two inches possible. 
  Flash flooding is already occurring in the city of Versailles off 
  of State Highway 52.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Law enforcement.

  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...
  Versailles...                     Stover...

This warning includes but is not limited to the following low water
crossings...
Route WW at Archer Creek northeast of Lakeview Heights...
and Ritchey Road at Gravois Creek northeast of Gravois Mills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3851 9273 3843 9262 3837 9270 3829 9309
      3833 9316 3852 9302

FLASH FLOOD...OBSERVED

$$

Burchfield

2 follow-up statements

679 
WGUS73 KSGF 310338
FFSSGF

Flash Flood Statement
National Weather Service Springfield MO
1038 PM CDT Thu Jul 30 2020

MOC015-141-310630-
/O.CON.KSGF.FF.W.0049.000000T0000Z-200731T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton MO-Morgan MO-
1038 PM CDT Thu Jul 30 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 AM CDT FRIDAY
FOR NORTHEASTERN BENTON AND CENTRAL MORGAN COUNTIES...

At 1037 PM CDT, Doppler radar and automated gauges indicated that 
three inches of rainfall had fallen across the area earlier this 
evening. Runoff from this heavy rainfall may continue to produce 
flooding. 

HAZARD...Flash flooding caused by heavy rain.

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...
Versailles...                     Stover...

This warning includes but is not limited to the following low water
crossings...
Route WW at Archer Creek northeast of Lakeview Heights...
and Ritchey Road at Gravois Creek northeast of Gravois Mills.

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.

&&

LAT...LON 3851 9273 3843 9262 3837 9270 3829 9309
      3833 9316 3852 9302

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Burchfield

166 
WGUS73 KSGF 310607
FFSSGF

Flash Flood Statement
National Weather Service Springfield MO
107 AM CDT Fri Jul 31 2020

MOC015-141-310617-
/O.CAN.KSGF.FF.W.0049.000000T0000Z-200731T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Benton MO-Morgan MO-
107 AM CDT Fri Jul 31 2020

...THE FLASH FLOOD WARNING FOR NORTHEASTERN BENTON AND CENTRAL MORGAN
COUNTIES IS CANCELLED...

The heavy rain has ended. Flash flooding is no longer expected to
pose a threat. Please continue to heed any remaining road closures.

LAT...LON 3851 9273 3843 9262 3837 9270 3829 9309
      3833 9316 3852 9302

$$

Albano

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 9:55 PM CDT	Special Weather Statement	SGF	Greene	50 min
Jul 31, 3:08 AM CDT	Flash Flood Watch	SGF	Barry, Barton, Cedar, Christian, Dade, Dallas and 21 more	17 hr
Jul 31, 3:42 AM CDT	Areal Flood Advisory	SGF	St. Clair	8 hr
Jul 31, 4:23 AM CDT	Flash Flood Warning	SGF	St. Clair	10 hr
Jul 31, 8:58 AM CDT	Areal Flood Advisory	SGF	Hickory	3 hr
Jul 31, 10:13 AM CDT	Flash Flood Warning	SGF	Benton, Hickory	6 hr
Jul 31, 1:17 PM CDT	Areal Flood Advisory	SGF	Dallas, Laclede, Webster	6 hr
Jul 31, 2:04 PM CDT	Areal Flood Warning	SGF	St. Clair	6 hr
Jul 31, 3:02 PM CDT	Areal Flood Advisory	SGF	Dent, Douglas, Howell, Phelps, Shannon, Texas and 2 more	6 hr
Jul 31, 4:01 PM CDT	Areal Flood Warning	SGF	Benton, Hickory	6 hr
Jul 31, 4:39 PM CDT	Flash Flood Warning	SGF	Dent, Shannon	6 hr

Nearby

Flash Flood Warnings in Missouri, 2020 Every 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.